--- /dev/null
+/*\r
+ FreeRTOS V8.2.0 - Copyright (C) 2015 Real Time Engineers Ltd.\r
+ All rights reserved\r
+\r
+ VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.\r
+\r
+ This file is part of the FreeRTOS distribution.\r
+\r
+ FreeRTOS is free software; you can redistribute it and/or modify it under\r
+ the terms of the GNU General Public License (version 2) as published by the\r
+ Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.\r
+\r
+ ***************************************************************************\r
+ >>! NOTE: The modification to the GPL is included to allow you to !<<\r
+ >>! distribute a combined work that includes FreeRTOS without being !<<\r
+ >>! obliged to provide the source code for proprietary components !<<\r
+ >>! outside of the FreeRTOS kernel. !<<\r
+ ***************************************************************************\r
+\r
+ FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\r
+ FOR A PARTICULAR PURPOSE. Full license text is available on the following\r
+ link: http://www.freertos.org/a00114.html\r
+\r
+ ***************************************************************************\r
+ * *\r
+ * FreeRTOS provides completely free yet professionally developed, *\r
+ * robust, strictly quality controlled, supported, and cross *\r
+ * platform software that is more than just the market leader, it *\r
+ * is the industry's de facto standard. *\r
+ * *\r
+ * Help yourself get started quickly while simultaneously helping *\r
+ * to support the FreeRTOS project by purchasing a FreeRTOS *\r
+ * tutorial book, reference manual, or both: *\r
+ * http://www.FreeRTOS.org/Documentation *\r
+ * *\r
+ ***************************************************************************\r
+\r
+ http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading\r
+ the FAQ page "My application does not run, what could be wrong?". Have you\r
+ defined configASSERT()?\r
+\r
+ http://www.FreeRTOS.org/support - In return for receiving this top quality\r
+ embedded software for free we request you assist our global community by\r
+ participating in the support forum.\r
+\r
+ http://www.FreeRTOS.org/training - Investing in training allows your team to\r
+ be as productive as possible as early as possible. Now you can receive\r
+ FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers\r
+ Ltd, and the world's leading authority on the world's leading RTOS.\r
+\r
+ http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,\r
+ including FreeRTOS+Trace - an indispensable productivity tool, a DOS\r
+ compatible FAT file system, and our tiny thread aware UDP/IP stack.\r
+\r
+ http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.\r
+ Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.\r
+\r
+ http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High\r
+ Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS\r
+ licenses offer ticketed support, indemnification and commercial middleware.\r
+\r
+ http://www.SafeRTOS.com - High Integrity Systems also provide a safety\r
+ engineered and independently SIL3 certified version for use in safety and\r
+ mission critical applications that require provable dependability.\r
+\r
+ 1 tab == 4 spaces!\r
+*/\r
+\r
+#include <FreeRTOSConfig.h>\r
+\r
+ RSEG CODE:CODE(2)\r
+ thumb\r
+\r
+ EXTERN pxCurrentTCB\r
+ EXTERN vTaskSwitchContext\r
+\r
+ PUBLIC xPortPendSVHandler\r
+ PUBLIC vPortSVCHandler\r
+ PUBLIC vPortStartFirstTask\r
+ PUBLIC vPortEnableVFP\r
+\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+xPortPendSVHandler:\r
+ mrs r0, psp\r
+ isb\r
+ /* Get the location of the current TCB. */\r
+ ldr r3, =pxCurrentTCB\r
+ ldr r2, [r3]\r
+\r
+ /* Is the task using the FPU context? If so, push high vfp registers. */\r
+ tst r14, #0x10\r
+ it eq\r
+ vstmdbeq r0!, {s16-s31}\r
+\r
+ /* Save the core registers. */\r
+ stmdb r0!, {r4-r11, r14}\r
+\r
+ /* Save the new top of stack into the first member of the TCB. */\r
+ str r0, [r2]\r
+\r
+ stmdb sp!, {r3}\r
+ mov r0, #configMAX_SYSCALL_INTERRUPT_PRIORITY\r
+ cpsid i\r
+ msr basepri, r0\r
+ dsb\r
+ isb\r
+ cpsie i\r
+ bl vTaskSwitchContext\r
+ mov r0, #0\r
+ msr basepri, r0\r
+ ldmia sp!, {r3}\r
+\r
+ /* The first item in pxCurrentTCB is the task top of stack. */\r
+ ldr r1, [r3]\r
+ ldr r0, [r1]\r
+\r
+ /* Pop the core registers. */\r
+ ldmia r0!, {r4-r11, r14}\r
+\r
+ /* Is the task using the FPU context? If so, pop the high vfp registers\r
+ too. */\r
+ tst r14, #0x10\r
+ it eq\r
+ vldmiaeq r0!, {s16-s31}\r
+\r
+ msr psp, r0\r
+ isb\r
+ #ifdef WORKAROUND_PMU_CM001 /* XMC4000 specific errata */\r
+ #if WORKAROUND_PMU_CM001 == 1\r
+ push { r14 }\r
+ pop { pc }\r
+ #endif\r
+ #endif\r
+\r
+ bx r14\r
+\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+vPortSVCHandler:\r
+ /* Get the location of the current TCB. */\r
+ ldr r3, =pxCurrentTCB\r
+ ldr r1, [r3]\r
+ ldr r0, [r1]\r
+ /* Pop the core registers. */\r
+ ldmia r0!, {r4-r11, r14}\r
+ msr psp, r0\r
+ isb\r
+ mov r0, #0\r
+ msr basepri, r0\r
+ bx r14\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+vPortStartFirstTask\r
+ /* Use the NVIC offset register to locate the stack. */\r
+ ldr r0, =0xE000ED08\r
+ ldr r0, [r0]\r
+ ldr r0, [r0]\r
+ /* Set the msp back to the start of the stack. */\r
+ msr msp, r0\r
+ /* Call SVC to start the first task. */\r
+ cpsie i\r
+ cpsie f\r
+ dsb\r
+ isb\r
+ svc 0\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+vPortEnableVFP:\r
+ /* The FPU enable bits are in the CPACR. */\r
+ ldr.w r0, =0xE000ED88\r
+ ldr r1, [r0]\r
+\r
+ /* Enable CP10 and CP11 coprocessors, then save back. */\r
+ orr r1, r1, #( 0xf << 20 )\r
+ str r1, [r0]\r
+ bx r14\r
+\r
+\r
+\r
+ END\r
+\r
projects / freertos / blobdiff