/*\r
- FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.\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
- ***************************************************************************\r
- * *\r
- * Having a problem? Start by reading the FAQ "My application does *\r
- * not run, what could be wrong? *\r
- * *\r
- * http://www.FreeRTOS.org/FAQHelp.html *\r
- * *\r
- ***************************************************************************\r
-\r
- \r
- http://www.FreeRTOS.org - Documentation, training, latest information, \r
- license and contact details.\r
- \r
- http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,\r
- including FreeRTOS+Trace - an indispensable productivity tool.\r
-\r
- Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell \r
- the code with commercial support, indemnification, and middleware, under \r
- the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also\r
- provide a safety engineered and independently SIL3 certified version under \r
- the SafeRTOS brand: http://www.SafeRTOS.com.\r
-*/\r
+ * FreeRTOS Kernel V10.1.0\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 <FreeRTOSConfig.h>\r
\r
-/* For backward compatibility, ensure configKERNEL_INTERRUPT_PRIORITY is\r
-defined. The value zero should also ensure backward compatibility.\r
-FreeRTOS.org versions prior to V4.3.0 did not include this definition. */\r
-#ifndef configKERNEL_INTERRUPT_PRIORITY\r
- #define configKERNEL_INTERRUPT_PRIORITY 0\r
-#endif\r
-\r
- \r
RSEG CODE:CODE(2)\r
thumb\r
\r
- EXTERN vPortYieldFromISR\r
EXTERN pxCurrentTCB\r
EXTERN vTaskSwitchContext\r
\r
- PUBLIC vSetMSP\r
PUBLIC xPortPendSVHandler\r
- PUBLIC vPortSetInterruptMask\r
- PUBLIC vPortClearInterruptMask\r
PUBLIC vPortSVCHandler\r
PUBLIC vPortStartFirstTask\r
\r
\r
-/*-----------------------------------------------------------*/\r
\r
-vSetMSP\r
- msr msp, r0\r
- bx lr\r
- \r
/*-----------------------------------------------------------*/\r
\r
xPortPendSVHandler:\r
- mrs r0, psp \r
+ mrs r0, psp\r
+ isb\r
ldr r3, =pxCurrentTCB /* Get the location of the current TCB. */\r
- ldr r2, [r3] \r
+ ldr r2, [r3]\r
\r
stmdb r0!, {r4-r11} /* Save the remaining registers. */\r
str r0, [r2] /* Save the new top of stack into the first member of the TCB. */\r
stmdb sp!, {r3, r14}\r
mov r0, #configMAX_SYSCALL_INTERRUPT_PRIORITY\r
msr basepri, r0\r
- bl vTaskSwitchContext \r
+ dsb\r
+ isb\r
+ bl vTaskSwitchContext\r
mov r0, #0\r
msr basepri, r0\r
ldmia sp!, {r3, r14}\r
\r
- ldr r1, [r3] \r
+ ldr r1, [r3]\r
ldr r0, [r1] /* The first item in pxCurrentTCB is the task top of stack. */\r
ldmia r0!, {r4-r11} /* Pop the registers. */\r
- msr psp, r0 \r
- bx r14 \r
-\r
-\r
-/*-----------------------------------------------------------*/\r
-\r
-vPortSetInterruptMask:\r
- push { r0 }\r
- mov R0, #configMAX_SYSCALL_INTERRUPT_PRIORITY\r
- msr BASEPRI, R0\r
- pop { R0 }\r
-\r
+ msr psp, r0\r
+ isb\r
bx r14\r
- \r
-/*-----------------------------------------------------------*/\r
-\r
-vPortClearInterruptMask:\r
- PUSH { r0 }\r
- MOV R0, #0\r
- MSR BASEPRI, R0\r
- POP { R0 }\r
\r
- bx r14\r
\r
/*-----------------------------------------------------------*/\r
\r
-vPortSVCHandler;\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}\r
msr psp, r0\r
+ isb\r
mov r0, #0\r
msr basepri, r0\r
orr r14, r14, #13\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
+ /* Call SVC to start the first task, ensuring interrupts are enabled. */\r
cpsie i\r
+ cpsie f\r
+ dsb\r
+ isb\r
svc 0\r
\r
END\r
-
\ No newline at end of file
projects / freertos / blobdiff