diff options
author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-09 10:03:44 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-09 10:03:44 -0800 |
commit | 6150c32589d1976ca8a5c987df951088c05a7542 (patch) | |
tree | 94073696576323ff966e365d8c47b8ecd8372f97 /arch/powerpc/platforms/cell/spufs/run.c | |
parent | 44637a12f80b80157d9c1bc5b7d6ef09c9e05713 (diff) | |
parent | be42d5fa3772241b8ecebd443f1fb36247959c54 (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-merge
Diffstat (limited to 'arch/powerpc/platforms/cell/spufs/run.c')
-rw-r--r-- | arch/powerpc/platforms/cell/spufs/run.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/run.c b/arch/powerpc/platforms/cell/spufs/run.c new file mode 100644 index 00000000000..18ea8866c61 --- /dev/null +++ b/arch/powerpc/platforms/cell/spufs/run.c @@ -0,0 +1,131 @@ +#include <linux/wait.h> +#include <linux/ptrace.h> + +#include <asm/spu.h> + +#include "spufs.h" + +/* interrupt-level stop callback function. */ +void spufs_stop_callback(struct spu *spu) +{ + struct spu_context *ctx = spu->ctx; + + wake_up_all(&ctx->stop_wq); +} + +static inline int spu_stopped(struct spu_context *ctx, u32 * stat) +{ + struct spu *spu; + u64 pte_fault; + + *stat = ctx->ops->status_read(ctx); + if (ctx->state != SPU_STATE_RUNNABLE) + return 1; + spu = ctx->spu; + pte_fault = spu->dsisr & + (MFC_DSISR_PTE_NOT_FOUND | MFC_DSISR_ACCESS_DENIED); + return (!(*stat & 0x1) || pte_fault || spu->class_0_pending) ? 1 : 0; +} + +static inline int spu_run_init(struct spu_context *ctx, u32 * npc, + u32 * status) +{ + int ret; + + if ((ret = spu_acquire_runnable(ctx)) != 0) + return ret; + ctx->ops->npc_write(ctx, *npc); + ctx->ops->runcntl_write(ctx, SPU_RUNCNTL_RUNNABLE); + return 0; +} + +static inline int spu_run_fini(struct spu_context *ctx, u32 * npc, + u32 * status) +{ + int ret = 0; + + *status = ctx->ops->status_read(ctx); + *npc = ctx->ops->npc_read(ctx); + spu_release(ctx); + + if (signal_pending(current)) + ret = -ERESTARTSYS; + if (unlikely(current->ptrace & PT_PTRACED)) { + if ((*status & SPU_STATUS_STOPPED_BY_STOP) + && (*status >> SPU_STOP_STATUS_SHIFT) == 0x3fff) { + force_sig(SIGTRAP, current); + ret = -ERESTARTSYS; + } + } + return ret; +} + +static inline int spu_reacquire_runnable(struct spu_context *ctx, u32 *npc, + u32 *status) +{ + int ret; + + if ((ret = spu_run_fini(ctx, npc, status)) != 0) + return ret; + if (*status & (SPU_STATUS_STOPPED_BY_STOP | + SPU_STATUS_STOPPED_BY_HALT)) { + return *status; + } + if ((ret = spu_run_init(ctx, npc, status)) != 0) + return ret; + return 0; +} + +static inline int spu_process_events(struct spu_context *ctx) +{ + struct spu *spu = ctx->spu; + u64 pte_fault = MFC_DSISR_PTE_NOT_FOUND | MFC_DSISR_ACCESS_DENIED; + int ret = 0; + + if (spu->dsisr & pte_fault) + ret = spu_irq_class_1_bottom(spu); + if (spu->class_0_pending) + ret = spu_irq_class_0_bottom(spu); + if (!ret && signal_pending(current)) + ret = -ERESTARTSYS; + return ret; +} + +long spufs_run_spu(struct file *file, struct spu_context *ctx, + u32 * npc, u32 * status) +{ + int ret; + + if (down_interruptible(&ctx->run_sema)) + return -ERESTARTSYS; + + ret = spu_run_init(ctx, npc, status); + if (ret) + goto out; + + do { + ret = spufs_wait(ctx->stop_wq, spu_stopped(ctx, status)); + if (unlikely(ret)) + break; + if (unlikely(ctx->state != SPU_STATE_RUNNABLE)) { + ret = spu_reacquire_runnable(ctx, npc, status); + if (ret) + goto out; + continue; + } + ret = spu_process_events(ctx); + + } while (!ret && !(*status & (SPU_STATUS_STOPPED_BY_STOP | + SPU_STATUS_STOPPED_BY_HALT))); + + ctx->ops->runcntl_stop(ctx); + ret = spu_run_fini(ctx, npc, status); + if (!ret) + ret = *status; + spu_yield(ctx); + +out: + up(&ctx->run_sema); + return ret; +} + |