feat(fvp): allocate L0 GPT at the top of SRAM
This patch allocates level 0 GPT at the top of SRAM
for FVP. This helps to meet L0 GPT alignment requirements
and prevent the occurrence of possible unused gaps in SRAM.
Load addresses for FVP TB_FW, SOC_FW and TOS_FW DTBs are
defined in fvp_fw_config.dts via ARM_BL_RAM_BASE macro.
Change-Id: Iaa52e302373779d9fdbaf4e1ba40c10aa8d1f8bd
Signed-off-by: AlexeiFedorov <Alexei.Fedorov@arm.com>
diff --git a/include/plat/arm/common/arm_def.h b/include/plat/arm/common/arm_def.h
index 073c157..e94b32a 100644
--- a/include/plat/arm/common/arm_def.h
+++ b/include/plat/arm/common/arm_def.h
@@ -62,11 +62,22 @@
#define ARM_SHARED_RAM_BASE ARM_TRUSTED_SRAM_BASE
#define ARM_SHARED_RAM_SIZE UL(0x00001000) /* 4 KB */
+#if ENABLE_RME
+/* Store level 0 GPT at the top of the Trusted SRAM */
+#define ARM_L0_GPT_BASE (ARM_TRUSTED_SRAM_BASE + \
+ PLAT_ARM_TRUSTED_SRAM_SIZE - \
+ ARM_L0_GPT_SIZE)
+#define ARM_L0_GPT_SIZE UL(0x00001000) /* 4 KB */
+#else
+#define ARM_L0_GPT_SIZE UL(0)
+#endif
+
/* The remaining Trusted SRAM is used to load the BL images */
-#define ARM_BL_RAM_BASE (ARM_SHARED_RAM_BASE + \
+#define ARM_BL_RAM_BASE (ARM_SHARED_RAM_BASE + \
ARM_SHARED_RAM_SIZE)
-#define ARM_BL_RAM_SIZE (PLAT_ARM_TRUSTED_SRAM_SIZE - \
- ARM_SHARED_RAM_SIZE)
+#define ARM_BL_RAM_SIZE (PLAT_ARM_TRUSTED_SRAM_SIZE - \
+ ARM_SHARED_RAM_SIZE - \
+ ARM_L0_GPT_SIZE)
/*
* The top 16MB (or 64MB if RME is enabled) of DRAM1 is configured as
@@ -355,7 +366,6 @@
ARM_EL3_RMM_SHARED_BASE, \
ARM_EL3_RMM_SHARED_SIZE, \
MT_MEMORY | MT_RW | MT_REALM)
-
#endif /* ENABLE_RME */
/*
@@ -543,18 +553,6 @@
#define ARM_FW_CONFIGS_LIMIT (ARM_BL_RAM_BASE + ARM_FW_CONFIGS_SIZE)
#endif
-#if ENABLE_RME
-/*
- * Store the L0 GPT on Trusted SRAM next to firmware
- * configuration memory, 4KB aligned.
- */
-#define ARM_L0_GPT_SIZE (PAGE_SIZE)
-#define ARM_L0_GPT_BASE (ARM_FW_CONFIGS_LIMIT)
-#define ARM_L0_GPT_LIMIT (ARM_L0_GPT_BASE + ARM_L0_GPT_SIZE)
-#else
-#define ARM_L0_GPT_SIZE U(0)
-#endif
-
/*******************************************************************************
* BL1 specific defines.
* BL1 RW data is relocated from ROM to RAM at runtime so we need 2 sets of
@@ -570,7 +568,8 @@
#endif
/*
- * Put BL1 RW at the top of the Trusted SRAM.
+ * With ENABLE_RME=1 put BL1 RW below L0 GPT,
+ * or at the top of Trusted SRAM otherwise.
*/
#define BL1_RW_BASE (ARM_BL_RAM_BASE + \
ARM_BL_RAM_SIZE - \