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Tidy up and comment.

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This commit is contained in:
Richard Barry 2009-02-04 16:53:52 +00:00
parent bfd67da1e7
commit c1a2e601a6
3 changed files with 64 additions and 72 deletions
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44
Source/portable/IAR/78K0R/portasm.s26
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@ -41,7 +41,6 @@
; Functions implemented in this file
;------------------------------------------------------------------------------
PUBLIC vPortYield
PUBLIC vPortStart
@ -63,7 +62,9 @@ MD_INTTM05 SYMBOL "MD_INTTM05"
;------------------------------------------------------------------------------
; Port Yield function to check for a Task switch in the cooperative mode
; Yield to another task. Implemented as a software interrupt. The return
; address and PSW will have been saved to the stack automatically before
; this code runs.
;
; Input: NONE
;
@ -75,9 +76,9 @@ MD_INTTM05 SYMBOL "MD_INTTM05"
RSEG CODE:CODE
vPortYield:
portSAVE_CONTEXT ; Save the context of the current task.
call vTaskSwitchContext ; Call the scheduler.
portRESTORE_CONTEXT ; Restore the context of whichever task the ...
RETB
call vTaskSwitchContext ; Call the scheduler to select the next task.
portRESTORE_CONTEXT ; Restore the context of the next task to run.
retb
;------------------------------------------------------------------------------
@ -93,8 +94,8 @@ vPortYield:
RSEG CODE:CODE
vPortStart:
portRESTORE_CONTEXT ; Restore the context of whichever task the ...
; POP PSW ; restore active task PSW
reti ; ... scheduler decided should run.
reti ; An interrupt stack frame is used so the task
; is started using a RETI instruction.
;------------------------------------------------------------------------------
; Perform the necessary steps of the Tick Count Increment and Task Switch
@ -107,42 +108,31 @@ vPortStart:
; Output: NONE
;
;------------------------------------------------------------------------------
#if configUSE_PREEMPTION == 1
MD_INTTM05:
portSAVE_CONTEXT ; Save the context of the current task.
call vTaskIncrementTick ; Call the timer tick function.
call vTaskSwitchContext ; Call the scheduler.
portRESTORE_CONTEXT ; Restore the context of whichever task the ...
RETI
#else
MD_INTTM05:
PUSH AX ; save necessary general purpose register...
PUSH HL ; ...used by the ISR
MOVW AX, CS ; save CS register
PUSH AX
CALL vTaskIncrementTick ; Call the timer tick function.
POP AX
MOVW CS, AX ; restore CS register
POP HL ; restore used general purpose registers
POP AX
RETI
#if configUSE_PREEMPTION == 1
call vTaskSwitchContext ; Call the scheduler to select the next task.
#endif
portRESTORE_CONTEXT ; Restore the context of the next task to run.
reti
REQUIRE ?CL78K0R_V2_L00
COMMON INTVEC:CODE:ROOT(1) ; set ISR location to the Interrupt vector table
COMMON INTVEC:CODE:ROOT(1) ; Set ISR location to the Interrupt vector table.
ORG 68
`??MD_INTTM05??INTVEC 68`:
DW MD_INTTM05
COMMON INTVEC:CODE:ROOT(1) ; set ISR location to the Interrupt vector table
COMMON INTVEC:CODE:ROOT(1) ; Set ISR location to the Interrupt vector table.
ORG 126
`??vPortYield??INTVEC 126`:
DW vPortYield
; set value for the usCriticalNesting
; Set value for the usCriticalNesting.
RSEG NEAR_ID:CONST:SORT:NOROOT(1)
`?<Initializer for usCriticalNesting>`:
DW 10