Merge pull request #570 from davwan01/bl31-in-dram

Add support to load BL31 in DRAM

docs/user-guide.md

@@ -498,6 +498,12 @@ map is explained in the [Firmware Design].
     that wish to optimise memory usage for page tables need to set this flag to 1
     and must override the related macros.
 
+*   'ARM_BL31_IN_DRAM': Boolean option to select loading of BL31 in TZC secured
+    DRAM. By default, BL31 is in the secure SRAM. Set this flag to 1 to load
+    BL31 in TZC secured DRAM. If TSP is present, then setting this option also
+    sets the TSP location to DRAM and ignores the `ARM_TSP_RAM_LOCATION` build
+    flag.
+
 #### ARM CSS platform specific build options
 
 *   `CSS_DETECT_PRE_1_7_0_SCP`: Boolean flag to detect SCP version

include/plat/arm/board/common/board_arm_def.h

@@ -75,10 +75,10 @@
  */
 #if IMAGE_BL31 || IMAGE_BL32
 # define PLAT_ARM_MMAP_ENTRIES		6
-# define MAX_XLAT_TABLES		3
-#else
-# define PLAT_ARM_MMAP_ENTRIES		9
 # define MAX_XLAT_TABLES		4
+#else
+# define PLAT_ARM_MMAP_ENTRIES		10
+# define MAX_XLAT_TABLES		5
 #endif
 
 #endif /* ARM_BOARD_OPTIMISE_MMAP */

include/plat/arm/common/arm_def.h

@@ -165,6 +165,12 @@
 						TSP_SEC_MEM_SIZE,	\
 						MT_MEMORY | MT_RW | MT_SECURE)
 
+#if ARM_BL31_IN_DRAM
+#define ARM_MAP_BL31_SEC_DRAM		MAP_REGION_FLAT(		\
+						BL31_BASE,		\
+						PLAT_ARM_MAX_BL31_SIZE,	\
+						MT_MEMORY | MT_RW | MT_SECURE)
+#endif
 
 /*
  * The number of regions like RO(code), coherent and data required by
@@ -240,15 +246,32 @@
 /*******************************************************************************
  * BL2 specific defines.
  ******************************************************************************/
+#if ARM_BL31_IN_DRAM
+/*
+ * BL31 is loaded in the DRAM.
+ * Put BL2 just below BL1.
+ */
+#define BL2_BASE			(BL1_RW_BASE - PLAT_ARM_MAX_BL2_SIZE)
+#define BL2_LIMIT			BL1_RW_BASE
+#else
 /*
  * Put BL2 just below BL31.
  */
 #define BL2_BASE			(BL31_BASE - PLAT_ARM_MAX_BL2_SIZE)
 #define BL2_LIMIT			BL31_BASE
+#endif
 
 /*******************************************************************************
  * BL31 specific defines.
  ******************************************************************************/
+#if ARM_BL31_IN_DRAM
+/*
+ * Put BL31 at the bottom of TZC secured DRAM
+ */
+#define BL31_BASE			ARM_AP_TZC_DRAM1_BASE
+#define BL31_LIMIT			(ARM_AP_TZC_DRAM1_BASE +	\
+						PLAT_ARM_MAX_BL31_SIZE)
+#else
 /*
  * Put BL31 at the top of the Trusted SRAM.
  */
@@ -257,6 +280,7 @@
 						PLAT_ARM_MAX_BL31_SIZE)
 #define BL31_PROGBITS_LIMIT		BL1_RW_BASE
 #define BL31_LIMIT			(ARM_BL_RAM_BASE + ARM_BL_RAM_SIZE)
+#endif
 
 /*******************************************************************************
  * BL32 specific defines.
@@ -266,7 +290,16 @@
  * Trusted DRAM (if available) or the DRAM region secured by the TrustZone
  * controller.
  */
-#if ARM_TSP_RAM_LOCATION_ID == ARM_TRUSTED_SRAM_ID
+#if ARM_BL31_IN_DRAM
+# define TSP_SEC_MEM_BASE		(ARM_AP_TZC_DRAM1_BASE +	\
+						PLAT_ARM_MAX_BL31_SIZE)
+# define TSP_SEC_MEM_SIZE		(ARM_AP_TZC_DRAM1_SIZE -	\
+						PLAT_ARM_MAX_BL31_SIZE)
+# define BL32_BASE			(ARM_AP_TZC_DRAM1_BASE +	\
+						PLAT_ARM_MAX_BL31_SIZE)
+# define BL32_LIMIT			(ARM_AP_TZC_DRAM1_BASE +	\
+						ARM_AP_TZC_DRAM1_SIZE)
+#elif ARM_TSP_RAM_LOCATION_ID == ARM_TRUSTED_SRAM_ID
 # define TSP_SEC_MEM_BASE		ARM_BL_RAM_BASE
 # define TSP_SEC_MEM_SIZE		ARM_BL_RAM_SIZE
 # define TSP_PROGBITS_LIMIT		BL2_BASE
@@ -292,7 +325,11 @@
  * FWU Images: NS_BL1U, BL2U & NS_BL2U defines.
  ******************************************************************************/
 #define BL2U_BASE			BL2_BASE
+#if ARM_BL31_IN_DRAM
+#define BL2U_LIMIT			BL1_RW_BASE
+#else
 #define BL2U_LIMIT			BL31_BASE
+#endif
 #define NS_BL2U_BASE			ARM_NS_DRAM1_BASE
 #define NS_BL1U_BASE			(PLAT_ARM_NVM_BASE + 0x03EB8000)
 

plat/arm/board/fvp/aarch64/fvp_common.c

@@ -97,6 +97,9 @@ const mmap_region_t plat_arm_mmap[] = {
 	MAP_DEVICE2,
 	ARM_MAP_NS_DRAM1,
 	ARM_MAP_TSP_SEC_MEM,
+#if ARM_BL31_IN_DRAM
+	ARM_MAP_BL31_SEC_DRAM,
+#endif
 	{0}
 };
 #endif

plat/arm/board/fvp/include/platform_def.h

@@ -146,11 +146,7 @@
  * PLAT_ARM_MAX_BL1_RW_SIZE is calculated using the current BL1 RW debug size
  * plus a little space for growth.
  */
-#if TRUSTED_BOARD_BOOT
+#define PLAT_ARM_MAX_BL1_RW_SIZE	0xA000
-# define PLAT_ARM_MAX_BL1_RW_SIZE	0x9000
-#else
-# define PLAT_ARM_MAX_BL1_RW_SIZE	0x6000
-#endif
 
 /*
  * PLAT_ARM_MAX_BL2_SIZE is calculated using the current BL2 debug size plus a

plat/arm/common/arm_bl2_setup.c

@@ -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:
@@ -96,11 +96,27 @@ static bl2_to_bl31_params_mem_t bl31_params_mem;
 #pragma weak bl2_plat_get_bl33_meminfo
 #pragma weak bl2_plat_set_bl33_ep_info
 
+#if ARM_BL31_IN_DRAM
+meminfo_t *bl2_plat_sec_mem_layout(void)
+{
+	static meminfo_t bl2_dram_layout
+		__aligned(CACHE_WRITEBACK_GRANULE) = {
+		.total_base = BL31_BASE,
+		.total_size = (ARM_AP_TZC_DRAM1_BASE +
+				ARM_AP_TZC_DRAM1_SIZE) - BL31_BASE,
+		.free_base = BL31_BASE,
+		.free_size = (ARM_AP_TZC_DRAM1_BASE +
+				ARM_AP_TZC_DRAM1_SIZE) - BL31_BASE
+	};
 
+	return &bl2_dram_layout;
+}
+#else
 meminfo_t *bl2_plat_sec_mem_layout(void)
 {
 	return &bl2_tzram_layout;
 }
+#endif
 
 /*******************************************************************************
  * This function assigns a pointer to the memory that the platform has kept

plat/arm/common/arm_common.mk

@@ -77,6 +77,11 @@ ARM_CONFIG_CNTACR		:=	1
 $(eval $(call assert_boolean,ARM_CONFIG_CNTACR))
 $(eval $(call add_define,ARM_CONFIG_CNTACR))
 
+# Process ARM_BL31_IN_DRAM flag
+ARM_BL31_IN_DRAM		:=	0
+$(eval $(call assert_boolean,ARM_BL31_IN_DRAM))
+$(eval $(call add_define,ARM_BL31_IN_DRAM))
+
 PLAT_INCLUDES		+=	-Iinclude/common/tbbr				\
 				-Iinclude/plat/arm/common			\
 				-Iinclude/plat/arm/common/aarch64