From ae2c933c3a182574b22a70ac05938c7b8b3212f0 Mon Sep 17 00:00:00 2001 From: gaurav-aws Date: Thu, 14 Jun 2018 19:43:17 +0000 Subject: [PATCH] Add Xtensa port The project file is for Xtensa Xplorer simulator. Also add tests for one size stream buffer. git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@2549 1d2547de-c912-0410-9cb9-b8ca96c0e9e2 --- .../Demo/Common/Minimal/MessageBufferDemo.c | 4 +- .../Demo/Common/Minimal/StreamBufferDemo.c | 52 +- .../Tensilica_Simulator_Xplorer_XCC/.cproject | 214 ++ .../Tensilica_Simulator_Xplorer_XCC/.project | 382 ++++ .../.settings/targets/xtensa/CommonTarget.bts | 10 + .../.settings/targets/xtensa/Debug.bts | 40 + .../.xxproject | 21 + .../FreeRTOSConfig.h | 250 +++ .../IntQueueTimer.c | 156 ++ .../IntQueueTimer.h | 36 + .../Tensilica_Simulator_Xplorer_XCC/main.c | 181 ++ .../main_blinky.c | 265 +++ .../main_full.c | 437 ++++ .../regtest_xtensa.S | 219 ++ .../portable/ThirdParty/XCC/Xtensa/Makefile | 98 + .../portable/ThirdParty/XCC/Xtensa/port.c | 261 +++ .../portable/ThirdParty/XCC/Xtensa/portasm.S | 597 ++++++ .../ThirdParty/XCC/Xtensa/portbenchmark.h | 46 + .../portable/ThirdParty/XCC/Xtensa/portclib.c | 225 ++ .../ThirdParty/XCC/Xtensa/portmacro.h | 244 +++ .../ThirdParty/XCC/Xtensa/porttrace.h | 42 + .../ThirdParty/XCC/Xtensa/readme_xtensa.txt | 764 +++++++ .../ThirdParty/XCC/Xtensa/xtensa_api.h | 122 ++ .../ThirdParty/XCC/Xtensa/xtensa_config.h | 182 ++ .../ThirdParty/XCC/Xtensa/xtensa_context.S | 624 ++++++ .../ThirdParty/XCC/Xtensa/xtensa_context.h | 350 +++ .../ThirdParty/XCC/Xtensa/xtensa_init.c | 65 + .../ThirdParty/XCC/Xtensa/xtensa_intr.c | 132 ++ .../ThirdParty/XCC/Xtensa/xtensa_intr_asm.S | 179 ++ .../XCC/Xtensa/xtensa_overlay_os_hook.c | 67 + .../ThirdParty/XCC/Xtensa/xtensa_rtos.h | 233 ++ .../ThirdParty/XCC/Xtensa/xtensa_timer.h | 159 ++ .../ThirdParty/XCC/Xtensa/xtensa_vectors.S | 1903 +++++++++++++++++ FreeRTOS/Source/stream_buffer.c | 9 +- 34 files changed, 8564 insertions(+), 5 deletions(-) create mode 100644 FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.cproject create mode 100644 FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.project create mode 100644 FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.settings/targets/xtensa/CommonTarget.bts create mode 100644 FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.settings/targets/xtensa/Debug.bts create mode 100644 FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.xxproject create mode 100644 FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/FreeRTOSConfig.h create mode 100644 FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/IntQueueTimer.c create mode 100644 FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/IntQueueTimer.h create mode 100644 FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/main.c create mode 100644 FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/main_blinky.c create mode 100644 FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/main_full.c create mode 100644 FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/regtest_xtensa.S create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/Makefile create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/port.c create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portasm.S create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portbenchmark.h create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portclib.c create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portmacro.h create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/porttrace.h create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/readme_xtensa.txt create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_api.h create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_config.h create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_context.S create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_context.h create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_init.c create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_intr.c create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_intr_asm.S create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_overlay_os_hook.c create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_rtos.h create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_timer.h create mode 100644 FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_vectors.S diff --git a/FreeRTOS/Demo/Common/Minimal/MessageBufferDemo.c b/FreeRTOS/Demo/Common/Minimal/MessageBufferDemo.c index cbcff88e5..b09490fac 100644 --- a/FreeRTOS/Demo/Common/Minimal/MessageBufferDemo.c +++ b/FreeRTOS/Demo/Common/Minimal/MessageBufferDemo.c @@ -783,9 +783,9 @@ const TickType_t xTicksToBlock = pdMS_TO_TICKS( 250UL ); memset( pcReceivedString, 0x00, mbMESSAGE_BUFFER_LENGTH_BYTES ); /* Has any data been sent by the client? */ - xReceivedLength = xMessageBufferReceive( xMessageBuffers.xEchoClientBuffer, ( void * ) pcReceivedString, mbMESSAGE_BUFFER_LENGTH_BYTES, xTicksToBlock ); + xReceivedLength = xMessageBufferReceive( xMessageBuffers.xEchoClientBuffer, ( void * ) pcReceivedString, mbMESSAGE_BUFFER_LENGTH_BYTES, portMAX_DELAY ); - /* Should always receive data as a delay was used. */ + /* Should always receive data as max delay was used. */ configASSERT( xReceivedLength > 0 ); /* Echo the received data back to the client. */ diff --git a/FreeRTOS/Demo/Common/Minimal/StreamBufferDemo.c b/FreeRTOS/Demo/Common/Minimal/StreamBufferDemo.c index 04a93a03f..a9058d5da 100644 --- a/FreeRTOS/Demo/Common/Minimal/StreamBufferDemo.c +++ b/FreeRTOS/Demo/Common/Minimal/StreamBufferDemo.c @@ -40,6 +40,9 @@ /* The number of bytes of storage in the stream buffers used in this test. */ #define sbSTREAM_BUFFER_LENGTH_BYTES ( ( size_t ) 30 ) +/* Stream buffer length one. */ +#define sbSTREAM_BUFFER_LENGTH_ONE ( ( size_t ) 1 ) + /* Start and end ASCII characters used in data sent to the buffers. */ #define sbASCII_SPACE 32 #define sbASCII_TILDA 126 @@ -768,6 +771,51 @@ EchoStreamBuffers_t *pxStreamBuffers = ( EchoStreamBuffers_t * ) pvParameters; xTempStreamBuffer = xStreamBufferCreate( sbSTREAM_BUFFER_LENGTH_BYTES, sbTRIGGER_LEVEL_1 ); prvSingleTaskTests( xTempStreamBuffer ); vStreamBufferDelete( xTempStreamBuffer ); + + /* The following are tests for a stream buffer of size one. */ + /* Create a buffer of size one. */ + xTempStreamBuffer = xStreamBufferCreate( sbSTREAM_BUFFER_LENGTH_ONE, sbTRIGGER_LEVEL_1 ); + /* Ensure that the buffer was created successfully. */ + configASSERT( xTempStreamBuffer ); + + /* Send one byte to the buffer. */ + ux = xStreamBufferSend( xTempStreamBuffer, ( void * ) pcStringToSend, ( size_t ) 1, sbDONT_BLOCK ); + /* Ensure that the byte was sent successfully. */ + configASSERT( ux == 1 ); + /* Try sending another byte to the buffer. */ + ux = xStreamBufferSend( xTempStreamBuffer, ( void * ) pcStringToSend, ( size_t ) 1, sbDONT_BLOCK ); + /* Make sure that send failed as the buffer is full. */ + configASSERT( ux == 0 ); + + /* Receive one byte from the buffer. */ + memset( pcStringReceived, 0x00, sbSTREAM_BUFFER_LENGTH_BYTES ); + ux = xStreamBufferReceive( xTempStreamBuffer, ( void * ) pcStringReceived, ( size_t ) 1, sbDONT_BLOCK ); + /* Ensure that the receive was successful. */ + configASSERT( ux == 1 ); + /* Ensure that the correct data was received. */ + configASSERT( pcStringToSend[ 0 ] == pcStringReceived[ 0 ] ); + /* Try receiving another byte from the buffer. */ + ux = xStreamBufferReceive( xTempStreamBuffer, ( void * ) pcStringReceived, ( size_t ) 1, sbDONT_BLOCK ); + /* Ensure that the receive failed as the buffer is empty. */ + configASSERT( ux == 0 ); + + /* Try sending two bytes to the buffer. Since the size of the + * buffer is one, we must not be able to send more than one. */ + ux = xStreamBufferSend( xTempStreamBuffer, ( void * ) pcStringToSend, ( size_t ) 2, sbDONT_BLOCK ); + /* Ensure that only one byte was sent. */ + configASSERT( ux == 1 ); + + /* Try receiving two bytes from the buffer. Since the size of the + * buffer is one, we must not be able to get more than one. */ + memset( pcStringReceived, 0x00, sbSTREAM_BUFFER_LENGTH_BYTES ); + ux = xStreamBufferReceive( xTempStreamBuffer, ( void * ) pcStringReceived, ( size_t ) 2, sbDONT_BLOCK ); + /* Ensure that only one byte was received. */ + configASSERT( ux == 1 ); + /* Ensure that the correct data was received. */ + configASSERT( pcStringToSend[ 0 ] == pcStringReceived[ 0 ] ); + + /* Delete the buffer. */ + vStreamBufferDelete( xTempStreamBuffer ); } } /*-----------------------------------------------------------*/ @@ -822,9 +870,9 @@ const TickType_t xTicksToBlock = pdMS_TO_TICKS( 350UL ); memset( pcReceivedString, 0x00, sbSTREAM_BUFFER_LENGTH_BYTES ); /* Has any data been sent by the client? */ - xReceivedLength = xStreamBufferReceive( xStreamBuffers.xEchoClientBuffer, ( void * ) pcReceivedString, sbSTREAM_BUFFER_LENGTH_BYTES, xTicksToBlock ); + xReceivedLength = xStreamBufferReceive( xStreamBuffers.xEchoClientBuffer, ( void * ) pcReceivedString, sbSTREAM_BUFFER_LENGTH_BYTES, portMAX_DELAY ); - /* Should always receive data as a delay was used. */ + /* Should always receive data as max delay was used. */ prvCheckExpectedState( xReceivedLength > 0 ); /* Echo the received data back to the client. */ diff --git a/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.cproject b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.cproject new file mode 100644 index 000000000..8cca4c4af --- /dev/null +++ b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.cproject @@ -0,0 +1,214 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + diff --git a/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.project b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.project new file mode 100644 index 000000000..51db76b71 --- /dev/null +++ b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.project @@ -0,0 +1,382 @@ + + + RTOSDemo + + + XtensaInfo + + + + com.tensilica.xide.cdt.xtensamanagedbuilder + + + + + org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder + full,incremental, + + + + + + org.eclipse.cdt.core.cnature + org.eclipse.cdt.core.ccnature + org.eclipse.cdt.managedbuilder.core.managedBuildNature + org.eclipse.cdt.managedbuilder.core.ScannerConfigNature + com.tensilica.xide.cdt.XtensaCProjectNature + com.tensilica.xide.cdt.XtensaCProjectExeNature + com.tensilica.xide.cdt.XideManagedProjectNature + + + + CommonDemoTasks + 2 + virtual:/virtual + + + FreeRTOS_Source + 2 + virtual:/virtual + + + CommonDemoTasks/AbortDelay.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/AbortDelay.c + + + CommonDemoTasks/BlockQ.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/BlockQ.c + + + CommonDemoTasks/EventGroupsDemo.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/EventGroupsDemo.c + + + CommonDemoTasks/GenQTest.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/GenQTest.c + + + CommonDemoTasks/IntQueue.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/IntQueue.c + + + CommonDemoTasks/IntSemTest.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/IntSemTest.c + + + CommonDemoTasks/MessageBufferDemo.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/MessageBufferDemo.c + + + CommonDemoTasks/PollQ.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/PollQ.c + + + CommonDemoTasks/QPeek.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/QPeek.c + + + CommonDemoTasks/QueueOverwrite.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/QueueOverwrite.c + + + CommonDemoTasks/QueueSet.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/QueueSet.c + + + CommonDemoTasks/QueueSetPolling.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/QueueSetPolling.c + + + CommonDemoTasks/StaticAllocation.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/StaticAllocation.c + + + CommonDemoTasks/StreamBufferDemo.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/StreamBufferDemo.c + + + CommonDemoTasks/StreamBufferInterrupt.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/StreamBufferInterrupt.c + + + CommonDemoTasks/TaskNotify.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/TaskNotify.c + + + CommonDemoTasks/TimerDemo.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/TimerDemo.c + + + CommonDemoTasks/blocktim.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/blocktim.c + + + CommonDemoTasks/countsem.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/countsem.c + + + CommonDemoTasks/death.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/death.c + + + CommonDemoTasks/flop.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/flop.c + + + CommonDemoTasks/include + 2 + PARENT-1-PROJECT_LOC/Common/include + + + CommonDemoTasks/integer.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/integer.c + + + CommonDemoTasks/recmutex.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/recmutex.c + + + CommonDemoTasks/semtest.c + 1 + PARENT-1-PROJECT_LOC/Common/Minimal/semtest.c + + + FreeRTOS_Source/event_groups.c + 1 + PARENT-2-PROJECT_LOC/Source/event_groups.c + + + FreeRTOS_Source/include + 2 + virtual:/virtual + + + FreeRTOS_Source/list.c + 1 + PARENT-2-PROJECT_LOC/Source/list.c + + + FreeRTOS_Source/portable + 2 + virtual:/virtual + + + FreeRTOS_Source/queue.c + 1 + PARENT-2-PROJECT_LOC/Source/queue.c + + + FreeRTOS_Source/readme.txt + 1 + PARENT-2-PROJECT_LOC/Source/readme.txt + + + FreeRTOS_Source/stream_buffer.c + 1 + PARENT-2-PROJECT_LOC/Source/stream_buffer.c + + + FreeRTOS_Source/tasks.c + 1 + PARENT-2-PROJECT_LOC/Source/tasks.c + + + FreeRTOS_Source/timers.c + 1 + PARENT-2-PROJECT_LOC/Source/timers.c + + + FreeRTOS_Source/include/FreeRTOS.h + 1 + PARENT-2-PROJECT_LOC/Source/include/FreeRTOS.h + + + FreeRTOS_Source/include/event_groups.h + 1 + PARENT-2-PROJECT_LOC/Source/include/event_groups.h + + + FreeRTOS_Source/include/list.h + 1 + PARENT-2-PROJECT_LOC/Source/include/list.h + + + FreeRTOS_Source/include/message_buffer.h + 1 + PARENT-2-PROJECT_LOC/Source/include/message_buffer.h + + + FreeRTOS_Source/include/mpu_prototypes.h + 1 + PARENT-2-PROJECT_LOC/Source/include/mpu_prototypes.h + + + FreeRTOS_Source/include/mpu_wrappers.h + 1 + PARENT-2-PROJECT_LOC/Source/include/mpu_wrappers.h + + + FreeRTOS_Source/include/portable.h + 1 + PARENT-2-PROJECT_LOC/Source/include/portable.h + + + FreeRTOS_Source/include/projdefs.h + 1 + PARENT-2-PROJECT_LOC/Source/include/projdefs.h + + + FreeRTOS_Source/include/queue.h + 1 + PARENT-2-PROJECT_LOC/Source/include/queue.h + + + FreeRTOS_Source/include/semphr.h + 1 + PARENT-2-PROJECT_LOC/Source/include/semphr.h + + + FreeRTOS_Source/include/stream_buffer.h + 1 + PARENT-2-PROJECT_LOC/Source/include/stream_buffer.h + + + FreeRTOS_Source/include/task.h + 1 + PARENT-2-PROJECT_LOC/Source/include/task.h + + + FreeRTOS_Source/include/timers.h + 1 + PARENT-2-PROJECT_LOC/Source/include/timers.h + + + FreeRTOS_Source/portable/MemMang + 2 + virtual:/virtual + + + FreeRTOS_Source/portable/XCC + 2 + virtual:/virtual + + + FreeRTOS_Source/portable/MemMang/heap_4.c + 1 + PARENT-2-PROJECT_LOC/Source/portable/MemMang/heap_4.c + + + FreeRTOS_Source/portable/XCC/port.c + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/port.c + + + FreeRTOS_Source/portable/XCC/portasm.S + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/portasm.S + + + FreeRTOS_Source/portable/XCC/portbenchmark.h + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/portbenchmark.h + + + FreeRTOS_Source/portable/XCC/portclib.c + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/portclib.c + + + FreeRTOS_Source/portable/XCC/portmacro.h + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/portmacro.h + + + FreeRTOS_Source/portable/XCC/porttrace.h + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/porttrace.h + + + FreeRTOS_Source/portable/XCC/readme_xtensa.txt + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/readme_xtensa.txt + + + FreeRTOS_Source/portable/XCC/xtensa_api.h + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/xtensa_api.h + + + FreeRTOS_Source/portable/XCC/xtensa_config.h + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/xtensa_config.h + + + FreeRTOS_Source/portable/XCC/xtensa_context.S + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/xtensa_context.S + + + FreeRTOS_Source/portable/XCC/xtensa_context.h + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/xtensa_context.h + + + FreeRTOS_Source/portable/XCC/xtensa_init.c + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/xtensa_init.c + + + FreeRTOS_Source/portable/XCC/xtensa_intr.c + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/xtensa_intr.c + + + FreeRTOS_Source/portable/XCC/xtensa_intr_asm.S + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/xtensa_intr_asm.S + + + FreeRTOS_Source/portable/XCC/xtensa_overlay_os_hook.c + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/xtensa_overlay_os_hook.c + + + FreeRTOS_Source/portable/XCC/xtensa_rtos.h + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/xtensa_rtos.h + + + FreeRTOS_Source/portable/XCC/xtensa_timer.h + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/xtensa_timer.h + + + FreeRTOS_Source/portable/XCC/xtensa_vectors.S + 1 + PARENT-2-PROJECT_LOC/Source/portable/ThirdParty/XCC/Xtensa/xtensa_vectors.S + + + diff --git a/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.settings/targets/xtensa/CommonTarget.bts b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.settings/targets/xtensa/CommonTarget.bts new file mode 100644 index 000000000..430333b7c --- /dev/null +++ b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.settings/targets/xtensa/CommonTarget.bts @@ -0,0 +1,10 @@ + + + + + + + + + + diff --git a/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.settings/targets/xtensa/Debug.bts b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.settings/targets/xtensa/Debug.bts new file mode 100644 index 000000000..e04cdd349 --- /dev/null +++ b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.settings/targets/xtensa/Debug.bts @@ -0,0 +1,40 @@ + + + + + + + + Optimization + + + + Debug + + + + + + + + AssemblerIncludeDebug + + + + AssemblerLongCall + + + + + + + + CreateMinsize + + + + + + + + diff --git a/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.xxproject b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.xxproject new file mode 100644 index 000000000..06a21cd9d --- /dev/null +++ b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/.xxproject @@ -0,0 +1,21 @@ + + + + + + + + + + + + + + + + + + + + + diff --git a/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/FreeRTOSConfig.h b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/FreeRTOSConfig.h new file mode 100644 index 000000000..7aebd5f36 --- /dev/null +++ b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/FreeRTOSConfig.h @@ -0,0 +1,250 @@ +/* + FreeRTOS V9.0.0 - Copyright (C) 2016 Real Time Engineers Ltd. + All rights reserved + + VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. + + This file is part of the FreeRTOS distribution. + + FreeRTOS is free software; you can redistribute it and/or modify it under + the terms of the GNU General Public License (version 2) as published by the + Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception. + + *************************************************************************** + >>! NOTE: The modification to the GPL is included to allow you to !<< + >>! distribute a combined work that includes FreeRTOS without being !<< + >>! obliged to provide the source code for proprietary components !<< + >>! outside of the FreeRTOS kernel. !<< + *************************************************************************** + + FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + FOR A PARTICULAR PURPOSE. Full license text is available on the following + link: http://www.freertos.org/a00114.html + + *************************************************************************** + * * + * FreeRTOS provides completely free yet professionally developed, * + * robust, strictly quality controlled, supported, and cross * + * platform software that is more than just the market leader, it * + * is the industry's de facto standard. * + * * + * Help yourself get started quickly while simultaneously helping * + * to support the FreeRTOS project by purchasing a FreeRTOS * + * tutorial book, reference manual, or both: * + * http://www.FreeRTOS.org/Documentation * + * * + *************************************************************************** + + http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading + the FAQ page "My application does not run, what could be wrong?". Have you + defined configASSERT()? + + http://www.FreeRTOS.org/support - In return for receiving this top quality + embedded software for free we request you assist our global community by + participating in the support forum. + + http://www.FreeRTOS.org/training - Investing in training allows your team to + be as productive as possible as early as possible. Now you can receive + FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers + Ltd, and the world's leading authority on the world's leading RTOS. + + http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, + including FreeRTOS+Trace - an indispensable productivity tool, a DOS + compatible FAT file system, and our tiny thread aware UDP/IP stack. + + http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate. + Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS. + + http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High + Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS + licenses offer ticketed support, indemnification and commercial middleware. + + http://www.SafeRTOS.com - High Integrity Systems also provide a safety + engineered and independently SIL3 certified version for use in safety and + mission critical applications that require provable dependability. + + 1 tab == 4 spaces! +*/ + +#ifndef FREERTOS_CONFIG_H +#define FREERTOS_CONFIG_H + + +/* Required for configuration-dependent settings */ +#include "xtensa_config.h" + +/*----------------------------------------------------------- + * Application specific definitions. + * + * These definitions should be adjusted for your particular hardware and + * application requirements. + * + * Note that the default heap size is deliberately kept small so that + * the build is more likely to succeed for configurations with limited + * memory. + * + * THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE + * FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE. + *----------------------------------------------------------*/ + +#define configUSE_PREEMPTION 1 +#define configUSE_IDLE_HOOK 0 + +#ifdef SMALL_TEST +#define configUSE_TICK_HOOK 0 +#else +#define configUSE_TICK_HOOK 1 +#endif + +#define configTICK_RATE_HZ ( 1000 ) + +/* Default clock rate for simulator */ +#define configCPU_CLOCK_HZ 10000000 //_RB_ was 2MHz + +/* This has impact on speed of search for highest priority */ +#ifdef SMALL_TEST +#define configMAX_PRIORITIES ( 7 ) +#else +#define configMAX_PRIORITIES ( 7 ) //_RB_ +#endif + +/* Minimal stack size. This may need to be increased for your application */ +/* NOTE: The FreeRTOS demos may not work reliably with stack size < 4KB. */ +/* The Xtensa-specific examples should be fine with XT_STACK_MIN_SIZE. */ +#if !(defined XT_STACK_MIN_SIZE) +#error XT_STACK_MIN_SIZE not defined, did you include xtensa_config.h ? +#endif + +#ifdef SMALL_TEST +#define configMINIMAL_STACK_SIZE (XT_STACK_MIN_SIZE) +#else +#define configMINIMAL_STACK_SIZE (XT_STACK_MIN_SIZE > 4096 ? XT_STACK_MIN_SIZE : 4096) +#endif + +/* The Xtensa port uses a separate interrupt stack. Adjust the stack size */ +/* to suit the needs of your specific application. */ +#ifndef configISR_STACK_SIZE +#define configISR_STACK_SIZE 2048 +#endif + +/* Minimal heap size to make sure examples can run on memory limited + configs. Adjust this to suit your system. */ +#ifdef SMALL_TEST +#define configTOTAL_HEAP_SIZE ( ( size_t ) (16 * 1024) ) +#else +#define configTOTAL_HEAP_SIZE ( ( size_t ) (512 * 1024) ) +#endif + +#define configMAX_TASK_NAME_LEN ( 8 ) +#define configUSE_TRACE_FACILITY 1 /* Used by vTaskList in main.c */ +#define configUSE_STATS_FORMATTING_FUNCTIONS 0 /* Used by vTaskList in main.c */ +#define configUSE_TRACE_FACILITY_2 0 /* Provided by Xtensa port patch */ +#define configBENCHMARK 0 /* Provided by Xtensa port patch */ +#define configUSE_16_BIT_TICKS 0 +#define configIDLE_SHOULD_YIELD 0 +#define configQUEUE_REGISTRY_SIZE 0 + +#ifdef SMALL_TEST +#define configUSE_MUTEXES 1 +#define configUSE_RECURSIVE_MUTEXES 1 +#define configUSE_COUNTING_SEMAPHORES 1 +#define configCHECK_FOR_STACK_OVERFLOW 0 +#else +#define configUSE_MUTEXES 1 +#define configUSE_RECURSIVE_MUTEXES 1 +#define configUSE_COUNTING_SEMAPHORES 1 +#define configCHECK_FOR_STACK_OVERFLOW 2 +#endif + +/* Co-routine definitions. */ +#define configUSE_CO_ROUTINES 0 +#define configMAX_CO_ROUTINE_PRIORITIES ( 2 ) + +/* Set the following definitions to 1 to include the API function, or zero + to exclude the API function. */ +#define INCLUDE_vTaskPrioritySet 1 +#define INCLUDE_uxTaskPriorityGet 1 +#define INCLUDE_vTaskDelete 1 +#define INCLUDE_vTaskCleanUpResources 0 +#define INCLUDE_vTaskSuspend 1 +#define INCLUDE_vTaskDelayUntil 1 +#define INCLUDE_vTaskDelay 1 +#define INCLUDE_uxTaskGetStackHighWaterMark 1 +#define INCLUDE_xTaskAbortDelay 1 +#define INCLUDE_xTaskGetHandle 1 +#define INCLUDE_xSemaphoreGetMutexHolder 1 + +/* The priority at which the tick interrupt runs. This should probably be + kept at 1. */ +#define configKERNEL_INTERRUPT_PRIORITY 1 + +/* The maximum interrupt priority from which FreeRTOS.org API functions can + be called. Only API functions that end in ...FromISR() can be used within + interrupts. */ +#define configMAX_SYSCALL_INTERRUPT_PRIORITY XCHAL_EXCM_LEVEL + +/* XT_USE_THREAD_SAFE_CLIB is defined in xtensa_config.h and can be + overridden from the compiler/make command line. The small test + however always disables C lib thread safety to minimize size. */ +#ifdef SMALL_TEST + #define configUSE_NEWLIB_REENTRANT 0 +#else +#if (XT_USE_THREAD_SAFE_CLIB > 0u) + #if XT_HAVE_THREAD_SAFE_CLIB + #define configUSE_NEWLIB_REENTRANT 0 //_RB_ 1 + #else + #error "Error: thread-safe C library support not available for this C library." + #endif +#else + #define configUSE_NEWLIB_REENTRANT 0 +#endif +#endif + +/* Test FreeRTOS timers (with timer task) and more. */ +/* Some files don't compile if this flag is disabled */ +#define configUSE_TIMERS 1 +#define configTIMER_TASK_PRIORITY ( configMAX_PRIORITIES - 2 ) +#define configTIMER_QUEUE_LENGTH 10 +#define configTIMER_TASK_STACK_DEPTH configMINIMAL_STACK_SIZE + +#ifdef SMALL_TEST +#define INCLUDE_xTimerPendFunctionCall 0 +#define INCLUDE_eTaskGetState 0 +#define configUSE_QUEUE_SETS 0 +#else +#define INCLUDE_xTimerPendFunctionCall 1 +#define INCLUDE_eTaskGetState 1 +#define configUSE_QUEUE_SETS 1 +#endif + +/* Specific config for XTENSA (these can be deleted and they will take default values) */ + +#if (!defined XT_SIMULATOR) && (!defined XT_BOARD) +#define configXT_SIMULATOR 1 /* Simulator mode */ +#define configXT_BOARD 0 /* Board mode */ +#endif + +#ifndef SMALL_TEST + +#if (!defined XT_INTEXC_HOOKS) +#define configXT_INTEXC_HOOKS 1 /* Exception hooks used by certain tests */ +#endif + +#if configUSE_TRACE_FACILITY_2 +#define configASSERT_2 1 /* Specific to Xtensa port */ +#endif + +#endif + +/* It is a good idea to define configASSERT() while developing. configASSERT() +uses the same semantics as the standard C assert() macro. */ +#if !defined __ASSEMBLER__ + extern void vAssertCalled( unsigned long ulLine, const char * const pcFileName ); +#endif +#define configASSERT( x ) if( ( x ) == 0 ) vAssertCalled( __LINE__, __FILE__ ) + +#define configSTREAM_BUFFER_TRIGGER_LEVEL_TEST_MARGIN ( 2 ) +#define configCHECK_FOR_STACK_OVERFLOW 2 +#endif /* FREERTOS_CONFIG_H */ + diff --git a/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/IntQueueTimer.c b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/IntQueueTimer.c new file mode 100644 index 000000000..33e614f56 --- /dev/null +++ b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/IntQueueTimer.c @@ -0,0 +1,156 @@ +/* + * FreeRTOS Kernel V10.0.0 + * Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of + * this software and associated documentation files (the "Software"), to deal in + * the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of + * the Software, and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. If you wish to use our Amazon + * FreeRTOS name, please do so in a fair use way that does not cause confusion. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR + * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER + * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * http://www.FreeRTOS.org + * http://aws.amazon.com/freertos + * + * 1 tab == 4 spaces! + */ + +/* Scheduler includes. */ +#include "FreeRTOS.h" +#include "task.h" + +/* Demo includes. */ +#include "IntQueueTimer.h" +#include "IntQueue.h" + +/* Xtensa includes. */ +#include +#include +#include +#include +/*-----------------------------------------------------------*/ + +/* Check if Timer1 is available. */ +#if XCHAL_TIMER1_INTERRUPT != XTHAL_TIMER_UNCONFIGURED + #if XCHAL_INT_LEVEL(XCHAL_TIMER1_INTERRUPT) <= XCHAL_EXCM_LEVEL + #define SECOND_TIMER_AVAILABLE 1 + #endif +#endif + +#ifndef SECOND_TIMER_AVAILABLE + #define SECOND_TIMER_AVAILABLE 0 +#endif + +/* Timer0 is used to drive systick and therefore we use Timer1 + * as second interrupt which runs on a higher priority than + * Timer0. This ensures that systick will get interrupted by + * this timer and hence we can test interrupt nesting. */ +#define SECOND_TIMER_INDEX 1 + +/* Frequency of the second timer - This timer is configured at + * a frequency offset of 17 from the systick timer. */ +#define SECOND_TIMER_TICK_RATE_HZ ( configTICK_RATE_HZ + 17 ) +#define SECOND_TIMER_TICK_DIVISOR ( configCPU_CLOCK_HZ / SECOND_TIMER_TICK_RATE_HZ ) +/*-----------------------------------------------------------*/ + +/* Defined in main_full.c. */ +extern BaseType_t xTimerForQueueTestInitialized; +/*-----------------------------------------------------------*/ + +/* Interrupt handler for timer interrupt. */ +#if( SECOND_TIMER_AVAILABLE == 1 ) + static void prvTimer2Handler( void *arg ); +#endif /* SECOND_TIMER_AVAILABLE */ +/*-----------------------------------------------------------*/ + +void vInitialiseTimerForIntQueueTest( void ) +{ +unsigned currentCycleCount, firstComparatorValue; + + /* Inform the tick hook function that it can access queues now. */ + xTimerForQueueTestInitialized = pdTRUE; + + #if( SECOND_TIMER_AVAILABLE == 1 ) + { + /* Install the interrupt handler for second timer. */ + xt_set_interrupt_handler( XCHAL_TIMER1_INTERRUPT, prvTimer2Handler, NULL ); + + /* Read the current cycle count. */ + currentCycleCount = xthal_get_ccount(); + + /* Calculate time of the first timer interrupt. */ + firstComparatorValue = currentCycleCount + SECOND_TIMER_TICK_DIVISOR; + + /* Set the comparator. */ + xthal_set_ccompare( SECOND_TIMER_INDEX, firstComparatorValue ); + + /* Enable timer interrupt. */ + xt_ints_on( ( 1 << XCHAL_TIMER1_INTERRUPT ) ); + } + #endif /* SECOND_TIMER_AVAILABLE */ +} +/*-----------------------------------------------------------*/ + +/* + * Xtensa timers work by comparing a cycle counter with a preset value. Once the match occurs + * an interrupt is generated, and the handler has to set a new cycle count into the comparator. + * To avoid clock drift due to interrupt latency, the new cycle count is computed from the old, + * not the time the interrupt was serviced. However if a timer interrupt is ever serviced more + * than one tick late, it is necessary to process multiple ticks until the new cycle count is + * in the future, otherwise the next timer interrupt would not occur until after the cycle + * counter had wrapped (2^32 cycles later). + +do { + ticks++; + old_ccompare = read_ccompare_i(); + write_ccompare_i( old_ccompare + divisor ); + service one tick; + diff = read_ccount() - old_ccompare; +} while ( diff > divisor ); +*/ +#if( SECOND_TIMER_AVAILABLE == 1 ) + + static void prvTimer2Handler( void *arg ) + { + unsigned oldComparatorValue, newComparatorValue, currentCycleCount; + + /* Unused arguments. */ + ( void )arg; + + do + { + /* Read old comparator value. */ + oldComparatorValue = xthal_get_ccompare( SECOND_TIMER_INDEX ); + + /* Calculate the new comparator value. */ + newComparatorValue = oldComparatorValue + SECOND_TIMER_TICK_DIVISOR; + + /* Update comparator and clear interrupt. */ + xthal_set_ccompare( SECOND_TIMER_INDEX, newComparatorValue ); + + /* Process. */ + portYIELD_FROM_ISR( xSecondTimerHandler() ); + + /* Ensure comparator update is complete. */ + xthal_icache_sync(); + + /* Read current cycle count to check if we need to process more + * ticks to catch up. */ + currentCycleCount = xthal_get_ccount(); + + } while( ( currentCycleCount - oldComparatorValue ) > SECOND_TIMER_TICK_DIVISOR ); + } + +#endif /* SECOND_TIMER_AVAILABLE */ +/*-----------------------------------------------------------*/ diff --git a/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/IntQueueTimer.h b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/IntQueueTimer.h new file mode 100644 index 000000000..ebb2563e0 --- /dev/null +++ b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/IntQueueTimer.h @@ -0,0 +1,36 @@ +/* + * FreeRTOS Kernel V10.0.0 + * Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of + * this software and associated documentation files (the "Software"), to deal in + * the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of + * the Software, and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. If you wish to use our Amazon + * FreeRTOS name, please do so in a fair use way that does not cause confusion. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR + * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER + * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * http://www.FreeRTOS.org + * http://aws.amazon.com/freertos + * + * 1 tab == 4 spaces! + */ + +#ifndef INT_QUEUE_TIMER_H +#define INT_QUEUE_TIMER_H + +void vInitialiseTimerForIntQueueTest( void ); +void vTimer2Handler_C( void ); + +#endif /* INT_QUEUE_TIMER_H */ + diff --git a/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/main.c b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/main.c new file mode 100644 index 000000000..5b5ca3b59 --- /dev/null +++ b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/main.c @@ -0,0 +1,181 @@ +/* + * FreeRTOS Kernel V10.0.1 + * Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of + * this software and associated documentation files (the "Software"), to deal in + * the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of + * the Software, and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR + * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER + * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * http://www.FreeRTOS.org + * http://aws.amazon.com/freertos + * + * 1 tab == 4 spaces! + */ + +/****************************************************************************** + * This project provides two demo applications. A simple blinky style project, + * and a more comprehensive test and demo application. The + * mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting is used to select between the two. + * The simply blinky demo is implemented and described in main_blinky.c. The + * more comprehensive test and demo application is implemented and described in + * main_full.c. + * + * This file implements the code that is not demo specific, including the + * hardware setup and FreeRTOS hook functions. + * + ******************************************************************************* + */ + +/* Standard includes. */ +#include +#include + +/* FreeRTOS kernel includes. */ +#include "FreeRTOS.h" +#include "task.h" + +/* This project provides two demo applications. A simple blinky style demo +application, and a more comprehensive test and demo application. The +mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting is used to select between the two. + +If mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is 1 then the blinky demo will be built. +The blinky demo is implemented and described in main_blinky.c. + +If mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is not 1 then the comprehensive test and +demo application will be built. The comprehensive test and demo application is +implemented and described in main_full.c. */ +#define mainCREATE_SIMPLE_BLINKY_DEMO_ONLY 0 + +/*-----------------------------------------------------------*/ + +/* + * main_blinky() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 1. + * main_full() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 0. + */ +extern void main_blinky( void ); +extern void main_full( void ); + +/* + * Prototypes for the standard FreeRTOS application hook (callback) functions + * implemented within this file. See http://www.freertos.org/a00016.html . + */ +void vApplicationMallocFailedHook( void ); +void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName ); +void vApplicationTickHook( void ); + +/* + * Only the comprehensive demo uses application hook (callback) functions. See + * http://www.freertos.org/a00016.html for more information. + */ +void vFullDemoTickHookFunction( void ); + + +/*-----------------------------------------------------------*/ + +int main( void ) +{ + /* The mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting is described at the top + of this file. */ + #if ( mainCREATE_SIMPLE_BLINKY_DEMO_ONLY == 1 ) + { + main_blinky(); + } + #else + { + main_full(); + } + #endif + + return 0; +} +/*-----------------------------------------------------------*/ + +void vApplicationMallocFailedHook( void ) +{ + /* vApplicationMallocFailedHook() will only be called if + configUSE_MALLOC_FAILED_HOOK is set to 1 in FreeRTOSConfig.h. It is a hook + function that will get called if a call to pvPortMalloc() fails. + pvPortMalloc() is called internally by the kernel whenever a task, queue, + timer or semaphore is created. It is also called by various parts of the + demo application. If heap_1.c, heap_2.c or heap_4.c is being used, then the + size of the heap available to pvPortMalloc() is defined by + configTOTAL_HEAP_SIZE in FreeRTOSConfig.h, and the xPortGetFreeHeapSize() + API function can be used to query the size of free heap space that remains + (although it does not provide information on how the remaining heap might be + fragmented). See http://www.freertos.org/a00111.html for more + information. */ + vAssertCalled( __LINE__, __FILE__ ); +} +/*-----------------------------------------------------------*/ + +void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName ) +{ + ( void ) pcTaskName; + ( void ) pxTask; + + /* Run time stack overflow checking is performed if + configCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2. This hook + function is called if a stack overflow is detected. This function is + provided as an example only as stack overflow checking does not function + when running the FreeRTOS Windows port. */ + vAssertCalled( __LINE__, __FILE__ ); +} +/*-----------------------------------------------------------*/ + +void vApplicationTickHook( void ) +{ + /* This function will be called by each tick interrupt if + configUSE_TICK_HOOK is set to 1 in FreeRTOSConfig.h. User code can be + added here, but the tick hook is called from an interrupt context, so + code must not attempt to block, and only the interrupt safe FreeRTOS API + functions can be used (those that end in FromISR()). */ + + #if ( mainCREATE_SIMPLE_BLINKY_DEMO_ONLY != 1 ) + { + vFullDemoTickHookFunction(); + } + #endif /* mainCREATE_SIMPLE_BLINKY_DEMO_ONLY */ +} +/*-----------------------------------------------------------*/ + +void vAssertCalled( unsigned long ulLine, const char * const pcFileName ) +{ +static BaseType_t xPrinted = pdFALSE; +volatile uint32_t ulSetToNonZeroInDebuggerToContinue = 0; + + /* Called if an assertion passed to configASSERT() fails. See + http://www.freertos.org/a00110.html#configASSERT for more information. */ + + /* Parameters are not used. */ + ( void ) ulLine; + ( void ) pcFileName; + + printf( "ASSERT! Line %ld, file %s\r\n", ulLine, pcFileName ); + + taskENTER_CRITICAL(); + { + /* You can step out of this function to debug the assertion by using + the debugger to set ulSetToNonZeroInDebuggerToContinue to a non-zero + value. */ + while( ulSetToNonZeroInDebuggerToContinue == 0 ) + { + __asm volatile( "NOP" ); + __asm volatile( "NOP" ); + } + } + taskEXIT_CRITICAL(); +} +/*-----------------------------------------------------------*/ diff --git a/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/main_blinky.c b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/main_blinky.c new file mode 100644 index 000000000..cf5b3965e --- /dev/null +++ b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/main_blinky.c @@ -0,0 +1,265 @@ +/* + * FreeRTOS Kernel V10.0.1 + * Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of + * this software and associated documentation files (the "Software"), to deal in + * the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of + * the Software, and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR + * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER + * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * http://www.FreeRTOS.org + * http://aws.amazon.com/freertos + * + * 1 tab == 4 spaces! + */ + +/****************************************************************************** + * NOTE 1: Windows will not be running the FreeRTOS demo threads continuously, so + * do not expect to get real time behaviour from the FreeRTOS Windows port, or + * this demo application. Also, the timing information in the FreeRTOS+Trace + * logs have no meaningful units. See the documentation page for the Windows + * port for further information: + * http://www.freertos.org/FreeRTOS-Windows-Simulator-Emulator-for-Visual-Studio-and-Eclipse-MingW.html + * + * NOTE 2: This project provides two demo applications. A simple blinky style + * project, and a more comprehensive test and demo application. The + * mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting in main.c is used to select + * between the two. See the notes on using mainCREATE_SIMPLE_BLINKY_DEMO_ONLY + * in main.c. This file implements the simply blinky version. Console output + * is used in place of the normal LED toggling. + * + * NOTE 3: This file only contains the source code that is specific to the + * basic demo. Generic functions, such FreeRTOS hook functions, are defined + * in main.c. + ****************************************************************************** + * + * main_blinky() creates one queue, one software timer, and two tasks. It then + * starts the scheduler. + * + * The Queue Send Task: + * The queue send task is implemented by the prvQueueSendTask() function in + * this file. It uses vTaskDelayUntil() to create a periodic task that sends + * the value 100 to the queue every 200 milliseconds (please read the notes + * above regarding the accuracy of timing under Windows). + * + * The Queue Send Software Timer: + * The timer is an auto-reload timer with a period of two seconds. The timer's + * callback function writes the value 200 to the queue. The callback function + * is implemented by prvQueueSendTimerCallback() within this file. + * + * The Queue Receive Task: + * The queue receive task is implemented by the prvQueueReceiveTask() function + * in this file. prvQueueReceiveTask() waits for data to arrive on the queue. + * When data is received, the task checks the value of the data, then outputs a + * message to indicate if the data came from the queue send task or the queue + * send software timer. + * + * Expected Behaviour: + * - The queue send task writes to the queue every 200ms, so every 200ms the + * queue receive task will output a message indicating that data was received + * on the queue from the queue send task. + * - The queue send software timer has a period of two seconds, and is reset + * each time a key is pressed. So if two seconds expire without a key being + * pressed then the queue receive task will output a message indicating that + * data was received on the queue from the queue send software timer. + * + * NOTE: Console input and output relies on Windows system calls, which can + * interfere with the execution of the FreeRTOS Windows port. This demo only + * uses Windows system call occasionally. Heavier use of Windows system calls + * can crash the port. + */ + +/* Standard includes. */ +#include + +/* Kernel includes. */ +#include "FreeRTOS.h" +#include "task.h" +#include "timers.h" +#include "semphr.h" + +/* Priorities at which the tasks are created. */ +#define mainQUEUE_RECEIVE_TASK_PRIORITY ( tskIDLE_PRIORITY + 2 ) +#define mainQUEUE_SEND_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 ) + +/* The rate at which data is sent to the queue. The times are converted from +milliseconds to ticks using the pdMS_TO_TICKS() macro. */ +#define mainTASK_SEND_FREQUENCY_MS pdMS_TO_TICKS( 200UL ) +#define mainTIMER_SEND_FREQUENCY_MS pdMS_TO_TICKS( 2000UL ) + +/* The number of items the queue can hold at once. */ +#define mainQUEUE_LENGTH ( 2 ) + +/* The values sent to the queue receive task from the queue send task and the +queue send software timer respectively. */ +#define mainVALUE_SENT_FROM_TASK ( 100UL ) +#define mainVALUE_SENT_FROM_TIMER ( 200UL ) + +/*-----------------------------------------------------------*/ + +/* + * The tasks as described in the comments at the top of this file. + */ +static void prvQueueReceiveTask( void *pvParameters ); +static void prvQueueSendTask( void *pvParameters ); + +/* + * The callback function executed when the software timer expires. + */ +static void prvQueueSendTimerCallback( TimerHandle_t xTimerHandle ); + +/*-----------------------------------------------------------*/ + +/* The queue used by both tasks. */ +static QueueHandle_t xQueue = NULL; + +/* A software timer that is started from the tick hook. */ +static TimerHandle_t xTimer = NULL; + +/*-----------------------------------------------------------*/ + +/*** SEE THE COMMENTS AT THE TOP OF THIS FILE ***/ +void main_blinky( void ) +{ +const TickType_t xTimerPeriod = mainTIMER_SEND_FREQUENCY_MS; + + /* Create the queue. */ + xQueue = xQueueCreate( mainQUEUE_LENGTH, sizeof( uint32_t ) ); + + if( xQueue != NULL ) + { + /* Start the two tasks as described in the comments at the top of this + file. */ + xTaskCreate( prvQueueReceiveTask, /* The function that implements the task. */ + "Rx", /* The text name assigned to the task - for debug only as it is not used by the kernel. */ + configMINIMAL_STACK_SIZE, /* The size of the stack to allocate to the task. */ + NULL, /* The parameter passed to the task - not used in this simple case. */ + mainQUEUE_RECEIVE_TASK_PRIORITY,/* The priority assigned to the task. */ + NULL ); /* The task handle is not required, so NULL is passed. */ + + xTaskCreate( prvQueueSendTask, "TX", configMINIMAL_STACK_SIZE, NULL, mainQUEUE_SEND_TASK_PRIORITY, NULL ); + + /* Create the software timer, but don't start it yet. */ + xTimer = xTimerCreate( "Timer", /* The text name assigned to the software timer - for debug only as it is not used by the kernel. */ + xTimerPeriod, /* The period of the software timer in ticks. */ + pdTRUE, /* xAutoReload is set to pdTRUE. */ + NULL, /* The timer's ID is not used. */ + prvQueueSendTimerCallback );/* The function executed when the timer expires. */ + + if( xTimer != NULL ) + { + xTimerStart( xTimer, 0 ); + } + + /* Start the tasks and timer running. */ + vTaskStartScheduler(); + } + + /* If all is well, the scheduler will now be running, and the following + line will never be reached. If the following line does execute, then + there was insufficient FreeRTOS heap memory available for the idle and/or + timer tasks to be created. See the memory management section on the + FreeRTOS web site for more details. */ + for( ;; ); +} +/*-----------------------------------------------------------*/ + +static void prvQueueSendTask( void *pvParameters ) +{ +TickType_t xNextWakeTime; +const TickType_t xBlockTime = mainTASK_SEND_FREQUENCY_MS; +const uint32_t ulValueToSend = mainVALUE_SENT_FROM_TASK; + + /* Prevent the compiler warning about the unused parameter. */ + ( void ) pvParameters; + + /* Initialise xNextWakeTime - this only needs to be done once. */ + xNextWakeTime = xTaskGetTickCount(); + + for( ;; ) + { + /* Place this task in the blocked state until it is time to run again. + The block time is specified in ticks, pdMS_TO_TICKS() was used to + convert a time specified in milliseconds into a time specified in ticks. + While in the Blocked state this task will not consume any CPU time. */ + vTaskDelayUntil( &xNextWakeTime, xBlockTime ); + + /* Send to the queue - causing the queue receive task to unblock and + write to the console. 0 is used as the block time so the send operation + will not block - it shouldn't need to block as the queue should always + have at least one space at this point in the code. */ + xQueueSend( xQueue, &ulValueToSend, 0U ); + } +} +/*-----------------------------------------------------------*/ + +static void prvQueueSendTimerCallback( TimerHandle_t xTimerHandle ) +{ +const uint32_t ulValueToSend = mainVALUE_SENT_FROM_TIMER; + + /* This is the software timer callback function. The software timer has a + period of two seconds and is reset each time a key is pressed. This + callback function will execute if the timer expires, which will only happen + if a key is not pressed for two seconds. */ + + /* Avoid compiler warnings resulting from the unused parameter. */ + ( void ) xTimerHandle; + + /* Send to the queue - causing the queue receive task to unblock and + write out a message. This function is called from the timer/daemon task, so + must not block. Hence the block time is set to 0. */ + xQueueSend( xQueue, &ulValueToSend, 0U ); +} +/*-----------------------------------------------------------*/ + +static void prvQueueReceiveTask( void *pvParameters ) +{ +uint32_t ulReceivedValue; + + /* Prevent the compiler warning about the unused parameter. */ + ( void ) pvParameters; + + for( ;; ) + { + /* Wait until something arrives in the queue - this task will block + indefinitely provided INCLUDE_vTaskSuspend is set to 1 in + FreeRTOSConfig.h. It will not use any CPU time while it is in the + Blocked state. */ + xQueueReceive( xQueue, &ulReceivedValue, portMAX_DELAY ); + + /* To get here something must have been received from the queue, but + is it an expected value? Normally calling printf() from a task is not + a good idea. Here there is lots of stack space and only one task is + using console IO so it is ok. However, note the comments at the top of + this file about the risks of making Windows system calls (such as + console output) from a FreeRTOS task. */ + if( ulReceivedValue == mainVALUE_SENT_FROM_TASK ) + { + printf( "Message received from task\r\n" ); + } + else if( ulReceivedValue == mainVALUE_SENT_FROM_TIMER ) + { + printf( "Message received from software timer\r\n" ); + } + else + { + printf( "Unexpected message\r\n" ); + } + + fflush( stdout ); + } +} +/*-----------------------------------------------------------*/ + diff --git a/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/main_full.c b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/main_full.c new file mode 100644 index 000000000..29d669b8d --- /dev/null +++ b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/main_full.c @@ -0,0 +1,437 @@ +/* + * FreeRTOS Kernel V10.0.1 + * Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of + * this software and associated documentation files (the "Software"), to deal in + * the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of + * the Software, and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR + * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER + * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * http://www.FreeRTOS.org + * http://aws.amazon.com/freertos + * + * 1 tab == 4 spaces! + */ + +/* + * main() creates all the demo application tasks, then starts the scheduler. + * The web documentation provides more details of the standard demo application + * tasks, which provide no particular functionality but do provide a good + * example of how to use the FreeRTOS API. + * + * In addition to the standard demo tasks, the following tasks and tests are + * defined and/or created within this file: + * + * "Check" task - This only executes every five seconds but has a high priority + * to ensure it gets processor time. Its main function is to check that all the + * standard demo tasks are still operational. While no errors have been + * discovered the check task will print out "OK" and the current simulated tick + * time. If an error is discovered in the execution of a task then the check + * task will print out an appropriate error message. + * + */ + + +/* Standard includes. */ +#include +#include + +/* Kernel includes. */ +#include +#include +#include +#include +#include + +/* Standard demo includes. */ +#include "BlockQ.h" +#include "integer.h" +#include "semtest.h" +#include "PollQ.h" +#include "GenQTest.h" +#include "QPeek.h" +#include "recmutex.h" +#include "flop.h" +#include "TimerDemo.h" +#include "countsem.h" +#include "death.h" +#include "QueueSet.h" +#include "QueueOverwrite.h" +#include "EventGroupsDemo.h" +#include "IntSemTest.h" +#include "TaskNotify.h" +#include "QueueSetPolling.h" +#include "StaticAllocation.h" +#include "blocktim.h" +#include "AbortDelay.h" +#include "MessageBufferDemo.h" +#include "StreamBufferDemo.h" +#include "StreamBufferInterrupt.h" + +/* Priorities at which the tasks are created. */ +#define mainCHECK_TASK_PRIORITY ( configMAX_PRIORITIES - 2 ) +#define mainQUEUE_POLL_PRIORITY ( tskIDLE_PRIORITY + 1 ) +#define mainSEM_TEST_PRIORITY ( tskIDLE_PRIORITY + 1 ) +#define mainBLOCK_Q_PRIORITY ( tskIDLE_PRIORITY + 2 ) +#define mainCREATOR_TASK_PRIORITY ( tskIDLE_PRIORITY + 3 ) +#define mainFLASH_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 ) +#define mainINTEGER_TASK_PRIORITY ( tskIDLE_PRIORITY ) +#define mainGEN_QUEUE_TASK_PRIORITY ( tskIDLE_PRIORITY ) +#define mainFLOP_TASK_PRIORITY ( tskIDLE_PRIORITY ) +#define mainQUEUE_OVERWRITE_PRIORITY ( tskIDLE_PRIORITY ) + +#define mainTIMER_TEST_PERIOD ( 50 ) + +/* Parameters that are passed into the register check tasks solely for the +purpose of ensuring parameters are passed into tasks correctly. */ +#define mainREG_TEST_TASK_1_PARAMETER ( ( void * ) 0x12345678 ) +#define mainREG_TEST_TASK_2_PARAMETER ( ( void * ) 0x87654321 ) + +/* Whether or not to enable interrupt queue tests. */ +#define mainENABLE_INT_QUEUE_TESTS ( 0 ) + +/* The task that periodically checks that all the standard demo tasks are + * still executing and error free. + */ +static void prvCheckTask( void *pvParameters ); + +/* Tasks that implement register tests. */ +static void prvRegTest1Task( void *pvParameters ); +static void prvRegTest2Task( void *pvParameters ); + +/* Functions implemented in assembly file regtest_xtensa.S. */ +extern void vRegTest1( void ); +extern void vRegTest2( void ); +/*-----------------------------------------------------------*/ + +/* The variable into which error messages are latched. */ +static char *pcStatusMessage = "No errors"; + +/* The following two variables are used to communicate the status of the +register check tasks to the check task. If the variables keep incrementing, +then the register check tasks have not discovered any errors. If a variable +stops incrementing, then an error has been found. */ +volatile unsigned long ulRegTest1Counter = 0UL, ulRegTest2Counter = 0UL; + +/* The following variable is used to communicate whether the timers for the +IntQueue tests have been Initialized. This is needed to ensure that the queues +are accessed from the tick hook only after they have been created in the +interrupt queue test. */ +volatile BaseType_t xTimerForQueueTestInitialized = pdFALSE; +/*-----------------------------------------------------------*/ + +int main_full( void ) +{ + /* Start the check task as described at the top of this file. */ + xTaskCreate( prvCheckTask, "Check", configMINIMAL_STACK_SIZE, NULL, mainCHECK_TASK_PRIORITY, NULL ); + + #if( mainENABLE_INT_QUEUE_TESTS == 0 ) + { + /* Create the standard demo tasks. */ + vStartTaskNotifyTask(); + vStartBlockingQueueTasks( mainBLOCK_Q_PRIORITY ); + vStartSemaphoreTasks( mainSEM_TEST_PRIORITY ); + vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY ); + vStartIntegerMathTasks( mainINTEGER_TASK_PRIORITY ); + vStartGenericQueueTasks( mainGEN_QUEUE_TASK_PRIORITY ); + + vStartQueuePeekTasks(); + vStartMathTasks( mainFLOP_TASK_PRIORITY ); + vStartRecursiveMutexTasks(); + vStartCountingSemaphoreTasks(); + vStartQueueSetTasks(); + + vStartQueueOverwriteTask( mainQUEUE_OVERWRITE_PRIORITY ); + vStartEventGroupTasks(); + vStartInterruptSemaphoreTasks(); + vStartQueueSetPollingTask(); + vCreateBlockTimeTasks(); + + #if( configUSE_PREEMPTION != 0 ) + { + /* Don't expect these tasks to pass when preemption is not used. */ + vStartTimerDemoTask( mainTIMER_TEST_PERIOD ); + } + #endif + + vCreateAbortDelayTasks(); + vStartMessageBufferTasks( configMINIMAL_STACK_SIZE ); + + vStartStreamBufferTasks(); + vStartStreamBufferInterruptDemo(); + + /* Create the register check tasks, as described at the top of this file */ + xTaskCreate( prvRegTest1Task, "Reg1", configMINIMAL_STACK_SIZE, mainREG_TEST_TASK_1_PARAMETER, tskIDLE_PRIORITY, NULL ); + xTaskCreate( prvRegTest2Task, "Reg2", configMINIMAL_STACK_SIZE, mainREG_TEST_TASK_2_PARAMETER, tskIDLE_PRIORITY, NULL ); + + /* The suicide tasks must be created last as they need to know how many + tasks were running prior to their creation. This then allows them to + ascertain whether or not the correct/expected number of tasks are running at + any given time. */ + vCreateSuicidalTasks( mainCREATOR_TASK_PRIORITY ); + } + #else /* mainENABLE_INT_QUEUE_TESTS */ + { + /* Start interrupt queue test tasks. */ + vStartInterruptQueueTasks(); + } + #endif /* mainENABLE_INT_QUEUE_TESTS */ + + /* Start the scheduler itself. */ + vTaskStartScheduler(); + + /* Should never get here unless there was not enough heap space to create + the idle and other system tasks. */ + return 0; +} +/*-----------------------------------------------------------*/ + +static void prvCheckTask( void *pvParameters ) +{ +TickType_t xNextWakeTime; +const TickType_t xCycleFrequency = pdMS_TO_TICKS( 5000UL ); +static unsigned long ulLastRegTest1Value = 0, ulLastRegTest2Value = 0; + + /* Just to remove compiler warning. */ + ( void ) pvParameters; + + /* Initialise xNextWakeTime - this only needs to be done once. */ + xNextWakeTime = xTaskGetTickCount(); + + for( ;; ) + { + /* Place this task in the blocked state until it is time to run again. */ + vTaskDelayUntil( &xNextWakeTime, xCycleFrequency ); + + #if( mainENABLE_INT_QUEUE_TESTS == 0 ) + { + /* Check the standard demo tasks are running without error. */ + #if( configUSE_PREEMPTION != 0 ) + { + /* These tasks are only created when preemption is used. */ + if( xAreTimerDemoTasksStillRunning( xCycleFrequency ) != pdTRUE ) + { + pcStatusMessage = "Error: TimerDemo"; + } + } + #endif + + if( xAreTaskNotificationTasksStillRunning() != pdTRUE ) + { + pcStatusMessage = "Error: Notification"; + } + else if( xAreBlockingQueuesStillRunning() != pdTRUE ) + { + pcStatusMessage = "Error: BlockQueue"; + } + else if( xAreSemaphoreTasksStillRunning() != pdTRUE ) + { + pcStatusMessage = "Error: SemTest"; + } + else if( xArePollingQueuesStillRunning() != pdTRUE ) + { + pcStatusMessage = "Error: PollQueue"; + } + else if( xAreIntegerMathsTaskStillRunning() != pdTRUE ) + { + pcStatusMessage = "Error: IntMath"; + } + else if( xAreGenericQueueTasksStillRunning() != pdTRUE ) + { + pcStatusMessage = "Error: GenQueue"; + } + else if( xAreQueuePeekTasksStillRunning() != pdTRUE ) + { + pcStatusMessage = "Error: QueuePeek"; + } + else if( xAreMathsTaskStillRunning() != pdPASS ) + { + pcStatusMessage = "Error: Flop"; + } + else if( xAreRecursiveMutexTasksStillRunning() != pdTRUE ) + { + pcStatusMessage = "Error: RecMutex"; + } + else if( xAreCountingSemaphoreTasksStillRunning() != pdTRUE ) + { + pcStatusMessage = "Error: CountSem"; + } + else if( xAreQueueSetTasksStillRunning() != pdPASS ) + { + pcStatusMessage = "Error: Queue set"; + } + else if( xIsQueueOverwriteTaskStillRunning() != pdPASS ) + { + pcStatusMessage = "Error: Queue overwrite"; + } + else if( xAreEventGroupTasksStillRunning() != pdTRUE ) + { + pcStatusMessage = "Error: EventGroup"; + } + else if( xAreInterruptSemaphoreTasksStillRunning() != pdTRUE ) + { + pcStatusMessage = "Error: IntSem"; + } + else if( xAreQueueSetPollTasksStillRunning() != pdPASS ) + { + pcStatusMessage = "Error: Queue set polling"; + } + else if( xAreBlockTimeTestTasksStillRunning() != pdPASS ) + { + pcStatusMessage = "Error: Block time"; + } + else if( xAreAbortDelayTestTasksStillRunning() != pdPASS ) + { + pcStatusMessage = "Error: Abort delay"; + } + else if( xAreMessageBufferTasksStillRunning() != pdTRUE ) + { + pcStatusMessage = "Error: MessageBuffer"; + } + else if( xAreStreamBufferTasksStillRunning() != pdTRUE ) + { + pcStatusMessage = "Error: StreamBuffer"; + } + else if( xIsInterruptStreamBufferDemoStillRunning() != pdPASS ) + { + pcStatusMessage = "Error: Stream buffer interrupt"; + } + else if( xIsCreateTaskStillRunning() != pdTRUE ) + { + pcStatusMessage = "Error: Death"; + } + else if( ulLastRegTest1Value == ulRegTest1Counter ) + { + pcStatusMessage = "Error: Reg Test 1"; + } + else if( ulLastRegTest2Value == ulRegTest2Counter ) + { + pcStatusMessage = "Error: Reg Test 2"; + } + + /* Update register test counters. */ + ulLastRegTest1Value = ulRegTest1Counter; + ulLastRegTest2Value = ulRegTest2Counter; + } + #else /* mainENABLE_INT_QUEUE_TESTS */ + { + if( xAreIntQueueTasksStillRunning() != pdTRUE ) + { + pcStatusMessage = "Error: IntQueue"; + } + } + #endif /* mainENABLE_INT_QUEUE_TESTS */ + + /* This is the only task that uses stdout so its ok to call printf() + directly. */ + printf( "%s - tick count %zu - free heap %zu - min free heap %zu\r\n", pcStatusMessage, + xTaskGetTickCount(), + xPortGetFreeHeapSize(), + xPortGetMinimumEverFreeHeapSize() ); + } +} +/*-----------------------------------------------------------*/ + +/* Called by vApplicationTickHook(), which is defined in main.c. */ +void vFullDemoTickHookFunction( void ) +{ +TaskHandle_t xTimerTask; + + #if( mainENABLE_INT_QUEUE_TESTS == 0 ) + { + /* Exercise using task notifications from an interrupt. */ + xNotifyTaskFromISR(); + + /* Write to a queue that is in use as part of the queue set demo to + * demonstrate using queue sets from an ISR. */ + vQueueSetAccessQueueSetFromISR(); + + /* Call the periodic queue overwrite from ISR demo. */ + vQueueOverwritePeriodicISRDemo(); + + /* Exercise event groups from interrupts. */ + vPeriodicEventGroupsProcessing(); + + /* Exercise giving mutexes from an interrupt. */ + vInterruptSemaphorePeriodicTest(); + + /* Queue set access from interrupt. */ + vQueueSetPollingInterruptAccess(); + + /* Call the periodic timer test, which tests the timer API functions that + can be called from an ISR. */ + #if( configUSE_PREEMPTION != 0 ) + { + /* Only created when preemption is used. */ + vTimerPeriodicISRTests(); + } + #endif + + /* Writes to stream buffer byte by byte to test the stream buffer trigger + level functionality. */ + vPeriodicStreamBufferProcessing(); + + /* Writes a string to a string buffer four bytes at a time to demonstrate + a stream being sent from an interrupt to a task. */ + vBasicStreamBufferSendFromISR(); + } + #else /* mainENABLE_INT_QUEUE_TESTS */ + { + /* Access queues from interrupt. Make sure to access after the queues have + been created. */ + if( xTimerForQueueTestInitialized == pdTRUE ) + { + portYIELD_FROM_ISR( xFirstTimerHandler() ); + } + } + #endif /* mainENABLE_INT_QUEUE_TESTS */ +} +/*-----------------------------------------------------------*/ + +static void prvRegTest1Task( void *pvParameters ) +{ + /* Although the regtest task is written in assembly, its entry point is + written in C for convenience of checking the task parameter is being passed + in correctly. */ + if( pvParameters == mainREG_TEST_TASK_1_PARAMETER ) + { + /* Start the part of the test that is written in assembly. */ + vRegTest1(); + } + + /* The following line will only execute if the task parameter is found to + be incorrect. The check task will detect that the regtest loop counter is + not being incremented and flag an error. */ + vTaskDelete( NULL ); +} +/*-----------------------------------------------------------*/ + +static void prvRegTest2Task( void *pvParameters ) +{ + /* Although the regtest task is written in assembly, its entry point is + written in C for convenience of checking the task parameter is being passed + in correctly. */ + if( pvParameters == mainREG_TEST_TASK_2_PARAMETER ) + { + /* Start the part of the test that is written in assembly. */ + vRegTest2(); + } + + /* The following line will only execute if the task parameter is found to + be incorrect. The check task will detect that the regtest loop counter is + not being incremented and flag an error. */ + vTaskDelete( NULL ); +} +/*-----------------------------------------------------------*/ diff --git a/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/regtest_xtensa.S b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/regtest_xtensa.S new file mode 100644 index 000000000..a587a322c --- /dev/null +++ b/FreeRTOS/Demo/Tensilica_Simulator_Xplorer_XCC/regtest_xtensa.S @@ -0,0 +1,219 @@ +/* + * FreeRTOS Kernel V10.0.1 + * Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of + * this software and associated documentation files (the "Software"), to deal in + * the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of + * the Software, and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR + * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER + * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * http://www.FreeRTOS.org + * http://aws.amazon.com/freertos + * + * 1 tab == 4 spaces! + */ + +#include "FreeRTOSConfig.h" +//#include "ISR_Support.h" + + .extern ulRegTest1Counter + .extern ulRegTest2Counter + .extern vPortYield + + .global vRegTest1 + .global vRegTest2 + + .text + .align 4 + + +/*-----------------------------------------------------------*/ + +vRegTest1: + + /* Set initial values into the general purpose registers. */ + /* a0 = return address, a1 = stack pointer. */ +#ifdef __XTENSA_WINDOWED_ABI__ + entry a1, 64 + s32i a0, a1, 0 /* Save return address */ +#else + addi a1, a1, -64 + s32i a0, a1, 0 /* Save return address */ + s32i a12, a1, 4 /* Save callee-saved regs if call0 ABI */ + s32i a13, a1, 8 + s32i a14, a1, 12 + s32i a15, a1, 16 +#endif + movi a2, 0x11111111 + movi a3, 0x22222222 + movi a4, 0x33333333 + movi a5, 0x44444444 + movi a6, 0x55555555 + movi a7, 0x66666666 + movi a8, 0x77777777 + movi a9, 0x88888888 + movi a10, 0x99999999 + movi a11, 0xaaaaaaaa + movi a12, 0xbbbbbbbb + movi a13, 0xcccccccc + movi a14, 0xdddddddd + movi a15, 0xeeeeeeee + +_RegTest1Loop: + + /* Loop checking the values originally loaded into the general purpose + registers remain through the life of the task. */ + movi a0, 0x11111111 + bne a0, a2, _RegTest1Error + movi a0, 0x22222222 + bne a0, a3, _RegTest1Error + movi a0, 0x33333333 + bne a0, a4, _RegTest1Error + movi a0, 0x44444444 + bne a0, a5, _RegTest1Error + movi a0, 0x55555555 + bne a0, a6, _RegTest1Error + movi a0, 0x66666666 + bne a0, a7, _RegTest1Error + movi a0, 0x77777777 + bne a0, a8, _RegTest1Error + movi a0, 0x88888888 + bne a0, a9, _RegTest1Error + movi a0, 0x99999999 + bne a0, a10, _RegTest1Error + movi a0, 0xaaaaaaaa + bne a0, a11, _RegTest1Error + movi a0, 0xbbbbbbbb + bne a0, a12, _RegTest1Error + movi a0, 0xcccccccc + bne a0, a13, _RegTest1Error + movi a0, 0xdddddddd + bne a0, a14, _RegTest1Error + movi a0, 0xeeeeeeee + bne a0, a15, _RegTest1Error + + /* Incrememnt the loop counter to prove this task has not gone into the + error null loop. */ + s32i a2, a1, 20 + movi a2, ulRegTest1Counter + l32i a0, a2, 0 + addi a0, a0, 1 + s32i a0, a2, 0 + l32i a2, a1, 20 + + /* Loop again. */ + j _RegTest1Loop + +_RegTest1Error: +.L1: + j .L1 + + + .align 4 + +/*-----------------------------------------------------------*/ + +vRegTest2: + + /* Set initial values into the general purpose registers. */ + /* a0 = return address, a1 = stack pointer. */ +#ifdef __XTENSA_WINDOWED_ABI__ + entry a1, 64 + s32i a0, a1, 0 /* Save return address */ +#else + addi a1, a1, -64 + s32i a0, a1, 0 /* Save return address */ + s32i a12, a1, 4 /* Save callee-saved regs if call0 ABI */ + s32i a13, a1, 8 + s32i a14, a1, 12 + s32i a15, a1, 16 +#endif + +_ReInit: + + movi a2, 0x01010101 + movi a3, 0x02020202 + movi a4, 0x03030303 + movi a5, 0x04040404 + movi a6, 0x05050505 + movi a7, 0x06060606 + movi a8, 0x07070707 + movi a9, 0x08080808 + movi a10, 0x09090909 + movi a11, 0x0a0a0a0a + movi a12, 0x0b0b0b0b + movi a13, 0x0c0c0c0c + movi a14, 0x0d0d0d0d + movi a15, 0x0e0e0e0e + +_RegTest2Loop: + + /* Loop checking the values originally loaded into the general purpose + registers remain through the life of the task. */ + movi a0, 0x01010101 + bne a0, a2, _RegTest1Error + movi a0, 0x02020202 + bne a0, a3, _RegTest1Error + movi a0, 0x03030303 + bne a0, a4, _RegTest1Error + movi a0, 0x04040404 + bne a0, a5, _RegTest1Error + movi a0, 0x05050505 + bne a0, a6, _RegTest1Error + movi a0, 0x06060606 + bne a0, a7, _RegTest1Error + movi a0, 0x07070707 + bne a0, a8, _RegTest1Error + movi a0, 0x08080808 + bne a0, a9, _RegTest1Error + movi a0, 0x09090909 + bne a0, a10, _RegTest1Error + movi a0, 0x0a0a0a0a + bne a0, a11, _RegTest1Error + movi a0, 0x0b0b0b0b + bne a0, a12, _RegTest1Error + movi a0, 0x0c0c0c0c + bne a0, a13, _RegTest1Error + movi a0, 0x0d0d0d0d + bne a0, a14, _RegTest1Error + movi a0, 0x0e0e0e0e + bne a0, a15, _RegTest1Error + + /* Force a yield from one of the reg test tasks to increase coverage. */ + /* IMPORTANT: this call will trash some number of registers. Branch */ + /* to _ReInit to set things up again. */ +#ifdef __XTENSA_WINDOWED_ABI__ + call8 vPortYield +#else + call0 vPortYield +#endif + + /* Increment the loop counter to prove this task has not gone into the + error null loop. */ + s32i a2, a1, 20 + movi a2, ulRegTest2Counter + l32i a0, a2, 0 + addi a0, a0, 1 + s32i a0, a2, 0 + l32i a2, a1, 20 + + /* Loop again. */ + j _ReInit /* See comments above */ + /* j _RegTest2Loop */ + +_RegTest2Error: +.L2: + j .L2 + diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/Makefile b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/Makefile new file mode 100644 index 000000000..6a0d3b061 --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/Makefile @@ -0,0 +1,98 @@ +### Makefile to build the FreeRTOS library ### + +# Build target (options: sim, board) + +TARGET = sim +SMALL = + +# Tools + +CC = xt-xcc +AS = xt-xcc +AR = xt-ar +XT_CORE = $(patsubst %-params,%,$(notdir $(shell xt-xcc --show-config=core))) +CONFIGDIR = $(shell xt-xcc --show-config=config) + +# For platform-specific commands + +include $(CONFIGDIR)/misc/hostenv.mk + +# Source code and build locations + +SRCROOT = $(subst /,$(S),$(CURDIR)) +TSTROOT = $(abspath $(SRCROOT)$(S)..$(S)..$(S)..$(S)..$(S)..$(S)demos$(S)cadence$(S)sim$(SMALL)) +BLDROOT = $(TSTROOT)$(S)build +BLDDIR = $(BLDROOT)$(S)$(XT_CORE) + +FR_SRCDIR = $(abspath $(SRCROOT)$(S)..$(S)..$(S)..) +FR_SRCDIR2 = $(FR_SRCDIR)$(S)portable$(S)MemMang +XT_SRCDIR = $(SRCROOT) + +vpath %.c $(FR_SRCDIR) $(FR_SRCDIR2) $(XT_SRCDIR) +vpath %.S $(XT_SRCDIR) + +# File lists + +FR_C_FILES = $(notdir $(wildcard $(FR_SRCDIR)/*.c)) $(notdir $(wildcard $(FR_SRCDIR2)/*.c)) +XT_C_FILES = $(notdir $(wildcard $(XT_SRCDIR)/*.c)) +XT_S_FILES = $(notdir $(wildcard $(XT_SRCDIR)/*.S)) + +# List of all .o files that will go into the library + +LIB_C_O = $(patsubst %.c,%.o,$(XT_C_FILES) $(FR_C_FILES)) +LIB_S_O = $(patsubst %.S,%.o,$(XT_S_FILES)) +LIB_O_LIST = $(addprefix $(BLDDIR)/,$(LIB_C_O) $(LIB_S_O)) + +# Output files + +OSLIB = $(BLDDIR)$(S)libfreertos.a + +# Build options + +ifeq ($(TARGET),sim) +DFLAGS = -DXT_SIMULATOR +endif +ifeq ($(TARGET),board) +DFLAGS = -DXT_BOARD +endif + +IFLAGS = \ + -I$(FR_SRCDIR)$(S)..$(S)include -I$(FR_SRCDIR)$(S)..$(S)include$(S)private \ + -I$(XT_SRCDIR) -I$(TSTROOT)$(S)common$(S)config_files -I$(BLDDIR) + +CFLAGS = -O2 -g +CCFLAGS = $(CFLAGS) -Wall -mno-coproc -mlongcalls -ffunction-sections -mno-l32r-flix $(DFLAGS) +ASFLAGS = $(CCFLAGS) + +# Include dependency rules (generated using -MD) + +-include $(wildcard $(BLDDIR)/*.d) + +# Targets + +all : mkdir $(OSLIB) + +mkdir : $(BLDDIR)/.mkdir + +$(BLDDIR)/.mkdir : + @$(MKPATH) $(BLDDIR) + @echo "" > $@ + -$(CP) $(CONFIGDIR)/xtensa-elf/include/sys/reent.h $(BLDDIR)/reent.h + +$(OSLIB) : $(LIB_O_LIST) + $(AR) -rs $@ $^ + +$(BLDDIR)/%.o : %.c + $(CC) $(CCFLAGS) $(IFLAGS) -MD -MF $(subst .o,.d,$@) -c -o $@ $< + +$(BLDDIR)/%.o : %.S + $(CC) $(ASFLAGS) $(IFLAGS) -MD -MF $(subst .o,.d,$@) -c -o $@ $< + +clean : + $(RM_R) $(BLDDIR) + +clean_all : + $(RM_R) $(BLDROOT) + +.PHONY : all mkdir clean clean_all + diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/port.c b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/port.c new file mode 100644 index 000000000..6bda80423 --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/port.c @@ -0,0 +1,261 @@ +/* + FreeRTOS V9.0.0 - Copyright (C) 2016 Real Time Engineers Ltd. + All rights reserved + + VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. + + This file is part of the FreeRTOS distribution. + + FreeRTOS is free software; you can redistribute it and/or modify it under + the terms of the GNU General Public License (version 2) as published by the + Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception. + + *************************************************************************** + >>! NOTE: The modification to the GPL is included to allow you to !<< + >>! distribute a combined work that includes FreeRTOS without being !<< + >>! obliged to provide the source code for proprietary components !<< + >>! outside of the FreeRTOS kernel. !<< + *************************************************************************** + + FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + FOR A PARTICULAR PURPOSE. Full license text is available on the following + link: http://www.freertos.org/a00114.html + + *************************************************************************** + * * + * FreeRTOS provides completely free yet professionally developed, * + * robust, strictly quality controlled, supported, and cross * + * platform software that is more than just the market leader, it * + * is the industry's de facto standard. * + * * + * Help yourself get started quickly while simultaneously helping * + * to support the FreeRTOS project by purchasing a FreeRTOS * + * tutorial book, reference manual, or both: * + * http://www.FreeRTOS.org/Documentation * + * * + *************************************************************************** + + http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading + the FAQ page "My application does not run, what could be wrong?". Have you + defined configASSERT()? + + http://www.FreeRTOS.org/support - In return for receiving this top quality + embedded software for free we request you assist our global community by + participating in the support forum. + + http://www.FreeRTOS.org/training - Investing in training allows your team to + be as productive as possible as early as possible. Now you can receive + FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers + Ltd, and the world's leading authority on the world's leading RTOS. + + http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, + including FreeRTOS+Trace - an indispensable productivity tool, a DOS + compatible FAT file system, and our tiny thread aware UDP/IP stack. + + http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate. + Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS. + + http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High + Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS + licenses offer ticketed support, indemnification and commercial middleware. + + http://www.SafeRTOS.com - High Integrity Systems also provide a safety + engineered and independently SIL3 certified version for use in safety and + mission critical applications that require provable dependability. + + 1 tab == 4 spaces! +*/ + +/******************************************************************************* +// Copyright (c) 2003-2015 Cadence Design Systems, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining +// a copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to +// permit persons to whom the Software is furnished to do so, subject to +// the following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +-------------------------------------------------------------------------------- +*/ + +#include +#include + +#include "xtensa_rtos.h" + +#include "FreeRTOS.h" +#include "task.h" + + +/* Defined in portasm.h */ +extern void _frxt_tick_timer_init(void); + +/* Defined in xtensa_context.S */ +extern void _xt_coproc_init(void); +/*-----------------------------------------------------------*/ + +/* We require the address of the pxCurrentTCB variable, but don't want to know +any details of its type. */ +typedef void TCB_t; +extern volatile TCB_t * volatile pxCurrentTCB; + +unsigned port_xSchedulerRunning = 0; // Duplicate of inaccessible xSchedulerRunning; needed at startup to avoid counting nesting +unsigned port_interruptNesting = 0; // Interrupt nesting level + +/*-----------------------------------------------------------*/ + +// User exception dispatcher when exiting +void _xt_user_exit(void); + +/* + * Stack initialization + */ +#if portUSING_MPU_WRAPPERS +StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters, BaseType_t xRunPrivileged ) +#else +StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters ) +#endif +{ + StackType_t *sp, *tp; + XtExcFrame *frame; + #if XCHAL_CP_NUM > 0 + uint32_t *p; + #endif + + /* Create interrupt stack frame aligned to 16 byte boundary */ + sp = (StackType_t *) (((UBaseType_t)(pxTopOfStack + 1) - XT_CP_SIZE - XT_STK_FRMSZ) & ~0xf); + + /* Clear the entire frame (do not use memset() because we don't depend on C library) */ + for (tp = sp; tp <= pxTopOfStack; ++tp) + *tp = 0; + + frame = (XtExcFrame *) sp; + + /* Explicitly initialize certain saved registers */ + frame->pc = (UBaseType_t) pxCode; /* task entrypoint */ + frame->a0 = 0; /* to terminate GDB backtrace */ + frame->a1 = (UBaseType_t) sp + XT_STK_FRMSZ; /* physical top of stack frame */ + frame->exit = (UBaseType_t) _xt_user_exit; /* user exception exit dispatcher */ + + /* Set initial PS to int level 0, EXCM disabled ('rfe' will enable), user mode. */ + /* Also set entry point argument parameter. */ + #ifdef __XTENSA_CALL0_ABI__ + frame->a2 = (UBaseType_t) pvParameters; + frame->ps = PS_UM | PS_EXCM; + #else + /* + for windowed ABI also set WOE and CALLINC (pretend task was 'call4'd). */ + frame->a6 = (UBaseType_t) pvParameters; + frame->ps = PS_UM | PS_EXCM | PS_WOE | PS_CALLINC(1); + #endif + + #ifdef XT_USE_SWPRI + /* Set the initial virtual priority mask value to all 1's. */ + frame->vpri = 0xFFFFFFFF; + #endif + + #if XCHAL_CP_NUM > 0 + /* Init the coprocessor save area (see xtensa_context.h) */ + /* No access to TCB here, so derive indirectly. Stack growth is top to bottom. + * //p = (uint32_t *) xMPUSettings->coproc_area; + */ + p = (uint32_t *)(((uint32_t) pxTopOfStack - XT_CP_SIZE) & ~0xf); + p[0] = 0; + p[1] = 0; + p[2] = (((uint32_t) p) + 12 + XCHAL_TOTAL_SA_ALIGN - 1) & -XCHAL_TOTAL_SA_ALIGN; + #endif + + return sp; +} + +/*-----------------------------------------------------------*/ + +void vPortEndScheduler( void ) +{ + /* It is unlikely that the Xtensa port will get stopped. If required simply + disable the tick interrupt here. */ +} + +/*-----------------------------------------------------------*/ + +BaseType_t xPortStartScheduler( void ) +{ + // Interrupts are disabled at this point and stack contains PS with enabled interrupts when task context is restored + + #if XCHAL_CP_NUM > 0 + /* Initialize co-processor management for tasks. Leave CPENABLE alone. */ + _xt_coproc_init(); + #endif + + /* Init the tick divisor value */ + _xt_tick_divisor_init(); + + /* Setup the hardware to generate the tick. */ + _frxt_tick_timer_init(); + + #if XT_USE_THREAD_SAFE_CLIB + // Init C library + vPortClibInit(); + #endif + + port_xSchedulerRunning = 1; + + // Cannot be directly called from C; never returns + __asm__ volatile ("call0 _frxt_dispatch\n"); + + /* Should not get here. */ + return pdTRUE; +} +/*-----------------------------------------------------------*/ + +BaseType_t xPortSysTickHandler( void ) +{ + BaseType_t ret; + unsigned interruptMask; + + portbenchmarkIntLatency(); + + /* Interrupts upto configMAX_SYSCALL_INTERRUPT_PRIORITY must be + * disabled before calling xTaskIncrementTick as it access the + * kernel lists. */ + interruptMask = portSET_INTERRUPT_MASK_FROM_ISR(); + { + ret = xTaskIncrementTick(); + } + portCLEAR_INTERRUPT_MASK_FROM_ISR( interruptMask ); + + portYIELD_FROM_ISR( ret ); + + return ret; +} +/*-----------------------------------------------------------*/ + +/* + * Used to set coprocessor area in stack. Current hack is to reuse MPU pointer for coprocessor area. + */ +#if portUSING_MPU_WRAPPERS +void vPortStoreTaskMPUSettings( xMPU_SETTINGS *xMPUSettings, const struct xMEMORY_REGION * const xRegions, StackType_t *pxBottomOfStack, uint32_t ulStackDepth ) +{ + #if XCHAL_CP_NUM > 0 + xMPUSettings->coproc_area = (StackType_t*)((((uint32_t)(pxBottomOfStack + ulStackDepth - 1)) - XT_CP_SIZE ) & ~0xf); + + + /* NOTE: we cannot initialize the coprocessor save area here because FreeRTOS is going to + * clear the stack area after we return. This is done in pxPortInitialiseStack(). + */ + #endif +} +#endif +/*-----------------------------------------------------------*/ diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portasm.S b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portasm.S new file mode 100644 index 000000000..f61544022 --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portasm.S @@ -0,0 +1,597 @@ +/* +//----------------------------------------------------------------------------- +// Copyright (c) 2003-2015 Cadence Design Systems, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining +// a copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to +// permit persons to whom the Software is furnished to do so, subject to +// the following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +//----------------------------------------------------------------------------- +*/ + +#include "xtensa_rtos.h" + +#define TOPOFSTACK_OFFS 0x00 /* StackType_t *pxTopOfStack */ +#define CP_TOPOFSTACK_OFFS 0x04 /* xMPU_SETTINGS.coproc_area */ + +.extern pxCurrentTCB + + +/* +******************************************************************************* +* Interrupt stack. The size of the interrupt stack is determined by the config +* parameter "configISR_STACK_SIZE" in FreeRTOSConfig.h +******************************************************************************* +*/ + .data + .align 16 + .global port_IntStack +port_IntStack: + .space configISR_STACK_SIZE +port_IntStackTop: + .word 0 +port_switch_flag: + .word 0 + + .text +/* +******************************************************************************* +* _frxt_setup_switch +* void _frxt_setup_switch(void); +* +* Sets an internal flag indicating that a task switch is required on return +* from interrupt handling. +* +******************************************************************************* +*/ + .global _frxt_setup_switch + .type _frxt_setup_switch,@function + .align 4 +_frxt_setup_switch: + + ENTRY(16) + + movi a2, port_switch_flag + movi a3, 1 + s32i a3, a2, 0 + + RET(16) + +/* +******************************************************************************* +* _frxt_int_enter +* void _frxt_int_enter(void) +* +* Implements the Xtensa RTOS porting layer's XT_RTOS_INT_ENTER function for +* freeRTOS. Saves the rest of the interrupt context (not already saved). +* May only be called from assembly code by the 'call0' instruction, with +* interrupts disabled. +* See the detailed description of the XT_RTOS_ENTER macro in xtensa_rtos.h. +* +******************************************************************************* +*/ + .globl _frxt_int_enter + .type _frxt_int_enter,@function + .align 4 +_frxt_int_enter: + + /* Save a12-13 in the stack frame as required by _xt_context_save. */ + s32i a12, a1, XT_STK_A12 + s32i a13, a1, XT_STK_A13 + + /* Save return address in a safe place (free a0). */ + mov a12, a0 + + /* Save the rest of the interrupted context (preserves A12-13). */ + call0 _xt_context_save + + /* + Save interrupted task's SP in TCB only if not nesting. + Manage nesting directly rather than call the generic IntEnter() + (in windowed ABI we can't call a C function here anyway because PS.EXCM is still set). + */ + movi a2, port_xSchedulerRunning + movi a3, port_interruptNesting + l32i a2, a2, 0 /* a2 = port_xSchedulerRunning */ + beqz a2, 1f /* scheduler not running, no tasks */ + l32i a2, a3, 0 /* a2 = port_interruptNesting */ + addi a2, a2, 1 /* increment nesting count */ + s32i a2, a3, 0 /* save nesting count */ + bnei a2, 1, .Lnested /* !=0 before incr, so nested */ + + movi a2, pxCurrentTCB + l32i a2, a2, 0 /* a2 = current TCB */ + beqz a2, 1f + s32i a1, a2, TOPOFSTACK_OFFS /* pxCurrentTCB->pxTopOfStack = SP */ + movi a1, port_IntStackTop /* a1 = top of intr stack */ + +.Lnested: +1: + mov a0, a12 /* restore return addr and return */ + ret + +/* +******************************************************************************* +* _frxt_int_exit +* void _frxt_int_exit(void) +* +* Implements the Xtensa RTOS porting layer's XT_RTOS_INT_EXIT function for +* FreeRTOS. If required, calls vPortYieldFromInt() to perform task context +* switching, restore the (possibly) new task's context, and return to the +* exit dispatcher saved in the task's stack frame at XT_STK_EXIT. +* May only be called from assembly code by the 'call0' instruction. Does not +* return to caller. +* See the description of the XT_RTOS_ENTER macro in xtensa_rtos.h. +* +******************************************************************************* +*/ + .globl _frxt_int_exit + .type _frxt_int_exit,@function + .align 4 +_frxt_int_exit: + + movi a2, port_xSchedulerRunning + movi a3, port_interruptNesting + rsil a0, XCHAL_EXCM_LEVEL /* lock out interrupts */ + l32i a2, a2, 0 /* a2 = port_xSchedulerRunning */ + beqz a2, .Lnoswitch /* scheduler not running, no tasks */ + l32i a2, a3, 0 /* a2 = port_interruptNesting */ + addi a2, a2, -1 /* decrement nesting count */ + s32i a2, a3, 0 /* save nesting count */ + bnez a2, .Lnesting /* !=0 after decr so still nested */ + + movi a2, pxCurrentTCB + l32i a2, a2, 0 /* a2 = current TCB */ + beqz a2, 1f /* no task ? go to dispatcher */ + l32i a1, a2, TOPOFSTACK_OFFS /* SP = pxCurrentTCB->pxTopOfStack */ + + movi a2, port_switch_flag /* address of switch flag */ + l32i a3, a2, 0 /* a3 = port_switch_flag */ + beqz a3, .Lnoswitch /* flag = 0 means no switch reqd */ + movi a3, 0 + s32i a3, a2, 0 /* zero out the flag for next time */ + +1: + /* + Call0 ABI callee-saved regs a12-15 need to be saved before possible preemption. + However a12-13 were already saved by _frxt_int_enter(). + */ + #ifdef __XTENSA_CALL0_ABI__ + s32i a14, a1, XT_STK_A14 + s32i a15, a1, XT_STK_A15 + #endif + + #ifdef __XTENSA_CALL0_ABI__ + call0 vPortYieldFromInt /* call dispatch inside the function; never returns */ + #else + call4 vPortYieldFromInt /* this one returns */ + call0 _frxt_dispatch /* tail-call dispatcher */ + /* Never returns here. */ + #endif + +.Lnoswitch: + /* + If we came here then about to resume the interrupted task. + */ + +.Lnesting: + /* + We come here only if there was no context switch, that is if this + is a nested interrupt, or the interrupted task was not preempted. + In either case there's no need to load the SP. + */ + + /* Restore full context from interrupt stack frame */ + call0 _xt_context_restore + + /* + Must return via the exit dispatcher corresponding to the entrypoint from which + this was called. Interruptee's A0, A1, PS, PC are restored and the interrupt + stack frame is deallocated in the exit dispatcher. + */ + l32i a0, a1, XT_STK_EXIT + ret + + +/* +********************************************************************************************************** +* _frxt_timer_int +* void _frxt_timer_int(void) +* +* Implements the Xtensa RTOS porting layer's XT_RTOS_TIMER_INT function for FreeRTOS. +* Called every timer interrupt. +* Manages the tick timer and calls xPortSysTickHandler() every tick. +* See the detailed description of the XT_RTOS_ENTER macro in xtensa_rtos.h. +* +* Callable from C (obeys ABI conventions). Implemented in assmebly code for performance. +* +********************************************************************************************************** +*/ + .globl _frxt_timer_int + .type _frxt_timer_int,@function + .align 4 +_frxt_timer_int: + + /* + Xtensa timers work by comparing a cycle counter with a preset value. Once the match occurs + an interrupt is generated, and the handler has to set a new cycle count into the comparator. + To avoid clock drift due to interrupt latency, the new cycle count is computed from the old, + not the time the interrupt was serviced. However if a timer interrupt is ever serviced more + than one tick late, it is necessary to process multiple ticks until the new cycle count is + in the future, otherwise the next timer interrupt would not occur until after the cycle + counter had wrapped (2^32 cycles later). + + do { + ticks++; + old_ccompare = read_ccompare_i(); + write_ccompare_i( old_ccompare + divisor ); + service one tick; + diff = read_ccount() - old_ccompare; + } while ( diff > divisor ); + */ + + ENTRY(16) + +.L_xt_timer_int_catchup: + + /* Update the timer comparator for the next tick. */ + #ifdef XT_CLOCK_FREQ + movi a2, XT_TICK_DIVISOR /* a2 = comparator increment */ + #else + movi a3, _xt_tick_divisor + l32i a2, a3, 0 /* a2 = comparator increment */ + #endif + rsr a3, XT_CCOMPARE /* a3 = old comparator value */ + add a4, a3, a2 /* a4 = new comparator value */ + wsr a4, XT_CCOMPARE /* update comp. and clear interrupt */ + esync + + #ifdef __XTENSA_CALL0_ABI__ + /* Preserve a2 and a3 across C calls. */ + s32i a2, sp, 4 + s32i a3, sp, 8 + #endif + + /* Call the FreeRTOS tick handler (see port.c). */ + #ifdef __XTENSA_CALL0_ABI__ + call0 xPortSysTickHandler + #else + call4 xPortSysTickHandler + #endif + + #ifdef __XTENSA_CALL0_ABI__ + /* Restore a2 and a3. */ + l32i a2, sp, 4 + l32i a3, sp, 8 + #endif + + /* Check if we need to process more ticks to catch up. */ + esync /* ensure comparator update complete */ + rsr a4, CCOUNT /* a4 = cycle count */ + sub a4, a4, a3 /* diff = ccount - old comparator */ + blt a2, a4, .L_xt_timer_int_catchup /* repeat while diff > divisor */ + + RET(16) + + /* +********************************************************************************************************** +* _frxt_tick_timer_init +* void _frxt_tick_timer_init(void) +* +* Initialize timer and timer interrrupt handler (_xt_tick_divisor_init() has already been been called). +* Callable from C (obeys ABI conventions on entry). +* +********************************************************************************************************** +*/ + .globl _frxt_tick_timer_init + .type _frxt_tick_timer_init,@function + .align 4 +_frxt_tick_timer_init: + + ENTRY(16) + + /* Set up the periodic tick timer (assume enough time to complete init). */ + #ifdef XT_CLOCK_FREQ + movi a3, XT_TICK_DIVISOR + #else + movi a2, _xt_tick_divisor + l32i a3, a2, 0 + #endif + rsr a2, CCOUNT /* current cycle count */ + add a2, a2, a3 /* time of first timer interrupt */ + wsr a2, XT_CCOMPARE /* set the comparator */ + + /* + Enable the timer interrupt at the device level. Don't write directly + to the INTENABLE register because it may be virtualized. + */ + #ifdef __XTENSA_CALL0_ABI__ + movi a2, XT_TIMER_INTEN + call0 xt_ints_on + #else + movi a6, XT_TIMER_INTEN + call4 xt_ints_on + #endif + + RET(16) + +/* +********************************************************************************************************** +* DISPATCH THE HIGH READY TASK +* void _frxt_dispatch(void) +* +* Switch context to the highest priority ready task, restore its state and dispatch control to it. +* +* This is a common dispatcher that acts as a shared exit path for all the context switch functions +* including vPortYield() and vPortYieldFromInt(), all of which tail-call this dispatcher +* (for windowed ABI vPortYieldFromInt() calls it indirectly via _frxt_int_exit() ). +* +* The Xtensa port uses different stack frames for solicited and unsolicited task suspension (see +* comments on stack frames in xtensa_context.h). This function restores the state accordingly. +* If restoring a task that solicited entry, restores the minimal state and leaves CPENABLE clear. +* If restoring a task that was preempted, restores all state including the task's CPENABLE. +* +* Entry: +* pxCurrentTCB points to the TCB of the task to suspend, +* Because it is tail-called without a true function entrypoint, it needs no 'entry' instruction. +* +* Exit: +* If incoming task called vPortYield() (solicited), this function returns as if from vPortYield(). +* If incoming task was preempted by an interrupt, this function jumps to exit dispatcher. +* +********************************************************************************************************** +*/ + .globl _frxt_dispatch + .type _frxt_dispatch,@function + .align 4 +_frxt_dispatch: + + #ifdef __XTENSA_CALL0_ABI__ + call0 vTaskSwitchContext // Get next TCB to resume + movi a2, pxCurrentTCB + #else + movi a2, pxCurrentTCB + call4 vTaskSwitchContext // Get next TCB to resume + #endif + l32i a3, a2, 0 + l32i sp, a3, TOPOFSTACK_OFFS /* SP = next_TCB->pxTopOfStack; */ + s32i a3, a2, 0 + + /* Determine the type of stack frame. */ + l32i a2, sp, XT_STK_EXIT /* exit dispatcher or solicited flag */ + bnez a2, .L_frxt_dispatch_stk + +.L_frxt_dispatch_sol: + + /* Solicited stack frame. Restore minimal context and return from vPortYield(). */ + l32i a3, sp, XT_SOL_PS + #ifdef __XTENSA_CALL0_ABI__ + l32i a12, sp, XT_SOL_A12 + l32i a13, sp, XT_SOL_A13 + l32i a14, sp, XT_SOL_A14 + l32i a15, sp, XT_SOL_A15 + #endif + l32i a0, sp, XT_SOL_PC + #if XCHAL_CP_NUM > 0 + /* Ensure wsr.CPENABLE is complete (should be, it was cleared on entry). */ + rsync + #endif + /* As soons as PS is restored, interrupts can happen. No need to sync PS. */ + wsr a3, PS + #ifdef __XTENSA_CALL0_ABI__ + addi sp, sp, XT_SOL_FRMSZ + ret + #else + retw + #endif + +.L_frxt_dispatch_stk: + + #if XCHAL_CP_NUM > 0 + /* Restore CPENABLE from task's co-processor save area. */ + movi a3, pxCurrentTCB /* cp_state = */ + l32i a3, a3, 0 + l32i a2, a3, CP_TOPOFSTACK_OFFS /* StackType_t *pxStack; */ + l16ui a3, a2, XT_CPENABLE /* CPENABLE = cp_state->cpenable; */ + wsr a3, CPENABLE + #endif + + /* Interrupt stack frame. Restore full context and return to exit dispatcher. */ + call0 _xt_context_restore + + /* In Call0 ABI, restore callee-saved regs (A12, A13 already restored). */ + #ifdef __XTENSA_CALL0_ABI__ + l32i a14, sp, XT_STK_A14 + l32i a15, sp, XT_STK_A15 + #endif + + #if XCHAL_CP_NUM > 0 + /* Ensure wsr.CPENABLE has completed. */ + rsync + #endif + + /* + Must return via the exit dispatcher corresponding to the entrypoint from which + this was called. Interruptee's A0, A1, PS, PC are restored and the interrupt + stack frame is deallocated in the exit dispatcher. + */ + l32i a0, sp, XT_STK_EXIT + ret + + +/* +********************************************************************************************************** +* PERFORM A SOLICTED CONTEXT SWITCH (from a task) +* void vPortYield(void) +* +* This function saves the minimal state needed for a solicited task suspension, clears CPENABLE, +* then tail-calls the dispatcher _frxt_dispatch() to perform the actual context switch +* +* At Entry: +* pxCurrentTCB points to the TCB of the task to suspend +* Callable from C (obeys ABI conventions on entry). +* +* Does not return to caller. +* +********************************************************************************************************** +*/ + .globl vPortYield + .type vPortYield,@function + .align 4 +vPortYield: + + #ifdef __XTENSA_CALL0_ABI__ + addi sp, sp, -XT_SOL_FRMSZ + #else + entry sp, XT_SOL_FRMSZ + #endif + + rsr a2, PS + s32i a0, sp, XT_SOL_PC + s32i a2, sp, XT_SOL_PS + #ifdef __XTENSA_CALL0_ABI__ + s32i a12, sp, XT_SOL_A12 /* save callee-saved registers */ + s32i a13, sp, XT_SOL_A13 + s32i a14, sp, XT_SOL_A14 + s32i a15, sp, XT_SOL_A15 + #else + /* Spill register windows. Calling xthal_window_spill() causes extra */ + /* spills and reloads, so we will set things up to call the _nw version */ + /* instead to save cycles. */ + movi a6, ~(PS_WOE_MASK|PS_INTLEVEL_MASK) /* spills a4-a7 if needed */ + and a2, a2, a6 /* clear WOE, INTLEVEL */ + addi a2, a2, XCHAL_EXCM_LEVEL /* set INTLEVEL */ + wsr a2, PS + rsync + call0 xthal_window_spill_nw + l32i a2, sp, XT_SOL_PS /* restore PS */ + wsr a2, PS + #endif + + rsil a2, XCHAL_EXCM_LEVEL /* disable low/med interrupts */ + + #if XCHAL_CP_NUM > 0 + /* Save coprocessor callee-saved state (if any). At this point CPENABLE */ + /* should still reflect which CPs were in use (enabled). */ + call0 _xt_coproc_savecs + #endif + + movi a2, pxCurrentTCB + movi a3, 0 + l32i a2, a2, 0 /* a2 = pxCurrentTCB */ + s32i a3, sp, XT_SOL_EXIT /* 0 to flag as solicited frame */ + s32i sp, a2, TOPOFSTACK_OFFS /* pxCurrentTCB->pxTopOfStack = SP */ + + #if XCHAL_CP_NUM > 0 + /* Clear CPENABLE, also in task's co-processor state save area. */ + l32i a2, a2, CP_TOPOFSTACK_OFFS /* a2 = pxCurrentTCB->cp_state */ + movi a3, 0 + wsr a3, CPENABLE + beqz a2, 1f + s16i a3, a2, XT_CPENABLE /* clear saved cpenable */ +1: + #endif + + /* Tail-call dispatcher. */ + call0 _frxt_dispatch + /* Never reaches here. */ + + +/* +********************************************************************************************************** +* PERFORM AN UNSOLICITED CONTEXT SWITCH (from an interrupt) +* void vPortYieldFromInt(void) +* +* This calls the context switch hook (removed), saves and clears CPENABLE, then tail-calls the dispatcher +* _frxt_dispatch() to perform the actual context switch. +* +* At Entry: +* Interrupted task context has been saved in an interrupt stack frame at pxCurrentTCB->pxTopOfStack. +* pxCurrentTCB points to the TCB of the task to suspend, +* Callable from C (obeys ABI conventions on entry). +* +* At Exit: +* Windowed ABI defers the actual context switch until the stack is unwound to interrupt entry. +* Call0 ABI tail-calls the dispatcher directly (no need to unwind) so does not return to caller. +* +********************************************************************************************************** +*/ + .globl vPortYieldFromInt + .type vPortYieldFromInt,@function + .align 4 +vPortYieldFromInt: + + ENTRY(16) + + #if XCHAL_CP_NUM > 0 + /* Save CPENABLE in task's co-processor save area, and clear CPENABLE. */ + movi a3, pxCurrentTCB /* cp_state = */ + l32i a3, a3, 0 + l32i a2, a3, CP_TOPOFSTACK_OFFS + + rsr a3, CPENABLE + s16i a3, a2, XT_CPENABLE /* cp_state->cpenable = CPENABLE; */ + movi a3, 0 + wsr a3, CPENABLE /* disable all co-processors */ + #endif + + #ifdef __XTENSA_CALL0_ABI__ + /* Tail-call dispatcher. */ + call0 _frxt_dispatch + /* Never reaches here. */ + #else + RET(16) + #endif + +/* +********************************************************************************************************** +* _frxt_task_coproc_state +* void _frxt_task_coproc_state(void) +* +* Implements the Xtensa RTOS porting layer's XT_RTOS_CP_STATE function for FreeRTOS. +* +* May only be called when a task is running, not within an interrupt handler (returns 0 in that case). +* May only be called from assembly code by the 'call0' instruction. Does NOT obey ABI conventions. +* Returns in A15 a pointer to the base of the co-processor state save area for the current task. +* See the detailed description of the XT_RTOS_ENTER macro in xtensa_rtos.h. +* +********************************************************************************************************** +*/ +#if XCHAL_CP_NUM > 0 + + .globl _frxt_task_coproc_state + .type _frxt_task_coproc_state,@function + .align 4 +_frxt_task_coproc_state: + + movi a15, port_xSchedulerRunning /* if (port_xSchedulerRunning */ + l32i a15, a15, 0 + beqz a15, 1f + movi a15, port_interruptNesting /* && port_interruptNesting == 0 */ + l32i a15, a15, 0 + bnez a15, 1f + movi a15, pxCurrentTCB + l32i a15, a15, 0 /* && pxCurrentTCB != 0) { */ + beqz a15, 2f + l32i a15, a15, CP_TOPOFSTACK_OFFS + ret + +1: movi a15, 0 +2: ret + +#endif /* XCHAL_CP_NUM > 0 */ + diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portbenchmark.h b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portbenchmark.h new file mode 100644 index 000000000..aaddd9206 --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portbenchmark.h @@ -0,0 +1,46 @@ +/******************************************************************************* +// Copyright (c) 2003-2015 Cadence Design Systems, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining +// a copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to +// permit persons to whom the Software is furnished to do so, subject to +// the following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +-------------------------------------------------------------------------------- +*/ + +/* + * This utility helps benchmarking interrupt latency and context switches. + * In order to enable it, set configBENCHMARK to 1 in FreeRTOSConfig.h. + * You will also need to download the FreeRTOS_trace patch that contains + * portbenchmark.c and the complete version of portbenchmark.h + */ + +#ifndef PORTBENCHMARK_H +#define PORTBENCHMARK_H + +#if configBENCHMARK + #error "You need to download the FreeRTOS_trace patch that overwrites this file" +#endif + +#define portbenchmarkINTERRUPT_DISABLE() +#define portbenchmarkINTERRUPT_RESTORE(newstate) +#define portbenchmarkIntLatency() +#define portbenchmarkIntWait() +#define portbenchmarkReset() +#define portbenchmarkPrint() + +#endif /* PORTBENCHMARK */ diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portclib.c b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portclib.c new file mode 100644 index 000000000..3b3941d7a --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portclib.c @@ -0,0 +1,225 @@ +/******************************************************************************* +// Copyright (c) 2003-2015 Cadence Design Systems, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining +// a copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to +// permit persons to whom the Software is furnished to do so, subject to +// the following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +-------------------------------------------------------------------------------- +*/ + +#include "FreeRTOS.h" + +#if XT_USE_THREAD_SAFE_CLIB + +#if XSHAL_CLIB == XTHAL_CLIB_XCLIB + +#include +#include + +#include "semphr.h" + +typedef SemaphoreHandle_t _Rmtx; + +//----------------------------------------------------------------------------- +// Override this and set to nonzero to enable locking. +//----------------------------------------------------------------------------- +int32_t _xclib_use_mt = 1; + + +//----------------------------------------------------------------------------- +// Init lock. +//----------------------------------------------------------------------------- +void +_Mtxinit(_Rmtx * mtx) +{ + *mtx = xSemaphoreCreateRecursiveMutex(); +} + +//----------------------------------------------------------------------------- +// Destroy lock. +//----------------------------------------------------------------------------- +void +_Mtxdst(_Rmtx * mtx) +{ + if ((mtx != NULL) && (*mtx != NULL)) { + vSemaphoreDelete(*mtx); + } +} + +//----------------------------------------------------------------------------- +// Lock. +//----------------------------------------------------------------------------- +void +_Mtxlock(_Rmtx * mtx) +{ + if ((mtx != NULL) && (*mtx != NULL)) { + xSemaphoreTakeRecursive(*mtx, portMAX_DELAY); + } +} + +//----------------------------------------------------------------------------- +// Unlock. +//----------------------------------------------------------------------------- +void +_Mtxunlock(_Rmtx * mtx) +{ + if ((mtx != NULL) && (*mtx != NULL)) { + xSemaphoreGiveRecursive(*mtx); + } +} + +//----------------------------------------------------------------------------- +// Called by malloc() to allocate blocks of memory from the heap. +//----------------------------------------------------------------------------- +void * +_sbrk_r (struct _reent * reent, int32_t incr) +{ + extern char _end; + extern char _heap_sentry; + static char * _heap_sentry_ptr = &_heap_sentry; + static char * heap_ptr; + char * base; + + if (!heap_ptr) + heap_ptr = (char *) &_end; + + base = heap_ptr; + if (heap_ptr + incr >= _heap_sentry_ptr) { + reent->_errno = ENOMEM; + return (char *) -1; + } + + heap_ptr += incr; + return base; +} + +//----------------------------------------------------------------------------- +// Global initialization for C library. +//----------------------------------------------------------------------------- +void +vPortClibInit(void) +{ +} + +//----------------------------------------------------------------------------- +// Per-thread cleanup stub provided for linking, does nothing. +//----------------------------------------------------------------------------- +void +_reclaim_reent(void * ptr) +{ +} + +#endif /* XSHAL_CLIB == XTHAL_CLIB_XCLIB */ + +#if XSHAL_CLIB == XTHAL_CLIB_NEWLIB + +#include +#include +#include +#include +#include + +#include "semphr.h" + +static SemaphoreHandle_t xClibMutex; +static uint32_t ulClibInitDone = 0; + +//----------------------------------------------------------------------------- +// Get C library lock. +//----------------------------------------------------------------------------- +void +__malloc_lock(struct _reent * ptr) +{ + if (!ulClibInitDone) + return; + + xSemaphoreTakeRecursive(xClibMutex, portMAX_DELAY); +} + +//----------------------------------------------------------------------------- +// Release C library lock. +//----------------------------------------------------------------------------- +void +__malloc_unlock(struct _reent * ptr) +{ + if (!ulClibInitDone) + return; + + xSemaphoreGiveRecursive(xClibMutex); +} + +//----------------------------------------------------------------------------- +// Lock for environment. Since we have only one global lock we can just call +// the malloc() lock function. +//----------------------------------------------------------------------------- +void +__env_lock(struct _reent * ptr) +{ + __malloc_lock(ptr); +} + + +//----------------------------------------------------------------------------- +// Unlock environment. +//----------------------------------------------------------------------------- +void +__env_unlock(struct _reent * ptr) +{ + __malloc_unlock(ptr); +} + +//----------------------------------------------------------------------------- +// Called by malloc() to allocate blocks of memory from the heap. +//----------------------------------------------------------------------------- +void * +_sbrk_r (struct _reent * reent, int32_t incr) +{ + extern char _end; + extern char _heap_sentry; + static char * _heap_sentry_ptr = &_heap_sentry; + static char * heap_ptr; + char * base; + + if (!heap_ptr) + heap_ptr = (char *) &_end; + + base = heap_ptr; + if (heap_ptr + incr >= _heap_sentry_ptr) { + reent->_errno = ENOMEM; + return (char *) -1; + } + + heap_ptr += incr; + return base; +} + +//----------------------------------------------------------------------------- +// Global initialization for C library. +//----------------------------------------------------------------------------- +void +vPortClibInit(void) +{ + configASSERT(!ulClibInitDone); + + xClibMutex = xSemaphoreCreateRecursiveMutex(); + ulClibInitDone = 1; +} + +#endif /* XSHAL_CLIB == XTHAL_CLIB_NEWLIB */ + +#endif /* XT_USE_THREAD_SAFE_CLIB */ diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portmacro.h b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portmacro.h new file mode 100644 index 000000000..82e783dc4 --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/portmacro.h @@ -0,0 +1,244 @@ +/* + FreeRTOS V9.0.0 - Copyright (C) 2016 Real Time Engineers Ltd. + All rights reserved + + VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. + + *************************************************************************** + * * + * FreeRTOS provides completely free yet professionally developed, * + * robust, strictly quality controlled, supported, and cross * + * platform software that has become a de facto standard. * + * * + * Help yourself get started quickly and support the FreeRTOS * + * project by purchasing a FreeRTOS tutorial book, reference * + * manual, or both from: http://www.FreeRTOS.org/Documentation * + * * + * Thank you! * + * * + *************************************************************************** + + This file is part of the FreeRTOS distribution. + + FreeRTOS is free software; you can redistribute it and/or modify it under + the terms of the GNU General Public License (version 2) as published by the + Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception. + + >>! NOTE: The modification to the GPL is included to allow you to !<< + >>! distribute a combined work that includes FreeRTOS without being !<< + >>! obliged to provide the source code for proprietary components !<< + >>! outside of the FreeRTOS kernel. !<< + + FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + FOR A PARTICULAR PURPOSE. Full license text is available from the following + link: http://www.freertos.org/a00114.html + + 1 tab == 4 spaces! + + *************************************************************************** + * * + * Having a problem? Start by reading the FAQ "My application does * + * not run, what could be wrong?" * + * * + * http://www.FreeRTOS.org/FAQHelp.html * + * * + *************************************************************************** + + http://www.FreeRTOS.org - Documentation, books, training, latest versions, + license and Real Time Engineers Ltd. contact details. + + http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, + including FreeRTOS+Trace - an indispensable productivity tool, a DOS + compatible FAT file system, and our tiny thread aware UDP/IP stack. + + http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High + Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS + licenses offer ticketed support, indemnification and middleware. + + http://www.SafeRTOS.com - High Integrity Systems also provide a safety + engineered and independently SIL3 certified version for use in safety and + mission critical applications that require provable dependability. + + 1 tab == 4 spaces! +*/ + +#ifndef PORTMACRO_H +#define PORTMACRO_H + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef __ASSEMBLER__ + +#include + +#include +#include +#include +#include /* required for XSHAL_CLIB */ +#include + +//#include "xtensa_context.h" + +/*----------------------------------------------------------- + * Port specific definitions. + * + * The settings in this file configure FreeRTOS correctly for the + * given hardware and compiler. + * + * These settings should not be altered. + *----------------------------------------------------------- + */ + +/* Type definitions. */ + +#define portCHAR int8_t +#define portFLOAT float +#define portDOUBLE double +#define portLONG int32_t +#define portSHORT int16_t +#define portSTACK_TYPE uint8_t +#define portBASE_TYPE int + +typedef portSTACK_TYPE StackType_t; +typedef portBASE_TYPE BaseType_t; +typedef unsigned portBASE_TYPE UBaseType_t; + +#if( configUSE_16_BIT_TICKS == 1 ) + typedef uint16_t TickType_t; + #define portMAX_DELAY ( TickType_t ) 0xffff +#else + typedef uint32_t TickType_t; + #define portMAX_DELAY ( TickType_t ) 0xffffffffUL +#endif +/*-----------------------------------------------------------*/ + +// portbenchmark +#include "portbenchmark.h" + +/* Critical section management. NW-TODO: replace XTOS_SET_INTLEVEL with more efficient version, if any? */ +// These cannot be nested. They should be used with a lot of care and cannot be called from interrupt level. +#define portDISABLE_INTERRUPTS() do { XTOS_SET_INTLEVEL(XCHAL_EXCM_LEVEL); portbenchmarkINTERRUPT_DISABLE(); } while (0) +#define portENABLE_INTERRUPTS() do { portbenchmarkINTERRUPT_RESTORE(0); XTOS_SET_INTLEVEL(0); } while (0) + +// These can be nested +#define portCRITICAL_NESTING_IN_TCB 1 // For now, let FreeRTOS' (tasks.c) manage critical nesting +void vTaskEnterCritical(void); +void vTaskExitCritical(void); +#define portENTER_CRITICAL() vTaskEnterCritical() +#define portEXIT_CRITICAL() vTaskExitCritical() + +// Cleaner and preferred solution allows nested interrupts disabling and restoring via local registers or stack. +// They can be called from interrupts too. +static inline unsigned portENTER_CRITICAL_NESTED() { unsigned state = XTOS_SET_INTLEVEL(XCHAL_EXCM_LEVEL); portbenchmarkINTERRUPT_DISABLE(); return state; } +#define portEXIT_CRITICAL_NESTED(state) do { portbenchmarkINTERRUPT_RESTORE(state); XTOS_RESTORE_JUST_INTLEVEL(state); } while (0) + +// These FreeRTOS versions are similar to the nested versions above +#define portSET_INTERRUPT_MASK_FROM_ISR() portENTER_CRITICAL_NESTED() +#define portCLEAR_INTERRUPT_MASK_FROM_ISR(state) portEXIT_CRITICAL_NESTED(state) +/*-----------------------------------------------------------*/ + +/* Architecture specifics. */ +#define portSTACK_GROWTH ( -1 ) +#define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ ) +#define portBYTE_ALIGNMENT 4 +#define portNOP() XT_NOP() +/*-----------------------------------------------------------*/ + +/* Fine resolution time */ +#define portGET_RUN_TIME_COUNTER_VALUE() xthal_get_ccount() + +/* Kernel utilities. */ +void vPortYield( void ); +void _frxt_setup_switch( void ); +#define portYIELD() vPortYield() +#define portYIELD_FROM_ISR( x ) if( ( x ) != 0 ) { _frxt_setup_switch(); } +/*-----------------------------------------------------------*/ + +/* Task function macros as described on the FreeRTOS.org WEB site. */ +#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters ) +#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters ) + +// When coprocessors are defined, we to maintain a pointer to coprocessors area. +// We currently use a hack: redefine field xMPU_SETTINGS in TCB block as a structure that can hold: +// MPU wrappers, coprocessor area pointer, trace code structure, and more if needed. +// The field is normally used for memory protection. FreeRTOS should create another general purpose field. +typedef struct { + #if XCHAL_CP_NUM > 0 + volatile StackType_t* coproc_area; // Pointer to coprocessor save area; MUST BE FIRST + #endif + + #if portUSING_MPU_WRAPPERS + // Define here mpu_settings, which is port dependent + int mpu_setting; // Just a dummy example here; MPU not ported to Xtensa yet + #endif + + #if configUSE_TRACE_FACILITY_2 + struct { + // Cf. porttraceStamp() + int taskstamp; /* Stamp from inside task to see where we are */ + int taskstampcount; /* A counter usually incremented when we restart the task's loop */ + } porttrace; + #endif +} xMPU_SETTINGS; + +// Main hack to use MPU_wrappers even when no MPU is defined (warning: mpu_setting should not be accessed; otherwise move this above xMPU_SETTINGS) +#if (XCHAL_CP_NUM > 0 || configUSE_TRACE_FACILITY_2) && !portUSING_MPU_WRAPPERS // If MPU wrappers not used, we still need to allocate coproc area + #undef portUSING_MPU_WRAPPERS + #define portUSING_MPU_WRAPPERS 1 // Enable it to allocate coproc area + #define MPU_WRAPPERS_H // Override mpu_wrapper.h to disable unwanted code + #define PRIVILEGED_FUNCTION + #define PRIVILEGED_DATA +#endif + +// porttrace +#if configUSE_TRACE_FACILITY_2 +#include "porttrace.h" +#endif + +// configASSERT_2 if requested +#if configASSERT_2 +#include +void exit(int); +#define configASSERT( x ) if (!(x)) { porttracePrint(-1); printf("\nAssertion failed in %s:%d\n", __FILE__, __LINE__); exit(-1); } +#endif + + +/* C library support -- only XCLIB and NEWLIB are supported. */ + +/* To enable thread-safe C library support, XT_USE_THREAD_SAFE_CLIB must be + defined to be > 0 somewhere above or on the command line. */ + +#if (XT_USE_THREAD_SAFE_CLIB > 0u) && (XSHAL_CLIB == XTHAL_CLIB_XCLIB) +extern void vPortClibInit(void); + +// No cleanup necessary at this time. +#define portCLEAN_UP_TCB(pxTCB) +#endif // XCLIB support + +#if (XT_USE_THREAD_SAFE_CLIB > 0u) && (XSHAL_CLIB == XTHAL_CLIB_NEWLIB) +extern void vPortClibInit(void); + +// This C library cleanup is not currently done by FreeRTOS when deleting a task +#include +#define portCLEAN_UP_TCB(pxTCB) vPortCleanUpTcbClib(&((pxTCB)->xNewLib_reent)) +static inline void vPortCleanUpTcbClib(struct _reent *ptr) +{ + FILE * fp = &(ptr->__sf[0]); + int i; + for (i = 0; i < 3; ++i, ++fp) { + fp->_close = NULL; + } +} +#endif // NEWLIB support + +#endif // __ASSEMBLER__ + +#ifdef __cplusplus +} +#endif + +#endif /* PORTMACRO_H */ + diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/porttrace.h b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/porttrace.h new file mode 100644 index 000000000..bc1ff90a8 --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/porttrace.h @@ -0,0 +1,42 @@ +/******************************************************************************* +// Copyright (c) 2003-2015 Cadence Design Systems, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining +// a copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to +// permit persons to whom the Software is furnished to do so, subject to +// the following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +-------------------------------------------------------------------------------- + +/* + * This utility helps tracing the entering and exiting from tasks. It maintains a circular buffer + * of tasks in the order they execute, and their execution time. + * In order to enable it, set configUSE_TRACE_FACILITY_2 to 1 in FreeRTOSConfig.h. + * You will also need to download the FreeRTOS_trace patch that contains + * porttrace.c and the complete version of porttrace.h + */ + +#ifndef PORTTRACE_H +#define PORTTRACE_H + +#if configUSE_TRACE_FACILITY_2 + #error "You need to download the FreeRTOS_trace patch that overwrites this file" +#endif + +#define porttracePrint(nelements) +#define porttraceStamp(stamp, count_incr) + +#endif /* PORTTRACE_H */ diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/readme_xtensa.txt b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/readme_xtensa.txt new file mode 100644 index 000000000..247d73168 --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/readme_xtensa.txt @@ -0,0 +1,764 @@ + FreeRTOS Port for Xtensa Configurable and Diamond Processors + ============================================================ + + FreeRTOS Kernel Version 10.0.0 + + +Introduction +------------ + +This document describes the Xtensa port for FreeRTOS multitasking RTOS. +For an introduction to FreeRTOS itself, please refer to FreeRTOS +documentation. + +This port currently works with FreeRTOS kernel version 10.0.0. + + +Xtensa Configuration Requirements and Restrictions +-------------------------------------------------- + +The Xtensa configurable architecture supports a vast space of processor +features. This port supports all of them, including custom processor +extensions defined in the TIE language, with certain minimum +requirements. You must use Xtensa Tools to compile and link FreeRTOS and +your application for your Xtensa configuration. The port uses the Xtensa +Hardware Abstraction Layer (HAL) to adapt to your Xtensa configuration. +NOTE: It may be possible to build and run this with the open-source +xtensa-linux tools provided you have the correct overlay for your Xtensa +configuration. However, this has not been tested and is currently not +supported by Cadence. + +This port includes optional reentrancy support for the 'newlib' and +'xclib' C runtime libraries distributed with Xtensa Tools, providing +thread-safety on a per task basis (for use in tasks only, not interrupt +handlers). + +NOTE: At this time only 'newlib' and 'xclib' C libraries are supported +for thread safety. The 'uclibc' library is not reentrant and does not +provide thread safety at this time. However, if you are not concerned +with reentrancy then you can use any of these libraries. + +This port also includes a simple example application that may run on +a supported board or the Xtensa instruction set simulator (ISS). There +are also a couple of test programs used in maintaining the port, which +serve as additional examples. + +FreeRTOS for Xtensa configurable processors requires the following minimum +processor configuration options: +- Timer interrupt option with at least one interruptible timer. +- Interrupt option (implied by the timer interrupt option). +- Exception Architecture 2 (XEA2). Please note that XEA1 is NOT supported. + All 'Diamond', 'Xtensa 6', 'Xtensa LX' and 'Xtensa LX2' processors and + most 'Xtensa T1050' processors are configured with XEA2. +All Diamond processor cores meet these requirements and are supported. + +Minimal support for certain evaluation boards is provided via a board +independent XTBSP API implemented by a board specific library distributed +with the Xtensa Tools. This provides the board clock frequency and basic +polled drivers for the display and console device. Note that XTBSP +is not a tradtional RTOS "board support package" with RTOS specific +interrupt-driven drivers - it is not specific to any RTOS. Note that +FreeRTOS can run on any Xtensa or Diamond board without this board support +(a "raw" platform), but you will have to provide the clock frequency +and drivers for any on-board devices you want to use. + + +Installation +------------ + +The Xtensa port of FreeRTOS is available at this location: + + https://github.com/foss-xtensa/amazon-freertos + +This download includes the core FreeRTOS source and include files needed +to build the port. You can also download the official release of FreeRTOS +version 1.0.0 or later from this location: + + https://github.com/aws/amazon-freertos + +The Xtensa port files are currently not included in the official package. + +All source is provided along with a Makefile that works for any host +platform supported by Xtensa Tools (Windows, Linux). These instructions +are written for Windows users, but can easily be understood and adapted +to other host platforms. + +First install the FreeRTOS common package in a directory of your choosing. +The structure of that package will look like this: + + +|-- demos +| `-- cadence +| `-- sim +| |-- common +| | |-- application_code +| | | `-- cadence_code +| | `-- config_files +| `-- xplorer +`-- lib + |-- FreeRTOS + | `-- portable + | |-- Common + | |-- MemMang + | `-- XCC + | `-- Xtensa + `-- include + `-- private + +The Xtensa Tools are available from Cadence as part of a processor +license. Be sure you have installed the Xtensa Tools and your processor +configuration. + + +Building FreeRTOS for Xtensa +---------------------------- + +To build the FreeRTOS library and the example programs, go into the +directory 'demos/cadence/sim' and use the makefile in that directory. +"make all" will build all the examples. There is another makefile in +the 'lib/FreeRTOS/portable/XCC/Xtensa' directory that builds just the +FreeRTOS library. + +By default, you will build for the Xtensa instruction set simulator. If +you have a supported emulation board, you can build to run on that. You +can also build to run on a raw Xtensa core with no board support, a +good starting point for supporting your own target platform. Cadence +recommends doing functional development on the simulator because it +is easier to debug with, then move to a board if/when you need to test +hardware drivers or real-time performance. + +The provided makefile simplifies building FreeRTOS and the example +for your Xtensa configuration and platform (ISS, board, etc.). There +are detailed instructions in the comments at the top of the makefile. + +The makefiles work on Windows and Linux and support incremental builds. +The build for each Xtensa configuration and target platform is placed in +a subdirectory so several core and platform builds can co-exist even with +incremental rebuilds. You may specify the root of the build area (if tou +want it to be elsewhere than under the source tree) by defining BLDROOT +either in the make command or your shell environment. + + +Building the FreeRTOS Library +----------------------------- + +First, be sure you have installed Xtensa Tools and your processor +configuration, and be sure that Xtensa Tools are in your search path. +You can use xt-make, which comes with the Xtensa Tools, to run the +makefiles. + +Change directories to the Xtensa port directory: + +> cd lib/FreeRTOS/portable/XCC/Xtensa + +Now build the FreeRTOS RTOS as a library (libfreertos.a) as follows: + +> xt-make + +which by default builds for the simulator (TARGET=sim), or: + +> xt-make TARGET=board + +which builds for a supported board. Note that the board type does not +need to be specified when building the FreeRTOS library. + +If you are building for an Xtensa processor configuration that is not the +default you selected when you installed Xtensa Tools, you need to define the +environment variable XTENSA_CORE. If your configuration is not in the +default registry you selected when you installed Xtensa Tools, you also +need to define the environment variable XTENSA_SYSTEM. See tools manuals. +You can avoid defining these in your environment if you pass the variables +you need to redefine into xt-make as follows: + +> xt-make XTENSA_CORE= XTENSA_SYSTEM= ... + +There are more details about build options in the comment in the Makefile. + +After the library has been built, you must link your application with this +library in order to use FreeRTOS. + + +Building the FreeRTOS Examples +------------------------------ + +The provided examples are designed to run on the Xtensa instruction set +simulator (ISS) or a supported evaluation board programmed with your +Xtensa processor configuration. + +To build the examples for the default platform (simulator): + +> cd demos/cadence/sim + +> xt-make all + +which is the same as + +> xt-make all TARGET=sim + +The boards currently supported are the Xilinx ML605 and KC705 FPGA +development boards. To target these boards, type + +> xt-make all TARGET=ml605 + +or + +> xt-make all TARGET=kc705 + +To build in a location other than the default, specify the new location +using the BLDROOT variable. Note that this makefile will invoke the +FreeRTOS library build makefile automatically, passing on the relevant +parameters based on what you specified. + +You can override the default compilation options by specifying the new +options via CFLAGS. For example: + +> xt-make all TARGET=sim CFLAGS="-O2 -Os -g" + +This compiles the examples and links them with the FreeRTOS library +libfreertos.a and the appropriate linker-support package (LSP) for your +target platform (you can override the LSP by adding LSP= to the +xt-make command line). The resulting ELF files can be downloaded and +executed on the target. The example binaries appear in the platform +specific subdirectory described earlier. + +To build your application with thread-safe C library support, you +need to make certain modifications to the application to plug in and +invoke the reentrancy support. This allows each task to use the library +without interference with other tasks (it is not safe for interrupt +handlers to call the C library). + +First, you must define + + XT_USE_THREAD_SAFE_CLIB + +to a nonzero value either in xtensa_config.h or on the compiler's command +line. Note that the default xtensa_config.h provided with this port does +define this to 1 if either newlib or xclib is detected. + +Then, you must also make sure to allocate extra space on the stack for +each task that will use the C library reentrant functions. This extra +space is to be allocated over and above the actual stack space required +by the task itself. The define + + XT_STACK_EXTRA_CLIB + +specifies the amount of extra space to be added on to the stack to allow +saving the context for the C library as well as the coprocessors if any. +E.g. if your task requires 2000 bytes of stack space, you must allocate +(2000 + XT_STACK_EXTRA_CLIB) bytes for the stack. + + +IMPORTANT NOTE +-------------- + +The header file FreeRTOS.h, which is a part of the core FreeRTOS sources, +includes if thread safety for the C libraries is enabled. For +xclib, this file exists in and so is reported as missing. +To work around this, the makefiles supplied with this port will copy the +reent.h header into the build directory during the build process. If you +use a different build process, then you must make sure to copy this file +to a location that is included in the list of include paths. This can be +the build directory or the directory that contains the Xtensa port source +files. + + +Running or Debugging an Application +----------------------------------- + +To execute the example application on the simulator: + +> xt-run [--turbo] example.exe + +The option --turbo provides much faster, but non-cycle-accurate simulation +(the --turbo option is only available with Xtensa Tools version 7 or later). + + +To execute on the simulator using the Xplorer GUI based debugger: + +> xplorer --debug example.exe + + +To execute on a supported evaluation board, download example.exe per +instructions in the tools manuals. Be sure the board has been programmed +with the correct configuration and is set up to boot from RAM and debug +a downloaded program! Optionally you may connect a terminal or terminal +emulator to the serial port on the board with settings as described in +the board user manual, and see the output of printf on the terminal. + +To obtain I/O on a "raw" platform such as an unsupported board, you need +to provide low level I/O drivers (eg. inbyte() and outbyte() for character +I/O if you want to use printf etc.). You can run "raw" executables on +any Xtensa platform, including simulator and any board, but you will not +see any behavior specific to the platform (eg. display, printed output, +stopping simulation at end of program). You can, while debugging, use a +debugger mechanism called GDBIO to obtain basic I/O. To use GDBIO, link +with the gdbio LSP. Refer to Xtensa tools documentation for details. + + +Task Stack Sizes +---------------- + +The application must ensure that every task has enough space for its +stack. Each task needs enough space for its own use, its own interrupt +stack frame (defined in xtensa_context.h) and space to save coprocessor +state, if any. Several factors influence the size of the stack required, +including the compiler optimization level and the use of the C library. +Calls to standard output functions such as printf() can use up a lot of +stack space. The tool xt-stack-usage is helpful in determining safe stack +sizes for your application. + +Some macros are provided in xtensa_config.h to help determine the stack +size for tasks that do and do not use the C library. Use these as the +basis for each task's stack size. They are minimum requirements taking +into account your configuration and use of the C library. In particular, +the define + + XT_STACK_MIN_SIZE + +defines the minimum stack size for any task. Be very careful if you try +to use a stack size smaller than this minimum. Stack overruns can cause +all kinds of hard-to-debug errors. It is recommended that you enable the +FreeRTOS stack checking features during development. + +WARNING: The newlib printf() function uses a lot of stack space. Be very +careful in using it. Optionally you can use the 'libxtutil' library for +output - it implements a subset of printf() that has smaller code size +and uses far less stack space. More information about this library is in +the Xtensa Tools documentation. + + +Interrupt Stack +--------------- + +Beginning with port version 1.2, the port uses a separate interrupt stack +for handling interrupts. Thus, it is no longer necessary for each task to +reserve space on its stack to handle interrupts. The size of the interrupt +stack is controlled by the parameter "configISR_STACK_SIZE" defined in +FreeRTOSConfig.h. Define this carefully to match your system requirements. + + +Assembler / Compiler Switches +----------------------------- + +The following are compiler switches are used by the provided +Makefile in building the FreeRTOS library and example application. +These can be modified by editing the Makefile or by overriding the +CFLAGS variable in the make command line, for example: + +> xt-make CFLAGS="-O2 -DXT_USE_THREAD_SAFE_CLIB" + + -g Specifies debug information. + -c Specifies object code generation. + -On Sets compiler optimization level n (default -O0). + -mlongcalls Allows assembler and linker to convert call + instructions to longer indirect call sequences + when target is out of range. + -x assembler-with-cpp Passes .s and .S files through C preprocessor. + -Dmacro Define a preprocessor macro with no value. + -Dmacro=value Define a preprocessor macro with a value. + +See the compiler / linker documentation for a full list of switches and +their use. + +Many definitions can be provided at compile-time via the -D option +without editing the source code. Here are some of the more useful ones: + + XT_USE_THREAD_SAFE_CLIB Enable support for the reentrancy to provide + thread-safety for the newlib and xclib libraries + supplied with Xtensa Tools. Default ON. + + Note, the follwing defines are unique to the Xtensa port so have names + beginning with "XT_". + + XT_SIMULATOR Set this if building to run on the simulator. + Takes advantage of certain simulator control + and reporting facilities, and adjusts timing + of periodic tick to provide a more acceptable + performance in simulation (see XT_CLOCK_FREQ). + Set by default unless PLATFORM is overridden. + + XT_BOARD Set this if building for a supported board. + Be sure to specify the correct LSP for the + board. See the example makefile for usage. + + XT_CLOCK_FREQ=freq Specifies the target processor's clock + frequency in Hz. Used primarily to set the + timer that generates the periodic interrupt. + Defaults are provided and may be edited in + xtensa_timer.h (see comments there also). + Default for simulator provides more acceptable + performance, but cannot provide real-time + performance due to variation in simulation + speed per host platform and insufficient + cycles between interrupts to process them. + Supported board platforms by default leave + this undefined and compute the clock frequency + at initialization unless this is explicitly + defined. + + XT_TICK_PER_SEC=n Specifies the frequency of the periodic tick. + + XT_TIMER_INDEX=n Specifies which timer to use for periodic tick. + Set this if your Xtensa processor configuration + provides more than one suitable timer and you + want to override the default. See xtensa_timer.h . + + XT_INTEXC_HOOKS Enables hooks in interrupt vector handlers + to support dynamic installation of exception + and interrupt handlers. Disabled by default. + + XT_USE_OVLY Enable code overlay support. It uses a mutex, + hence configUSE_MUTEX must be enabled. This + option is currently unsupported. + + XT_USE_SWPRI Enable software prioritization of interrupts. + Enabling this will prioritize interrupts with + higher bit numbers over those with lower bit + numbers at the same level. This works only for + low and medium priority interrupts that can be + dispatched to C handlers. + + +Register Usage and Stack Frames +------------------------------- + +The Xtensa architecture specifies two ABIs that determine how the general +purpose registers a0-a15 are used: the standard windowed ABI use with +the Xtensa windowed register file architecture, and the optional and +more conventional Call0 ABI (required for Xtensa configurations without +a windowed register file). + +Xtensa processors may have other special registers (including co-processor +registers and other TIE "states") that are independent of this choice +of ABI. See Xtensa documentation for more details. + +In the windowed ABI the registers of the current window are used as follows: + a0 = return address + a1 = stack pointer (alias sp) + a2 = first argument and result of call (in simple cases) + a3-7 = second through sixth arguments of call (in simple cases). + Note that complex or large arguments are passed on the + stack. Details are in the Xtensa Tools manuals. + a8-a15 = available for use as temporaries. +There are no callee-save registers. The windowed hardware automatically +saves registers a0-a3 on a call4, a0-a8 on a call8, a0-a12 on a call12, +by rotating the register window. Hardware triggers window overflow and +underflow exceptions as necessary when registers outside the current +window need to be spilled to preallocated space in the stack frame, or +restored. Complete details are in the Xtensa manuals. The entire windowed +register file is saved and restored on interrupt or task context switch. + +The Call0 ABI does not make use of register windows, relying instead +on a fixed set of 16 registers without window rotation. +The Call0 ABI is more conventional and uses registers as follows: + a0 = return address + a1 = stack pointer (alias sp) + a2 = first argument and result of call (in simple cases) + a3-7 = second through sixth arguments of call (in simple cases). + Note that complex or large arguments are passed on the + stack. Details are in the Xtensa Tools manuals. + a8-a11 = scratch. + a12-a15 = callee-save (a function must preserve these for its caller). +On a FreeRTOS API call, callee-save registers are saved only when a task +context switch occurs, and other registers are not saved at all (the caller +does not expect them to be preserved). On an interrupt, callee-saved +registers might only be saved and restored when a task context-switch +occurs, but all other registers are always saved and restored. + +An Xtensa processor has other special registers independent of the ABI, +depending on the configuration (including co-processor registers and other +TIE state) that are part of the task context. FreeRTOS preserves all such +registers over an unsolicited context-switch triggered by an interrupt. +However it does NOT preserve these over a solicited context-switch during +a FreeRTOS API call. This bears some explanation. These special registers +are either ignored by the compiler or treated as caller-saved, meaning +that if kept "live" over a function call (ie. need to be preserved) +they must be saved and restored by the caller. Since solicited entry to +FreeRTOS is always made by a function call, FreeRTOS assumes the caller +has saved any of these registers that are "live". FreeRTOS avoids a lot +of overhead by not having to save and restore every special register +(there can be many) on every solicited context switch. + +As a consequence, the application developer should NOT assume that special +registers are preserved over a FreeRTOS API call such as vTaskDelay(). +If multiple tasks use a register, the caller must save and restore it. + +The saved context stack frames for context switches that occur as +a result of interrupt handling (interrupt frame) or from task-level +API calls (solicited frame) are described in human readable form in +xtensa_context.h . All suspended tasks have one of these two types +of stack frames. The top of the suspended task's stack is pointed to +by pxCurrentTCB->pxTopOfStack. A special location common to both stack +frames differentiates solicited and interrupt stack frames. + + +Improving Performance, Footprint, or Ease of Debugging +------------------------------------------------------ + +By default FreeRTOS for Xtensa is built with debug (-g) and without +compiler optimizations (-O0). This makes debugging easier. Of course, +-O0 costs performance and usually also increases stack usage. To make +FreeRTOS run faster you can change the Makefile to enable the desired +optimizations or set a predefined optimization level (-O) . + +Maximum performance is achieved with -O3 -ipa, but that might increase +the footprint substantially. A good compromise is -O2. See the compiler +manual for details. + +Minimal footprint is achieved by optimizing for space with -Os, at the +cost of some performance. See the compiler manual for details. + +The Xtensa architecture port-specific assembly files are coded with no +file-scope labels inside functions (all labels inside functions begin with +".L"). This allows a profiler to accurately associate an address with a +function, and also allows the debugger's stack trace to show the correct +function wherever the program counter is within that function. However +there are some tradeoffs in debugging. Local (".L") labels are not +visible to the debugger, so the following limitations may be observed +during debugging: +- You cannot set a breakpoint on a local label inside a function. +- Disassembly will show the entire function, but will get out of sync and + show incorrect opcodes if it crosses any padding before an aligned local + branch target (".L" label, not ".Ln"). Restart disassembly specifying an + address range explicitly between points where there is padding. +Since FreeRTOS is provided in source form, it is not difficult to remove +the ".L" and ".Ln" prefixes from local labels if you want them visible. +They can also be made visible by passing the '-L' option to the assembler +and linker (see the assembler and linker manuals for details). + + +Interrupt and Exception Handling +-------------------------------- + +FreeRTOS provides a complete set of efficient exception and first-level +interrupt handlers installed at the appropriate exception and interrupt +vector locations. The Xtensa architecture supports several different +classes of exceptions and interrupts. Being a configurable architecture, +many of these are optional, and the vector locations are determined by +your processor configuration. (Note that Diamond cores are pre-configured +with specific vector locations.) The handlers provided use conditional +compilation to adapt to your processor configuration and include only +the code that is needed. + +Xtensa vector locations may reside almost anywhere, including in ROM. +The amount of code space available at each of these locations is +often very small (e.g. due to following vectors). A small stub of +code installed at the vector jumps to the corresponding handler, +usually in RAM. The exception and interrupt handlers are defined in +xtensa_vectors.S. They are not specific to FreeRTOS, but call into +FreeRTOS where appropriate via macros defined in xtensa_rtos.h . + +The handlers provided for low and medium priority interrupts are just +dispatchers that save relevant state and call user-definable handlers. +See the files xtensa_vectors.S and xtensa_api.h for more details of how +to create and install application-specific user interrupt handlers. +Similarly, user-defined handlers can be installed for exceptions (other +than a few which are always handled by the OS). + +The high priority interrupt handlers provided may be considered templates +into which the application adds code to service specific interrupts. +The places where application handlers should be inserted are tagged with +the comment "USER_EDIT" in xtensa_vectors.S. + +This FreeRTOS port supports strict priority-based nesting of interrupts. +An interrupt may only nest on top of one of strictly lower priority. +Equal priority interrupts concurrently pending are handled in an +application-defined sequence before any lower priority interrupts +are handled. During interrupt and exception handling, the processor's +interrupt level (PS.INTLEVEL) is used to control the interrupt priority +level that can be accepted; interrupt sources are not controlled +individually by FreeRTOS (the application is free to access the INTENABLE +register directly to enable/disable individual interrupts, eg. using +Xtensa HAL services). This approach provides the most deterministic +bounds on interrupt latency (for a given priority) and stack depth. + +Software prioritization of interrupts at the same priority is controlled +by the definition of XT_USE_SWPRI. See above for a description of this +parameter. + +The following subsections describe the handling of each class of exception +and interrupt in more detail. Many have nothing to do with FreeRTOS but +are mentioned because there is code to handle them in xtensa_vectors.S. + +User Exception and Interrupt Handler (Low/Medium Priority): + + All Xtensa 'general exceptions' come to the user, kernel, or double + exception vector. The exception type is identified by the EXCCAUSE + special register (level 1 interrupts are one particular cause of a + general exception). This port sets up PS to direct all such exceptions + to the user vector. Exceptions taken at the other two vectors usually + indicate a kernel or application bug. + + Level 1 interrupts are identified at the beginning of the handler + and are dispatched to a dedicated handler. Then, syscall and alloca + exceptions are identified and dispatched to special handlers described + below. After this, coprocessor exceptions are identified and dispatched + to the coprocessor handler. + + Any remaining exceptions are processed as follows: + + Having allocated the exception stack frame, the user exception handler + saves the current task state and sets up a C environment and enables + the high-priority class of interrupts (which do not interact with + FreeRTOS), then reads EXCCAUSE and uses the cause (number) to index + into a table of user-specified handlers. The correct handler is then + called. If the handler returns, the context is restored and control is + returned to the code that caused the exception. The user-defined handler + may alter the saved context, or any other system state, that allows the + faulting instruction to be retried. + + If the cause is a level 1 (low-priority) or medium-priority interrupt, + the handler enables all interrupts above that priority level after + saving the task context. It then sets up the environment for C code + and then calls the handler (found in the handler table) for the + interrupt number. If the user has not specified a handler, then the + default handler will be called, which will terminate the program. + + If the interrupt is for the system timer, it calls a special interrupt + handler for the system timer tick, which calls _frxt_timer_int then + clears its bit from the mask. This interrupt cannot be hooked by the + user-defined handler. + + Finally, the handler calls _frxt_int_exit to allow FreeRTOS to perform + any scheduling necessary and return either to the interrupted task + or another. + + If software prioritization is enabled, the handler will re-enable all + interrupts at the same level that are numerically higher than the current + one, before calling the user handler. This allows a higher priority + interrupt to pre-empt the lower priority handler. + +Medium Priority Interrupt Handlers: + + Medium priority interrupts are those at levels 2 up to XCHAL_EXCM_LEVEL, + a configuration-specific maximum interrupt level affected by the global + 'exception mode' bit in the processor status word (PS.EXCM). + Interrupt levels above XCHAL_EXCM_LEVEL are of the high-priority class. + The Xtensa hardware documentation considers medium priority interrupts + to be a special case of high-priority interrupts, but from a software + perspective they are very different. + + Dispatch of medium-priority interrupts is discussed in the section + above. + +High Priority Interrupt Handlers: + + High priority interrupts are those strictly above XCHAL_EXCM_LEVEL, + a configuration-specific maximum interrupt level affected by the + global 'exception mode' bit in the processor status word (PS.EXCM). + High priority handlers may not directly interact with FreeRTOS at all, + and are described here only for the sake of completeness. They must + be coded in assembler (may not be coded in C) and are intended to be + used for handling extremely high frequency hardware events that need + to be handled in only a few cycles. A high priority interrupt handler + may trigger a software interrupt at a medium or low priority level to + occasionally signal FreeRTOS. Please see Xtensa documentation. + + There is a separate vector and a few special registers for each high + priority interrupt, providing for fast dispatch and efficient nesting + on top of lower priority interrupts. Handlers are templates included + only for the vectors that exist in your Xtensa processor configuration. + These templates are written for only one interrupt per high priority + level to minimize latency servicing very fast time-critical interrupts. + The vector code jumps to the corresponding first-level interrupt handler, + which then executes application-provided assembler code before returning + quickly to the interrupted task or lower priority handler. + +Kernel Exception Handler: + + Kernel mode is not used in this port of FreeRTOS, and therefore kernel + exceptions should not happen. A stub is provided for the vector that + triggers the debugger (if connected) or calls _xt_panic to freeze the + processor should a kernel exception occur. + +Alloca Exception Handler: + + Alloca exceptions are generated by the 'movsp' instruction, which + is used only in the windowed ABI. Its purpose is to allocate some + space on top of the stack. Because the window hardware may have + spilled some registers to the 16 byte "base save" area below the + stack pointer, it is necessary to protect those values. The alloca + handler accomplishes this quickly without setting up an interrupt + frame or entering FreeRTOS, by emulating a register underflow and + re-executing 'movsp'. + +Syscall Exception Handler: + + Syscall exceptions are generated by a 'syscall' instruction. + The windowed ABI specifies that executing this instruction with + a value of zero in register a2 must spill any unsaved registers + in the windowed register file to their pre-determined locations + on the caller's stack. The handler does exactly that, and skips + over the 'syscall' instruction before returning to the caller. + If a2 is non-zero, the handler returns a2 == -1 to the caller. + +Co-Processor Exception Handler: + + A co-processor exception is generated when a task accesses a + co-processor that it does not "own". Ownership represents which + task's state is currently in the co-processor. Co-processors are + context-switched "lazily" (on demand) only when a non-owning task + uses a co-processor instruction, otherwise a task retains ownership + even when it is preempted from the main processor. The co-processor + exception handler performs the context-switch and manages ownership. + + Co-processors may not be used by any code outside the context of a + task. A co-processor exception triggered by code that is not part + of a running task is a fatal error and FreeRTOS for Xtensa will panic. + This restriction is intended to reduce the overhead of saving and + restoring co-processor state (which can be quite large) and in + particular remove that overhead from interrupt handlers. + +Debug Exception Handler: + + A debug exception is caused as a result of running code, such as by + a 'break' instruction or hardware breakpoints and watchpoints, or + as a result of an external debug interrupt, such as from an OCD based + debugger or multiprocessor debug events ("breakin/breakout"). If the + processor is running in OCD mode under control of an OCD-based debugger, + the trigger event immediately halts the processor and gives control to + the OCD debugger. Otherwise control is transferred to the debug vector. + The debug vector handler calls the simulator if running on the ISS, + which then takes control and interacts with any attached debugger. + If running on hardware and not in OCD mode, debug exceptions are not + expected, so the debug handler calls _xt_panic to freeze the processor. + +Double Exception Handler: + + A double exception is a general exception that happens while the + processor is in exception mode (PS.EXCM set), and thus indicates a + bug in kernel code. The double exception vector handler triggers + the debugger (if connected) or calls _xt_panic to freeze the + processor. + +Window Overflow and Underflow Exception Handlers: + + Window overflow and underflow handlers are required for use of the + windowed ABI. Each has its own dedicated vector and highly optimized + code that is independent of OS. See Xtensa documentation for details. + +Hooks for Dynamic Installation of Handlers: + + Optional hooks are provided in the user exception and low level + interrupt handler and all medium and high priority interrupt handlers, + to dynamically install a handler function (which may be coded in C, + unless in a high-priority interrupt handler). These hooks are enabled + and used by automatic regression tests, they are not part of a normal + FreeRTOS build. However an application is free to take advantage of + them. The interrupt/exception hooks are described in xtensa_rtos.h . + + It is recommended that the application not make use of these hooks, but + rather use xt_set_interrupt_handler() and xt_set_exception_handler() + to install application-specific handlers. This method is more convenient + and allows arguments to be passed to the handlers. Software prioritization + of interrupts works only with this method. See xtensa_api.h for details. + +Overlay Support + + Code overlays are currently not supported for FreeRTOS. This will be + supported in a future release. Make sure that the option XT_USE_OVLY is + never defined when building. + + +-End- + diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_api.h b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_api.h new file mode 100644 index 000000000..11f5dc254 --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_api.h @@ -0,0 +1,122 @@ +/******************************************************************************* +Copyright (c) 2006-2015 Cadence Design Systems Inc. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +******************************************************************************/ + +/****************************************************************************** + Xtensa-specific API for RTOS ports. +******************************************************************************/ + +#ifndef __XTENSA_API_H__ +#define __XTENSA_API_H__ + +#include + +#include "xtensa_context.h" + + +/* Typedef for C-callable interrupt handler function */ +typedef void (*xt_handler)(void *); + +/* Typedef for C-callable exception handler function */ +typedef void (*xt_exc_handler)(XtExcFrame *); + + +/* +------------------------------------------------------------------------------- + Call this function to set a handler for the specified exception. + + n - Exception number (type) + f - Handler function address, NULL to uninstall handler. + + The handler will be passed a pointer to the exception frame, which is created + on the stack of the thread that caused the exception. + + If the handler returns, the thread context will be restored and the faulting + instruction will be retried. Any values in the exception frame that are + modified by the handler will be restored as part of the context. For details + of the exception frame structure see xtensa_context.h. +------------------------------------------------------------------------------- +*/ +extern xt_exc_handler xt_set_exception_handler(int n, xt_exc_handler f); + + +/* +------------------------------------------------------------------------------- + Call this function to set a handler for the specified interrupt. + + n - Interrupt number. + f - Handler function address, NULL to uninstall handler. + arg - Argument to be passed to handler. +------------------------------------------------------------------------------- +*/ +extern xt_handler xt_set_interrupt_handler(int n, xt_handler f, void * arg); + + +/* +------------------------------------------------------------------------------- + Call this function to enable the specified interrupts. + + mask - Bit mask of interrupts to be enabled. + + Returns the previous state of the interrupt enables. +------------------------------------------------------------------------------- +*/ +extern unsigned int xt_ints_on(unsigned int mask); + + +/* +------------------------------------------------------------------------------- + Call this function to disable the specified interrupts. + + mask - Bit mask of interrupts to be disabled. + + Returns the previous state of the interrupt enables. +------------------------------------------------------------------------------- +*/ +extern unsigned int xt_ints_off(unsigned int mask); + + +/* +------------------------------------------------------------------------------- + Call this function to set the specified (s/w) interrupt. +------------------------------------------------------------------------------- +*/ +static inline void xt_set_intset(unsigned int arg) +{ + xthal_set_intset(arg); +} + + +/* +------------------------------------------------------------------------------- + Call this function to clear the specified (s/w or edge-triggered) + interrupt. +------------------------------------------------------------------------------- +*/ +static inline void xt_set_intclear(unsigned int arg) +{ + xthal_set_intclear(arg); +} + + +#endif /* __XTENSA_API_H__ */ + diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_config.h b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_config.h new file mode 100644 index 000000000..8b133aeb7 --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_config.h @@ -0,0 +1,182 @@ +/******************************************************************************* +// Copyright (c) 2003-2015 Cadence Design Systems, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining +// a copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to +// permit persons to whom the Software is furnished to do so, subject to +// the following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +-------------------------------------------------------------------------------- + + Configuration-specific information for Xtensa build. This file must be + included in FreeRTOSConfig.h to properly set up the config-dependent + parameters correctly. + + NOTE: To enable thread-safe C library support, XT_USE_THREAD_SAFE_CLIB must + be defined to be > 0 somewhere above or on the command line. + +*******************************************************************************/ + +#ifndef XTENSA_CONFIG_H +#define XTENSA_CONFIG_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include +#include +#include /* required for XSHAL_CLIB */ + +#include "xtensa_context.h" + + +/*----------------------------------------------------------------------------- +* STACK REQUIREMENTS +* +* This section defines the minimum stack size, and the extra space required to +* be allocated for saving coprocessor state and/or C library state information +* (if thread safety is enabled for the C library). The sizes are in bytes. +* +* Stack sizes for individual tasks should be derived from these minima based on +* the maximum call depth of the task and the maximum level of interrupt nesting. +* A minimum stack size is defined by XT_STACK_MIN_SIZE. This minimum is based +* on the requirement for a task that calls nothing else but can be interrupted. +* This assumes that interrupt handlers do not call more than a few levels deep. +* If this is not true, i.e. one or more interrupt handlers make deep calls then +* the minimum must be increased. +* +* If the Xtensa processor configuration includes coprocessors, then space is +* allocated to save the coprocessor state on the stack. +* +* If thread safety is enabled for the C runtime library, (XT_USE_THREAD_SAFE_CLIB +* is defined) then space is allocated to save the C library context in the TCB. +* +* Allocating insufficient stack space is a common source of hard-to-find errors. +* During development, it is best to enable the FreeRTOS stack checking features. +* +* Usage: +* +* XT_USE_THREAD_SAFE_CLIB -- Define this to a nonzero value to enable thread-safe +* use of the C library. This will require extra stack +* space to be allocated for tasks that use the C library +* reentrant functions. See below for more information. +* +* NOTE: The Xtensa toolchain supports multiple C libraries and not all of them +* support thread safety. Check your core configuration to see which C library +* was chosen for your system. +* +* XT_STACK_MIN_SIZE -- The minimum stack size for any task. It is recommended +* that you do not use a stack smaller than this for any +* task. In case you want to use stacks smaller than this +* size, you must verify that the smaller size(s) will work +* under all operating conditions. +* +* XT_STACK_EXTRA -- The amount of extra stack space to allocate for a task +* that does not make C library reentrant calls. Add this +* to the amount of stack space required by the task itself. +* +* XT_STACK_EXTRA_CLIB -- The amount of space to allocate for C library state. +* +-----------------------------------------------------------------------------*/ + +/* Extra space required for interrupt/exception hooks. */ +#ifdef XT_INTEXC_HOOKS + #ifdef __XTENSA_CALL0_ABI__ + #define STK_INTEXC_EXTRA 0x200 + #else + #define STK_INTEXC_EXTRA 0x180 + #endif +#else + #define STK_INTEXC_EXTRA 0 +#endif + +/* Check C library thread safety support and compute size of C library save area. + For the supported libraries, we enable thread safety by default, and this can + be overridden from the compiler/make command line. */ +#if (XSHAL_CLIB == XTHAL_CLIB_NEWLIB) || (XSHAL_CLIB == XTHAL_CLIB_XCLIB) + #ifndef XT_USE_THREAD_SAFE_CLIB + #define XT_USE_THREAD_SAFE_CLIB 1 + #endif +#else + #define XT_USE_THREAD_SAFE_CLIB 0 +#endif + +#if XT_USE_THREAD_SAFE_CLIB > 0u + #if XSHAL_CLIB == XTHAL_CLIB_XCLIB + #define XT_HAVE_THREAD_SAFE_CLIB 1 + #if !defined __ASSEMBLER__ + #include + #define XT_CLIB_CONTEXT_AREA_SIZE ((sizeof(struct _reent) + 15) + (-16)) + #define XT_CLIB_GLOBAL_PTR _reent_ptr + #define _REENT_INIT_PTR _init_reent + #define _impure_ptr _reent_ptr + + void _reclaim_reent(void * ptr); + #endif + #elif XSHAL_CLIB == XTHAL_CLIB_NEWLIB + #define XT_HAVE_THREAD_SAFE_CLIB 1 + #if !defined __ASSEMBLER__ + #include + #define XT_CLIB_CONTEXT_AREA_SIZE ((sizeof(struct _reent) + 15) + (-16)) + #define XT_CLIB_GLOBAL_PTR _impure_ptr + #endif + #else + #define XT_HAVE_THREAD_SAFE_CLIB 0 + #error The selected C runtime library is not thread safe. + #endif +#else + #define XT_CLIB_CONTEXT_AREA_SIZE 0 +#endif + +/*------------------------------------------------------------------------------ + Extra size -- interrupt frame plus coprocessor save area plus hook space. + NOTE: Make sure XT_INTEXC_HOOKS is undefined unless you really need the hooks. +------------------------------------------------------------------------------*/ +#ifdef __XTENSA_CALL0_ABI__ + #define XT_XTRA_SIZE (XT_STK_FRMSZ + STK_INTEXC_EXTRA + 0x10 + XT_CP_SIZE) +#else + #define XT_XTRA_SIZE (XT_STK_FRMSZ + STK_INTEXC_EXTRA + 0x20 + XT_CP_SIZE) +#endif + +/*------------------------------------------------------------------------------ + Space allocated for user code -- function calls and local variables. + NOTE: This number can be adjusted to suit your needs. You must verify that the + amount of space you reserve is adequate for the worst-case conditions in your + application. + NOTE: The windowed ABI requires more stack, since space has to be reserved + for spilling register windows. +------------------------------------------------------------------------------*/ +#ifdef __XTENSA_CALL0_ABI__ + #define XT_USER_SIZE 0x200 +#else + #define XT_USER_SIZE 0x400 +#endif + +/* Minimum recommended stack size. */ +#define XT_STACK_MIN_SIZE ((XT_XTRA_SIZE + XT_USER_SIZE) / sizeof(unsigned char)) + +/* OS overhead with and without C library thread context. */ +#define XT_STACK_EXTRA (XT_XTRA_SIZE) +#define XT_STACK_EXTRA_CLIB (XT_XTRA_SIZE + XT_CLIB_CONTEXT_AREA_SIZE) + + +#ifdef __cplusplus +} +#endif + +#endif /* XTENSA_CONFIG_H */ + diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_context.S b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_context.S new file mode 100644 index 000000000..812f9b972 --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_context.S @@ -0,0 +1,624 @@ +/******************************************************************************* +Copyright (c) 2006-2015 Cadence Design Systems Inc. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +-------------------------------------------------------------------------------- + + XTENSA CONTEXT SAVE AND RESTORE ROUTINES + +Low-level Call0 functions for handling generic context save and restore of +registers not specifically addressed by the interrupt vectors and handlers. +Those registers (not handled by these functions) are PC, PS, A0, A1 (SP). +Except for the calls to RTOS functions, this code is generic to Xtensa. + +Note that in Call0 ABI, interrupt handlers are expected to preserve the callee- +save regs (A12-A15), which is always the case if the handlers are coded in C. +However A12, A13 are made available as scratch registers for interrupt dispatch +code, so are presumed saved anyway, and are always restored even in Call0 ABI. +Only A14, A15 are truly handled as callee-save regs. + +Because Xtensa is a configurable architecture, this port supports all user +generated configurations (except restrictions stated in the release notes). +This is accomplished by conditional compilation using macros and functions +defined in the Xtensa HAL (hardware adaptation layer) for your configuration. +Only the processor state included in your configuration is saved and restored, +including any processor state added by user configuration options or TIE. + +*******************************************************************************/ + +/* Warn nicely if this file gets named with a lowercase .s instead of .S: */ +#define NOERROR # +NOERROR: .error "C preprocessor needed for this file: make sure its filename\ + ends in uppercase .S, or use xt-xcc's -x assembler-with-cpp option." + + +#include "xtensa_rtos.h" + +#ifdef XT_USE_OVLY +#include +#endif + + .text + +/******************************************************************************* + +_xt_context_save + + !! MUST BE CALLED ONLY BY 'CALL0' INSTRUCTION !! + +Saves all Xtensa processor state except PC, PS, A0, A1 (SP), A12, A13, in the +interrupt stack frame defined in xtensa_rtos.h. +Its counterpart is _xt_context_restore (which also restores A12, A13). + +Caller is expected to have saved PC, PS, A0, A1 (SP), A12, A13 in the frame. +This function preserves A12 & A13 in order to provide the caller with 2 scratch +regs that need not be saved over the call to this function. The choice of which +2 regs to provide is governed by xthal_window_spill_nw and xthal_save_extra_nw, +to avoid moving data more than necessary. Caller can assign regs accordingly. + +Entry Conditions: + A0 = Return address in caller. + A1 = Stack pointer of interrupted thread or handler ("interruptee"). + Original A12, A13 have already been saved in the interrupt stack frame. + Other processor state except PC, PS, A0, A1 (SP), A12, A13, is as at the + point of interruption. + If windowed ABI, PS.EXCM = 1 (exceptions disabled). + +Exit conditions: + A0 = Return address in caller. + A1 = Stack pointer of interrupted thread or handler ("interruptee"). + A12, A13 as at entry (preserved). + If windowed ABI, PS.EXCM = 1 (exceptions disabled). + +*******************************************************************************/ + + .global _xt_context_save + .type _xt_context_save,@function + .align 4 +_xt_context_save: + + s32i a2, sp, XT_STK_A2 + s32i a3, sp, XT_STK_A3 + s32i a4, sp, XT_STK_A4 + s32i a5, sp, XT_STK_A5 + s32i a6, sp, XT_STK_A6 + s32i a7, sp, XT_STK_A7 + s32i a8, sp, XT_STK_A8 + s32i a9, sp, XT_STK_A9 + s32i a10, sp, XT_STK_A10 + s32i a11, sp, XT_STK_A11 + + /* + Call0 ABI callee-saved regs a12-15 do not need to be saved here. + a12-13 are the caller's responsibility so it can use them as scratch. + So only need to save a14-a15 here for Windowed ABI (not Call0). + */ + #ifndef __XTENSA_CALL0_ABI__ + s32i a14, sp, XT_STK_A14 + s32i a15, sp, XT_STK_A15 + #endif + + rsr a3, SAR + s32i a3, sp, XT_STK_SAR + + #if XCHAL_HAVE_LOOPS + rsr a3, LBEG + s32i a3, sp, XT_STK_LBEG + rsr a3, LEND + s32i a3, sp, XT_STK_LEND + rsr a3, LCOUNT + s32i a3, sp, XT_STK_LCOUNT + #endif + + #if XT_USE_SWPRI + /* Save virtual priority mask */ + movi a3, _xt_vpri_mask + l32i a3, a3, 0 + s32i a3, sp, XT_STK_VPRI + #endif + + #if XCHAL_EXTRA_SA_SIZE > 0 || !defined(__XTENSA_CALL0_ABI__) + mov a9, a0 /* preserve ret addr */ + #endif + + #ifndef __XTENSA_CALL0_ABI__ + /* + To spill the reg windows, temp. need pre-interrupt stack ptr and a4-15. + Need to save a9,12,13 temporarily (in frame temps) and recover originals. + Interrupts need to be disabled below XCHAL_EXCM_LEVEL and window overflow + and underflow exceptions disabled (assured by PS.EXCM == 1). + */ + s32i a12, sp, XT_STK_TMP0 /* temp. save stuff in stack frame */ + s32i a13, sp, XT_STK_TMP1 + s32i a9, sp, XT_STK_TMP2 + + /* + Save the overlay state if we are supporting overlays. Since we just saved + three registers, we can conveniently use them here. Note that as of now, + overlays only work for windowed calling ABI. + */ + #ifdef XT_USE_OVLY + l32i a9, sp, XT_STK_PC /* recover saved PC */ + _xt_overlay_get_state a9, a12, a13 + s32i a9, sp, XT_STK_OVLY /* save overlay state */ + #endif + + l32i a12, sp, XT_STK_A12 /* recover original a9,12,13 */ + l32i a13, sp, XT_STK_A13 + l32i a9, sp, XT_STK_A9 + addi sp, sp, XT_STK_FRMSZ /* restore the interruptee's SP */ + call0 xthal_window_spill_nw /* preserves only a4,5,8,9,12,13 */ + addi sp, sp, -XT_STK_FRMSZ + l32i a12, sp, XT_STK_TMP0 /* recover stuff from stack frame */ + l32i a13, sp, XT_STK_TMP1 + l32i a9, sp, XT_STK_TMP2 + #endif + + #if XCHAL_EXTRA_SA_SIZE > 0 + /* + NOTE: Normally the xthal_save_extra_nw macro only affects address + registers a2-a5. It is theoretically possible for Xtensa processor + designers to write TIE that causes more address registers to be + affected, but it is generally unlikely. If that ever happens, + more registers need to be saved/restored around this macro invocation. + Here we assume a9,12,13 are preserved. + Future Xtensa tools releases might limit the regs that can be affected. + */ + addi a2, sp, XT_STK_EXTRA /* where to save it */ + # if XCHAL_EXTRA_SA_ALIGN > 16 + movi a3, -XCHAL_EXTRA_SA_ALIGN + and a2, a2, a3 /* align dynamically >16 bytes */ + # endif + call0 xthal_save_extra_nw /* destroys a0,2,3,4,5 */ + #endif + + #if XCHAL_EXTRA_SA_SIZE > 0 || !defined(__XTENSA_CALL0_ABI__) + mov a0, a9 /* retrieve ret addr */ + #endif + + ret + +/******************************************************************************* + +_xt_context_restore + + !! MUST BE CALLED ONLY BY 'CALL0' INSTRUCTION !! + +Restores all Xtensa processor state except PC, PS, A0, A1 (SP) (and in Call0 +ABI, A14, A15 which are preserved by all interrupt handlers) from an interrupt +stack frame defined in xtensa_rtos.h . +Its counterpart is _xt_context_save (whose caller saved A12, A13). + +Caller is responsible to restore PC, PS, A0, A1 (SP). + +Entry Conditions: + A0 = Return address in caller. + A1 = Stack pointer of interrupted thread or handler ("interruptee"). + +Exit conditions: + A0 = Return address in caller. + A1 = Stack pointer of interrupted thread or handler ("interruptee"). + Other processor state except PC, PS, A0, A1 (SP), is as at the point + of interruption. + +*******************************************************************************/ + + .global _xt_context_restore + .type _xt_context_restore,@function + .align 4 +_xt_context_restore: + + #if XCHAL_EXTRA_SA_SIZE > 0 + /* + NOTE: Normally the xthal_restore_extra_nw macro only affects address + registers a2-a5. It is theoretically possible for Xtensa processor + designers to write TIE that causes more address registers to be + affected, but it is generally unlikely. If that ever happens, + more registers need to be saved/restored around this macro invocation. + Here we only assume a13 is preserved. + Future Xtensa tools releases might limit the regs that can be affected. + */ + mov a13, a0 /* preserve ret addr */ + addi a2, sp, XT_STK_EXTRA /* where to find it */ + # if XCHAL_EXTRA_SA_ALIGN > 16 + movi a3, -XCHAL_EXTRA_SA_ALIGN + and a2, a2, a3 /* align dynamically >16 bytes */ + # endif + call0 xthal_restore_extra_nw /* destroys a0,2,3,4,5 */ + mov a0, a13 /* retrieve ret addr */ + #endif + + #if XCHAL_HAVE_LOOPS + l32i a2, sp, XT_STK_LBEG + l32i a3, sp, XT_STK_LEND + wsr a2, LBEG + l32i a2, sp, XT_STK_LCOUNT + wsr a3, LEND + wsr a2, LCOUNT + #endif + + #ifdef XT_USE_OVLY + /* + If we are using overlays, this is a good spot to check if we need + to restore an overlay for the incoming task. Here we have a bunch + of registers to spare. Note that this step is going to use a few + bytes of storage below SP (SP-20 to SP-32) if an overlay is going + to be restored. + */ + l32i a2, sp, XT_STK_PC /* retrieve PC */ + l32i a3, sp, XT_STK_PS /* retrieve PS */ + l32i a4, sp, XT_STK_OVLY /* retrieve overlay state */ + l32i a5, sp, XT_STK_A1 /* retrieve stack ptr */ + _xt_overlay_check_map a2, a3, a4, a5, a6 + s32i a2, sp, XT_STK_PC /* save updated PC */ + s32i a3, sp, XT_STK_PS /* save updated PS */ + #endif + + #ifdef XT_USE_SWPRI + /* Restore virtual interrupt priority and interrupt enable */ + movi a3, _xt_intdata + l32i a4, a3, 0 /* a4 = _xt_intenable */ + l32i a5, sp, XT_STK_VPRI /* a5 = saved _xt_vpri_mask */ + and a4, a4, a5 + wsr a4, INTENABLE /* update INTENABLE */ + s32i a5, a3, 4 /* restore _xt_vpri_mask */ + #endif + + l32i a3, sp, XT_STK_SAR + l32i a2, sp, XT_STK_A2 + wsr a3, SAR + l32i a3, sp, XT_STK_A3 + l32i a4, sp, XT_STK_A4 + l32i a5, sp, XT_STK_A5 + l32i a6, sp, XT_STK_A6 + l32i a7, sp, XT_STK_A7 + l32i a8, sp, XT_STK_A8 + l32i a9, sp, XT_STK_A9 + l32i a10, sp, XT_STK_A10 + l32i a11, sp, XT_STK_A11 + + /* + Call0 ABI callee-saved regs a12-15 do not need to be restored here. + However a12-13 were saved for scratch before XT_RTOS_INT_ENTER(), + so need to be restored anyway, despite being callee-saved in Call0. + */ + l32i a12, sp, XT_STK_A12 + l32i a13, sp, XT_STK_A13 + #ifndef __XTENSA_CALL0_ABI__ + l32i a14, sp, XT_STK_A14 + l32i a15, sp, XT_STK_A15 + #endif + + ret + + +/******************************************************************************* + +_xt_coproc_init + +Initializes global co-processor management data, setting all co-processors +to "unowned". Leaves CPENABLE as it found it (does NOT clear it). + +Called during initialization of the RTOS, before any threads run. + +This may be called from normal Xtensa single-threaded application code which +might use co-processors. The Xtensa run-time initialization enables all +co-processors. They must remain enabled here, else a co-processor exception +might occur outside of a thread, which the exception handler doesn't expect. + +Entry Conditions: + Xtensa single-threaded run-time environment is in effect. + No thread is yet running. + +Exit conditions: + None. + +Obeys ABI conventions per prototype: + void _xt_coproc_init(void) + +*******************************************************************************/ + +#if XCHAL_CP_NUM > 0 + + .global _xt_coproc_init + .type _xt_coproc_init,@function + .align 4 +_xt_coproc_init: + ENTRY0 + + /* Initialize thread co-processor ownerships to 0 (unowned). */ + movi a2, _xt_coproc_owner_sa /* a2 = base of owner array */ + addi a3, a2, XCHAL_CP_MAX << 2 /* a3 = top+1 of owner array */ + movi a4, 0 /* a4 = 0 (unowned) */ +1: s32i a4, a2, 0 + addi a2, a2, 4 + bltu a2, a3, 1b + + RET0 + +#endif + + +/******************************************************************************* + +_xt_coproc_release + +Releases any and all co-processors owned by a given thread. The thread is +identified by it's co-processor state save area defined in xtensa_context.h . + +Must be called before a thread's co-proc save area is deleted to avoid +memory corruption when the exception handler tries to save the state. +May be called when a thread terminates or completes but does not delete +the co-proc save area, to avoid the exception handler having to save the +thread's co-proc state before another thread can use it (optimization). + +Entry Conditions: + A2 = Pointer to base of co-processor state save area. + +Exit conditions: + None. + +Obeys ABI conventions per prototype: + void _xt_coproc_release(void * coproc_sa_base) + +*******************************************************************************/ + +#if XCHAL_CP_NUM > 0 + + .global _xt_coproc_release + .type _xt_coproc_release,@function + .align 4 +_xt_coproc_release: + ENTRY0 /* a2 = base of save area */ + + movi a3, _xt_coproc_owner_sa /* a3 = base of owner array */ + addi a4, a3, XCHAL_CP_MAX << 2 /* a4 = top+1 of owner array */ + movi a5, 0 /* a5 = 0 (unowned) */ + + rsil a6, XCHAL_EXCM_LEVEL /* lock interrupts */ + +1: l32i a7, a3, 0 /* a7 = owner at a3 */ + bne a2, a7, 2f /* if (coproc_sa_base == owner) */ + s32i a5, a3, 0 /* owner = unowned */ +2: addi a3, a3, 1<<2 /* a3 = next entry in owner array */ + bltu a3, a4, 1b /* repeat until end of array */ + +3: wsr a6, PS /* restore interrupts */ + + RET0 + +#endif + + +/******************************************************************************* +_xt_coproc_savecs + +If there is a current thread and it has a coprocessor state save area, then +save all callee-saved state into this area. This function is called from the +solicited context switch handler. It calls a system-specific function to get +the coprocessor save area base address. + +Entry conditions: + - The thread being switched out is still the current thread. + - CPENABLE state reflects which coprocessors are active. + - Registers have been saved/spilled already. + +Exit conditions: + - All necessary CP callee-saved state has been saved. + - Registers a2-a7, a13-a15 have been trashed. + +Must be called from assembly code only, using CALL0. +*******************************************************************************/ +#if XCHAL_CP_NUM > 0 + + .extern _xt_coproc_sa_offset /* external reference */ + + .global _xt_coproc_savecs + .type _xt_coproc_savecs,@function + .align 4 +_xt_coproc_savecs: + + /* At entry, CPENABLE should be showing which CPs are enabled. */ + + rsr a2, CPENABLE /* a2 = which CPs are enabled */ + beqz a2, .Ldone /* quick exit if none */ + mov a14, a0 /* save return address */ + call0 XT_RTOS_CP_STATE /* get address of CP save area */ + mov a0, a14 /* restore return address */ + beqz a15, .Ldone /* if none then nothing to do */ + s16i a2, a15, XT_CP_CS_ST /* save mask of CPs being stored */ + movi a13, _xt_coproc_sa_offset /* array of CP save offsets */ + l32i a15, a15, XT_CP_ASA /* a15 = base of aligned save area */ + +#if XCHAL_CP0_SA_SIZE + bbci.l a2, 0, 2f /* CP 0 not enabled */ + l32i a14, a13, 0 /* a14 = _xt_coproc_sa_offset[0] */ + add a3, a14, a15 /* a3 = save area for CP 0 */ + xchal_cp0_store a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +#if XCHAL_CP1_SA_SIZE + bbci.l a2, 1, 2f /* CP 1 not enabled */ + l32i a14, a13, 4 /* a14 = _xt_coproc_sa_offset[1] */ + add a3, a14, a15 /* a3 = save area for CP 1 */ + xchal_cp1_store a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +#if XCHAL_CP2_SA_SIZE + bbci.l a2, 2, 2f + l32i a14, a13, 8 + add a3, a14, a15 + xchal_cp2_store a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +#if XCHAL_CP3_SA_SIZE + bbci.l a2, 3, 2f + l32i a14, a13, 12 + add a3, a14, a15 + xchal_cp3_store a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +#if XCHAL_CP4_SA_SIZE + bbci.l a2, 4, 2f + l32i a14, a13, 16 + add a3, a14, a15 + xchal_cp4_store a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +#if XCHAL_CP5_SA_SIZE + bbci.l a2, 5, 2f + l32i a14, a13, 20 + add a3, a14, a15 + xchal_cp5_store a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +#if XCHAL_CP6_SA_SIZE + bbci.l a2, 6, 2f + l32i a14, a13, 24 + add a3, a14, a15 + xchal_cp6_store a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +#if XCHAL_CP7_SA_SIZE + bbci.l a2, 7, 2f + l32i a14, a13, 28 + add a3, a14, a15 + xchal_cp7_store a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +.Ldone: + ret +#endif + + +/******************************************************************************* +_xt_coproc_restorecs + +Restore any callee-saved coprocessor state for the incoming thread. +This function is called from coprocessor exception handling, when giving +ownership to a thread that solicited a context switch earlier. It calls a +system-specific function to get the coprocessor save area base address. + +Entry conditions: + - The incoming thread is set as the current thread. + - CPENABLE is set up correctly for all required coprocessors. + - a2 = mask of coprocessors to be restored. + +Exit conditions: + - All necessary CP callee-saved state has been restored. + - CPENABLE - unchanged. + - Registers a2-a7, a13-a15 have been trashed. + +Must be called from assembly code only, using CALL0. +*******************************************************************************/ +#if XCHAL_CP_NUM > 0 + + .global _xt_coproc_restorecs + .type _xt_coproc_restorecs,@function + .align 4 +_xt_coproc_restorecs: + + mov a14, a0 /* save return address */ + call0 XT_RTOS_CP_STATE /* get address of CP save area */ + mov a0, a14 /* restore return address */ + beqz a15, .Ldone2 /* if none then nothing to do */ + l16ui a3, a15, XT_CP_CS_ST /* a3 = which CPs have been saved */ + xor a3, a3, a2 /* clear the ones being restored */ + s32i a3, a15, XT_CP_CS_ST /* update saved CP mask */ + movi a13, _xt_coproc_sa_offset /* array of CP save offsets */ + l32i a15, a15, XT_CP_ASA /* a15 = base of aligned save area */ + +#if XCHAL_CP0_SA_SIZE + bbci.l a2, 0, 2f /* CP 0 not enabled */ + l32i a14, a13, 0 /* a14 = _xt_coproc_sa_offset[0] */ + add a3, a14, a15 /* a3 = save area for CP 0 */ + xchal_cp0_load a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +#if XCHAL_CP1_SA_SIZE + bbci.l a2, 1, 2f /* CP 1 not enabled */ + l32i a14, a13, 4 /* a14 = _xt_coproc_sa_offset[1] */ + add a3, a14, a15 /* a3 = save area for CP 1 */ + xchal_cp1_load a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +#if XCHAL_CP2_SA_SIZE + bbci.l a2, 2, 2f + l32i a14, a13, 8 + add a3, a14, a15 + xchal_cp2_load a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +#if XCHAL_CP3_SA_SIZE + bbci.l a2, 3, 2f + l32i a14, a13, 12 + add a3, a14, a15 + xchal_cp3_load a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +#if XCHAL_CP4_SA_SIZE + bbci.l a2, 4, 2f + l32i a14, a13, 16 + add a3, a14, a15 + xchal_cp4_load a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +#if XCHAL_CP5_SA_SIZE + bbci.l a2, 5, 2f + l32i a14, a13, 20 + add a3, a14, a15 + xchal_cp5_load a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +#if XCHAL_CP6_SA_SIZE + bbci.l a2, 6, 2f + l32i a14, a13, 24 + add a3, a14, a15 + xchal_cp6_load a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +#if XCHAL_CP7_SA_SIZE + bbci.l a2, 7, 2f + l32i a14, a13, 28 + add a3, a14, a15 + xchal_cp7_load a3, a4, a5, a6, a7 continue=0 ofs=-1 select=XTHAL_SAS_TIE|XTHAL_SAS_NOCC|XTHAL_SAS_CALE alloc=XTHAL_SAS_ALL +2: +#endif + +.Ldone2: + ret + +#endif + diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_context.h b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_context.h new file mode 100644 index 000000000..e370980bf --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_context.h @@ -0,0 +1,350 @@ +/******************************************************************************* +Copyright (c) 2006-2015 Cadence Design Systems Inc. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +-------------------------------------------------------------------------------- + + XTENSA CONTEXT FRAMES AND MACROS FOR RTOS ASSEMBLER SOURCES + +This header contains definitions and macros for use primarily by Xtensa +RTOS assembly coded source files. It includes and uses the Xtensa hardware +abstraction layer (HAL) to deal with config specifics. It may also be +included in C source files. + +!! Supports only Xtensa Exception Architecture 2 (XEA2). XEA1 not supported. !! + +NOTE: The Xtensa architecture requires stack pointer alignment to 16 bytes. + +*******************************************************************************/ + +#ifndef XTENSA_CONTEXT_H +#define XTENSA_CONTEXT_H + +#ifdef __ASSEMBLER__ +#include +#endif + +#include +#include +#include + + +/* Align a value up to nearest n-byte boundary, where n is a power of 2. */ +#define ALIGNUP(n, val) (((val) + (n)-1) & -(n)) + + +/* +------------------------------------------------------------------------------- + Macros that help define structures for both C and assembler. +------------------------------------------------------------------------------- +*/ +#if defined(_ASMLANGUAGE) || defined(__ASSEMBLER__) + +#define STRUCT_BEGIN .pushsection .text; .struct 0 +#define STRUCT_FIELD(ctype,size,asname,name) asname: .space size +#define STRUCT_AFIELD(ctype,size,asname,name,n) asname: .space (size)*(n) +#define STRUCT_END(sname) sname##Size:; .popsection + +#else + +#define STRUCT_BEGIN typedef struct { +#define STRUCT_FIELD(ctype,size,asname,name) ctype name; +#define STRUCT_AFIELD(ctype,size,asname,name,n) ctype name[n]; +#define STRUCT_END(sname) } sname; + +#endif //_ASMLANGUAGE || __ASSEMBLER__ + + +/* +------------------------------------------------------------------------------- + INTERRUPT/EXCEPTION STACK FRAME FOR A THREAD OR NESTED INTERRUPT + + A stack frame of this structure is allocated for any interrupt or exception. + It goes on the current stack. If the RTOS has a system stack for handling + interrupts, every thread stack must allow space for just one interrupt stack + frame, then nested interrupt stack frames go on the system stack. + + The frame includes basic registers (explicit) and "extra" registers introduced + by user TIE or the use of the MAC16 option in the user's Xtensa config. + The frame size is minimized by omitting regs not applicable to user's config. + + For Windowed ABI, this stack frame includes the interruptee's base save area, + another base save area to manage gcc nested functions, and a little temporary + space to help manage the spilling of the register windows. +------------------------------------------------------------------------------- +*/ + +STRUCT_BEGIN +STRUCT_FIELD (long, 4, XT_STK_EXIT, exit) /* exit point for dispatch */ +STRUCT_FIELD (long, 4, XT_STK_PC, pc) /* return PC */ +STRUCT_FIELD (long, 4, XT_STK_PS, ps) /* return PS */ +STRUCT_FIELD (long, 4, XT_STK_A0, a0) +STRUCT_FIELD (long, 4, XT_STK_A1, a1) /* stack pointer before interrupt */ +STRUCT_FIELD (long, 4, XT_STK_A2, a2) +STRUCT_FIELD (long, 4, XT_STK_A3, a3) +STRUCT_FIELD (long, 4, XT_STK_A4, a4) +STRUCT_FIELD (long, 4, XT_STK_A5, a5) +STRUCT_FIELD (long, 4, XT_STK_A6, a6) +STRUCT_FIELD (long, 4, XT_STK_A7, a7) +STRUCT_FIELD (long, 4, XT_STK_A8, a8) +STRUCT_FIELD (long, 4, XT_STK_A9, a9) +STRUCT_FIELD (long, 4, XT_STK_A10, a10) +STRUCT_FIELD (long, 4, XT_STK_A11, a11) +STRUCT_FIELD (long, 4, XT_STK_A12, a12) +STRUCT_FIELD (long, 4, XT_STK_A13, a13) +STRUCT_FIELD (long, 4, XT_STK_A14, a14) +STRUCT_FIELD (long, 4, XT_STK_A15, a15) +STRUCT_FIELD (long, 4, XT_STK_SAR, sar) +STRUCT_FIELD (long, 4, XT_STK_EXCCAUSE, exccause) +STRUCT_FIELD (long, 4, XT_STK_EXCVADDR, excvaddr) +#if XCHAL_HAVE_LOOPS +STRUCT_FIELD (long, 4, XT_STK_LBEG, lbeg) +STRUCT_FIELD (long, 4, XT_STK_LEND, lend) +STRUCT_FIELD (long, 4, XT_STK_LCOUNT, lcount) +#endif +#ifndef __XTENSA_CALL0_ABI__ +/* Temporary space for saving stuff during window spill */ +STRUCT_FIELD (long, 4, XT_STK_TMP0, tmp0) +STRUCT_FIELD (long, 4, XT_STK_TMP1, tmp1) +STRUCT_FIELD (long, 4, XT_STK_TMP2, tmp2) +#endif +#ifdef XT_USE_SWPRI +/* Storage for virtual priority mask */ +STRUCT_FIELD (long, 4, XT_STK_VPRI, vpri) +#endif +#ifdef XT_USE_OVLY +/* Storage for overlay state */ +STRUCT_FIELD (long, 4, XT_STK_OVLY, ovly) +#endif +STRUCT_END(XtExcFrame) + +#if defined(_ASMLANGUAGE) || defined(__ASSEMBLER__) +#define XT_STK_NEXT1 XtExcFrameSize +#else +#define XT_STK_NEXT1 sizeof(XtExcFrame) +#endif + +/* Allocate extra storage if needed */ +#if XCHAL_EXTRA_SA_SIZE != 0 + +#if XCHAL_EXTRA_SA_ALIGN <= 16 +#define XT_STK_EXTRA ALIGNUP(XCHAL_EXTRA_SA_ALIGN, XT_STK_NEXT1) +#else +/* If need more alignment than stack, add space for dynamic alignment */ +#define XT_STK_EXTRA (ALIGNUP(XCHAL_EXTRA_SA_ALIGN, XT_STK_NEXT1) + XCHAL_EXTRA_SA_ALIGN) +#endif +#define XT_STK_NEXT2 (XT_STK_EXTRA + XCHAL_EXTRA_SA_SIZE) + +#else + +#define XT_STK_NEXT2 XT_STK_NEXT1 + +#endif + +/* +------------------------------------------------------------------------------- + This is the frame size. Add space for 4 registers (interruptee's base save + area) and some space for gcc nested functions if any. +------------------------------------------------------------------------------- +*/ +#define XT_STK_FRMSZ (ALIGNUP(0x10, XT_STK_NEXT2) + 0x20) + + +/* +------------------------------------------------------------------------------- + SOLICITED STACK FRAME FOR A THREAD + + A stack frame of this structure is allocated whenever a thread enters the + RTOS kernel intentionally (and synchronously) to submit to thread scheduling. + It goes on the current thread's stack. + + The solicited frame only includes registers that are required to be preserved + by the callee according to the compiler's ABI conventions, some space to save + the return address for returning to the caller, and the caller's PS register. + + For Windowed ABI, this stack frame includes the caller's base save area. + + Note on XT_SOL_EXIT field: + It is necessary to distinguish a solicited from an interrupt stack frame. + This field corresponds to XT_STK_EXIT in the interrupt stack frame and is + always at the same offset (0). It can be written with a code (usually 0) + to distinguish a solicted frame from an interrupt frame. An RTOS port may + opt to ignore this field if it has another way of distinguishing frames. +------------------------------------------------------------------------------- +*/ + +STRUCT_BEGIN +#ifdef __XTENSA_CALL0_ABI__ +STRUCT_FIELD (long, 4, XT_SOL_EXIT, exit) +STRUCT_FIELD (long, 4, XT_SOL_PC, pc) +STRUCT_FIELD (long, 4, XT_SOL_PS, ps) +STRUCT_FIELD (long, 4, XT_SOL_NEXT, next) +STRUCT_FIELD (long, 4, XT_SOL_A12, a12) /* should be on 16-byte alignment */ +STRUCT_FIELD (long, 4, XT_SOL_A13, a13) +STRUCT_FIELD (long, 4, XT_SOL_A14, a14) +STRUCT_FIELD (long, 4, XT_SOL_A15, a15) +#else +STRUCT_FIELD (long, 4, XT_SOL_EXIT, exit) +STRUCT_FIELD (long, 4, XT_SOL_PC, pc) +STRUCT_FIELD (long, 4, XT_SOL_PS, ps) +STRUCT_FIELD (long, 4, XT_SOL_NEXT, next) +STRUCT_FIELD (long, 4, XT_SOL_A0, a0) /* should be on 16-byte alignment */ +STRUCT_FIELD (long, 4, XT_SOL_A1, a1) +STRUCT_FIELD (long, 4, XT_SOL_A2, a2) +STRUCT_FIELD (long, 4, XT_SOL_A3, a3) +#endif +STRUCT_END(XtSolFrame) + +/* Size of solicited stack frame */ +#define XT_SOL_FRMSZ ALIGNUP(0x10, XtSolFrameSize) + + +/* +------------------------------------------------------------------------------- + CO-PROCESSOR STATE SAVE AREA FOR A THREAD + + The RTOS must provide an area per thread to save the state of co-processors + when that thread does not have control. Co-processors are context-switched + lazily (on demand) only when a new thread uses a co-processor instruction, + otherwise a thread retains ownership of the co-processor even when it loses + control of the processor. An Xtensa co-processor exception is triggered when + any co-processor instruction is executed by a thread that is not the owner, + and the context switch of that co-processor is then peformed by the handler. + Ownership represents which thread's state is currently in the co-processor. + + Co-processors may not be used by interrupt or exception handlers. If an + co-processor instruction is executed by an interrupt or exception handler, + the co-processor exception handler will trigger a kernel panic and freeze. + This restriction is introduced to reduce the overhead of saving and restoring + co-processor state (which can be quite large) and in particular remove that + overhead from interrupt handlers. + + The co-processor state save area may be in any convenient per-thread location + such as in the thread control block or above the thread stack area. It need + not be in the interrupt stack frame since interrupts don't use co-processors. + + Along with the save area for each co-processor, two bitmasks with flags per + co-processor (laid out as in the CPENABLE reg) help manage context-switching + co-processors as efficiently as possible: + + XT_CPENABLE + The contents of a non-running thread's CPENABLE register. + It represents the co-processors owned (and whose state is still needed) + by the thread. When a thread is preempted, its CPENABLE is saved here. + When a thread solicits a context-swtich, its CPENABLE is cleared - the + compiler has saved the (caller-saved) co-proc state if it needs to. + When a non-running thread loses ownership of a CP, its bit is cleared. + When a thread runs, it's XT_CPENABLE is loaded into the CPENABLE reg. + Avoids co-processor exceptions when no change of ownership is needed. + + XT_CPSTORED + A bitmask with the same layout as CPENABLE, a bit per co-processor. + Indicates whether the state of each co-processor is saved in the state + save area. When a thread enters the kernel, only the state of co-procs + still enabled in CPENABLE is saved. When the co-processor exception + handler assigns ownership of a co-processor to a thread, it restores + the saved state only if this bit is set, and clears this bit. + + XT_CP_CS_ST + A bitmask with the same layout as CPENABLE, a bit per co-processor. + Indicates whether callee-saved state is saved in the state save area. + Callee-saved state is saved by itself on a solicited context switch, + and restored when needed by the coprocessor exception handler. + Unsolicited switches will cause the entire coprocessor to be saved + when necessary. + + XT_CP_ASA + Pointer to the aligned save area. Allows it to be aligned more than + the overall save area (which might only be stack-aligned or TCB-aligned). + Especially relevant for Xtensa cores configured with a very large data + path that requires alignment greater than 16 bytes (ABI stack alignment). +------------------------------------------------------------------------------- +*/ + +#if XCHAL_CP_NUM > 0 + +/* Offsets of each coprocessor save area within the 'aligned save area': */ +#define XT_CP0_SA 0 +#define XT_CP1_SA ALIGNUP(XCHAL_CP1_SA_ALIGN, XT_CP0_SA + XCHAL_CP0_SA_SIZE) +#define XT_CP2_SA ALIGNUP(XCHAL_CP2_SA_ALIGN, XT_CP1_SA + XCHAL_CP1_SA_SIZE) +#define XT_CP3_SA ALIGNUP(XCHAL_CP3_SA_ALIGN, XT_CP2_SA + XCHAL_CP2_SA_SIZE) +#define XT_CP4_SA ALIGNUP(XCHAL_CP4_SA_ALIGN, XT_CP3_SA + XCHAL_CP3_SA_SIZE) +#define XT_CP5_SA ALIGNUP(XCHAL_CP5_SA_ALIGN, XT_CP4_SA + XCHAL_CP4_SA_SIZE) +#define XT_CP6_SA ALIGNUP(XCHAL_CP6_SA_ALIGN, XT_CP5_SA + XCHAL_CP5_SA_SIZE) +#define XT_CP7_SA ALIGNUP(XCHAL_CP7_SA_ALIGN, XT_CP6_SA + XCHAL_CP6_SA_SIZE) +#define XT_CP_SA_SIZE ALIGNUP(16, XT_CP7_SA + XCHAL_CP7_SA_SIZE) + +/* Offsets within the overall save area: */ +#define XT_CPENABLE 0 /* (2 bytes) coprocessors active for this thread */ +#define XT_CPSTORED 2 /* (2 bytes) coprocessors saved for this thread */ +#define XT_CP_CS_ST 4 /* (2 bytes) coprocessor callee-saved regs stored for this thread */ +#define XT_CP_ASA 8 /* (4 bytes) ptr to aligned save area */ +/* Overall size allows for dynamic alignment: */ +#define XT_CP_SIZE (12 + XT_CP_SA_SIZE + XCHAL_TOTAL_SA_ALIGN) +#else +#define XT_CP_SIZE 0 +#endif + + +/* +------------------------------------------------------------------------------- + MACROS TO HANDLE ABI SPECIFICS OF FUNCTION ENTRY AND RETURN + + Convenient where the frame size requirements are the same for both ABIs. + ENTRY(sz), RET(sz) are for framed functions (have locals or make calls). + ENTRY0, RET0 are for frameless functions (no locals, no calls). + + where size = size of stack frame in bytes (must be >0 and aligned to 16). + For framed functions the frame is created and the return address saved at + base of frame (Call0 ABI) or as determined by hardware (Windowed ABI). + For frameless functions, there is no frame and return address remains in a0. + Note: Because CPP macros expand to a single line, macros requiring multi-line + expansions are implemented as assembler macros. +------------------------------------------------------------------------------- +*/ + +#ifdef __ASSEMBLER__ +#ifdef __XTENSA_CALL0_ABI__ + /* Call0 */ + #define ENTRY(sz) entry1 sz + .macro entry1 size=0x10 + addi sp, sp, -\size + s32i a0, sp, 0 + .endm + #define ENTRY0 + #define RET(sz) ret1 sz + .macro ret1 size=0x10 + l32i a0, sp, 0 + addi sp, sp, \size + ret + .endm + #define RET0 ret +#else + /* Windowed */ + #define ENTRY(sz) entry sp, sz + #define ENTRY0 entry sp, 0x10 + #define RET(sz) retw + #define RET0 retw +#endif +#endif + + +#endif /* XTENSA_CONTEXT_H */ + diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_init.c b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_init.c new file mode 100644 index 000000000..c064ee9cc --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_init.c @@ -0,0 +1,65 @@ +/******************************************************************************* +// Copyright (c) 2003-2015 Cadence Design Systems, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining +// a copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to +// permit persons to whom the Software is furnished to do so, subject to +// the following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +-------------------------------------------------------------------------------- + + XTENSA INITIALIZATION ROUTINES CODED IN C + +This file contains miscellaneous Xtensa RTOS-generic initialization functions +that are implemented in C. + +*******************************************************************************/ + + +#ifdef XT_BOARD +#include +#endif + +#include "xtensa_rtos.h" + +#ifdef XT_RTOS_TIMER_INT + +unsigned _xt_tick_divisor = 0; /* cached number of cycles per tick */ + +/* +Compute and initialize at run-time the tick divisor (the number of +processor clock cycles in an RTOS tick, used to set the tick timer). +Called when the processor clock frequency is not known at compile-time. +*/ +void _xt_tick_divisor_init(void) +{ +#ifdef XT_CLOCK_FREQ + + _xt_tick_divisor = (XT_CLOCK_FREQ / XT_TICK_PER_SEC); + +#else + + #ifdef XT_BOARD + _xt_tick_divisor = xtbsp_clock_freq_hz() / XT_TICK_PER_SEC; + #else + #error "No way to obtain processor clock frequency" + #endif /* XT_BOARD */ + +#endif /* XT_CLOCK_FREQ */ +} + +#endif /* XT_RTOS_TIMER_INT */ + diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_intr.c b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_intr.c new file mode 100644 index 000000000..864f4426e --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_intr.c @@ -0,0 +1,132 @@ +/******************************************************************************* +Copyright (c) 2006-2015 Cadence Design Systems Inc. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +******************************************************************************/ + +/****************************************************************************** + Xtensa-specific interrupt and exception functions for RTOS ports. + Also see xtensa_intr_asm.S. +******************************************************************************/ + +#include + +#include + +#include "xtensa_api.h" + + +#if XCHAL_HAVE_EXCEPTIONS + +/* Handler table is in xtensa_intr_asm.S */ + +extern xt_exc_handler _xt_exception_table[XCHAL_EXCCAUSE_NUM]; + + +/* + Default handler for unhandled exceptions. +*/ +void xt_unhandled_exception(XtExcFrame *frame) +{ + exit(-1); +} + + +/* + This function registers a handler for the specified exception. + The function returns the address of the previous handler. + On error, it returns 0. +*/ +xt_exc_handler xt_set_exception_handler(int n, xt_exc_handler f) +{ + xt_exc_handler old; + + if( n < 0 || n >= XCHAL_EXCCAUSE_NUM ) + return 0; /* invalid exception number */ + + old = _xt_exception_table[n]; + + if (f) { + _xt_exception_table[n] = f; + } + else { + _xt_exception_table[n] = &xt_unhandled_exception; + } + + return ((old == &xt_unhandled_exception) ? 0 : old); +} + +#endif + +#if XCHAL_HAVE_INTERRUPTS + +/* Handler table is in xtensa_intr_asm.S */ + +typedef struct xt_handler_table_entry { + void * handler; + void * arg; +} xt_handler_table_entry; + +extern xt_handler_table_entry _xt_interrupt_table[XCHAL_NUM_INTERRUPTS]; + + +/* + Default handler for unhandled interrupts. +*/ +void xt_unhandled_interrupt(void * arg) +{ + exit(-1); +} + + +/* + This function registers a handler for the specified interrupt. The "arg" + parameter specifies the argument to be passed to the handler when it is + invoked. The function returns the address of the previous handler. + On error, it returns 0. +*/ +xt_handler xt_set_interrupt_handler(int n, xt_handler f, void * arg) +{ + xt_handler_table_entry * entry; + xt_handler old; + + if( n < 0 || n >= XCHAL_NUM_INTERRUPTS ) + return 0; /* invalid interrupt number */ + if( Xthal_intlevel[n] > XCHAL_EXCM_LEVEL ) + return 0; /* priority level too high to safely handle in C */ + + entry = _xt_interrupt_table + n; + old = entry->handler; + + if (f) { + entry->handler = f; + entry->arg = arg; + } + else { + entry->handler = &xt_unhandled_interrupt; + entry->arg = (void*)n; + } + + return ((old == &xt_unhandled_interrupt) ? 0 : old); +} + + +#endif /* XCHAL_HAVE_INTERRUPTS */ + diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_intr_asm.S b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_intr_asm.S new file mode 100644 index 000000000..c8e97bb43 --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_intr_asm.S @@ -0,0 +1,179 @@ +/******************************************************************************* +Copyright (c) 2006-2015 Cadence Design Systems Inc. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +******************************************************************************/ + +/****************************************************************************** + Xtensa interrupt handling data and assembly routines. + Also see xtensa_intr.c and xtensa_vectors.S. +******************************************************************************/ + +#include +#include + +#include "xtensa_context.h" + +#if XCHAL_HAVE_INTERRUPTS + +/* +------------------------------------------------------------------------------- + INTENABLE virtualization information. +------------------------------------------------------------------------------- +*/ + + .data + .global _xt_intdata + .align 8 +_xt_intdata: + .global _xt_intenable + .type _xt_intenable,@object + .size _xt_intenable,4 + .global _xt_vpri_mask + .type _xt_vpri_mask,@object + .size _xt_vpri_mask,4 + +_xt_intenable: .word 0 /* Virtual INTENABLE */ +_xt_vpri_mask: .word 0xFFFFFFFF /* Virtual priority mask */ + + +/* +------------------------------------------------------------------------------- + Table of C-callable interrupt handlers for each interrupt. Note that not all + slots can be filled, because interrupts at level > EXCM_LEVEL will not be + dispatched to a C handler by default. +------------------------------------------------------------------------------- +*/ + + .data + .global _xt_interrupt_table + .align 8 + +_xt_interrupt_table: + + .set i, 0 + .rept XCHAL_NUM_INTERRUPTS + .word xt_unhandled_interrupt /* handler address */ + .word i /* handler arg (default: intnum) */ + .set i, i+1 + .endr + +#endif /* XCHAL_HAVE_INTERRUPTS */ + + +#if XCHAL_HAVE_EXCEPTIONS + +/* +------------------------------------------------------------------------------- + Table of C-callable exception handlers for each exception. Note that not all + slots will be active, because some exceptions (e.g. coprocessor exceptions) + are always handled by the OS and cannot be hooked by user handlers. +------------------------------------------------------------------------------- +*/ + + .data + .global _xt_exception_table + .align 4 + +_xt_exception_table: + .rept XCHAL_EXCCAUSE_NUM + .word xt_unhandled_exception /* handler address */ + .endr + +#endif + + +/* +------------------------------------------------------------------------------- + unsigned int xt_ints_on ( unsigned int mask ) + + Enables a set of interrupts. Does not simply set INTENABLE directly, but + computes it as a function of the current virtual priority. + Can be called from interrupt handlers. +------------------------------------------------------------------------------- +*/ + + .text + .align 4 + .global xt_ints_on + .type xt_ints_on,@function + +xt_ints_on: + + ENTRY0 +#if XCHAL_HAVE_INTERRUPTS + movi a3, 0 + movi a4, _xt_intdata + xsr a3, INTENABLE /* Disables all interrupts */ + rsync + l32i a3, a4, 0 /* a3 = _xt_intenable */ + l32i a6, a4, 4 /* a6 = _xt_vpri_mask */ + or a5, a3, a2 /* a5 = _xt_intenable | mask */ + s32i a5, a4, 0 /* _xt_intenable |= mask */ + and a5, a5, a6 /* a5 = _xt_intenable & _xt_vpri_mask */ + wsr a5, INTENABLE /* Reenable interrupts */ + mov a2, a3 /* Previous mask */ +#else + movi a2, 0 /* Return zero */ +#endif + RET0 + + .size xt_ints_on, . - xt_ints_on + + +/* +------------------------------------------------------------------------------- + unsigned int xt_ints_off ( unsigned int mask ) + + Disables a set of interrupts. Does not simply set INTENABLE directly, + but computes it as a function of the current virtual priority. + Can be called from interrupt handlers. +------------------------------------------------------------------------------- +*/ + + .text + .align 4 + .global xt_ints_off + .type xt_ints_off,@function + +xt_ints_off: + + ENTRY0 +#if XCHAL_HAVE_INTERRUPTS + movi a3, 0 + movi a4, _xt_intdata + xsr a3, INTENABLE /* Disables all interrupts */ + rsync + l32i a3, a4, 0 /* a3 = _xt_intenable */ + l32i a6, a4, 4 /* a6 = _xt_vpri_mask */ + or a5, a3, a2 /* a5 = _xt_intenable | mask */ + xor a5, a5, a2 /* a5 = _xt_intenable & ~mask */ + s32i a5, a4, 0 /* _xt_intenable &= ~mask */ + and a5, a5, a6 /* a5 = _xt_intenable & _xt_vpri_mask */ + wsr a5, INTENABLE /* Reenable interrupts */ + mov a2, a3 /* Previous mask */ +#else + movi a2, 0 /* return zero */ +#endif + RET0 + + .size xt_ints_off, . - xt_ints_off + + diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_overlay_os_hook.c b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_overlay_os_hook.c new file mode 100644 index 000000000..80e2428a6 --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_overlay_os_hook.c @@ -0,0 +1,67 @@ +// xtensa_overlay_os_hook.c -- Overlay manager OS hooks for FreeRTOS. + +// Copyright (c) 2015-2015 Cadence Design Systems Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining +// a copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to +// permit persons to whom the Software is furnished to do so, subject to +// the following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + + +#include "FreeRTOS.h" +#include "semphr.h" + +#if configUSE_MUTEX + +/* Mutex object that controls access to the overlay. Currently only one + * overlay region is supported so one mutex suffices. + */ +static SemaphoreHandle_t xt_overlay_mutex; + + +/* This function should be overridden to provide OS specific init such + * as the creation of a mutex lock that can be used for overlay locking. + * Typically this mutex would be set up with priority inheritance. See + * overlay manager documentation for more details. + */ +void xt_overlay_init_os(void) +{ + /* Create the mutex for overlay access. Priority inheritance is + * required. + */ + xt_overlay_mutex = xSemaphoreCreateMutex(); +} + + +/* This function locks access to shared overlay resources, typically + * by acquiring a mutex. + */ +void xt_overlay_lock(void) +{ + xSemaphoreTake(xt_overlay_mutex, 0); +} + + +/* This function releases access to shared overlay resources, typically + * by unlocking a mutex. + */ +void xt_overlay_unlock(void) +{ + xSemaphoreGive(xt_overlay_mutex); +} + +#endif diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_rtos.h b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_rtos.h new file mode 100644 index 000000000..2cb8b6b47 --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_rtos.h @@ -0,0 +1,233 @@ +/******************************************************************************* +// Copyright (c) 2003-2015 Cadence Design Systems, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining +// a copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to +// permit persons to whom the Software is furnished to do so, subject to +// the following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +-------------------------------------------------------------------------------- + + RTOS-SPECIFIC INFORMATION FOR XTENSA RTOS ASSEMBLER SOURCES + (FreeRTOS Port) + +This header is the primary glue between generic Xtensa RTOS support +sources and a specific RTOS port for Xtensa. It contains definitions +and macros for use primarily by Xtensa assembly coded source files. + +Macros in this header map callouts from generic Xtensa files to specific +RTOS functions. It may also be included in C source files. + +Xtensa RTOS ports support all RTOS-compatible configurations of the Xtensa +architecture, using the Xtensa hardware abstraction layer (HAL) to deal +with configuration specifics. + +Should be included by all Xtensa generic and RTOS port-specific sources. + +*******************************************************************************/ + +#ifndef XTENSA_RTOS_H +#define XTENSA_RTOS_H + +#ifdef __ASSEMBLER__ +#include +#else +#include +#endif + +#include +#include +#include + +/* +Include any RTOS specific definitions that are needed by this header. +*/ +#include + +/* +Convert FreeRTOSConfig definitions to XTENSA definitions. +However these can still be overridden from the command line. +*/ + +#ifndef XT_SIMULATOR + #if configXT_SIMULATOR + #define XT_SIMULATOR 1 /* Simulator mode */ + #endif +#endif + +#ifndef XT_BOARD + #if configXT_BOARD + #define XT_BOARD 1 /* Board mode */ + #endif +#endif + +#ifndef XT_TIMER_INDEX + #if defined configXT_TIMER_INDEX + #define XT_TIMER_INDEX configXT_TIMER_INDEX /* Index of hardware timer to be used */ + #endif +#endif + +#ifndef XT_INTEXC_HOOKS + #if configXT_INTEXC_HOOKS + #define XT_INTEXC_HOOKS 1 /* Enables exception hooks */ + #endif +#endif + +#if (!XT_SIMULATOR) && (!XT_BOARD) + #error Either XT_SIMULATOR or XT_BOARD must be defined. +#endif + + +/* +Name of RTOS (for messages). +*/ +#define XT_RTOS_NAME FreeRTOS + +/* +Check some Xtensa configuration requirements and report error if not met. +Error messages can be customize to the RTOS port. +*/ + +#if !XCHAL_HAVE_XEA2 +#error "FreeRTOS/Xtensa requires XEA2 (exception architecture 2)." +#endif + + +/******************************************************************************* + +RTOS CALLOUT MACROS MAPPED TO RTOS PORT-SPECIFIC FUNCTIONS. + +Define callout macros used in generic Xtensa code to interact with the RTOS. +The macros are simply the function names for use in calls from assembler code. +Some of these functions may call back to generic functions in xtensa_context.h . + +*******************************************************************************/ + +/* +Inform RTOS of entry into an interrupt handler that will affect it. +Allows RTOS to manage switch to any system stack and count nesting level. +Called after minimal context has been saved, with interrupts disabled. +RTOS port can call0 _xt_context_save to save the rest of the context. +May only be called from assembly code by the 'call0' instruction. +*/ +// void XT_RTOS_INT_ENTER(void) +#define XT_RTOS_INT_ENTER _frxt_int_enter + +/* +Inform RTOS of completion of an interrupt handler, and give control to +RTOS to perform thread/task scheduling, switch back from any system stack +and restore the context, and return to the exit dispatcher saved in the +stack frame at XT_STK_EXIT. RTOS port can call0 _xt_context_restore +to save the context saved in XT_RTOS_INT_ENTER via _xt_context_save, +leaving only a minimal part of the context to be restored by the exit +dispatcher. This function does not return to the place it was called from. +May only be called from assembly code by the 'call0' instruction. +*/ +// void XT_RTOS_INT_EXIT(void) +#define XT_RTOS_INT_EXIT _frxt_int_exit + +/* +Inform RTOS of the occurrence of a tick timer interrupt. +If RTOS has no tick timer, leave XT_RTOS_TIMER_INT undefined. +May be coded in or called from C or assembly, per ABI conventions. +RTOS may optionally define XT_TICK_PER_SEC in its own way (eg. macro). +*/ +// void XT_RTOS_TIMER_INT(void) +#define XT_RTOS_TIMER_INT _frxt_timer_int +#define XT_TICK_PER_SEC configTICK_RATE_HZ + +/* +Return in a15 the base address of the co-processor state save area for the +thread that triggered a co-processor exception, or 0 if no thread was running. +The state save area is structured as defined in xtensa_context.h and has size +XT_CP_SIZE. Co-processor instructions should only be used in thread code, never +in interrupt handlers or the RTOS kernel. May only be called from assembly code +and by the 'call0' instruction. A result of 0 indicates an unrecoverable error. +The implementation may use only a2-4, a15 (all other regs must be preserved). +*/ +// void* XT_RTOS_CP_STATE(void) +#define XT_RTOS_CP_STATE _frxt_task_coproc_state + + +/******************************************************************************* + +HOOKS TO DYNAMICALLY INSTALL INTERRUPT AND EXCEPTION HANDLERS PER LEVEL. + +This Xtensa RTOS port provides hooks for dynamically installing exception +and interrupt handlers to facilitate automated testing where each test +case can install its own handler for user exceptions and each interrupt +priority (level). This consists of an array of function pointers indexed +by interrupt priority, with index 0 being the user exception handler hook. +Each entry in the array is initially 0, and may be replaced by a function +pointer of type XT_INTEXC_HOOK. A handler may be uninstalled by installing 0. + +The handler for low and medium priority obeys ABI conventions so may be coded +in C. For the exception handler, the cause is the contents of the EXCCAUSE +reg, and the result is -1 if handled, else the cause (still needs handling). +For interrupt handlers, the cause is a mask of pending enabled interrupts at +that level, and the result is the same mask with the bits for the handled +interrupts cleared (those not cleared still need handling). This allows a test +case to either pre-handle or override the default handling for the exception +or interrupt level (see xtensa_vectors.S). + +High priority handlers (including NMI) must be coded in assembly, are always +called by 'call0' regardless of ABI, must preserve all registers except a0, +and must not use or modify the interrupted stack. The hook argument 'cause' +is not passed and the result is ignored, so as not to burden the caller with +saving and restoring a2 (it assumes only one interrupt per level - see the +discussion in high priority interrupts in xtensa_vectors.S). The handler +therefore should be coded to prototype 'void h(void)' even though it plugs +into an array of handlers of prototype 'unsigned h(unsigned)'. + +To enable interrupt/exception hooks, compile the RTOS with '-DXT_INTEXC_HOOKS'. + +*******************************************************************************/ + +#define XT_INTEXC_HOOK_NUM (1 + XCHAL_NUM_INTLEVELS + XCHAL_HAVE_NMI) + +#ifndef __ASSEMBLER__ +typedef unsigned (*XT_INTEXC_HOOK)(unsigned cause); +extern volatile XT_INTEXC_HOOK _xt_intexc_hooks[XT_INTEXC_HOOK_NUM]; +#endif + + +/******************************************************************************* + +CONVENIENCE INCLUSIONS. + +Ensures RTOS specific files need only include this one Xtensa-generic header. +These headers are included last so they can use the RTOS definitions above. + +*******************************************************************************/ + +#include "xtensa_context.h" + +#ifdef XT_RTOS_TIMER_INT +#include "xtensa_timer.h" +#endif + + +/******************************************************************************* + +Xtensa Port Version. + +*******************************************************************************/ + +#define XTENSA_PORT_VERSION 1.6 +#define XTENSA_PORT_VERSION_STRING "1.6" + +#endif /* XTENSA_RTOS_H */ + diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_timer.h b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_timer.h new file mode 100644 index 000000000..17e6a6b94 --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_timer.h @@ -0,0 +1,159 @@ +/******************************************************************************* +// Copyright (c) 2003-2015 Cadence Design Systems, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining +// a copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to +// permit persons to whom the Software is furnished to do so, subject to +// the following conditions: +// +// The above copyright notice and this permission notice shall be included +// in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +-------------------------------------------------------------------------------- + + XTENSA INFORMATION FOR RTOS TICK TIMER AND CLOCK FREQUENCY + +This header contains definitions and macros for use primarily by Xtensa +RTOS assembly coded source files. It includes and uses the Xtensa hardware +abstraction layer (HAL) to deal with config specifics. It may also be +included in C source files. + +User may edit to modify timer selection and to specify clock frequency and +tick duration to match timer interrupt to the real-time tick duration. + +If the RTOS has no timer interrupt, then there is no tick timer and the +clock frequency is irrelevant, so all of these macros are left undefined +and the Xtensa core configuration need not have a timer. + +*******************************************************************************/ + +#ifndef XTENSA_TIMER_H +#define XTENSA_TIMER_H + +#ifdef __ASSEMBLER__ +#include +#endif + +#include +#include + +#include "xtensa_rtos.h" /* in case this wasn't included directly */ + +#include + +/* +Select timer to use for periodic tick, and determine its interrupt number +and priority. User may specify a timer by defining XT_TIMER_INDEX with -D, +in which case its validity is checked (it must exist in this core and must +not be on a high priority interrupt - an error will be reported in invalid). +Otherwise select the first low or medium priority interrupt timer available. +*/ +#if XCHAL_NUM_TIMERS == 0 + + #error "This Xtensa configuration is unsupported, it has no timers." + +#else + +#ifndef XT_TIMER_INDEX + #if XCHAL_TIMER3_INTERRUPT != XTHAL_TIMER_UNCONFIGURED + #if XCHAL_INT_LEVEL(XCHAL_TIMER3_INTERRUPT) <= XCHAL_EXCM_LEVEL + #undef XT_TIMER_INDEX + #define XT_TIMER_INDEX 3 + #endif + #endif + #if XCHAL_TIMER2_INTERRUPT != XTHAL_TIMER_UNCONFIGURED + #if XCHAL_INT_LEVEL(XCHAL_TIMER2_INTERRUPT) <= XCHAL_EXCM_LEVEL + #undef XT_TIMER_INDEX + #define XT_TIMER_INDEX 2 + #endif + #endif + #if XCHAL_TIMER1_INTERRUPT != XTHAL_TIMER_UNCONFIGURED + #if XCHAL_INT_LEVEL(XCHAL_TIMER1_INTERRUPT) <= XCHAL_EXCM_LEVEL + #undef XT_TIMER_INDEX + #define XT_TIMER_INDEX 1 + #endif + #endif + #if XCHAL_TIMER0_INTERRUPT != XTHAL_TIMER_UNCONFIGURED + #if XCHAL_INT_LEVEL(XCHAL_TIMER0_INTERRUPT) <= XCHAL_EXCM_LEVEL + #undef XT_TIMER_INDEX + #define XT_TIMER_INDEX 0 + #endif + #endif +#endif +#ifndef XT_TIMER_INDEX + #error "There is no suitable timer in this Xtensa configuration." +#endif + +#define XT_CCOMPARE (CCOMPARE + XT_TIMER_INDEX) +#define XT_TIMER_INTNUM XCHAL_TIMER_INTERRUPT(XT_TIMER_INDEX) +#define XT_TIMER_INTPRI XCHAL_INT_LEVEL(XT_TIMER_INTNUM) +#define XT_TIMER_INTEN (1 << XT_TIMER_INTNUM) + +#if XT_TIMER_INTNUM == XTHAL_TIMER_UNCONFIGURED + #error "The timer selected by XT_TIMER_INDEX does not exist in this core." +#elif XT_TIMER_INTPRI > XCHAL_EXCM_LEVEL + #error "The timer interrupt cannot be high priority (use medium or low)." +#endif + +#endif /* XCHAL_NUM_TIMERS */ + +/* +Set processor clock frequency, used to determine clock divisor for timer tick. +User should BE SURE TO ADJUST THIS for the Xtensa platform being used. +If using a supported board via the board-independent API defined in xtbsp.h, +this may be left undefined and frequency and tick divisor will be computed +and cached during run-time initialization. + +NOTE ON SIMULATOR: +Under the Xtensa instruction set simulator, the frequency can only be estimated +because it depends on the speed of the host and the version of the simulator. +Also because it runs much slower than hardware, it is not possible to achieve +real-time performance for most applications under the simulator. A frequency +too low does not allow enough time between timer interrupts, starving threads. +To obtain a more convenient but non-real-time tick duration on the simulator, +compile with xt-xcc option "-DXT_SIMULATOR". +Adjust this frequency to taste (it's not real-time anyway!). +*/ +#if defined(XT_SIMULATOR) && !defined(XT_CLOCK_FREQ) +#define XT_CLOCK_FREQ configCPU_CLOCK_HZ +#endif + +#if !defined(XT_CLOCK_FREQ) && !defined(XT_BOARD) + #error "XT_CLOCK_FREQ must be defined for the target platform." +#endif + +/* +Default number of timer "ticks" per second (default 100 for 10ms tick). +RTOS may define this in its own way (if applicable) in xtensa_rtos.h. +User may redefine this to an optimal value for the application, either by +editing this here or in xtensa_rtos.h, or compiling with xt-xcc option +"-DXT_TICK_PER_SEC=" where is a suitable number. +*/ +#ifndef XT_TICK_PER_SEC +#define XT_TICK_PER_SEC configTICK_RATE_HZ /* 10 ms tick = 100 ticks per second */ +#endif + +/* +Derivation of clock divisor for timer tick and interrupt (one per tick). +*/ +#ifdef XT_CLOCK_FREQ +#define XT_TICK_DIVISOR (XT_CLOCK_FREQ / XT_TICK_PER_SEC) +#endif + +#ifndef __ASSEMBLER__ +extern unsigned _xt_tick_divisor; +extern void _xt_tick_divisor_init(void); +#endif + +#endif /* XTENSA_TIMER_H */ + diff --git a/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_vectors.S b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_vectors.S new file mode 100644 index 000000000..5d8c9f234 --- /dev/null +++ b/FreeRTOS/Source/portable/ThirdParty/XCC/Xtensa/xtensa_vectors.S @@ -0,0 +1,1903 @@ +/******************************************************************************* +Copyright (c) 2006-2015 Cadence Design Systems Inc. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +-------------------------------------------------------------------------------- + + XTENSA VECTORS AND LOW LEVEL HANDLERS FOR AN RTOS + + Xtensa low level exception and interrupt vectors and handlers for an RTOS. + + Interrupt handlers and user exception handlers support interaction with + the RTOS by calling XT_RTOS_INT_ENTER and XT_RTOS_INT_EXIT before and + after user's specific interrupt handlers. These macros are defined in + xtensa_.h to call suitable functions in a specific RTOS. + + Users can install application-specific interrupt handlers for low and + medium level interrupts, by calling xt_set_interrupt_handler(). These + handlers can be written in C, and must obey C calling convention. The + handler table is indexed by the interrupt number. Each handler may be + provided with an argument. + + Note that the system timer interrupt is handled specially, and is + dispatched to the RTOS-specific handler. This timer cannot be hooked + by application code. + + Optional hooks are also provided to install a handler per level at + run-time, made available by compiling this source file with + '-DXT_INTEXC_HOOKS' (useful for automated testing). + +!! This file is a template that usually needs to be modified to handle !! +!! application specific interrupts. Search USER_EDIT for helpful comments !! +!! on where to insert handlers and how to write them. !! + + Users can also install application-specific exception handlers in the + same way, by calling xt_set_exception_handler(). One handler slot is + provided for each exception type. Note that some exceptions are handled + by the porting layer itself, and cannot be taken over by application + code in this manner. These are the alloca, syscall, and coprocessor + exceptions. + + The exception handlers can be written in C, and must follow C calling + convention. Each handler is passed a pointer to an exception frame as + its single argument. The exception frame is created on the stack, and + holds the saved context of the thread that took the exception. If the + handler returns, the context will be restored and the instruction that + caused the exception will be retried. If the handler makes any changes + to the saved state in the exception frame, the changes will be applied + when restoring the context. + + Because Xtensa is a configurable architecture, this port supports all user + generated configurations (except restrictions stated in the release notes). + This is accomplished by conditional compilation using macros and functions + defined in the Xtensa HAL (hardware adaptation layer) for your configuration. + Only the relevant parts of this file will be included in your RTOS build. + For example, this file provides interrupt vector templates for all types and + all priority levels, but only the ones in your configuration are built. + + NOTES on the use of 'call0' for long jumps instead of 'j': + 1. This file should be assembled with the -mlongcalls option to xt-xcc. + 2. The -mlongcalls compiler option causes 'call0 dest' to be expanded to + a sequence 'l32r a0, dest' 'callx0 a0' which works regardless of the + distance from the call to the destination. The linker then relaxes + it back to 'call0 dest' if it determines that dest is within range. + This allows more flexibility in locating code without the performance + overhead of the 'l32r' literal data load in cases where the destination + is in range of 'call0'. There is an additional benefit in that 'call0' + has a longer range than 'j' due to the target being word-aligned, so + the 'l32r' sequence is less likely needed. + 3. The use of 'call0' with -mlongcalls requires that register a0 not be + live at the time of the call, which is always the case for a function + call but needs to be ensured if 'call0' is used as a jump in lieu of 'j'. + 4. This use of 'call0' is independent of the C function call ABI. + +*******************************************************************************/ + +#include "xtensa_rtos.h" + + +/* Enable stack backtrace across exception/interrupt - see below */ +#define XT_DEBUG_BACKTRACE 1 + + +/* +-------------------------------------------------------------------------------- + Defines used to access _xtos_interrupt_table. +-------------------------------------------------------------------------------- +*/ +#define XIE_HANDLER 0 +#define XIE_ARG 4 +#define XIE_SIZE 8 + +/* +-------------------------------------------------------------------------------- + Macro extract_msb - return the input with only the highest bit set. + + Input : "ain" - Input value, clobbered. + Output : "aout" - Output value, has only one bit set, MSB of "ain". + The two arguments must be different AR registers. +-------------------------------------------------------------------------------- +*/ + + .macro extract_msb aout ain +1: + addi \aout, \ain, -1 /* aout = ain - 1 */ + and \ain, \ain, \aout /* ain = ain & aout */ + bnez \ain, 1b /* repeat until ain == 0 */ + addi \aout, \aout, 1 /* return aout + 1 */ + .endm + +/* +-------------------------------------------------------------------------------- + Macro dispatch_c_isr - dispatch interrupts to user ISRs. + This will dispatch to user handlers (if any) that are registered in the + XTOS dispatch table (_xtos_interrupt_table). These handlers would have + been registered by calling _xtos_set_interrupt_handler(). There is one + exception - the timer interrupt used by the OS will not be dispatched + to a user handler - this must be handled by the caller of this macro. + + Level triggered and software interrupts are automatically deasserted by + this code. + + ASSUMPTIONS: + -- PS.INTLEVEL is set to "level" at entry + -- PS.EXCM = 0, C calling enabled + + NOTE: For CALL0 ABI, a12-a15 have not yet been saved. + + NOTE: This macro will use registers a0 and a2-a6. The arguments are: + level -- interrupt level + mask -- interrupt bitmask for this level +-------------------------------------------------------------------------------- +*/ + + .macro dispatch_c_isr level mask + + /* Get mask of pending, enabled interrupts at this level into a2. */ + +.L_xt_user_int_&level&: + rsr a2, INTENABLE + rsr a3, INTERRUPT + movi a4, \mask + and a2, a2, a3 + and a2, a2, a4 + beqz a2, 9f /* nothing to do */ + + /* This bit of code provides a nice debug backtrace in the debugger. + It does take a few more instructions, so undef XT_DEBUG_BACKTRACE + if you want to save the cycles. + */ + #if XT_DEBUG_BACKTRACE + #ifndef __XTENSA_CALL0_ABI__ + rsr a0, EPC_1 + \level - 1 /* return address */ + movi a4, 0xC0000000 /* constant with top 2 bits set (call size) */ + or a0, a0, a4 /* set top 2 bits */ + addx2 a0, a4, a0 /* clear top bit -- simulating call4 size */ + #endif + #endif + + #ifdef XT_INTEXC_HOOKS + /* Call interrupt hook if present to (pre)handle interrupts. */ + movi a4, _xt_intexc_hooks + l32i a4, a4, \level << 2 + beqz a4, 2f + #ifdef __XTENSA_CALL0_ABI__ + callx0 a4 + beqz a2, 9f + #else + mov a6, a2 + callx4 a4 + beqz a6, 9f + mov a2, a6 + #endif +2: + #endif + + /* Now look up in the dispatch table and call user ISR if any. */ + /* If multiple bits are set then MSB has highest priority. */ + + extract_msb a4, a2 /* a4 = MSB of a2, a2 trashed */ + + #ifdef XT_USE_SWPRI + /* Enable all interrupts at this level that are numerically higher + than the one we just selected, since they are treated as higher + priority. + */ + movi a3, \mask /* a3 = all interrupts at this level */ + add a2, a4, a4 /* a2 = a4 << 1 */ + addi a2, a2, -1 /* a2 = mask of 1's <= a4 bit */ + and a2, a2, a3 /* a2 = mask of all bits <= a4 at this level */ + movi a3, _xt_intdata + l32i a6, a3, 4 /* a6 = _xt_vpri_mask */ + neg a2, a2 + addi a2, a2, -1 /* a2 = mask to apply */ + and a5, a6, a2 /* mask off all bits <= a4 bit */ + s32i a5, a3, 4 /* update _xt_vpri_mask */ + rsr a3, INTENABLE + and a3, a3, a2 /* mask off all bits <= a4 bit */ + wsr a3, INTENABLE + rsil a3, \level - 1 /* lower interrupt level by 1 */ + #endif + + movi a3, XT_TIMER_INTEN /* a3 = timer interrupt bit */ + wsr a4, INTCLEAR /* clear sw or edge-triggered interrupt */ + beq a3, a4, 7f /* if timer interrupt then skip table */ + + find_ms_setbit a3, a4, a3, 0 /* a3 = interrupt number */ + + movi a4, _xt_interrupt_table + addx8 a3, a3, a4 /* a3 = address of interrupt table entry */ + l32i a4, a3, XIE_HANDLER /* a4 = handler address */ + #ifdef __XTENSA_CALL0_ABI__ + mov a12, a6 /* save in callee-saved reg */ + l32i a2, a3, XIE_ARG /* a2 = handler arg */ + callx0 a4 /* call handler */ + mov a2, a12 + #else + mov a2, a6 /* save in windowed reg */ + l32i a6, a3, XIE_ARG /* a6 = handler arg */ + callx4 a4 /* call handler */ + #endif + + #ifdef XT_USE_SWPRI + j 8f + #else + j .L_xt_user_int_&level& /* check for more interrupts */ + #endif + +7: + + .ifeq XT_TIMER_INTPRI - \level +.L_xt_user_int_timer_&level&: + /* + Interrupt handler for the RTOS tick timer if at this level. + We'll be reading the interrupt state again after this call + so no need to preserve any registers except a6 (vpri_mask). + */ + + #ifdef __XTENSA_CALL0_ABI__ + mov a12, a6 + call0 XT_RTOS_TIMER_INT + mov a2, a12 + #else + mov a2, a6 + call4 XT_RTOS_TIMER_INT + #endif + .endif + + #ifdef XT_USE_SWPRI + j 8f + #else + j .L_xt_user_int_&level& /* check for more interrupts */ + #endif + + #ifdef XT_USE_SWPRI +8: + /* Restore old value of _xt_vpri_mask from a2. Also update INTENABLE from + virtual _xt_intenable which _could_ have changed during interrupt + processing. */ + + movi a3, _xt_intdata + l32i a4, a3, 0 /* a4 = _xt_intenable */ + s32i a2, a3, 4 /* update _xt_vpri_mask */ + and a4, a4, a2 /* a4 = masked intenable */ + wsr a4, INTENABLE /* update INTENABLE */ + #endif + +9: + /* done */ + + .endm + + +/* +-------------------------------------------------------------------------------- + Panic handler. + Should be reached by call0 (preferable) or jump only. If call0, a0 says where + from. If on simulator, display panic message and abort, else loop indefinitely. +-------------------------------------------------------------------------------- +*/ + + .text + .global _xt_panic + .type _xt_panic,@function + .align 4 + +_xt_panic: + #ifdef XT_SIMULATOR + addi a4, a0, -3 /* point to call0 */ + movi a3, _xt_panic_message + movi a2, SYS_log_msg + simcall + movi a2, SYS_gdb_abort + simcall + #else + rsil a2, XCHAL_EXCM_LEVEL /* disable all low & med ints */ +1: j 1b /* loop infinitely */ + #endif + + .section .rodata, "a" + .align 4 + +_xt_panic_message: + .string "\n*** _xt_panic() was called from 0x%08x or jumped to. ***\n" + + +/* +-------------------------------------------------------------------------------- + Hooks to dynamically install handlers for exceptions and interrupts. + Allows automated regression frameworks to install handlers per test. + Consists of an array of function pointers indexed by interrupt level, + with index 0 containing the entry for user exceptions. + Initialized with all 0s, meaning no handler is installed at each level. + See comment in xtensa_rtos.h for more details. +-------------------------------------------------------------------------------- +*/ + + #ifdef XT_INTEXC_HOOKS + .data + .global _xt_intexc_hooks + .type _xt_intexc_hooks,@object + .align 4 + +_xt_intexc_hooks: + .fill XT_INTEXC_HOOK_NUM, 4, 0 + #endif + + +/* +-------------------------------------------------------------------------------- + EXCEPTION AND LEVEL 1 INTERRUPT VECTORS AND LOW LEVEL HANDLERS + (except window exception vectors). + + Each vector goes at a predetermined location according to the Xtensa + hardware configuration, which is ensured by its placement in a special + section known to the Xtensa linker support package (LSP). It performs + the minimum necessary before jumping to the handler in the .text section. + + The corresponding handler goes in the normal .text section. It sets up + the appropriate stack frame, saves a few vector-specific registers and + calls XT_RTOS_INT_ENTER to save the rest of the interrupted context + and enter the RTOS, then sets up a C environment. It then calls the + user's interrupt handler code (which may be coded in C) and finally + calls XT_RTOS_INT_EXIT to transfer control to the RTOS for scheduling. + + While XT_RTOS_INT_EXIT does not return directly to the interruptee, + eventually the RTOS scheduler will want to dispatch the interrupted + task or handler. The scheduler will return to the exit point that was + saved in the interrupt stack frame at XT_STK_EXIT. +-------------------------------------------------------------------------------- +*/ + + +/* +-------------------------------------------------------------------------------- +Debug Exception. +-------------------------------------------------------------------------------- +*/ + +#if XCHAL_HAVE_DEBUG + + .begin literal_prefix .DebugExceptionVector + .section .DebugExceptionVector.text, "ax" + .global _DebugExceptionVector + .align 4 + +_DebugExceptionVector: + + #ifdef XT_SIMULATOR + /* + In the simulator, let the debugger (if any) handle the debug exception, + or simply stop the simulation: + */ + wsr a2, EXCSAVE+XCHAL_DEBUGLEVEL /* save a2 where sim expects it */ + movi a2, SYS_gdb_enter_sktloop + simcall /* have ISS handle debug exc. */ + #elif 0 /* change condition to 1 to use the HAL minimal debug handler */ + wsr a3, EXCSAVE+XCHAL_DEBUGLEVEL + movi a3, xthal_debugexc_defhndlr_nw /* use default debug handler */ + jx a3 + #else + wsr a0, EXCSAVE+XCHAL_DEBUGLEVEL /* save original a0 somewhere */ + call0 _xt_panic /* does not return */ + rfi XCHAL_DEBUGLEVEL /* make a0 point here not later */ + #endif + + .end literal_prefix + +#endif + +/* +-------------------------------------------------------------------------------- +Double Exception. +Double exceptions are not a normal occurrence. They indicate a bug of some kind. +-------------------------------------------------------------------------------- +*/ + +#ifdef XCHAL_DOUBLEEXC_VECTOR_VADDR + + .begin literal_prefix .DoubleExceptionVector + .section .DoubleExceptionVector.text, "ax" + .global _DoubleExceptionVector + .align 4 + +_DoubleExceptionVector: + + #if XCHAL_HAVE_DEBUG + break 1, 4 /* unhandled double exception */ + #endif + call0 _xt_panic /* does not return */ + rfde /* make a0 point here not later */ + + .end literal_prefix + +#endif /* XCHAL_DOUBLEEXC_VECTOR_VADDR */ + +/* +-------------------------------------------------------------------------------- +Kernel Exception (including Level 1 Interrupt from kernel mode). +-------------------------------------------------------------------------------- +*/ + + .begin literal_prefix .KernelExceptionVector + .section .KernelExceptionVector.text, "ax" + .global _KernelExceptionVector + .align 4 + +_KernelExceptionVector: + + wsr a0, EXCSAVE_1 /* preserve a0 */ + call0 _xt_kernel_exc /* kernel exception handler */ + /* never returns here - call0 is used as a jump (see note at top) */ + + .end literal_prefix + + .text + .align 4 + +_xt_kernel_exc: + #if XCHAL_HAVE_DEBUG + break 1, 0 /* unhandled kernel exception */ + #endif + call0 _xt_panic /* does not return */ + rfe /* make a0 point here not there */ + + +/* +-------------------------------------------------------------------------------- +User Exception (including Level 1 Interrupt from user mode). +-------------------------------------------------------------------------------- +*/ + + .begin literal_prefix .UserExceptionVector + .section .UserExceptionVector.text, "ax" + .global _UserExceptionVector + .type _UserExceptionVector,@function + .align 4 + +_UserExceptionVector: + + wsr a0, EXCSAVE_1 /* preserve a0 */ + call0 _xt_user_exc /* user exception handler */ + /* never returns here - call0 is used as a jump (see note at top) */ + + .end literal_prefix + +/* +-------------------------------------------------------------------------------- + Insert some waypoints for jumping beyond the signed 8-bit range of + conditional branch instructions, so the conditional branchces to specific + exception handlers are not taken in the mainline. Saves some cycles in the + mainline. +-------------------------------------------------------------------------------- +*/ + + .text + + #if XCHAL_HAVE_WINDOWED + .align 4 +_xt_to_alloca_exc: + call0 _xt_alloca_exc /* in window vectors section */ + /* never returns here - call0 is used as a jump (see note at top) */ + #endif + + .align 4 +_xt_to_syscall_exc: + call0 _xt_syscall_exc + /* never returns here - call0 is used as a jump (see note at top) */ + + #if XCHAL_CP_NUM > 0 + .align 4 +_xt_to_coproc_exc: + call0 _xt_coproc_exc + /* never returns here - call0 is used as a jump (see note at top) */ + #endif + + +/* +-------------------------------------------------------------------------------- + User exception handler. +-------------------------------------------------------------------------------- +*/ + + .type _xt_user_exc,@function + .align 4 + +_xt_user_exc: + + /* If level 1 interrupt then jump to the dispatcher */ + rsr a0, EXCCAUSE + beqi a0, EXCCAUSE_LEVEL1INTERRUPT, _xt_lowint1 + + /* Handle any coprocessor exceptions. Rely on the fact that exception + numbers above EXCCAUSE_CP0_DISABLED all relate to the coprocessors. + */ + #if XCHAL_CP_NUM > 0 + bgeui a0, EXCCAUSE_CP0_DISABLED, _xt_to_coproc_exc + #endif + + /* Handle alloca and syscall exceptions */ + #if XCHAL_HAVE_WINDOWED + beqi a0, EXCCAUSE_ALLOCA, _xt_to_alloca_exc + #endif + beqi a0, EXCCAUSE_SYSCALL, _xt_to_syscall_exc + + /* Handle all other exceptions. All can have user-defined handlers. */ + /* NOTE: we'll stay on the user stack for exception handling. */ + + /* Allocate exception frame and save minimal context. */ + mov a0, sp + addi sp, sp, -XT_STK_FRMSZ + s32i a0, sp, XT_STK_A1 + #if XCHAL_HAVE_WINDOWED + s32e a0, sp, -12 /* for debug backtrace */ + #endif + rsr a0, PS /* save interruptee's PS */ + s32i a0, sp, XT_STK_PS + rsr a0, EPC_1 /* save interruptee's PC */ + s32i a0, sp, XT_STK_PC + rsr a0, EXCSAVE_1 /* save interruptee's a0 */ + s32i a0, sp, XT_STK_A0 + #if XCHAL_HAVE_WINDOWED + s32e a0, sp, -16 /* for debug backtrace */ + #endif + s32i a12, sp, XT_STK_A12 /* _xt_context_save requires A12- */ + s32i a13, sp, XT_STK_A13 /* A13 to have already been saved */ + call0 _xt_context_save + + /* Save exc cause and vaddr into exception frame */ + rsr a0, EXCCAUSE + s32i a0, sp, XT_STK_EXCCAUSE + rsr a0, EXCVADDR + s32i a0, sp, XT_STK_EXCVADDR + + /* Set up PS for C, reenable hi-pri interrupts, and clear EXCM. */ + #ifdef __XTENSA_CALL0_ABI__ + movi a0, PS_INTLEVEL(XCHAL_EXCM_LEVEL) | PS_UM + #else + movi a0, PS_INTLEVEL(XCHAL_EXCM_LEVEL) | PS_UM | PS_WOE + #endif + wsr a0, PS + + #ifdef XT_DEBUG_BACKTRACE + #ifndef __XTENSA_CALL0_ABI__ + rsr a0, EPC_1 /* return address for debug backtrace */ + movi a5, 0xC0000000 /* constant with top 2 bits set (call size) */ + rsync /* wait for WSR.PS to complete */ + or a0, a0, a5 /* set top 2 bits */ + addx2 a0, a5, a0 /* clear top bit -- thus simulating call4 size */ + #else + rsync /* wait for WSR.PS to complete */ + #endif + #endif + + rsr a2, EXCCAUSE /* recover exc cause */ + + #ifdef XT_INTEXC_HOOKS + /* + Call exception hook to pre-handle exceptions (if installed). + Pass EXCCAUSE in a2, and check result in a2 (if -1, skip default handling). + */ + movi a4, _xt_intexc_hooks + l32i a4, a4, 0 /* user exception hook index 0 */ + beqz a4, 1f +.Ln_xt_user_exc_call_hook: + #ifdef __XTENSA_CALL0_ABI__ + callx0 a4 + beqi a2, -1, .L_xt_user_done + #else + mov a6, a2 + callx4 a4 + beqi a6, -1, .L_xt_user_done + mov a2, a6 + #endif +1: + #endif + + rsr a2, EXCCAUSE /* recover exc cause */ + movi a3, _xt_exception_table + addx4 a4, a2, a3 /* a4 = address of exception table entry */ + l32i a4, a4, 0 /* a4 = handler address */ + #ifdef __XTENSA_CALL0_ABI__ + mov a2, sp /* a2 = pointer to exc frame */ + callx0 a4 /* call handler */ + #else + mov a6, sp /* a6 = pointer to exc frame */ + callx4 a4 /* call handler */ + #endif + +.L_xt_user_done: + + /* Restore context and return */ + call0 _xt_context_restore + l32i a0, sp, XT_STK_PS /* retrieve interruptee's PS */ + wsr a0, PS + l32i a0, sp, XT_STK_PC /* retrieve interruptee's PC */ + wsr a0, EPC_1 + l32i a0, sp, XT_STK_A0 /* retrieve interruptee's A0 */ + l32i sp, sp, XT_STK_A1 /* remove exception frame */ + rsync /* ensure PS and EPC written */ + rfe /* PS.EXCM is cleared */ + + +/* +-------------------------------------------------------------------------------- + Exit point for dispatch. Saved in interrupt stack frame at XT_STK_EXIT + on entry and used to return to a thread or interrupted interrupt handler. +-------------------------------------------------------------------------------- +*/ + + .global _xt_user_exit + .type _xt_user_exit,@function + .align 4 +_xt_user_exit: + l32i a0, sp, XT_STK_PS /* retrieve interruptee's PS */ + wsr a0, PS + l32i a0, sp, XT_STK_PC /* retrieve interruptee's PC */ + wsr a0, EPC_1 + l32i a0, sp, XT_STK_A0 /* retrieve interruptee's A0 */ + l32i sp, sp, XT_STK_A1 /* remove interrupt stack frame */ + rsync /* ensure PS and EPC written */ + rfe /* PS.EXCM is cleared */ + + +/* +-------------------------------------------------------------------------------- +Syscall Exception Handler (jumped to from User Exception Handler). +Syscall 0 is required to spill the register windows (no-op in Call 0 ABI). +Only syscall 0 is handled here. Other syscalls return -1 to caller in a2. +-------------------------------------------------------------------------------- +*/ + + .text + .type _xt_syscall_exc,@function + .align 4 +_xt_syscall_exc: + + #ifdef __XTENSA_CALL0_ABI__ + /* + Save minimal regs for scratch. Syscall 0 does nothing in Call0 ABI. + Use a minimal stack frame (16B) to save A2 & A3 for scratch. + PS.EXCM could be cleared here, but unlikely to improve worst-case latency. + rsr a0, PS + addi a0, a0, -PS_EXCM_MASK + wsr a0, PS + */ + addi sp, sp, -16 + s32i a2, sp, 8 + s32i a3, sp, 12 + #else /* Windowed ABI */ + /* + Save necessary context and spill the register windows. + PS.EXCM is still set and must remain set until after the spill. + Reuse context save function though it saves more than necessary. + For this reason, a full interrupt stack frame is allocated. + */ + addi sp, sp, -XT_STK_FRMSZ /* allocate interrupt stack frame */ + s32i a12, sp, XT_STK_A12 /* _xt_context_save requires A12- */ + s32i a13, sp, XT_STK_A13 /* A13 to have already been saved */ + call0 _xt_context_save + #endif + + /* + Grab the interruptee's PC and skip over the 'syscall' instruction. + If it's at the end of a zero-overhead loop and it's not on the last + iteration, decrement loop counter and skip to beginning of loop. + */ + rsr a2, EPC_1 /* a2 = PC of 'syscall' */ + addi a3, a2, 3 /* ++PC */ + #if XCHAL_HAVE_LOOPS + rsr a0, LEND /* if (PC == LEND */ + bne a3, a0, 1f + rsr a0, LCOUNT /* && LCOUNT != 0) */ + beqz a0, 1f /* { */ + addi a0, a0, -1 /* --LCOUNT */ + rsr a3, LBEG /* PC = LBEG */ + wsr a0, LCOUNT /* } */ + #endif +1: wsr a3, EPC_1 /* update PC */ + + /* Restore interruptee's context and return from exception. */ + #ifdef __XTENSA_CALL0_ABI__ + l32i a2, sp, 8 + l32i a3, sp, 12 + addi sp, sp, 16 + #else + call0 _xt_context_restore + addi sp, sp, XT_STK_FRMSZ + #endif + movi a0, -1 + movnez a2, a0, a2 /* return -1 if not syscall 0 */ + rsr a0, EXCSAVE_1 + rfe + +/* +-------------------------------------------------------------------------------- +Co-Processor Exception Handler (jumped to from User Exception Handler). +These exceptions are generated by co-processor instructions, which are only +allowed in thread code (not in interrupts or kernel code). This restriction is +deliberately imposed to reduce the burden of state-save/restore in interrupts. +-------------------------------------------------------------------------------- +*/ +#if XCHAL_CP_NUM > 0 + + .section .rodata, "a" + +/* Offset to CP n save area in thread's CP save area. */ + .global _xt_coproc_sa_offset + .type _xt_coproc_sa_offset,@object + .align 16 /* minimize crossing cache boundaries */ +_xt_coproc_sa_offset: + .word XT_CP0_SA, XT_CP1_SA, XT_CP2_SA, XT_CP3_SA + .word XT_CP4_SA, XT_CP5_SA, XT_CP6_SA, XT_CP7_SA + +/* Bitmask for CP n's CPENABLE bit. */ + .type _xt_coproc_mask,@object + .align 16,,8 /* try to keep it all in one cache line */ + .set i, 0 +_xt_coproc_mask: + .rept XCHAL_CP_MAX + .long (i<<16) | (1<= 2 + + .begin literal_prefix .Level2InterruptVector + .section .Level2InterruptVector.text, "ax" + .global _Level2Vector + .type _Level2Vector,@function + .align 4 +_Level2Vector: + wsr a0, EXCSAVE_2 /* preserve a0 */ + call0 _xt_medint2 /* load interrupt handler */ + /* never returns here - call0 is used as a jump (see note at top) */ + + .end literal_prefix + + .text + .type _xt_medint2,@function + .align 4 +_xt_medint2: + mov a0, sp /* sp == a1 */ + addi sp, sp, -XT_STK_FRMSZ /* allocate interrupt stack frame */ + s32i a0, sp, XT_STK_A1 /* save pre-interrupt SP */ + rsr a0, EPS_2 /* save interruptee's PS */ + s32i a0, sp, XT_STK_PS + rsr a0, EPC_2 /* save interruptee's PC */ + s32i a0, sp, XT_STK_PC + rsr a0, EXCSAVE_2 /* save interruptee's a0 */ + s32i a0, sp, XT_STK_A0 + movi a0, _xt_medint2_exit /* save exit point for dispatch */ + s32i a0, sp, XT_STK_EXIT + + /* Save rest of interrupt context and enter RTOS. */ + call0 XT_RTOS_INT_ENTER /* common RTOS interrupt entry */ + + /* !! We are now on the RTOS system stack !! */ + + /* Set up PS for C, enable interrupts above this level and clear EXCM. */ + #ifdef __XTENSA_CALL0_ABI__ + movi a0, PS_INTLEVEL(2) | PS_UM + #else + movi a0, PS_INTLEVEL(2) | PS_UM | PS_WOE + #endif + wsr a0, PS + rsync + + /* OK to call C code at this point, dispatch user ISRs */ + + dispatch_c_isr 2 XCHAL_INTLEVEL2_MASK + + /* Done handling interrupts, transfer control to OS */ + call0 XT_RTOS_INT_EXIT /* does not return directly here */ + + /* + Exit point for dispatch. Saved in interrupt stack frame at XT_STK_EXIT + on entry and used to return to a thread or interrupted interrupt handler. + */ + .global _xt_medint2_exit + .type _xt_medint2_exit,@function + .align 4 +_xt_medint2_exit: + /* Restore only level-specific regs (the rest were already restored) */ + l32i a0, sp, XT_STK_PS /* retrieve interruptee's PS */ + wsr a0, EPS_2 + l32i a0, sp, XT_STK_PC /* retrieve interruptee's PC */ + wsr a0, EPC_2 + l32i a0, sp, XT_STK_A0 /* retrieve interruptee's A0 */ + l32i sp, sp, XT_STK_A1 /* remove interrupt stack frame */ + rsync /* ensure EPS and EPC written */ + rfi 2 + +#endif /* Level 2 */ + +#if XCHAL_EXCM_LEVEL >= 3 + + .begin literal_prefix .Level3InterruptVector + .section .Level3InterruptVector.text, "ax" + .global _Level3Vector + .type _Level3Vector,@function + .align 4 +_Level3Vector: + wsr a0, EXCSAVE_3 /* preserve a0 */ + call0 _xt_medint3 /* load interrupt handler */ + /* never returns here - call0 is used as a jump (see note at top) */ + + .end literal_prefix + + .text + .type _xt_medint3,@function + .align 4 +_xt_medint3: + mov a0, sp /* sp == a1 */ + addi sp, sp, -XT_STK_FRMSZ /* allocate interrupt stack frame */ + s32i a0, sp, XT_STK_A1 /* save pre-interrupt SP */ + rsr a0, EPS_3 /* save interruptee's PS */ + s32i a0, sp, XT_STK_PS + rsr a0, EPC_3 /* save interruptee's PC */ + s32i a0, sp, XT_STK_PC + rsr a0, EXCSAVE_3 /* save interruptee's a0 */ + s32i a0, sp, XT_STK_A0 + movi a0, _xt_medint3_exit /* save exit point for dispatch */ + s32i a0, sp, XT_STK_EXIT + + /* Save rest of interrupt context and enter RTOS. */ + call0 XT_RTOS_INT_ENTER /* common RTOS interrupt entry */ + + /* !! We are now on the RTOS system stack !! */ + + /* Set up PS for C, enable interrupts above this level and clear EXCM. */ + #ifdef __XTENSA_CALL0_ABI__ + movi a0, PS_INTLEVEL(3) | PS_UM + #else + movi a0, PS_INTLEVEL(3) | PS_UM | PS_WOE + #endif + wsr a0, PS + rsync + + /* OK to call C code at this point, dispatch user ISRs */ + + dispatch_c_isr 3 XCHAL_INTLEVEL3_MASK + + /* Done handling interrupts, transfer control to OS */ + call0 XT_RTOS_INT_EXIT /* does not return directly here */ + + /* + Exit point for dispatch. Saved in interrupt stack frame at XT_STK_EXIT + on entry and used to return to a thread or interrupted interrupt handler. + */ + .global _xt_medint3_exit + .type _xt_medint3_exit,@function + .align 4 +_xt_medint3_exit: + /* Restore only level-specific regs (the rest were already restored) */ + l32i a0, sp, XT_STK_PS /* retrieve interruptee's PS */ + wsr a0, EPS_3 + l32i a0, sp, XT_STK_PC /* retrieve interruptee's PC */ + wsr a0, EPC_3 + l32i a0, sp, XT_STK_A0 /* retrieve interruptee's A0 */ + l32i sp, sp, XT_STK_A1 /* remove interrupt stack frame */ + rsync /* ensure EPS and EPC written */ + rfi 3 + +#endif /* Level 3 */ + +#if XCHAL_EXCM_LEVEL >= 4 + + .begin literal_prefix .Level4InterruptVector + .section .Level4InterruptVector.text, "ax" + .global _Level4Vector + .type _Level4Vector,@function + .align 4 +_Level4Vector: + wsr a0, EXCSAVE_4 /* preserve a0 */ + call0 _xt_medint4 /* load interrupt handler */ + + .end literal_prefix + + .text + .type _xt_medint4,@function + .align 4 +_xt_medint4: + mov a0, sp /* sp == a1 */ + addi sp, sp, -XT_STK_FRMSZ /* allocate interrupt stack frame */ + s32i a0, sp, XT_STK_A1 /* save pre-interrupt SP */ + rsr a0, EPS_4 /* save interruptee's PS */ + s32i a0, sp, XT_STK_PS + rsr a0, EPC_4 /* save interruptee's PC */ + s32i a0, sp, XT_STK_PC + rsr a0, EXCSAVE_4 /* save interruptee's a0 */ + s32i a0, sp, XT_STK_A0 + movi a0, _xt_medint4_exit /* save exit point for dispatch */ + s32i a0, sp, XT_STK_EXIT + + /* Save rest of interrupt context and enter RTOS. */ + call0 XT_RTOS_INT_ENTER /* common RTOS interrupt entry */ + + /* !! We are now on the RTOS system stack !! */ + + /* Set up PS for C, enable interrupts above this level and clear EXCM. */ + #ifdef __XTENSA_CALL0_ABI__ + movi a0, PS_INTLEVEL(4) | PS_UM + #else + movi a0, PS_INTLEVEL(4) | PS_UM | PS_WOE + #endif + wsr a0, PS + rsync + + /* OK to call C code at this point, dispatch user ISRs */ + + dispatch_c_isr 4 XCHAL_INTLEVEL4_MASK + + /* Done handling interrupts, transfer control to OS */ + call0 XT_RTOS_INT_EXIT /* does not return directly here */ + + /* + Exit point for dispatch. Saved in interrupt stack frame at XT_STK_EXIT + on entry and used to return to a thread or interrupted interrupt handler. + */ + .global _xt_medint4_exit + .type _xt_medint4_exit,@function + .align 4 +_xt_medint4_exit: + /* Restore only level-specific regs (the rest were already restored) */ + l32i a0, sp, XT_STK_PS /* retrieve interruptee's PS */ + wsr a0, EPS_4 + l32i a0, sp, XT_STK_PC /* retrieve interruptee's PC */ + wsr a0, EPC_4 + l32i a0, sp, XT_STK_A0 /* retrieve interruptee's A0 */ + l32i sp, sp, XT_STK_A1 /* remove interrupt stack frame */ + rsync /* ensure EPS and EPC written */ + rfi 4 + +#endif /* Level 4 */ + +#if XCHAL_EXCM_LEVEL >= 5 + + .begin literal_prefix .Level5InterruptVector + .section .Level5InterruptVector.text, "ax" + .global _Level5Vector + .type _Level5Vector,@function + .align 4 +_Level5Vector: + wsr a0, EXCSAVE_5 /* preserve a0 */ + call0 _xt_medint5 /* load interrupt handler */ + + .end literal_prefix + + .text + .type _xt_medint5,@function + .align 4 +_xt_medint5: + mov a0, sp /* sp == a1 */ + addi sp, sp, -XT_STK_FRMSZ /* allocate interrupt stack frame */ + s32i a0, sp, XT_STK_A1 /* save pre-interrupt SP */ + rsr a0, EPS_5 /* save interruptee's PS */ + s32i a0, sp, XT_STK_PS + rsr a0, EPC_5 /* save interruptee's PC */ + s32i a0, sp, XT_STK_PC + rsr a0, EXCSAVE_5 /* save interruptee's a0 */ + s32i a0, sp, XT_STK_A0 + movi a0, _xt_medint5_exit /* save exit point for dispatch */ + s32i a0, sp, XT_STK_EXIT + + /* Save rest of interrupt context and enter RTOS. */ + call0 XT_RTOS_INT_ENTER /* common RTOS interrupt entry */ + + /* !! We are now on the RTOS system stack !! */ + + /* Set up PS for C, enable interrupts above this level and clear EXCM. */ + #ifdef __XTENSA_CALL0_ABI__ + movi a0, PS_INTLEVEL(5) | PS_UM + #else + movi a0, PS_INTLEVEL(5) | PS_UM | PS_WOE + #endif + wsr a0, PS + rsync + + /* OK to call C code at this point, dispatch user ISRs */ + + dispatch_c_isr 5 XCHAL_INTLEVEL5_MASK + + /* Done handling interrupts, transfer control to OS */ + call0 XT_RTOS_INT_EXIT /* does not return directly here */ + + /* + Exit point for dispatch. Saved in interrupt stack frame at XT_STK_EXIT + on entry and used to return to a thread or interrupted interrupt handler. + */ + .global _xt_medint5_exit + .type _xt_medint5_exit,@function + .align 4 +_xt_medint5_exit: + /* Restore only level-specific regs (the rest were already restored) */ + l32i a0, sp, XT_STK_PS /* retrieve interruptee's PS */ + wsr a0, EPS_5 + l32i a0, sp, XT_STK_PC /* retrieve interruptee's PC */ + wsr a0, EPC_5 + l32i a0, sp, XT_STK_A0 /* retrieve interruptee's A0 */ + l32i sp, sp, XT_STK_A1 /* remove interrupt stack frame */ + rsync /* ensure EPS and EPC written */ + rfi 5 + +#endif /* Level 5 */ + +#if XCHAL_EXCM_LEVEL >= 6 + + .begin literal_prefix .Level6InterruptVector + .section .Level6InterruptVector.text, "ax" + .global _Level6Vector + .type _Level6Vector,@function + .align 4 +_Level6Vector: + wsr a0, EXCSAVE_6 /* preserve a0 */ + call0 _xt_medint6 /* load interrupt handler */ + + .end literal_prefix + + .text + .type _xt_medint6,@function + .align 4 +_xt_medint6: + mov a0, sp /* sp == a1 */ + addi sp, sp, -XT_STK_FRMSZ /* allocate interrupt stack frame */ + s32i a0, sp, XT_STK_A1 /* save pre-interrupt SP */ + rsr a0, EPS_6 /* save interruptee's PS */ + s32i a0, sp, XT_STK_PS + rsr a0, EPC_6 /* save interruptee's PC */ + s32i a0, sp, XT_STK_PC + rsr a0, EXCSAVE_6 /* save interruptee's a0 */ + s32i a0, sp, XT_STK_A0 + movi a0, _xt_medint6_exit /* save exit point for dispatch */ + s32i a0, sp, XT_STK_EXIT + + /* Save rest of interrupt context and enter RTOS. */ + call0 XT_RTOS_INT_ENTER /* common RTOS interrupt entry */ + + /* !! We are now on the RTOS system stack !! */ + + /* Set up PS for C, enable interrupts above this level and clear EXCM. */ + #ifdef __XTENSA_CALL0_ABI__ + movi a0, PS_INTLEVEL(6) | PS_UM + #else + movi a0, PS_INTLEVEL(6) | PS_UM | PS_WOE + #endif + wsr a0, PS + rsync + + /* OK to call C code at this point, dispatch user ISRs */ + + dispatch_c_isr 6 XCHAL_INTLEVEL6_MASK + + /* Done handling interrupts, transfer control to OS */ + call0 XT_RTOS_INT_EXIT /* does not return directly here */ + + /* + Exit point for dispatch. Saved in interrupt stack frame at XT_STK_EXIT + on entry and used to return to a thread or interrupted interrupt handler. + */ + .global _xt_medint6_exit + .type _xt_medint6_exit,@function + .align 4 +_xt_medint6_exit: + /* Restore only level-specific regs (the rest were already restored) */ + l32i a0, sp, XT_STK_PS /* retrieve interruptee's PS */ + wsr a0, EPS_6 + l32i a0, sp, XT_STK_PC /* retrieve interruptee's PC */ + wsr a0, EPC_6 + l32i a0, sp, XT_STK_A0 /* retrieve interruptee's A0 */ + l32i sp, sp, XT_STK_A1 /* remove interrupt stack frame */ + rsync /* ensure EPS and EPC written */ + rfi 6 + +#endif /* Level 6 */ + + +/******************************************************************************* + +HIGH PRIORITY (LEVEL > XCHAL_EXCM_LEVEL) INTERRUPT VECTORS AND HANDLERS + +High priority interrupts are by definition those with priorities greater +than XCHAL_EXCM_LEVEL. This includes non-maskable (NMI). High priority +interrupts cannot interact with the RTOS, that is they must save all regs +they use and not call any RTOS function. + +A further restriction imposed by the Xtensa windowed architecture is that +high priority interrupts must not modify the stack area even logically +"above" the top of the interrupted stack (they need to provide their +own stack or static save area). + +Cadence Design Systems recommends high priority interrupt handlers be coded in assembly +and used for purposes requiring very short service times. + +Here are templates for high priority (level 2+) interrupt vectors. +They assume only one interrupt per level to avoid the burden of identifying +which interrupts at this level are pending and enabled. This allows for +minimum latency and avoids having to save/restore a2 in addition to a0. +If more than one interrupt per high priority level is configured, this burden +is on the handler which in any case must provide a way to save and restore +registers it uses without touching the interrupted stack. + +Each vector goes at a predetermined location according to the Xtensa +hardware configuration, which is ensured by its placement in a special +section known to the Xtensa linker support package (LSP). It performs +the minimum necessary before jumping to the handler in the .text section. + +*******************************************************************************/ + +/* +Currently only shells for high priority interrupt handlers are provided +here. However a template and example can be found in the Cadence Design Systems tools +documentation: "Microprocessor Programmer's Guide". +*/ + +#if XCHAL_NUM_INTLEVELS >=2 && XCHAL_EXCM_LEVEL <2 && XCHAL_DEBUGLEVEL !=2 + + .begin literal_prefix .Level2InterruptVector + .section .Level2InterruptVector.text, "ax" + .global _Level2Vector + .type _Level2Vector,@function + .align 4 +_Level2Vector: + wsr a0, EXCSAVE_2 /* preserve a0 */ + call0 _xt_highint2 /* load interrupt handler */ + + .end literal_prefix + + .text + .type _xt_highint2,@function + .align 4 +_xt_highint2: + + #ifdef XT_INTEXC_HOOKS + /* Call interrupt hook if present to (pre)handle interrupts. */ + movi a0, _xt_intexc_hooks + l32i a0, a0, 2<<2 + beqz a0, 1f +.Ln_xt_highint2_call_hook: + callx0 a0 /* must NOT disturb stack! */ +1: + #endif + + /* USER_EDIT: + ADD HIGH PRIORITY LEVEL 2 INTERRUPT HANDLER CODE HERE. + */ + + .align 4 +.L_xt_highint2_exit: + rsr a0, EXCSAVE_2 /* restore a0 */ + rfi 2 + +#endif /* Level 2 */ + +#if XCHAL_NUM_INTLEVELS >=3 && XCHAL_EXCM_LEVEL <3 && XCHAL_DEBUGLEVEL !=3 + + .begin literal_prefix .Level3InterruptVector + .section .Level3InterruptVector.text, "ax" + .global _Level3Vector + .type _Level3Vector,@function + .align 4 +_Level3Vector: + wsr a0, EXCSAVE_3 /* preserve a0 */ + call0 _xt_highint3 /* load interrupt handler */ + /* never returns here - call0 is used as a jump (see note at top) */ + + .end literal_prefix + + .text + .type _xt_highint3,@function + .align 4 +_xt_highint3: + + #ifdef XT_INTEXC_HOOKS + /* Call interrupt hook if present to (pre)handle interrupts. */ + movi a0, _xt_intexc_hooks + l32i a0, a0, 3<<2 + beqz a0, 1f +.Ln_xt_highint3_call_hook: + callx0 a0 /* must NOT disturb stack! */ +1: + #endif + + /* USER_EDIT: + ADD HIGH PRIORITY LEVEL 3 INTERRUPT HANDLER CODE HERE. + */ + + .align 4 +.L_xt_highint3_exit: + rsr a0, EXCSAVE_3 /* restore a0 */ + rfi 3 + +#endif /* Level 3 */ + +#if XCHAL_NUM_INTLEVELS >=4 && XCHAL_EXCM_LEVEL <4 && XCHAL_DEBUGLEVEL !=4 + + .begin literal_prefix .Level4InterruptVector + .section .Level4InterruptVector.text, "ax" + .global _Level4Vector + .type _Level4Vector,@function + .align 4 +_Level4Vector: + wsr a0, EXCSAVE_4 /* preserve a0 */ + call0 _xt_highint4 /* load interrupt handler */ + /* never returns here - call0 is used as a jump (see note at top) */ + + .end literal_prefix + + .text + .type _xt_highint4,@function + .align 4 +_xt_highint4: + + #ifdef XT_INTEXC_HOOKS + /* Call interrupt hook if present to (pre)handle interrupts. */ + movi a0, _xt_intexc_hooks + l32i a0, a0, 4<<2 + beqz a0, 1f +.Ln_xt_highint4_call_hook: + callx0 a0 /* must NOT disturb stack! */ +1: + #endif + + /* USER_EDIT: + ADD HIGH PRIORITY LEVEL 4 INTERRUPT HANDLER CODE HERE. + */ + + .align 4 +.L_xt_highint4_exit: + rsr a0, EXCSAVE_4 /* restore a0 */ + rfi 4 + +#endif /* Level 4 */ + +#if XCHAL_NUM_INTLEVELS >=5 && XCHAL_EXCM_LEVEL <5 && XCHAL_DEBUGLEVEL !=5 + + .begin literal_prefix .Level5InterruptVector + .section .Level5InterruptVector.text, "ax" + .global _Level5Vector + .type _Level5Vector,@function + .align 4 +_Level5Vector: + wsr a0, EXCSAVE_5 /* preserve a0 */ + call0 _xt_highint5 /* load interrupt handler */ + /* never returns here - call0 is used as a jump (see note at top) */ + + .end literal_prefix + + .text + .type _xt_highint5,@function + .align 4 +_xt_highint5: + + #ifdef XT_INTEXC_HOOKS + /* Call interrupt hook if present to (pre)handle interrupts. */ + movi a0, _xt_intexc_hooks + l32i a0, a0, 5<<2 + beqz a0, 1f +.Ln_xt_highint5_call_hook: + callx0 a0 /* must NOT disturb stack! */ +1: + #endif + + /* USER_EDIT: + ADD HIGH PRIORITY LEVEL 5 INTERRUPT HANDLER CODE HERE. + */ + + .align 4 +.L_xt_highint5_exit: + rsr a0, EXCSAVE_5 /* restore a0 */ + rfi 5 + +#endif /* Level 5 */ + +#if XCHAL_NUM_INTLEVELS >=6 && XCHAL_EXCM_LEVEL <6 && XCHAL_DEBUGLEVEL !=6 + + .begin literal_prefix .Level6InterruptVector + .section .Level6InterruptVector.text, "ax" + .global _Level6Vector + .type _Level6Vector,@function + .align 4 +_Level6Vector: + wsr a0, EXCSAVE_6 /* preserve a0 */ + call0 _xt_highint6 /* load interrupt handler */ + /* never returns here - call0 is used as a jump (see note at top) */ + + .end literal_prefix + + .text + .type _xt_highint6,@function + .align 4 +_xt_highint6: + + #ifdef XT_INTEXC_HOOKS + /* Call interrupt hook if present to (pre)handle interrupts. */ + movi a0, _xt_intexc_hooks + l32i a0, a0, 6<<2 + beqz a0, 1f +.Ln_xt_highint6_call_hook: + callx0 a0 /* must NOT disturb stack! */ +1: + #endif + + /* USER_EDIT: + ADD HIGH PRIORITY LEVEL 6 INTERRUPT HANDLER CODE HERE. + */ + + .align 4 +.L_xt_highint6_exit: + rsr a0, EXCSAVE_6 /* restore a0 */ + rfi 6 + +#endif /* Level 6 */ + +#if XCHAL_HAVE_NMI + + .begin literal_prefix .NMIExceptionVector + .section .NMIExceptionVector.text, "ax" + .global _NMIExceptionVector + .type _NMIExceptionVector,@function + .align 4 +_NMIExceptionVector: + wsr a0, EXCSAVE + XCHAL_NMILEVEL _ /* preserve a0 */ + call0 _xt_nmi /* load interrupt handler */ + /* never returns here - call0 is used as a jump (see note at top) */ + + .end literal_prefix + + .text + .type _xt_nmi,@function + .align 4 +_xt_nmi: + + #ifdef XT_INTEXC_HOOKS + /* Call interrupt hook if present to (pre)handle interrupts. */ + movi a0, _xt_intexc_hooks + l32i a0, a0, XCHAL_NMILEVEL<<2 + beqz a0, 1f +.Ln_xt_nmi_call_hook: + callx0 a0 /* must NOT disturb stack! */ +1: + #endif + + /* USER_EDIT: + ADD HIGH PRIORITY NON-MASKABLE INTERRUPT (NMI) HANDLER CODE HERE. + */ + + .align 4 +.L_xt_nmi_exit: + rsr a0, EXCSAVE + XCHAL_NMILEVEL /* restore a0 */ + rfi XCHAL_NMILEVEL + +#endif /* NMI */ + + +/******************************************************************************* + +WINDOW OVERFLOW AND UNDERFLOW EXCEPTION VECTORS AND ALLOCA EXCEPTION HANDLER + +Here is the code for each window overflow/underflow exception vector and +(interspersed) efficient code for handling the alloca exception cause. +Window exceptions are handled entirely in the vector area and are very +tight for performance. The alloca exception is also handled entirely in +the window vector area so comes at essentially no cost in code size. +Users should never need to modify them and Cadence Design Systems recommends +they do not. + +Window handlers go at predetermined vector locations according to the +Xtensa hardware configuration, which is ensured by their placement in a +special section known to the Xtensa linker support package (LSP). Since +their offsets in that section are always the same, the LSPs do not define +a section per vector. + +These things are coded for XEA2 only (XEA1 is not supported). + +Note on Underflow Handlers: +The underflow handler for returning from call[i+1] to call[i] +must preserve all the registers from call[i+1]'s window. +In particular, a0 and a1 must be preserved because the RETW instruction +will be reexecuted (and may even underflow if an intervening exception +has flushed call[i]'s registers). +Registers a2 and up may contain return values. + +*******************************************************************************/ + +#if XCHAL_HAVE_WINDOWED + + .section .WindowVectors.text, "ax" + +/* +-------------------------------------------------------------------------------- +Window Overflow Exception for Call4. + +Invoked if a call[i] referenced a register (a4-a15) +that contains data from ancestor call[j]; +call[j] had done a call4 to call[j+1]. +On entry here: + window rotated to call[j] start point; + a0-a3 are registers to be saved; + a4-a15 must be preserved; + a5 is call[j+1]'s stack pointer. +-------------------------------------------------------------------------------- +*/ + + .org 0x0 + .global _WindowOverflow4 +_WindowOverflow4: + + s32e a0, a5, -16 /* save a0 to call[j+1]'s stack frame */ + s32e a1, a5, -12 /* save a1 to call[j+1]'s stack frame */ + s32e a2, a5, -8 /* save a2 to call[j+1]'s stack frame */ + s32e a3, a5, -4 /* save a3 to call[j+1]'s stack frame */ + rfwo /* rotates back to call[i] position */ + +/* +-------------------------------------------------------------------------------- +Window Underflow Exception for Call4 + +Invoked by RETW returning from call[i+1] to call[i] +where call[i]'s registers must be reloaded (not live in ARs); +where call[i] had done a call4 to call[i+1]. +On entry here: + window rotated to call[i] start point; + a0-a3 are undefined, must be reloaded with call[i].reg[0..3]; + a4-a15 must be preserved (they are call[i+1].reg[0..11]); + a5 is call[i+1]'s stack pointer. +-------------------------------------------------------------------------------- +*/ + + .org 0x40 + .global _WindowUnderflow4 +_WindowUnderflow4: + + l32e a0, a5, -16 /* restore a0 from call[i+1]'s stack frame */ + l32e a1, a5, -12 /* restore a1 from call[i+1]'s stack frame */ + l32e a2, a5, -8 /* restore a2 from call[i+1]'s stack frame */ + l32e a3, a5, -4 /* restore a3 from call[i+1]'s stack frame */ + rfwu + +/* +-------------------------------------------------------------------------------- +Handle alloca exception generated by interruptee executing 'movsp'. +This uses space between the window vectors, so is essentially "free". +All interruptee's regs are intact except a0 which is saved in EXCSAVE_1, +and PS.EXCM has been set by the exception hardware (can't be interrupted). +The fact the alloca exception was taken means the registers associated with +the base-save area have been spilled and will be restored by the underflow +handler, so those 4 registers are available for scratch. +The code is optimized to avoid unaligned branches and minimize cache misses. +-------------------------------------------------------------------------------- +*/ + + .align 4 + .global _xt_alloca_exc +_xt_alloca_exc: + + rsr a0, WINDOWBASE /* grab WINDOWBASE before rotw changes it */ + rotw -1 /* WINDOWBASE goes to a4, new a0-a3 are scratch */ + rsr a2, PS + extui a3, a2, XCHAL_PS_OWB_SHIFT, XCHAL_PS_OWB_BITS + xor a3, a3, a4 /* bits changed from old to current windowbase */ + rsr a4, EXCSAVE_1 /* restore original a0 (now in a4) */ + slli a3, a3, XCHAL_PS_OWB_SHIFT + xor a2, a2, a3 /* flip changed bits in old window base */ + wsr a2, PS /* update PS.OWB to new window base */ + rsync + + _bbci.l a4, 31, _WindowUnderflow4 + rotw -1 /* original a0 goes to a8 */ + _bbci.l a8, 30, _WindowUnderflow8 + rotw -1 + j _WindowUnderflow12 + +/* +-------------------------------------------------------------------------------- +Window Overflow Exception for Call8 + +Invoked if a call[i] referenced a register (a4-a15) +that contains data from ancestor call[j]; +call[j] had done a call8 to call[j+1]. +On entry here: + window rotated to call[j] start point; + a0-a7 are registers to be saved; + a8-a15 must be preserved; + a9 is call[j+1]'s stack pointer. +-------------------------------------------------------------------------------- +*/ + + .org 0x80 + .global _WindowOverflow8 +_WindowOverflow8: + + s32e a0, a9, -16 /* save a0 to call[j+1]'s stack frame */ + l32e a0, a1, -12 /* a0 <- call[j-1]'s sp + (used to find end of call[j]'s frame) */ + s32e a1, a9, -12 /* save a1 to call[j+1]'s stack frame */ + s32e a2, a9, -8 /* save a2 to call[j+1]'s stack frame */ + s32e a3, a9, -4 /* save a3 to call[j+1]'s stack frame */ + s32e a4, a0, -32 /* save a4 to call[j]'s stack frame */ + s32e a5, a0, -28 /* save a5 to call[j]'s stack frame */ + s32e a6, a0, -24 /* save a6 to call[j]'s stack frame */ + s32e a7, a0, -20 /* save a7 to call[j]'s stack frame */ + rfwo /* rotates back to call[i] position */ + +/* +-------------------------------------------------------------------------------- +Window Underflow Exception for Call8 + +Invoked by RETW returning from call[i+1] to call[i] +where call[i]'s registers must be reloaded (not live in ARs); +where call[i] had done a call8 to call[i+1]. +On entry here: + window rotated to call[i] start point; + a0-a7 are undefined, must be reloaded with call[i].reg[0..7]; + a8-a15 must be preserved (they are call[i+1].reg[0..7]); + a9 is call[i+1]'s stack pointer. +-------------------------------------------------------------------------------- +*/ + + .org 0xC0 + .global _WindowUnderflow8 +_WindowUnderflow8: + + l32e a0, a9, -16 /* restore a0 from call[i+1]'s stack frame */ + l32e a1, a9, -12 /* restore a1 from call[i+1]'s stack frame */ + l32e a2, a9, -8 /* restore a2 from call[i+1]'s stack frame */ + l32e a7, a1, -12 /* a7 <- call[i-1]'s sp + (used to find end of call[i]'s frame) */ + l32e a3, a9, -4 /* restore a3 from call[i+1]'s stack frame */ + l32e a4, a7, -32 /* restore a4 from call[i]'s stack frame */ + l32e a5, a7, -28 /* restore a5 from call[i]'s stack frame */ + l32e a6, a7, -24 /* restore a6 from call[i]'s stack frame */ + l32e a7, a7, -20 /* restore a7 from call[i]'s stack frame */ + rfwu + +/* +-------------------------------------------------------------------------------- +Window Overflow Exception for Call12 + +Invoked if a call[i] referenced a register (a4-a15) +that contains data from ancestor call[j]; +call[j] had done a call12 to call[j+1]. +On entry here: + window rotated to call[j] start point; + a0-a11 are registers to be saved; + a12-a15 must be preserved; + a13 is call[j+1]'s stack pointer. +-------------------------------------------------------------------------------- +*/ + + .org 0x100 + .global _WindowOverflow12 +_WindowOverflow12: + + s32e a0, a13, -16 /* save a0 to call[j+1]'s stack frame */ + l32e a0, a1, -12 /* a0 <- call[j-1]'s sp + (used to find end of call[j]'s frame) */ + s32e a1, a13, -12 /* save a1 to call[j+1]'s stack frame */ + s32e a2, a13, -8 /* save a2 to call[j+1]'s stack frame */ + s32e a3, a13, -4 /* save a3 to call[j+1]'s stack frame */ + s32e a4, a0, -48 /* save a4 to end of call[j]'s stack frame */ + s32e a5, a0, -44 /* save a5 to end of call[j]'s stack frame */ + s32e a6, a0, -40 /* save a6 to end of call[j]'s stack frame */ + s32e a7, a0, -36 /* save a7 to end of call[j]'s stack frame */ + s32e a8, a0, -32 /* save a8 to end of call[j]'s stack frame */ + s32e a9, a0, -28 /* save a9 to end of call[j]'s stack frame */ + s32e a10, a0, -24 /* save a10 to end of call[j]'s stack frame */ + s32e a11, a0, -20 /* save a11 to end of call[j]'s stack frame */ + rfwo /* rotates back to call[i] position */ + +/* +-------------------------------------------------------------------------------- +Window Underflow Exception for Call12 + +Invoked by RETW returning from call[i+1] to call[i] +where call[i]'s registers must be reloaded (not live in ARs); +where call[i] had done a call12 to call[i+1]. +On entry here: + window rotated to call[i] start point; + a0-a11 are undefined, must be reloaded with call[i].reg[0..11]; + a12-a15 must be preserved (they are call[i+1].reg[0..3]); + a13 is call[i+1]'s stack pointer. +-------------------------------------------------------------------------------- +*/ + + .org 0x140 + .global _WindowUnderflow12 +_WindowUnderflow12: + + l32e a0, a13, -16 /* restore a0 from call[i+1]'s stack frame */ + l32e a1, a13, -12 /* restore a1 from call[i+1]'s stack frame */ + l32e a2, a13, -8 /* restore a2 from call[i+1]'s stack frame */ + l32e a11, a1, -12 /* a11 <- call[i-1]'s sp + (used to find end of call[i]'s frame) */ + l32e a3, a13, -4 /* restore a3 from call[i+1]'s stack frame */ + l32e a4, a11, -48 /* restore a4 from end of call[i]'s stack frame */ + l32e a5, a11, -44 /* restore a5 from end of call[i]'s stack frame */ + l32e a6, a11, -40 /* restore a6 from end of call[i]'s stack frame */ + l32e a7, a11, -36 /* restore a7 from end of call[i]'s stack frame */ + l32e a8, a11, -32 /* restore a8 from end of call[i]'s stack frame */ + l32e a9, a11, -28 /* restore a9 from end of call[i]'s stack frame */ + l32e a10, a11, -24 /* restore a10 from end of call[i]'s stack frame */ + l32e a11, a11, -20 /* restore a11 from end of call[i]'s stack frame */ + rfwu + +#endif /* XCHAL_HAVE_WINDOWED */ + diff --git a/FreeRTOS/Source/stream_buffer.c b/FreeRTOS/Source/stream_buffer.c index 392d04d37..8d0e3a523 100644 --- a/FreeRTOS/Source/stream_buffer.c +++ b/FreeRTOS/Source/stream_buffer.c @@ -224,7 +224,14 @@ static void prvInitialiseNewStreamBuffer( StreamBuffer_t * const pxStreamBuffer, (that is, it will hold discrete messages with a little meta data that says how big the next message is) check the buffer will be large enough to hold at least one message. */ - configASSERT( xBufferSizeBytes > sbBYTES_TO_STORE_MESSAGE_LENGTH ); + if( xIsMessageBuffer == pdTRUE ) + { + configASSERT( xBufferSizeBytes > sbBYTES_TO_STORE_MESSAGE_LENGTH ); + } + else + { + configASSERT( xBufferSizeBytes > 0 ); + } configASSERT( xTriggerLevelBytes <= xBufferSizeBytes ); /* A trigger level of 0 would cause a waiting task to unblock even when -- 2.39.5