/*\r
- FreeRTOS V8.2.2 - Copyright (C) 2015 Real Time Engineers Ltd.\r
- All rights reserved\r
-\r
-\r
- ***************************************************************************\r
- * *\r
- * FreeRTOS tutorial books are available in pdf and paperback. *\r
- * Complete, revised, and edited pdf reference manuals are also *\r
- * available. *\r
- * *\r
- * Purchasing FreeRTOS documentation will not only help you, by *\r
- * ensuring you get running as quickly as possible and with an *\r
- * in-depth knowledge of how to use FreeRTOS, it will also help *\r
- * the FreeRTOS project to continue with its mission of providing *\r
- * professional grade, cross platform, de facto standard solutions *\r
- * for microcontrollers - completely free of charge! *\r
- * *\r
- * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *\r
- * *\r
- * Thank you for using FreeRTOS, and thank you for your support! *\r
- * *\r
- ***************************************************************************\r
-\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
- >>>NOTE<<< The modification to the GPL is included to allow you to\r
- distribute a combined work that includes FreeRTOS without being obliged to\r
- provide the source code for proprietary components outside of the FreeRTOS\r
- kernel. FreeRTOS is distributed in the hope that it will be useful, but\r
- WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY\r
- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for\r
- more details. You should have received a copy of the GNU General Public\r
- License and the FreeRTOS license exception along with FreeRTOS; if not it\r
- can be viewed here: http://www.freertos.org/a00114.html and also obtained\r
- by writing to Richard Barry, contact details for whom are available on the\r
- FreeRTOS WEB site.\r
-\r
- 1 tab == 4 spaces!\r
-\r
- http://www.FreeRTOS.org - Documentation, latest information, license and\r
- contact details.\r
-\r
- http://www.SafeRTOS.com - A version that is certified for use in safety\r
- critical systems.\r
-\r
- http://www.OpenRTOS.com - Commercial support, development, porting,\r
- licensing and training services.\r
-*/\r
+ * FreeRTOS Kernel V10.2.0\r
+ * Copyright (C) 2019 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
.text\r
.arm\r
.extern ulPortInterruptNesting\r
.extern ulPortTaskHasFPUContext\r
.extern ulICCEOIR\r
+ .extern ulPortYieldRequired\r
\r
.global FreeRTOS_IRQ_Handler\r
.global FreeRTOS_SVC_Handler\r
.global vPortRestoreTaskContext\r
\r
\r
-\r
-\r
.macro portSAVE_CONTEXT\r
\r
/* Save the LR and SPSR onto the system mode stack before switching to\r
\r
\r
/******************************************************************************\r
- * SVC handler is used to start the scheduler.\r
+ * SVC handler is used to yield.\r
*****************************************************************************/\r
.align 4\r
.type FreeRTOS_SVC_Handler, %function\r
PUSH {lr}\r
\r
/* Change to supervisor mode to allow reentry. */\r
- CPS #SVC_MODE\r
+ CPS #0x13\r
\r
/* Push used registers. */\r
- PUSH {r0-r4, r12}\r
+ PUSH {r0-r3, r12}\r
\r
/* Increment nesting count. r3 holds the address of ulPortInterruptNesting\r
for future use. r1 holds the original ulPortInterruptNesting value for\r
future use. */\r
LDR r3, ulPortInterruptNestingConst\r
LDR r1, [r3]\r
- ADD r4, r1, #1\r
- STR r4, [r3]\r
+ ADD r0, r1, #1\r
+ STR r0, [r3]\r
\r
/* Ensure bit 2 of the stack pointer is clear. r2 holds the bit 2 value for\r
future use. */\r
- MOV r2, sp\r
- AND r2, r2, #4\r
+ MOV r0, sp\r
+ AND r2, r0, #4\r
SUB sp, sp, r2\r
\r
/* Call the interrupt handler. */\r
ISB\r
\r
/* Write to the EOI register. */\r
- LDR r4, ulICCEOIRConst\r
- LDR r4, [r4]\r
- STR r0, [r4]\r
+ LDR r0, ulICCEOIRConst\r
+ LDR r2, [r0]\r
+ STR r0, [r2]\r
\r
/* Restore the old nesting count. */\r
STR r1, [r3]\r
/* Did the interrupt request a context switch? r1 holds the address of\r
ulPortYieldRequired and r0 the value of ulPortYieldRequired for future\r
use. */\r
- LDR r1, =ulPortYieldRequired\r
+ LDR r1, ulPortYieldRequiredConst\r
LDR r0, [r1]\r
CMP r0, #0\r
BNE switch_before_exit\r
exit_without_switch:\r
/* No context switch. Restore used registers, LR_irq and SPSR before\r
returning. */\r
- POP {r0-r4, r12}\r
+ POP {r0-r3, r12}\r
CPS #IRQ_MODE\r
POP {LR}\r
MSR SPSR_cxsf, LR\r
\r
/* Restore used registers, LR-irq and SPSR before saving the context\r
to the task stack. */\r
- POP {r0-r4, r12}\r
+ POP {r0-r3, r12}\r
CPS #IRQ_MODE\r
POP {LR}\r
MSR SPSR_cxsf, LR\r
vTaskSwitchContextConst: .word vTaskSwitchContext\r
vApplicationIRQHandlerConst: .word vApplicationIRQHandler\r
ulPortInterruptNestingConst: .word ulPortInterruptNesting\r
+ulPortYieldRequiredConst: .word ulPortYieldRequired\r
\r
.end\r
\r
projects / freertos / blobdiff