mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
synced 2025-05-19 11:39:04 -04:00
989bc332b2
* Add XMOS XCore ports Some minor modifications are also made to the kernel to support the XCore compiler's automatic stack size calculation. * Update kernel to support SMP The XMOS XCore ports are also updated to support SMP. * Fix compiler warnings in xcore ports The port set and clear interrupt mask from ISR macros were removed from the ports so that the default macros found in FreeRTOS.h are used instead. The default macros do not result in warnings when they are used. * Remove inline function from timers.h Inline function converted to macro. This should now build when optimizations are off and inlining is disabled. * Fix compiler warnings in xcore ports and tasks.c * fixed documentation for ulTaskNotifyTake() and ulTaskNotifyTakeIndexed() * spelling fixes for tasks.c Co-authored-by: Michael Bruno <mikeb@xmos.com>
275 lines
6.7 KiB
ArmAsm
275 lines
6.7 KiB
ArmAsm
/*
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* FreeRTOS Kernel V10.4.3
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* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* https://www.FreeRTOS.org
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* https://github.com/FreeRTOS
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*
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* 1 tab == 4 spaces!
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*/
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.file "portASM.S"
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#include "FreeRTOSConfig.h"
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#include "ISR_Support.h"
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.extern pxCurrentTCB
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.extern vTaskSwitchContext
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.extern vPortCentralInterruptHandler
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.extern xTaskIncrementTick
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.extern vPortAPICErrorHandler
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.extern pucPortTaskFPUContextBuffer
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.extern ulPortYieldPending
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.global vPortStartFirstTask
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.global vPortCentralInterruptWrapper
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.global vPortAPICErrorHandlerWrapper
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.global vPortTimerHandler
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.global vPortYieldCall
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.global vPortAPICSpuriousHandler
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.text
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/*-----------------------------------------------------------*/
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.align 4
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.func vPortYieldCall
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vPortYieldCall:
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/* Save general purpose registers. */
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pusha
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.if configSUPPORT_FPU == 1
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/* If the task has a buffer allocated to save the FPU context then save
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the FPU context now. */
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movl pucPortTaskFPUContextBuffer, %eax
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test %eax, %eax
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je 1f
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fnsave ( %eax )
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fwait
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1:
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/* Save the address of the FPU context, if any. */
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push pucPortTaskFPUContextBuffer
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.endif /* configSUPPORT_FPU */
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/* Find the TCB. */
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movl pxCurrentTCB, %eax
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/* Stack location is first item in the TCB. */
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movl %esp, (%eax)
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call vTaskSwitchContext
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/* Find the location of pxCurrentTCB again - a callee saved register could
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be used in place of eax to prevent this second load, but that then relies
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on the compiler and other asm code. */
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movl pxCurrentTCB, %eax
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movl (%eax), %esp
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.if configSUPPORT_FPU == 1
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/* Restore address of task's FPU context buffer. */
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pop pucPortTaskFPUContextBuffer
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/* If the task has a buffer allocated in which its FPU context is saved,
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then restore it now. */
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movl pucPortTaskFPUContextBuffer, %eax
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test %eax, %eax
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je 1f
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frstor ( %eax )
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1:
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.endif
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popa
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iret
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.endfunc
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/*-----------------------------------------------------------*/
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.align 4
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.func vPortStartFirstTask
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vPortStartFirstTask:
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/* Find the TCB. */
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movl pxCurrentTCB, %eax
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/* Stack location is first item in the TCB. */
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movl (%eax), %esp
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/* Restore FPU context flag. */
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.if configSUPPORT_FPU == 1
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pop pucPortTaskFPUContextBuffer
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.endif /* configSUPPORT_FPU */
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/* Restore general purpose registers. */
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popa
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iret
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.endfunc
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/*-----------------------------------------------------------*/
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.align 4
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.func vPortAPICErrorHandlerWrapper
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vPortAPICErrorHandlerWrapper:
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pusha
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call vPortAPICErrorHandler
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popa
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/* EOI. */
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movl $0x00, (0xFEE000B0)
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iret
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.endfunc
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/*-----------------------------------------------------------*/
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.align 4
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.func vPortTimerHandler
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vPortTimerHandler:
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/* Save general purpose registers. */
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pusha
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/* Interrupts are not nested, so save the rest of the task context. */
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.if configSUPPORT_FPU == 1
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/* If the task has a buffer allocated to save the FPU context then save the
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FPU context now. */
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movl pucPortTaskFPUContextBuffer, %eax
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test %eax, %eax
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je 1f
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fnsave ( %eax ) /* Save FLOP context into ucTempFPUBuffer array. */
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fwait
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1:
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/* Save the address of the FPU context, if any. */
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push pucPortTaskFPUContextBuffer
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.endif /* configSUPPORT_FPU */
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/* Find the TCB. */
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movl pxCurrentTCB, %eax
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/* Stack location is first item in the TCB. */
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movl %esp, (%eax)
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/* Switch stacks. */
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movl ulTopOfSystemStack, %esp
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movl %esp, %ebp
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/* Increment nesting count. */
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add $1, ulInterruptNesting
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call xTaskIncrementTick
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sti
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/* Is a switch to another task required? */
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test %eax, %eax
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je _skip_context_switch
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cli
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call vTaskSwitchContext
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_skip_context_switch:
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cli
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/* Decrement the variable used to determine if a switch to a system
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stack is necessary. */
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sub $1, ulInterruptNesting
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/* Stack location is first item in the TCB. */
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movl pxCurrentTCB, %eax
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movl (%eax), %esp
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.if configSUPPORT_FPU == 1
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/* Restore address of task's FPU context buffer. */
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pop pucPortTaskFPUContextBuffer
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/* If the task has a buffer allocated in which its FPU context is saved,
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then restore it now. */
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movl pucPortTaskFPUContextBuffer, %eax
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test %eax, %eax
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je 1f
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frstor ( %eax )
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1:
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.endif
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popa
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/* EOI. */
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movl $0x00, (0xFEE000B0)
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iret
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.endfunc
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/*-----------------------------------------------------------*/
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.if configUSE_COMMON_INTERRUPT_ENTRY_POINT == 1
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.align 4
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.func vPortCentralInterruptWrapper
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vPortCentralInterruptWrapper:
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portFREERTOS_INTERRUPT_ENTRY
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movl $0xFEE00170, %eax /* Highest In Service Register (ISR) long word. */
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movl $8, %ecx /* Loop counter. */
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next_isr_long_word:
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test %ecx, %ecx /* Loop counter reached 0? */
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je wrapper_epilogue /* Looked at all ISR registers without finding a bit set. */
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sub $1, %ecx /* Sub 1 from loop counter. */
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movl (%eax), %ebx /* Load next ISR long word. */
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sub $0x10, %eax /* Point to next ISR long word in case no bits are set in the current long word. */
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test %ebx, %ebx /* Are there any bits set? */
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je next_isr_long_word /* Look at next ISR long word if no bits were set. */
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sti
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bsr %ebx, %ebx /* A bit was set, which one? */
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movl $32, %eax /* Destination operand for following multiplication. */
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mul %ecx /* Calculate base vector for current register, 32 vectors per register. */
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add %ebx, %eax /* Add bit offset into register to get final vector number. */
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push %eax /* Vector number is function parameter. */
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call vPortCentralInterruptHandler
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pop %eax /* Remove parameter. */
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wrapper_epilogue:
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portFREERTOS_INTERRUPT_EXIT
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.endfunc
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.endif /* configUSE_COMMON_INTERRUPT_ENTRY_POINT */
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/*-----------------------------------------------------------*/
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.align 4
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.func vPortAPISpuriousHandler
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vPortAPICSpuriousHandler:
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iret
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.endfunc
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.end
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