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[POWERPC] spufs: Save dma_tagstatus_R in CSA 

The function backing_ops->read_mfc_tagstatus() doesn't return a
correct value because the dma_tagstatus_R register isn't saved in
CSA.  This fixes the problem.

Signed-off-by: Kazunori Asayama <asayama@sm.sony.co.jp>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Kazunori Asayama 2007-06-29 10:58:09 +10:00 committed by Paul Mackerras
parent 933b0e3524
commit 8d038e0433
2 changed files with 20 additions and 0 deletions
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6
arch/powerpc/platforms/cell/spufs/backing_ops.c
View File

@ -320,6 +320,12 @@ static int spu_backing_set_mfc_query(struct spu_context * ctx, u32 mask,
/* FIXME: what are the side-effects of this? */
prob->dma_querymask_RW = mask;
prob->dma_querytype_RW = mode;
/* In the current implementation, the SPU context is always
* acquired in runnable state when new bits are added to the
* mask (tagwait), so it's sufficient just to mask
* dma_tagstatus_R with the 'mask' parameter here.
*/
ctx->csa.prob.dma_tagstatus_R &= mask;
out:
spin_unlock(&ctx->csa.register_lock);

14
arch/powerpc/platforms/cell/spufs/switch.c
View File

@ -387,6 +387,19 @@ static inline void save_ppu_querytype(struct spu_state *csa, struct spu *spu)
csa->prob.dma_querytype_RW = in_be32(&prob->dma_querytype_RW);
}
static inline void save_ppu_tagstatus(struct spu_state *csa, struct spu *spu)
{
struct spu_problem __iomem *prob = spu->problem;
/* Save the Prxy_TagStatus register in the CSA.
*
* It is unnecessary to restore dma_tagstatus_R, however,
* dma_tagstatus_R in the CSA is accessed via backing_ops, so
* we must save it.
*/
csa->prob.dma_tagstatus_R = in_be32(&prob->dma_tagstatus_R);
}
static inline void save_mfc_csr_tsq(struct spu_state *csa, struct spu *spu)
{
struct spu_priv2 __iomem *priv2 = spu->priv2;
@ -1812,6 +1825,7 @@ static void save_csa(struct spu_state *prev, struct spu *spu)
save_mfc_queues(prev, spu); /* Step 19. */
save_ppu_querymask(prev, spu); /* Step 20. */
save_ppu_querytype(prev, spu); /* Step 21. */
save_ppu_tagstatus(prev, spu); /* NEW. */
save_mfc_csr_tsq(prev, spu); /* Step 22. */
save_mfc_csr_cmd(prev, spu); /* Step 23. */
save_mfc_csr_ato(prev, spu); /* Step 24. */