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    Subject[PATCH 15/22] spufs: Add runcntrl read accessors
    From: Jeremy Kerr <jeremy@au1.ibm.com>
    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>

    ---

    arch/powerpc/platforms/cell/spufs/backing_ops.c | 6 ++++++
    arch/powerpc/platforms/cell/spufs/hw_ops.c | 6 ++++++
    arch/powerpc/platforms/cell/spufs/spufs.h | 1 +
    3 files changed, 13 insertions(+)

    Index: linux-2.6/arch/powerpc/platforms/cell/spufs/backing_ops.c
    ===================================================================
    --- linux-2.6.orig/arch/powerpc/platforms/cell/spufs/backing_ops.c
    +++ linux-2.6/arch/powerpc/platforms/cell/spufs/backing_ops.c
    @@ -268,6 +268,11 @@ static char *spu_backing_get_ls(struct s
    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,
    Index: linux-2.6/arch/powerpc/platforms/cell/spufs/hw_ops.c
    ===================================================================
    --- linux-2.6.orig/arch/powerpc/platforms/cell/spufs/hw_ops.c
    +++ linux-2.6/arch/powerpc/platforms/cell/spufs/hw_ops.c
    @@ -207,6 +207,11 @@ static char *spu_hw_get_ls(struct spu_co
    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,
    Index: linux-2.6/arch/powerpc/platforms/cell/spufs/spufs.h
    ===================================================================
    --- linux-2.6.orig/arch/powerpc/platforms/cell/spufs/spufs.h
    +++ linux-2.6/arch/powerpc/platforms/cell/spufs/spufs.h
    @@ -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);
    --

    -
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