;/*\r
-; FreeRTOS V8.0.0:rc1 - Copyright (C) 2014 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 V10.1.1\r
+; * Copyright (C) 2018 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
INCLUDE portmacro.inc\r
\r
\r
\r
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\r
-; SVC handler is used to start the scheduler and yield a task.\r
+; SVC handler is used to yield a task.\r
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\r
FreeRTOS_SWI_Handler\r
\r
portSAVE_CONTEXT\r
LDR R0, =vTaskSwitchContext\r
BLX R0\r
+ portRESTORE_CONTEXT\r
\r
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\r
+; vPortRestoreTaskContext is used to start the scheduler.\r
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\r
vPortRestoreTaskContext\r
+ ; Switch to system mode\r
+ CPS #SYS_MODE\r
portRESTORE_CONTEXT\r
\r
-\r
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\r
; PL390 GIC interrupt handler\r
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\r
LDR r0, [r2]\r
\r
; Ensure bit 2 of the stack pointer is clear. r2 holds the bit 2 value for\r
- ; future use.\r
+ ; future use. _RB_ Does this ever actually need to be done provided the\r
+ ; start of the stack is 8-byte aligned?\r
MOV r2, sp\r
AND r2, r2, #4\r
SUB sp, sp, r2\r
\r
- ; Call the interrupt handler\r
- PUSH {r0-r3, lr}\r
+ ; Call the interrupt handler. r4 is pushed to maintain alignment.\r
+ PUSH {r0-r4, lr}\r
LDR r1, =vApplicationIRQHandler\r
BLX r1\r
- POP {r0-r3, lr}\r
+ POP {r0-r4, lr}\r
ADD sp, sp, r2\r
\r
CPSID i\r
- \r
+\r
; Write the value read from ICCIAR to ICCEOIR\r
LDR r4, =ulICCEOIR\r
STR r0, [r4]\r