Tegra: memctrl_v2: platform handler for TZDRAM setup

The Tegra memctrl driver sets up the TZDRAM fence during boot and
system suspend exit. This patch provides individual platforms with
handlers to perform custom steps during TZDRAM setup.

Change-Id: Iee094d6ca189c6dd24f1147003c33c99ff3a953b
Signed-off-by: Steven Kao <skao@nvidia.com>

plat/nvidia/tegra/common/drivers/memctrl/memctrl_v2.c

@@ -30,6 +30,7 @@ static uint64_t video_mem_size_mb;
  * provide typical implementations that will be overridden by a SoC.
  */
 #pragma weak plat_memctrl_tzdram_setup
+
 void plat_memctrl_tzdram_setup(uint64_t phys_base, uint64_t size_in_bytes)
 {
 	; /* do nothing */
@@ -154,26 +155,10 @@ void tegra_memctrl_restore_settings(void)
  */
 void tegra_memctrl_tzdram_setup(uint64_t phys_base, uint32_t size_in_bytes)
 {
-	/*
-	 * Setup the Memory controller to allow only secure accesses to
-	 * the TZDRAM carveout
-	 */
-	INFO("Configuring TrustZone DRAM Memory Carveout\n");
-
-	tegra_mc_write_32(MC_SECURITY_CFG0_0, (uint32_t)phys_base);
-	tegra_mc_write_32(MC_SECURITY_CFG3_0, (uint32_t)(phys_base >> 32));
-	tegra_mc_write_32(MC_SECURITY_CFG1_0, size_in_bytes >> 20);
-
 	/*
 	 * Perform platform specific steps.
 	 */
 	plat_memctrl_tzdram_setup(phys_base, size_in_bytes);
-
-	/*
-	 * MCE propagates the security configuration values across the
-	 * CCPLEX.
-	 */
-	mce_update_gsc_tzdram();
 }
 
 /*

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

@@ -7,6 +7,7 @@
 #include <assert.h>
 #include <common/bl_common.h>
 
+#include <mce.h>
 #include <memctrl_v2.h>
 #include <tegra_mc_def.h>
 #include <tegra_platform.h>
@@ -546,8 +547,15 @@ void plat_memctrl_tzdram_setup(uint64_t phys_base, uint64_t size_in_bytes)
 {
 	uint32_t val;
 
-	(void)phys_base;
-	(void)size_in_bytes;
+	/*
+	 * Setup the Memory controller to allow only secure accesses to
+	 * the TZDRAM carveout
+	 */
+	INFO("Configuring TrustZone DRAM Memory Carveout\n");
+
+	tegra_mc_write_32(MC_SECURITY_CFG0_0, (uint32_t)phys_base);
+	tegra_mc_write_32(MC_SECURITY_CFG3_0, (uint32_t)(phys_base >> 32));
+	tegra_mc_write_32(MC_SECURITY_CFG1_0, size_in_bytes >> 20);
 
 	/*
 	 * When TZ encryption is enabled, we need to setup TZDRAM
@@ -565,4 +573,10 @@ void plat_memctrl_tzdram_setup(uint64_t phys_base, uint64_t size_in_bytes)
 
 	val = tegra_mc_read_32(MC_SECURITY_CFG3_0) & MC_SECURITY_BOM_HI_MASK;
 	mmio_write_32(TEGRA_SCRATCH_BASE + SCRATCH_TZDRAM_ADDR_HI, val);
+
+	/*
+	 * MCE propagates the security configuration values across the
+	 * CCPLEX.
+	 */
+	(void)mce_update_gsc_tzdram();
 }