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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Source/] [portable/] [IAR/] [AtmelSAM9XE/] [portasm.s79] - Rev 740

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                RSEG ICODE:CODE
                CODE32

        EXTERN vTaskSwitchContext

        PUBLIC vPortYieldProcessor
        PUBLIC vPortStartFirstTask

#include "ISR_Support.h"

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Starting the first task is just a matter of restoring the context that
; was created by pxPortInitialiseStack().
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
vPortStartFirstTask:
        portRESTORE_CONTEXT

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; 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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