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[POWERPC] spufs: Update SPU_Status[CISHP] in backing runcntl write

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Currently, the kernel may fail to restart a SPE context which
has stopped and been swapped out.

This changes spu_backing_runcntl_write to emulate the real
SPU_Status register exactly.  When the SPU Run Control register
is written with SPU_RunCntl[Run] set to '1', the physical SPU
automatically sets SPU_Status[R] and clears SPU_Status[CISHP].

Signed-off-by: Masato Noguchi <Masato.Noguchi@jp.sony.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Masato Noguchi 2008-02-08 15:50:41 +11:00 committed by Paul Mackerras
parent eebead5b8f
commit 732377c5f5
1 changed files with 6 additions and 0 deletions
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6
arch/powerpc/platforms/cell/spufs/backing_ops.c
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@ -288,6 +288,12 @@ static void spu_backing_runcntl_write(struct spu_context *ctx, u32 val)
spin_lock(&ctx->csa.register_lock);
ctx->csa.prob.spu_runcntl_RW = val;
if (val & SPU_RUNCNTL_RUNNABLE) {
ctx->csa.prob.spu_status_R &=
~SPU_STATUS_STOPPED_BY_STOP &
~SPU_STATUS_STOPPED_BY_HALT &
~SPU_STATUS_SINGLE_STEP &
~SPU_STATUS_INVALID_INSTR &
~SPU_STATUS_INVALID_CH;
ctx->csa.prob.spu_status_R |= SPU_STATUS_RUNNING;
} else {
ctx->csa.prob.spu_status_R &= ~SPU_STATUS_RUNNING;