diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2005-12-05 22:52:25 -0500 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-01-09 14:52:55 +1100 |
| commit | 5110459f181ef1f11200bb3dec61953f08cc49e7 (patch) | |
| tree | 73356ce50b3fb5055b4a6f39f237f046615f797d /arch/powerpc/platforms/cell/spufs/backing_ops.c | |
| parent | 3b3d22cb84a0bb12f6bbb2b1158972894bec3f21 (diff) | |
| download | op-kernel-dev-5110459f181ef1f11200bb3dec61953f08cc49e7.zip op-kernel-dev-5110459f181ef1f11200bb3dec61953f08cc49e7.tar.gz | |
[PATCH] spufs: Improved SPU preemptability.
This patch makes it easier to preempt an SPU context by
having the scheduler hold ctx->state_sema for much shorter
periods of time.
As part of this restructuring, the control logic for the "run"
operation is moved from arch/ppc64/kernel/spu_base.c to
fs/spufs/file.c. Of course the base retains "bottom half"
handlers for class{0,1} irqs. The new run loop will re-acquire
an SPU if preempted.
From: Mark Nutter <mnutter@us.ibm.com>
Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/spufs/backing_ops.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/spufs/backing_ops.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/backing_ops.c b/arch/powerpc/platforms/cell/spufs/backing_ops.c index caf0984..66567c1 100644 --- a/arch/powerpc/platforms/cell/spufs/backing_ops.c +++ b/arch/powerpc/platforms/cell/spufs/backing_ops.c @@ -232,6 +232,23 @@ static char *spu_backing_get_ls(struct spu_context *ctx) return ctx->csa.lscsa->ls; } +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_RUNNING; + } else { + ctx->csa.prob.spu_status_R &= ~SPU_STATUS_RUNNING; + } + spin_unlock(&ctx->csa.register_lock); +} + +static void spu_backing_runcntl_stop(struct spu_context *ctx) +{ + spu_backing_runcntl_write(ctx, SPU_RUNCNTL_STOP); +} + struct spu_context_ops spu_backing_ops = { .mbox_read = spu_backing_mbox_read, .mbox_stat_read = spu_backing_mbox_stat_read, @@ -249,4 +266,6 @@ struct spu_context_ops spu_backing_ops = { .npc_write = spu_backing_npc_write, .status_read = spu_backing_status_read, .get_ls = spu_backing_get_ls, + .runcntl_write = spu_backing_runcntl_write, + .runcntl_stop = spu_backing_runcntl_stop, }; |
