[2/3] powerpc/spufs: clear purge status before setting up isolated mode

Submitted by Jeremy Kerr on Feb. 17, 2009, 12:44 a.m.

Details

Message ID 1234831454.359466.897667422107.2.gpush@pingu
State Accepted
Headers show

Commit Message

Jeremy Kerr Feb. 17, 2009, 12:44 a.m.
Currently, we may setup the MFC for isolated mode initilaisation with
the purge still active. This means that DMAs required to perform the
init do not happen.

This change clears the purge status after doing the purge, so that
the isolated init can proceed.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

---
 arch/powerpc/platforms/cell/spufs/run.c |    3 +++
 1 file changed, 3 insertions(+)

Comments

Arnd Bergmann Feb. 19, 2009, 3:48 p.m.
On Tuesday 17 February 2009, Jeremy Kerr wrote:
> Currently, we may setup the MFC for isolated mode initilaisation with
> the purge still active. This means that DMAs required to perform the
> init do not happen.
> 
> This change clears the purge status after doing the purge, so that
> the isolated init can proceed.
> 
> Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
> 

Acked-by: Arnd Bergmann <arnd@arndb.de>

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diff --git a/arch/powerpc/platforms/cell/spufs/run.c b/arch/powerpc/platforms/cell/spufs/run.c
index c58bd36..4ddf769 100644
--- a/arch/powerpc/platforms/cell/spufs/run.c
+++ b/arch/powerpc/platforms/cell/spufs/run.c
@@ -117,6 +117,9 @@  static int spu_setup_isolated(struct spu_context *ctx)
 		cond_resched();
 	}
 
+	/* clear purge status */
+	out_be64(mfc_cntl, 0);
+
 	/* put the SPE in kernel mode to allow access to the loader */
 	sr1 = spu_mfc_sr1_get(ctx->spu);
 	sr1 &= ~MFC_STATE1_PROBLEM_STATE_MASK;