/* FreeRTOS V8.2.1 - Copyright (C) 2015 Real Time Engineers Ltd. All rights reserved VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. This file is part of the FreeRTOS distribution. FreeRTOS is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License (version 2) as published by the Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception. *************************************************************************** >>! NOTE: The modification to the GPL is included to allow you to !<< >>! distribute a combined work that includes FreeRTOS without being !<< >>! obliged to provide the source code for proprietary components !<< >>! outside of the FreeRTOS kernel. !<< *************************************************************************** FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Full license text is available on the following link: http://www.freertos.org/a00114.html *************************************************************************** * * * FreeRTOS provides completely free yet professionally developed, * * robust, strictly quality controlled, supported, and cross * * platform software that is more than just the market leader, it * * is the industry's de facto standard. * * * * Help yourself get started quickly while simultaneously helping * * to support the FreeRTOS project by purchasing a FreeRTOS * * tutorial book, reference manual, or both: * * http://www.FreeRTOS.org/Documentation * * * *************************************************************************** http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading the FAQ page "My application does not run, what could be wrong?". Have you defined configASSERT()? http://www.FreeRTOS.org/support - In return for receiving this top quality embedded software for free we request you assist our global community by participating in the support forum. http://www.FreeRTOS.org/training - Investing in training allows your team to be as productive as possible as early as possible. Now you can receive FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers Ltd, and the world's leading authority on the world's leading RTOS. http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, including FreeRTOS+Trace - an indispensable productivity tool, a DOS compatible FAT file system, and our tiny thread aware UDP/IP stack. http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate. Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS. http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS licenses offer ticketed support, indemnification and commercial middleware. http://www.SafeRTOS.com - High Integrity Systems also provide a safety engineered and independently SIL3 certified version for use in safety and mission critical applications that require provable dependability. 1 tab == 4 spaces! */ /* * The register test task as described in the comments at the top of main-full.c. */ .global vRegTest1Implementation .global vRegTest2Implementation /* Variables that are incremented on each iteration of the reg test tasks - provided the tasks have not reported any errors. The check timer inspects these variables to ensure they are still incrementing as expected. If a variable stops incrementing then it is likely that its associate task has stalled or detected an error. */ .extern ulRegTest1LoopCounter .extern ulRegTest2LoopCounter /*-----------------------------------------------------------*/ .section .text .align 2 vRegTest1Implementation: /* First fill the relevant registers with known values. r0 is always 0, r1 is the stack pointer, and r3 is a read only small data area pointer. */ addi r3, r0, 3 addi r4, r0, 4 addi r5, r0, 5 addi r6, r0, 6 addi r7, r0, 7 addi r8, r0, 8 addi r9, r0, 9 addi r10, r0, 10 addi r11, r0, 11 addi r12, r0, 12 /* R13 = read write small data area anchour. */ /* R14 = return address for interrupt. */ /* R15 = return address for sub-routine. */ /* R16 = return address for trap. */ /* R17 = return address for exceptions. */ /* R18 = reserved for assembler and compiler temporaries. */ addi r19, r0, 19 addi r20, r0, 20 addi r21, r0, 21 addi r22, r0, 22 addi r23, r0, 23 addi r24, r0, 24 addi r25, r0, 25 addi r26, r0, 26 addi r27, r0, 27 addi r28, r0, 28 addi r29, r0, 29 addi r30, r0, 30 addi r31, r0, 31 /* Now test the register values to ensure they contain the same value that was written to them above. This task will get preempted frequently so other tasks are likely to have executed since the register values were written. If any register contains an unexpected value then the task will branch to Error_Loop_1, which in turn prevents it from incrementing its loop counter, enabling the check timer to determine that all is not as it should be. */ Loop_Start_1: xori r18, r3, 3 bnei r18, Error_Loop_1 xori r18, r4, 4 bnei r18, Error_Loop_1 xori r18, r6, 6 bnei r18, Error_Loop_1 xori r18, r7, 7 bnei r18, Error_Loop_1 xori r18, r8, 8 bnei r18, Error_Loop_1 xori r18, r9, 9 bnei r18, Error_Loop_1 xori r18, r10, 10 bnei r18, Error_Loop_1 xori r18, r11, 11 bnei r18, Error_Loop_1 xori r18, r12, 12 bnei r18, Error_Loop_1 xori r18, r19, 19 bnei r18, Error_Loop_1 xori r18, r20, 20 bnei r18, Error_Loop_1 xori r18, r21, 21 bnei r18, Error_Loop_1 xori r18, r22, 22 bnei r18, Error_Loop_1 xori r18, r23, 23 bnei r18, Error_Loop_1 xori r18, r24, 24 bnei r18, Error_Loop_1 xori r18, r25, 25 bnei r18, Error_Loop_1 xori r18, r26, 26 bnei r18, Error_Loop_1 xori r18, r27, 27 bnei r18, Error_Loop_1 xori r18, r28, 28 bnei r18, Error_Loop_1 xori r18, r29, 29 bnei r18, Error_Loop_1 xori r18, r30, 30 bnei r18, Error_Loop_1 xori r18, r31, 31 bnei r18, Error_Loop_1 /* If this task has not branched to the error loop, then everything is ok, and the check variable can be incremented to indicate that this task is still running. Then, brach back to the top to check the register contents again. */ lwi r18, r0, ulRegTest1LoopCounter addik r18, r18, 1 swi r18, r0, ulRegTest1LoopCounter bri Loop_Start_1 /* The test function will branch here if it discovers an error. This part of the code just sits in a NULL loop, which prevents the check variable incrementing any further to allow the check timer to recognize that this test has failed. */ Error_Loop_1: bri 0 nop /*-----------------------------------------------------------*/ .section .text .align 2 vRegTest2Implementation: /* First fill the relevant registers with known values. r0 is always 0, r1 is the stack pointer, and r3 is a read only small data area pointer. */ addi r3, r0, 30000 addi r4, r0, 40000 addi r5, r0, 50000 addi r6, r0, 60000 addi r7, r0, 70000 addi r8, r0, 80000 addi r9, r0, 90000 addi r10, r0, 100000 addi r11, r0, 110000 addi r12, r0, 120000 /* R13 = read write small data area anchour. */ /* R14 = return address for interrupt. */ /* R15 = return address for sub-routine. */ /* R16 = return address for trap. */ /* R17 = return address for exceptions. */ /* R18 = reserved for assembler and compiler temporaries. */ addi r19, r0, 190000 addi r20, r0, 200000 addi r21, r0, 210000 addi r22, r0, 220000 addi r23, r0, 230000 addi r24, r0, 240000 addi r25, r0, 250000 addi r26, r0, 260000 addi r27, r0, 270000 addi r28, r0, 280000 addi r29, r0, 290000 addi r30, r0, 300000 addi r31, r0, 310000 /* Now test the register values to ensure they contain the same value that was written to them above. This task will get preempted frequently so other tasks are likely to have executed since the register values were written. If any register contains an unexpected value then the task will branch to Error_Loop_2, which in turn prevents it from incrementing its loop counter, enabling the check timer to determine that all is not as it should be. */ Loop_Start_2: xori r18, r3, 30000 bnei r18, Error_Loop_2 xori r18, r4, 40000 bnei r18, Error_Loop_2 xori r18, r6, 60000 bnei r18, Error_Loop_2 xori r18, r7, 70000 bnei r18, Error_Loop_2 xori r18, r8, 80000 bnei r18, Error_Loop_2 xori r18, r9, 90000 bnei r18, Error_Loop_2 xori r18, r10, 100000 bnei r18, Error_Loop_2 xori r18, r11, 110000 bnei r18, Error_Loop_2 xori r18, r12, 120000 bnei r18, Error_Loop_2 xori r18, r19, 190000 bnei r18, Error_Loop_2 xori r18, r20, 200000 bnei r18, Error_Loop_2 xori r18, r21, 210000 bnei r18, Error_Loop_2 xori r18, r22, 220000 bnei r18, Error_Loop_2 xori r18, r23, 230000 bnei r18, Error_Loop_2 xori r18, r24, 240000 bnei r18, Error_Loop_2 xori r18, r25, 250000 bnei r18, Error_Loop_2 xori r18, r26, 260000 bnei r18, Error_Loop_2 xori r18, r27, 270000 bnei r18, Error_Loop_2 xori r18, r28, 280000 bnei r18, Error_Loop_2 xori r18, r29, 290000 bnei r18, Error_Loop_2 xori r18, r30, 300000 bnei r18, Error_Loop_2 xori r18, r31, 310000 bnei r18, Error_Loop_2 /* If this task has not branched to the error loop, then everything is ok, and the check variable can be incremented to indicate that this task is still running. Then, brach back to the top to check the register contents again. */ lwi r18, r0, ulRegTest2LoopCounter addik r18, r18, 1 swi r18, r0, ulRegTest2LoopCounter bri Loop_Start_2 /* The test function will branch here if it discovers an error. This part of the code just sits in a NULL loop, which prevents the check variable incrementing any further to allow the check timer to recognize that this test has failed. */ Error_Loop_2: bri 0 nop