ARM Platorms: Load TB_FW_CONFIG in BL1

This patch modifies the bl1_platform_setup() API to load and authenticate
TB_FW_CONFIG in BL1. The load address of the same is passed on to BL2 in
`arg0` of entrypoint info. The fvp_io_storage.c and arm_io_storage.c also
adds entries corresponding to TB_FW_CONFIG. A helper function
`arm_load_tb_fw_config()` is added to load and authenticate TB_FW_CONFIG
if present.

Change-Id: Ie7bce667b3fad2b1a083bbcbc0a773f9f04254b1
Signed-off-by: Soby Mathew <soby.mathew@arm.com>

include/plat/arm/common/arm_def.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -306,6 +306,12 @@
  */
 #define CACHE_WRITEBACK_GRANULE		(1 << ARM_CACHE_WRITEBACK_SHIFT)
 
+/*
+ * To enable TB_FW_CONFIG to be loaded by BL1, define the corresponding base
+ * and limit. Leave enough space of BL2 meminfo.
+ */
+#define ARM_TB_FW_CONFIG_BASE		ARM_BL_RAM_BASE + sizeof(meminfo_t)
+#define ARM_TB_FW_CONFIG_LIMIT		BL2_LIMIT
 
 /*******************************************************************************
  * BL1 specific defines.

include/plat/arm/common/plat_arm.h

@@ -178,6 +178,9 @@ void arm_sp_min_plat_runtime_setup(void);
 /* FIP TOC validity check */
 int arm_io_is_toc_valid(void);
 
+/* Utility functions for Dynamic Config */
+void arm_load_tb_fw_config(void);
+
 /*
  * Mandatory functions required in ARM standard platforms
  */

plat/arm/board/fvp/fvp_io_storage.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014-2015, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2014-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -18,6 +18,7 @@
 #define BL31_IMAGE_NAME			"bl31.bin"
 #define BL32_IMAGE_NAME			"bl32.bin"
 #define BL33_IMAGE_NAME			"bl33.bin"
+#define TB_FW_CONFIG_NAME		"fvp_tb_fw_config.dtb"
 
 #if TRUSTED_BOARD_BOOT
 #define TRUSTED_BOOT_FW_CERT_NAME	"tb_fw.crt"
@@ -51,6 +52,10 @@ static const io_file_spec_t sh_file_spec[] = {
 		.path = BL33_IMAGE_NAME,
 		.mode = FOPEN_MODE_RB
 	},
+	[TB_FW_CONFIG_ID] = {
+		.path = TB_FW_CONFIG_NAME,
+		.mode = FOPEN_MODE_RB
+	},
 #if TRUSTED_BOARD_BOOT
 	[TRUSTED_BOOT_FW_CERT_ID] = {
 		.path = TRUSTED_BOOT_FW_CERT_NAME,

plat/arm/common/arm_bl1_setup.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -115,6 +115,9 @@ void arm_bl1_platform_setup(void)
 {
 	/* Initialise the IO layer and register platform IO devices */
 	plat_arm_io_setup();
+#if LOAD_IMAGE_V2
+	arm_load_tb_fw_config();
+#endif
 }
 
 void bl1_platform_setup(void)

plat/arm/common/arm_common.mk

@@ -136,6 +136,7 @@ BL1_SOURCES		+=	drivers/arm/sp805/sp805.c			\
 				drivers/io/io_memmap.c				\
 				drivers/io/io_storage.c				\
 				plat/arm/common/arm_bl1_setup.c			\
+				plat/arm/common/arm_dyn_cfg.c			\
 				plat/arm/common/arm_io_storage.c
 ifdef EL3_PAYLOAD_BASE
 # Need the arm_program_trusted_mailbox() function to release secondary CPUs from

plat/arm/common/arm_dyn_cfg.c

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <debug.h>
+#include <desc_image_load.h>
+#include <platform.h>
+#include <platform_def.h>
+#include <string.h>
+#include <tbbr_img_def.h>
+
+#if LOAD_IMAGE_V2
+
+/*
+ * Helper function to load TB_FW_CONFIG and populate the load information to
+ * arg0 of BL2 entrypoint info.
+ */
+void arm_load_tb_fw_config(void)
+{
+	int err;
+	uintptr_t config_base = 0;
+	image_desc_t *image_desc;
+
+	image_desc_t arm_tb_fw_info = {
+		.image_id = TB_FW_CONFIG_ID,
+		SET_STATIC_PARAM_HEAD(image_info, PARAM_IMAGE_BINARY,
+				VERSION_2, image_info_t, 0),
+		.image_info.image_base = ARM_TB_FW_CONFIG_BASE,
+		.image_info.image_max_size = ARM_TB_FW_CONFIG_LIMIT - ARM_TB_FW_CONFIG_BASE,
+	};
+
+	VERBOSE("BL1: Loading TB_FW_CONFIG\n");
+	err = load_auth_image(TB_FW_CONFIG_ID, &arm_tb_fw_info.image_info);
+	if (err) {
+		/* Return if TB_FW_CONFIG is not loaded */
+		VERBOSE("Failed to load TB_FW_CONFIG\n");
+		return;
+	}
+
+	config_base = arm_tb_fw_info.image_info.image_base;
+
+	/* The BL2 ep_info arg0 is modified to point to TB_FW_CONFIG */
+	image_desc = bl1_plat_get_image_desc(BL2_IMAGE_ID);
+	assert(image_desc);
+	image_desc->ep_info.args.arg0 = config_base;
+
+	INFO("BL1: TB_FW_CONFIG loaded at address = %p\n",
+			(void *) config_base);
+}
+
+#endif /* LOAD_IMAGE_V2 */

plat/arm/common/arm_io_storage.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -53,6 +53,10 @@ static const io_uuid_spec_t bl33_uuid_spec = {
 	.uuid = UUID_NON_TRUSTED_FIRMWARE_BL33,
 };
 
+static const io_uuid_spec_t tb_fw_config_uuid_spec = {
+	.uuid = UUID_TB_FW_CONFIG,
+};
+
 #if TRUSTED_BOARD_BOOT
 static const io_uuid_spec_t tb_fw_cert_uuid_spec = {
 	.uuid = UUID_TRUSTED_BOOT_FW_CERT,
@@ -147,6 +151,11 @@ static const struct plat_io_policy policies[] = {
 		(uintptr_t)&bl33_uuid_spec,
 		open_fip
 	},
+	[TB_FW_CONFIG_ID] = {
+		&fip_dev_handle,
+		(uintptr_t)&tb_fw_config_uuid_spec,
+		open_fip
+	},
 #if TRUSTED_BOARD_BOOT
 	[TRUSTED_BOOT_FW_CERT_ID] = {
 		&fip_dev_handle,