| /* | |
| FreeRTOS V9.0.0 - Copyright (C) 2016 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! | |
| */ | |
| .extern ulTopOfSystemStack | |
| .extern ulInterruptNesting | |
| /*-----------------------------------------------------------*/ | |
| .macro portFREERTOS_INTERRUPT_ENTRY | |
| /* Save general purpose registers. */ | |
| pusha | |
| /* If ulInterruptNesting is zero the rest of the task context will need | |
| saving and a stack switch might be required. */ | |
| movl ulInterruptNesting, %eax | |
| test %eax, %eax | |
| jne 2f | |
| /* Interrupts are not nested, so save the rest of the task context. */ | |
| .if configSUPPORT_FPU == 1 | |
| /* If the task has a buffer allocated to save the FPU context then | |
| save the FPU context now. */ | |
| movl pucPortTaskFPUContextBuffer, %eax | |
| test %eax, %eax | |
| je 1f | |
| fnsave ( %eax ) /* Save FLOP context into ucTempFPUBuffer array. */ | |
| fwait | |
| 1: | |
| /* Save the address of the FPU context, if any. */ | |
| push pucPortTaskFPUContextBuffer | |
| .endif /* configSUPPORT_FPU */ | |
| /* Find the TCB. */ | |
| movl pxCurrentTCB, %eax | |
| /* Stack location is first item in the TCB. */ | |
| movl %esp, (%eax) | |
| /* Switch stacks. */ | |
| movl ulTopOfSystemStack, %esp | |
| movl %esp, %ebp | |
| 2: | |
| /* Increment nesting count. */ | |
| add $1, ulInterruptNesting | |
| .endm | |
| /*-----------------------------------------------------------*/ | |
| .macro portINTERRUPT_EPILOGUE | |
| cli | |
| sub $1, ulInterruptNesting | |
| /* If the nesting has unwound to zero. */ | |
| movl ulInterruptNesting, %eax | |
| test %eax, %eax | |
| jne 2f | |
| /* If a yield was requested then select a new TCB now. */ | |
| movl ulPortYieldPending, %eax | |
| test %eax, %eax | |
| je 1f | |
| movl $0, ulPortYieldPending | |
| call vTaskSwitchContext | |
| 1: | |
| /* Stack location is first item in the TCB. */ | |
| movl pxCurrentTCB, %eax | |
| movl (%eax), %esp | |
| .if configSUPPORT_FPU == 1 | |
| /* Restore address of task's FPU context buffer. */ | |
| pop pucPortTaskFPUContextBuffer | |
| /* If the task has a buffer allocated in which its FPU context is saved, | |
| then restore it now. */ | |
| movl pucPortTaskFPUContextBuffer, %eax | |
| test %eax, %eax | |
| je 1f | |
| frstor ( %eax ) | |
| 1: | |
| .endif | |
| 2: | |
| popa | |
| .endm | |
| /*-----------------------------------------------------------*/ | |
| .macro portFREERTOS_INTERRUPT_EXIT | |
| portINTERRUPT_EPILOGUE | |
| /* EOI. */ | |
| movl $0x00, (0xFEE000B0) | |
| iret | |
| .endm |