diff options
Diffstat (limited to 'drivers/iommu/tegra-smmu.c')
| -rw-r--r-- | drivers/iommu/tegra-smmu.c | 35 |
1 files changed, 18 insertions, 17 deletions
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 2fecbe7..7747283 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -327,36 +327,37 @@ static struct smmu_device *smmu_handle; /* unique for a system */ /* * SMMU register accessors */ -static inline u32 smmu_read(struct smmu_device *smmu, size_t offs) +static bool inline smmu_valid_reg(struct smmu_device *smmu, + void __iomem *addr) { int i; for (i = 0; i < smmu->nregs; i++) { - void __iomem *addr = smmu->regbase + offs; - - BUG_ON(addr < smmu->regs[i]); + if (addr < smmu->regs[i]) + break; if (addr <= smmu->rege[i]) - return readl(addr); + return true; } - BUG(); + return false; } -static inline void smmu_write(struct smmu_device *smmu, u32 val, size_t offs) +static inline u32 smmu_read(struct smmu_device *smmu, size_t offs) { - int i; + void __iomem *addr = smmu->regbase + offs; - for (i = 0; i < smmu->nregs; i++) { - void __iomem *addr = smmu->regbase + offs; + BUG_ON(!smmu_valid_reg(smmu, addr)); - BUG_ON(addr < smmu->regs[i]); - if (addr <= smmu->rege[i]) { - writel(val, addr); - return; - } - } + return readl(addr); +} + +static inline void smmu_write(struct smmu_device *smmu, u32 val, size_t offs) +{ + void __iomem *addr = smmu->regbase + offs; + + BUG_ON(!smmu_valid_reg(smmu, addr)); - BUG(); + writel(val, addr); } #define VA_PAGE_TO_PA(va, page) \ |