Tegra: smmu: export handlers to read/write SMMU registers
This patch exports the SMMU register read/write handlers for platforms.
Change-Id: If92f0d3ce820e4997c090b48be7614407bb582da
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/plat/nvidia/tegra/include/drivers/smmu.h b/plat/nvidia/tegra/include/drivers/smmu.h
index 417208e..601864f 100644
--- a/plat/nvidia/tegra/include/drivers/smmu.h
+++ b/plat/nvidia/tegra/include/drivers/smmu.h
@@ -23,13 +23,68 @@
#define SMMU_GSR0_PGSIZE_SHIFT 16U
#define SMMU_GSR0_PGSIZE_4K (0U << SMMU_GSR0_PGSIZE_SHIFT)
#define SMMU_GSR0_PGSIZE_64K (1U << SMMU_GSR0_PGSIZE_SHIFT)
-#define SMMU_ACR_CACHE_LOCK_ENABLE_BIT (1U << 26)
+#define SMMU_ACR_CACHE_LOCK_ENABLE_BIT (1ULL << 26U)
+#define SMMU_GSR0_PER (0x20200U)
/*******************************************************************************
* SMMU Global Aux. Control Register
******************************************************************************/
#define SMMU_CBn_ACTLR_CPRE_BIT (1ULL << 1U)
+/* SMMU IDs currently supported by the driver */
+enum {
+ TEGRA_SMMU0 = 0U,
+ TEGRA_SMMU1 = 1U,
+ TEGRA_SMMU2 = 2U
+};
+
+static inline uint32_t tegra_smmu_read_32(uint32_t smmu_id, uint32_t off)
+{
+ uint32_t ret = 0U;
+
+#if defined(TEGRA_SMMU0_BASE)
+ if (smmu_id == TEGRA_SMMU0) {
+ ret = mmio_read_32(TEGRA_SMMU0_BASE + (uint64_t)off);
+ }
+#endif
+
+#if defined(TEGRA_SMMU1_BASE)
+ if (smmu_id == TEGRA_SMMU1) {
+ ret = mmio_read_32(TEGRA_SMMU1_BASE + (uint64_t)off);
+ }
+#endif
+
+#if defined(TEGRA_SMMU2_BASE)
+ if (smmu_id == TEGRA_SMMU2) {
+ ret = mmio_read_32(TEGRA_SMMU2_BASE + (uint64_t)off);
+ }
+#endif
+
+ return ret;
+}
+
+static inline void tegra_smmu_write_32(uint32_t smmu_id,
+ uint32_t off, uint32_t val)
+{
+#if defined(TEGRA_SMMU0_BASE)
+ if (smmu_id == TEGRA_SMMU0) {
+ mmio_write_32(TEGRA_SMMU0_BASE + (uint64_t)off, val);
+ }
+#endif
+
+#if defined(TEGRA_SMMU1_BASE)
+ if (smmu_id == TEGRA_SMMU1) {
+ mmio_write_32(TEGRA_SMMU1_BASE + (uint64_t)off, val);
+ }
+#endif
+
+#if defined(TEGRA_SMMU2_BASE)
+ if (smmu_id == TEGRA_SMMU2) {
+ mmio_write_32(TEGRA_SMMU2_BASE + (uint64_t)off, val);
+ }
+#endif
+}
+
void tegra_smmu_init(void);
uint32_t plat_get_num_smmu_devices(void);