diff options
Diffstat (limited to 'arch/arm/mach-omap2/iommu2.c')
| -rw-r--r-- | arch/arm/mach-omap2/iommu2.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/arch/arm/mach-omap2/iommu2.c b/arch/arm/mach-omap2/iommu2.c index ebbdae262f78..edf7cd4b6553 100644 --- a/arch/arm/mach-omap2/iommu2.c +++ b/arch/arm/mach-omap2/iommu2.c @@ -65,6 +65,26 @@ ((pgsz) == MMU_CAM_PGSZ_64K) ? 0xffff0000 : \ ((pgsz) == MMU_CAM_PGSZ_4K) ? 0xfffff000 : 0) + +static void __iommu_set_twl(struct iommu *obj, bool on) +{ + u32 l = iommu_read_reg(obj, MMU_CNTL); + + if (on) + iommu_write_reg(obj, MMU_IRQ_TWL_MASK, MMU_IRQENABLE); + else + iommu_write_reg(obj, MMU_IRQ_TLB_MISS_MASK, MMU_IRQENABLE); + + l &= ~MMU_CNTL_MASK; + if (on) + l |= (MMU_CNTL_MMU_EN | MMU_CNTL_TWL_EN); + else + l |= (MMU_CNTL_MMU_EN); + + iommu_write_reg(obj, l, MMU_CNTL); +} + + static int omap2_iommu_enable(struct iommu *obj) { u32 l, pa; @@ -100,13 +120,9 @@ static int omap2_iommu_enable(struct iommu *obj) l |= (MMU_SYS_IDLE_SMART | MMU_SYS_AUTOIDLE); iommu_write_reg(obj, l, MMU_SYSCONFIG); - iommu_write_reg(obj, MMU_IRQ_TWL_MASK, MMU_IRQENABLE); iommu_write_reg(obj, pa, MMU_TTB); - l = iommu_read_reg(obj, MMU_CNTL); - l &= ~MMU_CNTL_MASK; - l |= (MMU_CNTL_MMU_EN | MMU_CNTL_TWL_EN); - iommu_write_reg(obj, l, MMU_CNTL); + __iommu_set_twl(obj, true); return 0; } @@ -122,6 +138,11 @@ static void omap2_iommu_disable(struct iommu *obj) dev_dbg(obj->dev, "%s is shutting down\n", obj->name); } +static void omap2_iommu_set_twl(struct iommu *obj, bool on) +{ + __iommu_set_twl(obj, false); +} + static u32 omap2_iommu_fault_isr(struct iommu *obj, u32 *ra) { int i; @@ -304,6 +325,7 @@ static const struct iommu_functions omap2_iommu_ops = { .enable = omap2_iommu_enable, .disable = omap2_iommu_disable, + .set_twl = omap2_iommu_set_twl, .fault_isr = omap2_iommu_fault_isr, .tlb_read_cr = omap2_tlb_read_cr, |