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>
diff --git a/plat/arm/common/arm_dyn_cfg.c b/plat/arm/common/arm_dyn_cfg.c
new file mode 100644
index 0000000..4325764
--- /dev/null
+++ b/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 */