Add stubs for official RISC-V RV32 port.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@2557 1d2547de-c912-0410-9cb9-b8ca96c0e9e2

diff --git a/FreeRTOS/Source/portable/GCC/RISC-V-RV32/port.c b/FreeRTOS/Source/portable/GCC/RISC-V-RV32/port.c
new file mode 100644 (file)
index 0000000..f14c58c
--- /dev/null
+++ b/FreeRTOS/Source/portable/GCC/RISC-V-RV32/port.c
@@ -0,0 +1,81 @@
+/*\r
+ * FreeRTOS Kernel V10.0.1\r
+ * Copyright (C) 2017 Amazon.com, Inc. or its affiliates.  All Rights Reserved.\r
+ *\r
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of\r
+ * this software and associated documentation files (the "Software"), to deal in\r
+ * the Software without restriction, including without limitation the rights to\r
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of\r
+ * the Software, and to permit persons to whom the Software is furnished to do so,\r
+ * subject to the following conditions:\r
+ *\r
+ * The above copyright notice and this permission notice shall be included in all\r
+ * copies or substantial portions of the Software.\r
+ *\r
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS\r
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR\r
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
+ *\r
+ * http://www.FreeRTOS.org\r
+ * http://aws.amazon.com/freertos\r
+ *\r
+ * 1 tab == 4 spaces!\r
+ */\r
+\r
+/*-----------------------------------------------------------\r
+ * Implementation of functions defined in portable.h for the RISC-V RV32 port.\r
+ *----------------------------------------------------------*/\r
+\r
+/* Scheduler includes. */\r
+#include "FreeRTOS.h"\r
+#include "task.h"\r
+#include "portmacro.h"\r
+\r
+/*\r
+ * Setup the timer to generate the tick interrupts.  The implementation in this\r
+ * file is weak to allow application writers to change the timer used to\r
+ * generate the tick interrupt.\r
+ */\r
+void vPortSetupTimerInterrupt( void );\r
+\r
+/*\r
+ * Used to catch tasks that attempt to return from their implementing function.\r
+ */\r
+static void prvTaskExitError( void );\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+void prvTaskExitError( void )\r
+{\r
+       /* A function that implements a task must not exit or attempt to return to\r
+       its caller as there is nothing to return to.  If a task wants to exit it\r
+       should instead call vTaskDelete( NULL ).\r
+\r
+       Artificially force an assert() to be triggered if configASSERT() is\r
+       defined, then stop here so application writers can catch the error. */\r
+       configASSERT( uxCriticalNesting == ~0UL );\r
+       portDISABLE_INTERRUPTS();\r
+       for( ;; );\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+/*\r
+ * See header file for description.\r
+ */\r
+StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters )\r
+{\r
+       return pxTopOfStack;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+BaseType_t xPortStartScheduler( void )\r
+{\r
+       /*Should not get here*/\r
+       return pdFALSE;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+\r

diff --git a/FreeRTOS/Source/portable/GCC/RISC-V-RV32/portmacro.h b/FreeRTOS/Source/portable/GCC/RISC-V-RV32/portmacro.h
new file mode 100644 (file)
index 0000000..de8b860
--- /dev/null
+++ b/FreeRTOS/Source/portable/GCC/RISC-V-RV32/portmacro.h
@@ -0,0 +1,115 @@
+/*\r
+ * FreeRTOS Kernel V10.0.1\r
+ * Copyright (C) 2017 Amazon.com, Inc. or its affiliates.  All Rights Reserved.\r
+ *\r
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of\r
+ * this software and associated documentation files (the "Software"), to deal in\r
+ * the Software without restriction, including without limitation the rights to\r
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of\r
+ * the Software, and to permit persons to whom the Software is furnished to do so,\r
+ * subject to the following conditions:\r
+ *\r
+ * The above copyright notice and this permission notice shall be included in all\r
+ * copies or substantial portions of the Software.\r
+ *\r
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS\r
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR\r
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
+ *\r
+ * http://www.FreeRTOS.org\r
+ * http://aws.amazon.com/freertos\r
+ *\r
+ * 1 tab == 4 spaces!\r
+ */\r
+\r
+\r
+#ifndef PORTMACRO_H\r
+#define PORTMACRO_H\r
+\r
+#ifdef __cplusplus\r
+extern "C" {\r
+#endif\r
+\r
+/*-----------------------------------------------------------\r
+ * Port specific definitions.\r
+ *\r
+ * The settings in this file configure FreeRTOS correctly for the\r
+ * given hardware and compiler.\r
+ *\r
+ * These settings should not be altered.\r
+ *-----------------------------------------------------------\r
+ */\r
+\r
+#ifdef __riscv64\r
+       #error This is the RV32 port that supports 32-bit cores only.\r
+#endif\r
+\r
+/* Type definitions. */\r
+#define portSTACK_TYPE uint32_t\r
+#define portBASE_TYPE  long\r
+\r
+typedef portSTACK_TYPE StackType_t;\r
+typedef long BaseType_t;\r
+typedef unsigned long UBaseType_t;\r
+typedef uint32_t TickType_t;\r
+#define portMAX_DELAY ( TickType_t ) 0xffffffffUL\r
+\r
+/* 32-bit tick type on a 32-bit architecture, so reads of the tick count do\r
+not need to be guarded with a critical section. */\r
+#define portTICK_TYPE_IS_ATOMIC 1\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Architecture specifics. */\r
+#define portSTACK_GROWTH                       ( -1 )\r
+#define portTICK_PERIOD_MS                     ( ( TickType_t ) 1000 / configTICK_RATE_HZ )\r
+#define portBYTE_ALIGNMENT                     4\r
+/*-----------------------------------------------------------*/\r
+\r
+\r
+/* Scheduler utilities. */\r
+#define portYIELD()\r
+#define portEND_SWITCHING_ISR( xSwitchRequired ) if( xSwitchRequired ) vPortYield()\r
+#define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )\r
+/*-----------------------------------------------------------*/\r
+\r
+\r
+/* Critical section management. */\r
+#define portCRITICAL_NESTING_IN_TCB                                    1\r
+extern int vPortSetInterruptMask( void );\r
+extern void vPortClearInterruptMask( int );\r
+\r
+#define portSET_INTERRUPT_MASK_FROM_ISR()\r
+#define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedStatusValue )\r
+#define portDISABLE_INTERRUPTS()\r
+#define portENABLE_INTERRUPTS()\r
+#define portENTER_CRITICAL()\r
+#define portEXIT_CRITICAL()\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Task function macros as described on the FreeRTOS.org WEB site.  These are\r
+not necessary for to use this port.  They are defined so the common demo files\r
+(which build with all the ports) will build. */\r
+#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )\r
+#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+#define portNOP() __asm volatile       ( " nop " )\r
+\r
+#define portINLINE     __inline\r
+\r
+#ifndef portFORCE_INLINE\r
+       #define portFORCE_INLINE inline __attribute__(( always_inline))\r
+#endif\r
+portFORCE_INLINE static BaseType_t xPortIsInsideInterrupt( void ) {}\r
+\r
+#ifdef __cplusplus\r
+}\r
+#endif\r
+\r
+#endif /* PORTMACRO_H */\r
+\r