1 files changed, 83 insertions, 0 deletions
diff --git a/plat/nvidia/tegra/soc/t194/plat_memctrl.c b/plat/nvidia/tegra/soc/t194/plat_memctrl.c
new file mode 100644
index 0000000..9ddcacf
--- /dev/null
+++ b/plat/nvidia/tegra/soc/t194/plat_memctrl.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <common/bl_common.h>
+#include <mce.h>
+#include <memctrl_v2.h>
+#include <tegra_platform.h>
+#include <tegra_private.h>
+
+/*******************************************************************************
+ * Array to hold MC context for Tegra194
+ ******************************************************************************/
+static __attribute__((aligned(16))) mc_regs_t tegra194_mc_context[] = {
+	_START_OF_TABLE_,
+	mc_smmu_bypass_cfg,	/* TBU settings */
+	_END_OF_TABLE_,
+};
+
+/*******************************************************************************
+ * Handler to return the pointer to the MC's context struct
+ ******************************************************************************/
+mc_regs_t *plat_memctrl_get_sys_suspend_ctx(void)
+{
+	/* index of _END_OF_TABLE_ */
+	tegra194_mc_context[0].val = (uint32_t)ARRAY_SIZE(tegra194_mc_context) - 1U;
+
+	return tegra194_mc_context;
+}
+
+/*******************************************************************************
+ * Handler to restore platform specific settings to the memory controller
+ ******************************************************************************/
+void plat_memctrl_restore(void)
+{
+	UNUSED_FUNC_NOP(); /* do nothing */
+}
+
+/*******************************************************************************
+ * Handler to program platform specific settings to the memory controller
+ ******************************************************************************/
+void plat_memctrl_setup(void)
+{
+	UNUSED_FUNC_NOP(); /* do nothing */
+}
+
+/*******************************************************************************
+ * Handler to program the scratch registers with TZDRAM settings for the
+ * resume firmware
+ ******************************************************************************/
+void plat_memctrl_tzdram_setup(uint64_t phys_base, uint64_t size_in_bytes)
+{
+	uint32_t sec_reg_ctrl = tegra_mc_read_32(MC_SECURITY_CFG_REG_CTRL_0);
+	uint32_t phys_base_lo = (uint32_t)phys_base & 0xFFF00000;
+	uint32_t phys_base_hi = (uint32_t)(phys_base >> 32);
+
+	/*
+	 * Check TZDRAM carveout register access status. Setup TZDRAM fence
+	 * only if access is enabled.
+	 */
+	if ((sec_reg_ctrl & SECURITY_CFG_WRITE_ACCESS_BIT) ==
+	     SECURITY_CFG_WRITE_ACCESS_ENABLE) {
+
+		/*
+		 * 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, phys_base_lo);
+		tegra_mc_write_32(MC_SECURITY_CFG3_0, phys_base_hi);
+		tegra_mc_write_32(MC_SECURITY_CFG1_0, (uint32_t)(size_in_bytes >> 20));
+
+		/*
+		 * MCE propagates the security configuration values across the
+		 * CCPLEX.
+		 */
+		(void)mce_update_gsc_tzdram();
+	}
+}