diff options
| -rw-r--r-- | drivers/iommu/omap-iommu.c | 2 | ||||
| -rw-r--r-- | drivers/iommu/omap-iommu.h | 5 | ||||
| -rw-r--r-- | drivers/iommu/omap-iommu2.c | 3 |
3 files changed, 10 insertions, 0 deletions
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c index eb73ef2b6fa9..28bc63143279 100644 --- a/drivers/iommu/omap-iommu.c +++ b/drivers/iommu/omap-iommu.c @@ -961,6 +961,8 @@ static int omap_iommu_probe(struct platform_device *pdev) */ obj->da_start = 0; obj->da_end = 0xfffff000; + if (of_find_property(of, "ti,iommu-bus-err-back", NULL)) + obj->has_bus_err_back = MMU_GP_REG_BUS_ERR_BACK_EN; } else { obj->nr_tlb_entries = pdata->nr_tlb_entries; obj->name = pdata->name; diff --git a/drivers/iommu/omap-iommu.h b/drivers/iommu/omap-iommu.h index 120084206602..ea920c3e94ff 100644 --- a/drivers/iommu/omap-iommu.h +++ b/drivers/iommu/omap-iommu.h @@ -52,6 +52,8 @@ struct omap_iommu { void *ctx; /* iommu context: registres saved area */ u32 da_start; u32 da_end; + + int has_bus_err_back; }; struct cr_regs { @@ -130,6 +132,7 @@ static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev) #define MMU_READ_CAM 0x68 #define MMU_READ_RAM 0x6c #define MMU_EMU_FAULT_AD 0x70 +#define MMU_GP_REG 0x88 #define MMU_REG_SIZE 256 @@ -163,6 +166,8 @@ static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev) #define MMU_RAM_MIXED_MASK (1 << MMU_RAM_MIXED_SHIFT) #define MMU_RAM_MIXED MMU_RAM_MIXED_MASK +#define MMU_GP_REG_BUS_ERR_BACK_EN 0x1 + /* * utilities for super page(16MB, 1MB, 64KB and 4KB) */ diff --git a/drivers/iommu/omap-iommu2.c b/drivers/iommu/omap-iommu2.c index d745094a69dd..5e1ea3b0bf16 100644 --- a/drivers/iommu/omap-iommu2.c +++ b/drivers/iommu/omap-iommu2.c @@ -98,6 +98,9 @@ static int omap2_iommu_enable(struct omap_iommu *obj) iommu_write_reg(obj, pa, MMU_TTB); + if (obj->has_bus_err_back) + iommu_write_reg(obj, MMU_GP_REG_BUS_ERR_BACK_EN, MMU_GP_REG); + __iommu_set_twl(obj, true); return 0; |