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authorKazunori Asayama <asayama@sm.sony.co.jp>2007-06-29 10:58:09 +1000
committerPaul Mackerras <paulus@samba.org>2007-07-03 15:24:47 +1000
commit8d038e0433e3164e460c2daeca1ec6947a08f81a (patch)
tree577aa1a6aedfe1a16a01352ab25b07bfcac94514 /arch/powerpc/platforms/cell
parent933b0e35247ef0dbd1a078a0ba3705ddbbda129f (diff)
[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>
Diffstat (limited to 'arch/powerpc/platforms/cell')
-rw-r--r--arch/powerpc/platforms/cell/spufs/backing_ops.c6
-rw-r--r--arch/powerpc/platforms/cell/spufs/switch.c14
2 files changed, 20 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/backing_ops.c b/arch/powerpc/platforms/cell/spufs/backing_ops.c
index d32db9ffc6e..07a0e815abf 100644
--- a/arch/powerpc/platforms/cell/spufs/backing_ops.c
+++ b/arch/powerpc/platforms/cell/spufs/backing_ops.c
@@ -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);
diff --git a/arch/powerpc/platforms/cell/spufs/switch.c b/arch/powerpc/platforms/cell/spufs/switch.c
index 881485847ac..9c506ba08cd 100644
--- a/arch/powerpc/platforms/cell/spufs/switch.c
+++ b/arch/powerpc/platforms/cell/spufs/switch.c
@@ -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. */