ARM platforms: Demonstrate mem_protect from el3_runtime
Previously mem_protect used to be only supported from BL2. This is not
helpful in the case when ARM TF-A BL2 is not used. This patch demonstrates
mem_protect from el3_runtime firmware on ARM Platforms specifically
when RESET_TO_BL31 or RESET_TO_SP_MIN flag is set as BL2 may be absent
in these cases. The Non secure DRAM is dynamically mapped into EL3 mmap
tables temporarily and then the protected regions are then cleared. This
avoids the need to map the non secure DRAM permanently to BL31/sp_min.
The stack size is also increased, because DYNAMIC_XLAT_TABLES require
a bigger stack.
Change-Id: Ia44c594192ed5c5adc596c0cff2c7cc18c001fde
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>
diff --git a/include/plat/arm/board/common/board_arm_def.h b/include/plat/arm/board/common/board_arm_def.h
index 12a21fb..845f140 100644
--- a/include/plat/arm/board/common/board_arm_def.h
+++ b/include/plat/arm/board/common/board_arm_def.h
@@ -30,7 +30,11 @@
#elif defined(IMAGE_BL2U)
# define PLATFORM_STACK_SIZE 0x200
#elif defined(IMAGE_BL31)
+#ifdef PLAT_XLAT_TABLES_DYNAMIC
+# define PLATFORM_STACK_SIZE 0x800
+#else
# define PLATFORM_STACK_SIZE 0x400
+#endif
#elif defined(IMAGE_BL32)
# define PLATFORM_STACK_SIZE 0x440
#endif
@@ -59,11 +63,11 @@
# define PLAT_SP_IMAGE_MMAP_REGIONS 7
# define PLAT_SP_IMAGE_MAX_XLAT_TABLES 10
# else
-# define PLAT_ARM_MMAP_ENTRIES 7
+# define PLAT_ARM_MMAP_ENTRIES 8
# define MAX_XLAT_TABLES 5
# endif
#elif defined(IMAGE_BL32)
-# define PLAT_ARM_MMAP_ENTRIES 7
+# define PLAT_ARM_MMAP_ENTRIES 8
# define MAX_XLAT_TABLES 5
#else
# define PLAT_ARM_MMAP_ENTRIES 11