mem_protect: Add DRAM2 to the list of mem protected ranges

On ARM platforms, the maximum size of the address space is limited
to 32-bits as defined in arm_def.h. In order to access DRAM2, which
is defined beyond the 32-bit address space, the maximum address space
is increased to 36-bits in AArch64. It is possible to increase the
virtual space for AArch32, but it is more difficult and not supported
for now.

NOTE - the actual maximum memory address space is platform dependent
and is checked at run-time by querying the PARange field in the
ID_AA64MMFR0_EL1 register.

Change-Id: I6cb05c78a63b1fed96db9a9773faca04a5b93d67
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>

5 files changed, 27 insertions, 3 deletions

diff --git a/include/plat/arm/common/arm_def.h b/include/plat/arm/common/arm_def.h
index 787ccb02..dbf102b8 100644
--- a/include/plat/arm/common/arm_def.h
+++ b/include/plat/arm/common/arm_def.h
@@ -177,7 +177,12 @@
 						ARM_NS_DRAM1_SIZE,	\
 						MT_MEMORY | MT_RW | MT_NS)
 
+#define ARM_MAP_DRAM2			MAP_REGION_FLAT(		\
+						ARM_DRAM2_BASE,		\
+						ARM_DRAM2_SIZE,		\
+						MT_MEMORY | MT_RW | MT_NS)
 #ifdef SPD_tspd
+
 #define ARM_MAP_TSP_SEC_MEM		MAP_REGION_FLAT(		\
 						TSP_SEC_MEM_BASE,	\
 						TSP_SEC_MEM_SIZE,	\
@@ -224,8 +229,18 @@
  * Required platform porting definitions common to all ARM standard platforms
  *****************************************************************************/
 
+/*
+ * We need to access DRAM2 from BL2 for PSCI_MEM_PROTECT for
+ * AArch64 builds
+ */
+#ifdef AARCH64
+#define PLAT_PHY_ADDR_SPACE_SIZE			(1ull << 36)
+#define PLAT_VIRT_ADDR_SPACE_SIZE			(1ull << 36)
+#else
 #define PLAT_PHY_ADDR_SPACE_SIZE			(1ull << 32)
 #define PLAT_VIRT_ADDR_SPACE_SIZE			(1ull << 32)
+#endif
+
 
 /*
  * This macro defines the deepest retention state possible. A higher state
diff --git a/plat/arm/board/common/board_css_common.c b/plat/arm/board/common/board_css_common.c
index 4638af18..032ebdf7 100644
--- a/plat/arm/board/common/board_css_common.c
+++ b/plat/arm/board/common/board_css_common.c
@@ -36,6 +36,9 @@ const mmap_region_t plat_arm_mmap[] = {
 	CSS_MAP_DEVICE,
 	SOC_CSS_MAP_DEVICE,
 	ARM_MAP_NS_DRAM1,
+#ifdef AARCH64
+	ARM_MAP_DRAM2,
+#endif
 #ifdef SPD_tspd
 	ARM_MAP_TSP_SEC_MEM,
 #endif
diff --git a/plat/arm/board/fvp/fvp_common.c b/plat/arm/board/fvp/fvp_common.c
index bc033130..7015ac04 100644
--- a/plat/arm/board/fvp/fvp_common.c
+++ b/plat/arm/board/fvp/fvp_common.c
@@ -79,6 +79,9 @@ const mmap_region_t plat_arm_mmap[] = {
 	MAP_DEVICE0,
 	MAP_DEVICE1,
 	ARM_MAP_NS_DRAM1,
+#ifdef AARCH64
+	ARM_MAP_DRAM2,
+#endif
 #ifdef SPD_tspd
 	ARM_MAP_TSP_SEC_MEM,
 #endif
diff --git a/plat/arm/board/juno/include/platform_def.h b/plat/arm/board/juno/include/platform_def.h
index e8a4a40a..c739587d 100644
--- a/plat/arm/board/juno/include/platform_def.h
+++ b/plat/arm/board/juno/include/platform_def.h
@@ -68,10 +68,10 @@
 
 #ifdef IMAGE_BL2
 #ifdef SPD_opteed
-# define PLAT_ARM_MMAP_ENTRIES		10
+# define PLAT_ARM_MMAP_ENTRIES		11
 # define MAX_XLAT_TABLES		5
 #else
-# define PLAT_ARM_MMAP_ENTRIES		9
+# define PLAT_ARM_MMAP_ENTRIES		10
 # define MAX_XLAT_TABLES		4
 #endif
 #endif
@@ -82,7 +82,7 @@
 #endif
 
 #ifdef IMAGE_BL31
-#  define PLAT_ARM_MMAP_ENTRIES		6
+#  define PLAT_ARM_MMAP_ENTRIES		7
 #  define MAX_XLAT_TABLES		3
 #endif
 
diff --git a/plat/arm/common/arm_nor_psci_mem_protect.c b/plat/arm/common/arm_nor_psci_mem_protect.c
index 0f16e352..c5263fd8 100644
--- a/plat/arm/common/arm_nor_psci_mem_protect.c
+++ b/plat/arm/common/arm_nor_psci_mem_protect.c
@@ -14,6 +14,9 @@
 
 mem_region_t arm_ram_ranges[] = {
 	{ARM_NS_DRAM1_BASE, ARM_NS_DRAM1_SIZE},
+#ifdef AARCH64
+	{ARM_DRAM2_BASE, ARM_DRAM2_SIZE},
+#endif
 };
 
 /*******************************************************************************