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[POWERPC] spufs: Add runcntrl read accessors

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This change adds a read accessor for the SPE problem-state run control
register.

This is required for for applying (userspace) changes made to the run
control register while the SPE is stopped - simply asserting the master
run control bit is not sufficient. My next patch for isolated-mode
setup requires this.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Jeremy Kerr 2006-11-20 18:45:09 +01:00 committed by Paul Mackerras
parent ee2d7340cb
commit 3960c26020
3 changed files with 13 additions and 0 deletions
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6
arch/powerpc/platforms/cell/spufs/backing_ops.c
View File

@ -268,6 +268,11 @@ static char *spu_backing_get_ls(struct spu_context *ctx)
return ctx->csa.lscsa->ls;
}
static u32 spu_backing_runcntl_read(struct spu_context *ctx)
{
return ctx->csa.prob.spu_runcntl_RW;
}
static void spu_backing_runcntl_write(struct spu_context *ctx, u32 val)
{
spin_lock(&ctx->csa.register_lock);
@ -363,6 +368,7 @@ 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_read = spu_backing_runcntl_read,
.runcntl_write = spu_backing_runcntl_write,
.master_start = spu_backing_master_start,
.master_stop = spu_backing_master_stop,

6
arch/powerpc/platforms/cell/spufs/hw_ops.c
View File

@ -207,6 +207,11 @@ static char *spu_hw_get_ls(struct spu_context *ctx)
return ctx->spu->local_store;
}
static u32 spu_hw_runcntl_read(struct spu_context *ctx)
{
return in_be32(&ctx->spu->problem->spu_runcntl_RW);
}
static void spu_hw_runcntl_write(struct spu_context *ctx, u32 val)
{
spin_lock_irq(&ctx->spu->register_lock);
@ -307,6 +312,7 @@ struct spu_context_ops spu_hw_ops = {
.npc_write = spu_hw_npc_write,
.status_read = spu_hw_status_read,
.get_ls = spu_hw_get_ls,
.runcntl_read = spu_hw_runcntl_read,
.runcntl_write = spu_hw_runcntl_write,
.master_start = spu_hw_master_start,
.master_stop = spu_hw_master_stop,

1
arch/powerpc/platforms/cell/spufs/spufs.h
View File

@ -115,6 +115,7 @@ struct spu_context_ops {
void (*npc_write) (struct spu_context * ctx, u32 data);
u32(*status_read) (struct spu_context * ctx);
char*(*get_ls) (struct spu_context * ctx);
u32 (*runcntl_read) (struct spu_context * ctx);
void (*runcntl_write) (struct spu_context * ctx, u32 data);
void (*master_start) (struct spu_context * ctx);
void (*master_stop) (struct spu_context * ctx);