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Alfred Gedeon 2020-07-01 22:27:40 -07:00 • committed by alfred gedeon
parent a5dbc2b1de
commit 718178c68a
406 changed files with 108795 additions and 106323 deletions
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124
portable/oWatcom/16BitDOS/common/portasm.h
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@ -28,10 +28,10 @@ typedef void TCB_t;
extern volatile TCB_t * volatile pxCurrentTCB;
extern void vTaskSwitchContext( void );
/*
* Saves the stack pointer for one task into its TCB, calls
* vTaskSwitchContext() to update the TCB being used, then restores the stack
* from the new TCB read to run the task.
/*
* Saves the stack pointer for one task into its TCB, calls
* vTaskSwitchContext() to update the TCB being used, then restores the stack
* from the new TCB read to run the task.
*/
void portSWITCH_CONTEXT( void );
@ -43,67 +43,65 @@ void portSWITCH_CONTEXT( void );
void portFIRST_CONTEXT( void );
/* There are slightly different versions depending on whether you are building
to include debugger information. If debugger information is used then there
are a couple of extra bytes left of the ISR stack (presumably for use by the
debugger). The true stack pointer is then stored in the bp register. We add
2 to the stack pointer to remove the extra bytes before we restore our context. */
* to include debugger information. If debugger information is used then there
* are a couple of extra bytes left of the ISR stack (presumably for use by the
* debugger). The true stack pointer is then stored in the bp register. We add
* 2 to the stack pointer to remove the extra bytes before we restore our context. */
#ifdef DEBUG_BUILD
#pragma aux portSWITCH_CONTEXT = "mov ax, seg pxCurrentTCB" \
"mov ds, ax" \
"les bx, pxCurrentTCB" /* Save the stack pointer into the TCB. */ \
"mov es:0x2[ bx ], ss" \
"mov es:[ bx ], sp" \
"call vTaskSwitchContext" /* Perform the switch. */ \
"mov ax, seg pxCurrentTCB" /* Restore the stack pointer from the TCB. */ \
"mov ds, ax" \
"les bx, dword ptr pxCurrentTCB" \
"mov ss, es:[ bx + 2 ]" \
"mov sp, es:[ bx ]" \
"mov bp, sp" /* Prepair the bp register for the restoration of the SP in the compiler generated portion of the ISR */ \
"add bp, 0x0002"
#pragma aux portFIRST_CONTEXT = "mov ax, seg pxCurrentTCB" \
"mov ds, ax" \
"les bx, dword ptr pxCurrentTCB" \
"mov ss, es:[ bx + 2 ]" \
"mov sp, es:[ bx ]" \
"add sp, 0x0002" /* Remove the extra bytes that exist in debug builds before restoring the context. */ \
"pop ax" \
"pop ax" \
"pop es" \
"pop ds" \
"popa" \
"iret"
#else
#pragma aux portSWITCH_CONTEXT = "mov ax, seg pxCurrentTCB" \
"mov ds, ax" \
"les bx, pxCurrentTCB" /* Save the stack pointer into the TCB. */ \
"mov es:0x2[ bx ], ss" \
"mov es:[ bx ], sp" \
"call vTaskSwitchContext" /* Perform the switch. */ \
"mov ax, seg pxCurrentTCB" /* Restore the stack pointer from the TCB. */ \
"mov ds, ax" \
"les bx, dword ptr pxCurrentTCB" \
"mov ss, es:[ bx + 2 ]" \
"mov sp, es:[ bx ]"
#pragma aux portFIRST_CONTEXT = "mov ax, seg pxCurrentTCB" \
"mov ds, ax" \
"les bx, dword ptr pxCurrentTCB" \
"mov ss, es:[ bx + 2 ]" \
"mov sp, es:[ bx ]" \
"pop ax" \
"pop ax" \
"pop es" \
"pop ds" \
"popa" \
"iret"
#endif
#pragma aux portSWITCH_CONTEXT = "mov ax, seg pxCurrentTCB" \
"mov ds, ax" \
"les bx, pxCurrentTCB" /* Save the stack pointer into the TCB. */ \
"mov es:0x2[ bx ], ss" \
"mov es:[ bx ], sp" \
"call vTaskSwitchContext" /* Perform the switch. */ \
"mov ax, seg pxCurrentTCB" /* Restore the stack pointer from the TCB. */ \
"mov ds, ax" \
"les bx, dword ptr pxCurrentTCB" \
"mov ss, es:[ bx + 2 ]" \
"mov sp, es:[ bx ]" \
"mov bp, sp" /* Prepair the bp register for the restoration of the SP in the compiler generated portion of the ISR */\
"add bp, 0x0002"
#pragma aux portFIRST_CONTEXT = "mov ax, seg pxCurrentTCB" \
"mov ds, ax" \
"les bx, dword ptr pxCurrentTCB" \
"mov ss, es:[ bx + 2 ]" \
"mov sp, es:[ bx ]" \
"add sp, 0x0002" /* Remove the extra bytes that exist in debug builds before restoring the context. */\
"pop ax" \
"pop ax" \
"pop es" \
"pop ds" \
"popa" \
"iret"
#else /* ifdef DEBUG_BUILD */
#pragma aux portSWITCH_CONTEXT = "mov ax, seg pxCurrentTCB" \
"mov ds, ax" \
"les bx, pxCurrentTCB" /* Save the stack pointer into the TCB. */\
"mov es:0x2[ bx ], ss" \
"mov es:[ bx ], sp" \
"call vTaskSwitchContext" /* Perform the switch. */ \
"mov ax, seg pxCurrentTCB" /* Restore the stack pointer from the TCB. */\
"mov ds, ax" \
"les bx, dword ptr pxCurrentTCB" \
"mov ss, es:[ bx + 2 ]" \
"mov sp, es:[ bx ]"
#pragma aux portFIRST_CONTEXT = "mov ax, seg pxCurrentTCB"\
"mov ds, ax" \
"les bx, dword ptr pxCurrentTCB" \
"mov ss, es:[ bx + 2 ]" \
"mov sp, es:[ bx ]" \
"pop ax" \
"pop ax" \
"pop es" \
"pop ds" \
"popa" \
"iret"
#endif /* ifdef DEBUG_BUILD */