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powerpc/spufs: wait for stable spu status in spu_stopped() 

If the spu is stopping (ie, the SPU_STATUS_RUNNING bit is still set),
re-read the register to get the final stopped value.

Signed-off-by: Luke Browning <lukebrowning@us.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
This commit is contained in:
Luke Browning 2008-05-29 17:46:10 -03:00 committed by Jeremy Kerr
parent d563923011
commit d84050f48e
1 changed files with 14 additions and 6 deletions
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20
arch/powerpc/platforms/cell/spufs/run.c
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@ -51,14 +51,22 @@ int spu_stopped(struct spu_context *ctx, u32 *stat)
u64 dsisr;
u32 stopped;
*stat = ctx->ops->status_read(ctx);
if (test_bit(SPU_SCHED_NOTIFY_ACTIVE, &ctx->sched_flags))
return 1;
stopped = SPU_STATUS_INVALID_INSTR | SPU_STATUS_SINGLE_STEP |
SPU_STATUS_STOPPED_BY_HALT | SPU_STATUS_STOPPED_BY_STOP;
if (!(*stat & SPU_STATUS_RUNNING) && (*stat & stopped))
top:
*stat = ctx->ops->status_read(ctx);
if (*stat & stopped) {
/*
* If the spu hasn't finished stopping, we need to
* re-read the register to get the stopped value.
*/
if (*stat & SPU_STATUS_RUNNING)
goto top;
return 1;
}
if (test_bit(SPU_SCHED_NOTIFY_ACTIVE, &ctx->sched_flags))
return 1;
dsisr = ctx->csa.class_0_dsisr;