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/*
* Context switch for the Reneas M32C
*
*
*/
#define ARG_EXECUTING 8
#define ARG_HEIR 12
#define CTXT_SP 0
#define CTXT_FB 4
.file "context_switch.S"
.text
.global __CPU_Context_switch
.type __CPU_Context_switch, @function
__CPU_Context_switch:
enter #0
pushm a0,a1,r0,r1,r2,r3
pushc flg
pushc sb
mov.l ARG_EXECUTING[fb],a0 ; a0 = executing
stc fb,a1
mov.l a1,CTXT_FB[a0] ; save fb
stc sp,a1
mov.l a1,CTXT_SP[a0] ; save sp
mov.l ARG_HEIR[fb],a0 ; a0 = heir
restore:
mov.l CTXT_SP[a0],a1
ldc a1,sp ; restore sp
mov.l CTXT_FB[a0],a1
ldc a1,fb ; restore fb
popc sb
popc flg
popm a0,a1,r0,r1,r2,r3
exitd
.size __CPU_Context_switch, .-__CPU_Context_switch
#define ARG_RESTART 8
.global __CPU_Context_Restart_self
.type __CPU_Context_Restart_self, @function
__CPU_Context_Restart_self:
enter #0
mov.l ARG_RESTART[fb],a0 ; a0 = heir
jmp.s restore
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