48 lines
984 B
PHP
48 lines
984 B
PHP
.macro portSAVE_CONTEXT
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; Save r0 to r14 and pr.
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movml.l r15, @-r15
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; Save mac1, mach and gbr
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sts.l macl, @-r15
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sts.l mach, @-r15
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stc.l gbr, @-r15
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; Get the address of pxCurrentTCB
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mov.l #_pxCurrentTCB, r0
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; Get the address of pxTopOfStack from the TCB.
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mov.l @r0, r0
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; Save the stack pointer in pxTopOfStack.
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mov.l r15, @r0
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.endm
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;-----------------------------------------------------------
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.macro portRESTORE_CONTEXT
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; Get the address of the pxCurrentTCB variable.
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mov.l #_pxCurrentTCB, r0
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; Get the address of the task stack from pxCurrentTCB.
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mov.l @r0, r0
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; Get the task stack itself into the stack pointer.
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mov.l @r0, r15
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; Restore system registers.
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ldc.l @r15+, gbr
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lds.l @r15+, mach
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lds.l @r15+, macl
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; Restore r0 to r14 and PR
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movml.l @r15+, r15
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; Pop the SR and PC to jump to the start of the task.
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rte
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nop
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.endm
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;----------------------------------------------------------- |