diff options
Diffstat (limited to 'arch/powerpc/platforms/cell/spu_base.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/spu_base.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c index 525712055bb2..2ec1d38829dd 100644 --- a/arch/powerpc/platforms/cell/spu_base.c +++ b/arch/powerpc/platforms/cell/spu_base.c @@ -34,6 +34,7 @@ #include <linux/linux_logo.h> #include <asm/spu.h> #include <asm/spu_priv1.h> +#include <asm/spu_csa.h> #include <asm/xmon.h> #include <asm/prom.h> @@ -73,6 +74,10 @@ static LIST_HEAD(spu_full_list); static DEFINE_SPINLOCK(spu_full_list_lock); static DEFINE_MUTEX(spu_full_list_mutex); +struct spu_slb { + u64 esid, vsid; +}; + void spu_invalidate_slbs(struct spu *spu) { struct spu_priv2 __iomem *priv2 = spu->priv2; @@ -150,6 +155,18 @@ static void spu_restart_dma(struct spu *spu) out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND); } +static inline void spu_load_slb(struct spu *spu, int slbe, struct spu_slb *slb) +{ + struct spu_priv2 __iomem *priv2 = spu->priv2; + + pr_debug("%s: adding SLB[%d] 0x%016lx 0x%016lx\n", + __func__, slbe, slb->vsid, slb->esid); + + out_be64(&priv2->slb_index_W, slbe); + out_be64(&priv2->slb_vsid_RW, slb->vsid); + out_be64(&priv2->slb_esid_RW, slb->esid); +} + static int __spu_trap_data_seg(struct spu *spu, unsigned long ea) { struct spu_priv2 __iomem *priv2 = spu->priv2; @@ -239,6 +256,38 @@ static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr) return 0; } +static void __spu_kernel_slb(void *addr, struct spu_slb *slb) +{ + unsigned long ea = (unsigned long)addr; + u64 llp; + + if (REGION_ID(ea) == KERNEL_REGION_ID) + llp = mmu_psize_defs[mmu_linear_psize].sllp; + else + llp = mmu_psize_defs[mmu_virtual_psize].sllp; + + slb->vsid = (get_kernel_vsid(ea, MMU_SEGSIZE_256M) << SLB_VSID_SHIFT) | + SLB_VSID_KERNEL | llp; + slb->esid = (ea & ESID_MASK) | SLB_ESID_V; +} + +/** + * Setup the SPU kernel SLBs, in preparation for a context save/restore. We + * need to map both the context save area, and the save/restore code. + */ +void spu_setup_kernel_slbs(struct spu *spu, struct spu_lscsa *lscsa, void *code) +{ + struct spu_slb code_slb, lscsa_slb; + + __spu_kernel_slb(lscsa, &lscsa_slb); + __spu_kernel_slb(code, &code_slb); + + spu_load_slb(spu, 0, &lscsa_slb); + if (lscsa_slb.esid != code_slb.esid) + spu_load_slb(spu, 1, &code_slb); +} +EXPORT_SYMBOL_GPL(spu_setup_kernel_slbs); + static irqreturn_t spu_irq_class_0(int irq, void *data) { |
