Add initial PPC405 files - this is a work in progress not a completed port.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@216 1d2547de-c912-0410-9cb9-b8ca96c0e9e2

diff --git a/Source/portable/GCC/PPC405/port.c b/Source/portable/GCC/PPC405/port.c
new file mode 100644 (file)
index 0000000..8801d72
--- /dev/null
+++ b/Source/portable/GCC/PPC405/port.c
@@ -0,0 +1,227 @@
+/*\r
+       FreeRTOS.org V4.7.1 - Copyright (C) 2003-2008 Richard Barry.\r
+\r
+       This file is part of the FreeRTOS.org distribution.\r
+\r
+       FreeRTOS.org is free software; you can redistribute it and/or modify\r
+       it under the terms of the GNU General Public License as published by\r
+       the Free Software Foundation; either version 2 of the License, or\r
+       (at your option) any later version.\r
+\r
+       FreeRTOS.org is distributed in the hope that it will be useful,\r
+       but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
+       GNU General Public License for more details.\r
+\r
+       You should have received a copy of the GNU General Public License\r
+       along with FreeRTOS.org; if not, write to the Free Software\r
+       Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA\r
+\r
+       A special exception to the GPL can be applied should you wish to distribute\r
+       a combined work that includes FreeRTOS.org, without being obliged to provide\r
+       the source code for any proprietary components.  See the licensing section \r
+       of http://www.FreeRTOS.org for full details of how and when the exception\r
+       can be applied.\r
+\r
+       ***************************************************************************\r
+\r
+       Please ensure to read the configuration and relevant port sections of the \r
+       online documentation.\r
+\r
+       +++ http://www.FreeRTOS.org +++\r
+       Documentation, latest information, license and contact details.  \r
+\r
+       +++ http://www.SafeRTOS.com +++\r
+       A version that is certified for use in safety critical systems.\r
+\r
+       +++ http://www.OpenRTOS.com +++\r
+       Commercial support, development, porting, licensing and training services.\r
+\r
+       ***************************************************************************\r
+*/\r
+\r
+/*-----------------------------------------------------------\r
+ * Implementation of functions defined in portable.h for the MicroBlaze port.\r
+ *----------------------------------------------------------*/\r
+\r
+\r
+/* Scheduler includes. */\r
+#include "FreeRTOS.h"\r
+#include "task.h"\r
+\r
+/* Library includes. */\r
+#include "xexception_l.h"\r
+#include "xtime_l.h"\r
+\r
+/* Standard includes. */\r
+#include <string.h>\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+#define portCRITICAL_INTERRUPT_ENABLE  ( 1UL << 14UL )\r
+#define portEXTERNAL_INTERRUPT_ENABLE  ( 1UL << 16UL )\r
+#define portMACHINE_CHECK_ENABLE               ( 1UL << 19UL )\r
+#define portINITIAL_MSR                ( portCRITICAL_INTERRUPT_ENABLE | portEXTERNAL_INTERRUPT_ENABLE | portMACHINE_CHECK_ENABLE )\r
+\r
+/*\r
+ */\r
+static void prvSetupTimerInterrupt( void );\r
+extern void vStartFirstTask( void );\r
+/*-----------------------------------------------------------*/\r
+\r
+static void prvTickISR( void );\r
+extern void vPortYield( void );\r
+\r
+/* \r
+ * Initialise the stack of a task to look exactly as if a call to \r
+ * portSAVE_CONTEXT had been made.\r
+ * \r
+ * See the header file portable.h.\r
+ */\r
+portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )\r
+{\r
+       /* Place a known value at the bottom of the stack for debugging. */\r
+       *pxTopOfStack = 0xDEADBEEF;\r
+       *pxTopOfStack--;\r
+\r
+       *pxTopOfStack = 0x10000001UL;;  /* R0. */\r
+       pxTopOfStack--;\r
+                                                                       /* SP. */\r
+       *pxTopOfStack = 0x31313131UL;   /* R31. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x30303030UL;   /* R30. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x29292929UL;   /* R29. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x28282828UL;   /* R28. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x27272727UL;   /* R27. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x26262626UL;   /* R26. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x25252525UL;   /* R25. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x24242424UL;   /* R24. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x23232323UL;   /* R23. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x22222222UL;   /* R22. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x21212121UL;   /* R21. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x20202020UL;   /* R20. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x19191919UL;   /* R19. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x18181818UL;   /* R18. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x17171717UL;   /* R17. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x16161616UL;   /* R16. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x15151515UL;   /* R15. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x14141414UL;   /* R14. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x13131313UL;   /* R13. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x12121212UL;   /* R12. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x11111111UL;   /* R11. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x10101010UL;   /* R10. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x09090909UL;   /* R9. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x08080808UL;   /* R8. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x07070707UL;   /* R7. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x06060606UL;   /* R6. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x05050505UL;   /* R5. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x04040404UL;   /* R4. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = ( portSTACK_TYPE ) pvParameters;\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x02020202UL;   /* R2. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x00000000;             /* CR. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x00000000;             /* XER. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x00000000;             /* LR. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x00000000;             /* CTR. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = 0x00000000;             /* USPRG0. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* SRR0. */\r
+       pxTopOfStack--;\r
+       *pxTopOfStack = portINITIAL_MSR;/* SRR1. */\r
+       pxTopOfStack--;\r
+\r
+       return pxTopOfStack;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+portBASE_TYPE xPortStartScheduler( void )\r
+{\r
+extern void *pxCurrentTCB;\r
+\r
+       prvSetupTimerInterrupt();\r
+       vStartFirstTask();\r
+       \r
+       /* Should not get here as the tasks are now running! */\r
+       return pdFALSE;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+void vPortEndScheduler( void )\r
+{\r
+       /* Not implemented. */\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+/*\r
+ * Hardware initialisation to generate the RTOS tick.   \r
+ */\r
+static void prvSetupTimerInterrupt( void )\r
+{\r
+const unsigned portLONG ulInterval = ( ( configCPU_CLOCK_HZ / configTICK_RATE_HZ ) - 1UL );\r
+\r
+       XExc_Init();\r
+       XExc_mDisableExceptions( XEXC_NON_CRITICAL ) ;  \r
+       XExc_RegisterHandler( XEXC_ID_PIT_INT, ( XExceptionHandler ) prvTickISR, ( void * ) 0 );\r
+       XExc_RegisterHandler( XEXC_ID_SYSTEM_CALL, ( XExceptionHandler ) vPortYield, ( void * ) 0 );\r
+\r
+       XTime_PITEnableAutoReload();\r
+       XTime_PITEnableInterrupt();\r
+       XTime_PITSetInterval( ulInterval );\r
+       XTime_PITEnableInterrupt();\r
+       \r
+       XExc_mEnableExceptions( XEXC_NON_CRITICAL ) ;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+static void prvTickISR( void )\r
+{\r
+static unsigned portLONG ulTicks = 0;\r
+\r
+       ulTicks++;\r
+       if( ulTicks >= 1000 )\r
+       {\r
+               vParTestToggleLED( 0 );\r
+               ulTicks = 0;\r
+       }\r
+       XTime_PITClearInterrupt();\r
+       \r
+       #if configUSE_PREEMPTION == 1\r
+       #endif\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+\r
+\r
+\r

diff --git a/Source/portable/GCC/PPC405/portasm.s b/Source/portable/GCC/PPC405/portasm.s
new file mode 100644 (file)
index 0000000..6849a8d
--- /dev/null
+++ b/Source/portable/GCC/PPC405/portasm.s
@@ -0,0 +1,104 @@
+       .extern pxCurrentTCB\r
+       .extern vTaskSwitchContext\r
+\r
+       .global vStartFirstTask\r
+       .global vPortYield\r
+\r
+.set portCONTEXT_SIZE, 156\r
+.set portR0_OFFSET, 152\r
+.set portGPR_OFFSET, 32\r
+.set portCR_OFFSET, 28\r
+.set portXER_OFFSET, 24\r
+.set portLR_OFFSET, 20\r
+.set portCTR_OFFSET, 16\r
+.set portUSPRG0_OFFSET, 12\r
+.set portSRR0_OFFSET, 8\r
+.set portSRR1_OFFSET, 4\r
+\r
+.macro portRESTORE_CONTEXT\r
+\r
+       # Get the address of the TCB.\r
+       xor             R0, R0, R0\r
+    addis   SP, R0, pxCurrentTCB@ha\r
+    lwz                SP,     pxCurrentTCB@l( SP )\r
+\r
+       # Get the task stack pointer from the TCB.\r
+       lwz             SP, 0( SP )\r
+\r
+       # Pop the special purpose registers\r
+       lwz             R0, portSRR1_OFFSET( SP )\r
+       mtspr   SRR1, R0\r
+       lwz             R0, portSRR0_OFFSET( SP )\r
+       mtspr   SRR0, R0\r
+       lwz             R0, portUSPRG0_OFFSET( SP )\r
+       mtspr   256, R0 #USPRG0\r
+       lwz             R0, portCTR_OFFSET( SP )\r
+       mtspr   CTR, R0\r
+       lwz             R0, portLR_OFFSET( SP )\r
+       mtspr   LR, R0\r
+       lwz             R0, portXER_OFFSET( SP )\r
+       mtspr   XER, R0\r
+       lwz             R0, portCR_OFFSET( SP )\r
+       mtcr    R0\r
+\r
+       # Pop GPRs\r
+       lmw             R2, portGPR_OFFSET( SP )\r
+\r
+       # Finally pop R0 and correct the stack pointer\r
+       lwz             R0, portR0_OFFSET( SP )\r
+       addi    R1, R1, portCONTEXT_SIZE\r
+\r
+       # Start the task running\r
+       rfi\r
+\r
+       .endm\r
+\r
+.macro portSAVE_CONTEXT\r
+\r
+       # Make room on the stack.\r
+       subi    R1, R1, portCONTEXT_SIZE\r
+\r
+       # Push R0, then the GPRs\r
+       stw             R0, portR0_OFFSET( SP )\r
+       stm             R2, portGPR_OFFSET( SP )\r
+\r
+       # Push the SFRs\r
+       mfcr    R0\r
+       stw             R0, portCR_OFFSET( SP )\r
+       mfspr   R0, XER\r
+       stw             R0, portXER_OFFSET( SP )\r
+       mfspr   R0, LR\r
+       stw             R0, portLR_OFFSET( SP )\r
+       mfspr   R0, CTR\r
+       stw             R0, portCTR_OFFSET( SP )\r
+       mfspr   R0, 256 #USPRG0\r
+       stw             R0, portUSPRG0_OFFSET( SP )\r
+       mfspr   R0, SRR0\r
+       stw             R0, portSRR0_OFFSET( SP )\r
+       mfspr   R0, SRR1\r
+       stw             R0, portSRR1_OFFSET( SP )\r
+\r
+       # Get the address of the TCB.\r
+       xor             R0, R0, R0\r
+       addis   R2, R0, pxCurrentTCB@ha\r
+       lwz             R2,     pxCurrentTCB@l( R2 )\r
+\r
+       # Store the stack pointer into the TCB\r
+       stw             SP,     0( R2 )\r
+\r
+       .endm\r
+\r
+vStartFirstTask:\r
+       portRESTORE_CONTEXT\r
+       rfi\r
+\r
+\r
+\r
+vPortYield:\r
+\r
+       portSAVE_CONTEXT\r
+       bl vTaskSwitchContext\r
+       portRESTORE_CONTEXT\r
+\r
+       NOP\r
+       NOP\r

diff --git a/Source/portable/GCC/PPC405/portmacro.h b/Source/portable/GCC/PPC405/portmacro.h
new file mode 100644 (file)
index 0000000..478c117
--- /dev/null
+++ b/Source/portable/GCC/PPC405/portmacro.h
@@ -0,0 +1,113 @@
+/*\r
+       FreeRTOS.org V4.7.1 - Copyright (C) 2003-2008 Richard Barry.\r
+\r
+       This file is part of the FreeRTOS.org distribution.\r
+\r
+       FreeRTOS.org is free software; you can redistribute it and/or modify\r
+       it under the terms of the GNU General Public License as published by\r
+       the Free Software Foundation; either version 2 of the License, or\r
+       (at your option) any later version.\r
+\r
+       FreeRTOS.org is distributed in the hope that it will be useful,\r
+       but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
+       GNU General Public License for more details.\r
+\r
+       You should have received a copy of the GNU General Public License\r
+       along with FreeRTOS.org; if not, write to the Free Software\r
+       Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA\r
+\r
+       A special exception to the GPL can be applied should you wish to distribute\r
+       a combined work that includes FreeRTOS.org, without being obliged to provide\r
+       the source code for any proprietary components.  See the licensing section \r
+       of http://www.FreeRTOS.org for full details of how and when the exception\r
+       can be applied.\r
+\r
+       ***************************************************************************\r
+\r
+       Please ensure to read the configuration and relevant port sections of the \r
+       online documentation.\r
+\r
+       +++ http://www.FreeRTOS.org +++\r
+       Documentation, latest information, license and contact details.  \r
+\r
+       +++ http://www.SafeRTOS.com +++\r
+       A version that is certified for use in safety critical systems.\r
+\r
+       +++ http://www.OpenRTOS.com +++\r
+       Commercial support, development, porting, licensing and training services.\r
+\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
+/* Type definitions. */\r
+#define portCHAR               char\r
+#define portFLOAT              float\r
+#define portDOUBLE             double\r
+#define portLONG               long\r
+#define portSHORT              short\r
+#define portSTACK_TYPE unsigned portLONG\r
+#define portBASE_TYPE  portLONG\r
+\r
+#if( configUSE_16_BIT_TICKS == 1 )\r
+       typedef unsigned portSHORT portTickType;\r
+       #define portMAX_DELAY ( portTickType ) 0xffff\r
+#else\r
+       typedef unsigned portLONG portTickType;\r
+       #define portMAX_DELAY ( portTickType ) 0xffffffff\r
+#endif\r
+/*-----------------------------------------------------------*/        \r
+\r
+/* Interrupt control macros. */\r
+#define portDISABLE_INTERRUPTS()       \r
+#define portENABLE_INTERRUPTS()                \r
+/*-----------------------------------------------------------*/\r
+\r
+/* Critical section macros. */\r
+void vPortEnterCritical( void );\r
+void vPortExitCritical( void );\r
+#define portENTER_CRITICAL()                                                                   \r
+#define portEXIT_CRITICAL()\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Task utilities. */\r
+void vPortYield( void );\r
+#define portYIELD() asm volatile ( "SC" )\r
+#define portYIELD_FROM_ISR()\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Hardware specifics. */\r
+#define portBYTE_ALIGNMENT                     8\r
+#define portSTACK_GROWTH                       ( -1 )\r
+#define portTICK_RATE_MS                       ( ( portTickType ) 1000 / configTICK_RATE_HZ )          \r
+#define portNOP()                                      asm volatile ( "NOP" )\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Task function macros as described on the FreeRTOS.org WEB site. */\r
+#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )\r
+#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )\r
+\r
+#ifdef __cplusplus\r
+}\r
+#endif\r
+\r
+#endif /* PORTMACRO_H */\r
+\r