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yaml --- r: 17232 b: refs/heads/master c: ce8ab85 h: refs/heads/master v: v3
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Arnd Bergmann
authored and
Paul Mackerras
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Jan 9, 2006
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: 8837d9216f99048636fbb2c11347358e99e06181 | ||
| refs/heads/master: ce8ab8541203f6c7be5b2eeaa97f14f1d8d44e4f |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| #include <linux/wait.h> | ||
| #include <linux/ptrace.h> | ||
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| #include <asm/spu.h> | ||
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| #include "spufs.h" | ||
|
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| /* interrupt-level stop callback function. */ | ||
| void spufs_stop_callback(struct spu *spu) | ||
| { | ||
| struct spu_context *ctx = spu->ctx; | ||
|
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| wake_up_all(&ctx->stop_wq); | ||
| } | ||
|
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| static inline int spu_stopped(struct spu_context *ctx, u32 * stat) | ||
| { | ||
| struct spu *spu; | ||
| u64 pte_fault; | ||
|
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||
| *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; | ||
| } | ||
|
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| static inline int spu_run_init(struct spu_context *ctx, u32 * npc, | ||
| u32 * status) | ||
| { | ||
| int ret; | ||
|
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| 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; | ||
| } | ||
|
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| static inline int spu_run_fini(struct spu_context *ctx, u32 * npc, | ||
| u32 * status) | ||
| { | ||
| int ret = 0; | ||
|
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| *status = ctx->ops->status_read(ctx); | ||
| *npc = ctx->ops->npc_read(ctx); | ||
| spu_release(ctx); | ||
|
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| 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; | ||
| } | ||
|
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| static inline int spu_reacquire_runnable(struct spu_context *ctx, u32 *npc, | ||
| u32 *status) | ||
| { | ||
| int ret; | ||
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| 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; | ||
| } | ||
|
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| 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; | ||
|
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| 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; | ||
| } | ||
|
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| long spufs_run_spu(struct file *file, struct spu_context *ctx, | ||
| u32 * npc, u32 * status) | ||
| { | ||
| int ret; | ||
|
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| if (down_interruptible(&ctx->run_sema)) | ||
| return -ERESTARTSYS; | ||
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| ret = spu_run_init(ctx, npc, status); | ||
| if (ret) | ||
| goto out; | ||
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| 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); | ||
|
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| } while (!ret && !(*status & (SPU_STATUS_STOPPED_BY_STOP | | ||
| SPU_STATUS_STOPPED_BY_HALT))); | ||
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| ctx->ops->runcntl_stop(ctx); | ||
| ret = spu_run_fini(ctx, npc, status); | ||
| if (!ret) | ||
| ret = *status; | ||
| spu_yield(ctx); | ||
|
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||
| out: | ||
| up(&ctx->run_sema); | ||
| return ret; | ||
| } | ||
|
|
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