Tegra: smmu: add a hook to get number of devices

This patch adds a hook to get the number of smmu devices and
removes the NUM_SMMU_DEVICES macro.

Change-Id: Ia8dba7e9304224976b5da688b9e4b5438f11cc41
Signed-off-by: Steven Kao <skao@nvidia.com>

plat/nvidia/tegra/common/drivers/smmu/smmu.c

@@ -137,8 +137,10 @@ void tegra_smmu_save_context(uint64_t smmu_ctx_addr)
 void tegra_smmu_init(void)
 {
 	uint32_t val, cb_idx, smmu_id, ctx_base;
+	uint32_t smmu_counter = plat_get_num_smmu_devices();
+
+	for (smmu_id = 0UL; smmu_id < smmu_counter; smmu_id++) {
 
-	for (smmu_id = 0; smmu_id < NUM_SMMU_DEVICES; smmu_id++) {
 		/* Program the SMMU pagesize and reset CACHE_LOCK bit */
 		val = tegra_smmu_read_32(smmu_id, SMMU_GSR0_SECURE_ACR);
 		val |= SMMU_GSR0_PGSIZE_64K;

plat/nvidia/tegra/include/drivers/smmu.h

@@ -705,5 +705,6 @@ typedef struct smmu_regs {
 void tegra_smmu_init(void);
 void tegra_smmu_save_context(uint64_t smmu_ctx_addr);
 smmu_regs_t *plat_get_smmu_ctx(void);
+uint32_t plat_get_num_smmu_devices(void);
 
 #endif /* SMMU_H */

plat/nvidia/tegra/soc/t186/plat_smmu.c

@@ -9,6 +9,8 @@
 #include <smmu.h>
 #include <tegra_def.h>
 
+#define MAX_NUM_SMMU_DEVICES	U(1)
+
 /*******************************************************************************
  * Array to hold SMMU context for Tegra186
  ******************************************************************************/
@@ -309,3 +311,11 @@ smmu_regs_t *plat_get_smmu_ctx(void)
 
 	return tegra186_smmu_context;
 }
+
+/*******************************************************************************
+ * Handler to return the support SMMU devices number
+ ******************************************************************************/
+uint32_t plat_get_num_smmu_devices(void)
+{
+	return MAX_NUM_SMMU_DEVICES;
+}

plat/nvidia/tegra/soc/t186/platform_t186.mk

@@ -20,9 +20,6 @@ $(eval $(call add_define,ENABLE_CHIP_VERIFICATION_HARNESS))
 ENABLE_SMMU_DEVICE			:= 1
 $(eval $(call add_define,ENABLE_SMMU_DEVICE))
 
-NUM_SMMU_DEVICES			:= 1
-$(eval $(call add_define,NUM_SMMU_DEVICES))
-
 RESET_TO_BL31				:= 1
 
 PROGRAMMABLE_RESET_ADDRESS		:= 1