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| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2008-10-02 21:32:44 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2008-10-02 21:32:44 +0000 |
| commit | ed6e94718057565c287a28d186d06816b74c65cf (patch) | |
| tree | 7f83b4da2f2d9111ef37b266c892ebcd8373dc20 /cpukit/score/cpu/m32c/context_switch.S | |
| parent | 2008-10-02 Joel Sherrill <joel.sherrill@oarcorp.com> (diff) | |
| download | rtems-ed6e94718057565c287a28d186d06816b74c65cf.tar.bz2 | |
2008-10-02 Joel Sherrill <joel.sherrill@oarcorp.com>
* .cvsignore, ChangeLog, Makefile.am, context_init.c, context_switch.S,
cpu.c, cpu_asm.c, preinstall.am, varvects.S, varvects.h, rtems/asm.h,
rtems/score/cpu.h, rtems/score/cpu_asm.h, rtems/score/m32c.h,
rtems/score/types.h: New files.
Diffstat (limited to 'cpukit/score/cpu/m32c/context_switch.S')
| -rw-r--r-- | cpukit/score/cpu/m32c/context_switch.S | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/cpukit/score/cpu/m32c/context_switch.S b/cpukit/score/cpu/m32c/context_switch.S new file mode 100644 index 0000000000..c430cd6705 --- /dev/null +++ b/cpukit/score/cpu/m32c/context_switch.S @@ -0,0 +1,39 @@ +/* + * 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 + + 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 |