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https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk
Subversion Repositories openrisc_2011-10-31
[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Source/] [portable/] [IAR/] [AtmelSAM9XE/] [portasm.s79] - Rev 624
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RSEG ICODE:CODE
CODE32
EXTERN vTaskSwitchContext
PUBLIC vPortYieldProcessor
PUBLIC vPortStartFirstTask
#include "ISR_Support.h"
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; Starting the first task is just a matter of restoring the context that
; was created by pxPortInitialiseStack().
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vPortStartFirstTask:
portRESTORE_CONTEXT
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; Manual context switch function. This is the SWI hander.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
vPortYieldProcessor:
ADD LR, LR, #4 ; Add 4 to the LR to make the LR appear exactly
; as if the context was saved during and IRQ
; handler.
portSAVE_CONTEXT ; Save the context of the current task...
LDR R0, =vTaskSwitchContext ; before selecting the next task to execute.
mov lr, pc
BX R0
portRESTORE_CONTEXT ; Restore the context of the selected task.
END
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