Tegra: memctrl_v2: allow CPU accesses to TZRAM

This patch enables CPU access configuration register to allow
accesses to the TZRAM aperture on chips after Tegra186.

Change-Id: I0898582f8bd6fd35360ecf8ca5cee21fe35f7aab
Signed-off-by: Steven Kao <skao@nvidia.com>

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

@@ -199,12 +199,21 @@ void tegra_memctrl_tzram_setup(uint64_t phys_base, uint32_t size_in_bytes)
 	 * Reset the access configuration registers to restrict access
 	 * to the TZRAM aperture
 	 */
-	for (index = MC_TZRAM_CLIENT_ACCESS_CFG0;
+	for (index = MC_TZRAM_CLIENT_ACCESS0_CFG0;
 	     index < ((uint32_t)MC_TZRAM_CARVEOUT_CFG + (uint32_t)MC_GSC_CONFIG_REGS_SIZE);
 	     index += 4U) {
 		tegra_mc_write_32(index, 0);
 	}
 
+	/*
+	 * Enable CPU access configuration registers to access the TZRAM aperture
+	 */
+	if (!tegra_chipid_is_t186()) {
+		val = tegra_mc_read_32(MC_TZRAM_CLIENT_ACCESS1_CFG0);
+		val |= TZRAM_ALLOW_MPCORER | TZRAM_ALLOW_MPCOREW;
+		tegra_mc_write_32(MC_TZRAM_CLIENT_ACCESS1_CFG0, val);
+	}
+
 	/*
 	 * Set the TZRAM base. TZRAM base must be 4k aligned, at least.
 	 */
@@ -232,6 +241,9 @@ void tegra_memctrl_tzram_setup(uint64_t phys_base, uint32_t size_in_bytes)
 	val = tegra_mc_read_32(MC_TZRAM_CARVEOUT_CFG);
 	val &= (uint32_t)~MC_GSC_ENABLE_TZ_LOCK_BIT;
 	val |= MC_GSC_LOCK_CFG_SETTINGS_BIT;
+	if (!tegra_chipid_is_t186()) {
+		val |= MC_GSC_ENABLE_CPU_SECURE_BIT;
+	}
 	tegra_mc_write_32(MC_TZRAM_CARVEOUT_CFG, val);
 
 	/*

plat/nvidia/tegra/include/t186/tegra_def.h

@@ -135,6 +135,7 @@
 #define MC_GSC_BASE_LO_MASK		U(0xFFFFF)
 #define MC_GSC_BASE_HI_SHIFT		U(0)
 #define MC_GSC_BASE_HI_MASK		U(3)
+#define MC_GSC_ENABLE_CPU_SECURE_BIT    (U(1) << 31)
 
 /* TZDRAM carveout configuration registers */
 #define MC_SECURITY_CFG0_0		U(0x70)
@@ -165,7 +166,10 @@
 #define MC_TZRAM_BASE_LO		U(0x2194)
 #define MC_TZRAM_BASE_HI		U(0x2198)
 #define MC_TZRAM_SIZE			U(0x219C)
-#define MC_TZRAM_CLIENT_ACCESS_CFG0	U(0x21A0)
+#define MC_TZRAM_CLIENT_ACCESS0_CFG0	U(0x21A0)
+#define MC_TZRAM_CLIENT_ACCESS1_CFG0	U(0x21A4)
+#define  TZRAM_ALLOW_MPCORER		(U(1) << 7)
+#define  TZRAM_ALLOW_MPCOREW		(U(1) << 25)
 
 /*******************************************************************************
  * Tegra UART Controller constants