Tegra: memctrl_v2: secure the on-chip TZSRAM memory
This patch programs the Memory controller's control registers
to disable non-secure accesses to the TZRAM. In case these
registers are already programmed by the BL2/BL30, then the
driver just bails out.
Change-Id: Ia1416988050e3d067296373060c717a260499122
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/plat/nvidia/tegra/include/drivers/memctrl_v2.h b/plat/nvidia/tegra/include/drivers/memctrl_v2.h
index 1d5ba0e..0736b59 100644
--- a/plat/nvidia/tegra/include/drivers/memctrl_v2.h
+++ b/plat/nvidia/tegra/include/drivers/memctrl_v2.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@@ -264,6 +264,17 @@
#define MC_VIDEO_PROTECT_BASE_LO 0x648
#define MC_VIDEO_PROTECT_SIZE_MB 0x64c
+/*******************************************************************************
+ * TZRAM carveout configuration registers
+ ******************************************************************************/
+#define MC_TZRAM_BASE 0x1850
+#define MC_TZRAM_END 0x1854
+#define MC_TZRAM_HI_ADDR_BITS 0x1588
+ #define TZRAM_ADDR_HI_BITS_MASK 0x3
+ #define TZRAM_END_HI_BITS_SHIFT 8
+#define MC_TZRAM_REG_CTRL 0x185c
+ #define DISABLE_TZRAM_ACCESS 1
+
static inline uint32_t tegra_mc_read_32(uint32_t off)
{
return mmio_read_32(TEGRA_MC_BASE + off);