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-rw-r--r--lib/fconf/fconf.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/lib/fconf/fconf.c b/lib/fconf/fconf.c
new file mode 100644
index 0000000000..a6da56b00d
--- /dev/null
+++ b/lib/fconf/fconf.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2019-2020, ARM Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include <common/debug.h>
+#include <common/fdt_wrappers.h>
+#include <lib/fconf/fconf.h>
+#include <libfdt.h>
+#include <plat/common/platform.h>
+#include <platform_def.h>
+
+struct fconf_dtb_info_t fconf_dtb_info;
+
+void fconf_load_config(void)
+{
+ int err;
+ /* fconf FW_CONFIG and TB_FW_CONFIG are currently the same DTB */
+ image_info_t arm_tb_fw_info = {
+ .h.type = (uint8_t)PARAM_IMAGE_BINARY,
+ .h.version = (uint8_t)VERSION_2,
+ .h.size = (uint16_t)sizeof(image_info_t),
+ .h.attr = 0,
+ .image_base = ARM_TB_FW_CONFIG_BASE,
+ .image_max_size = (uint32_t)
+ (ARM_TB_FW_CONFIG_LIMIT - ARM_TB_FW_CONFIG_BASE)
+ };
+
+ VERBOSE("FCONF: Loading FW_CONFIG\n");
+ err = load_auth_image(TB_FW_CONFIG_ID, &arm_tb_fw_info);
+ if (err != 0) {
+ /* Return if FW_CONFIG is not loaded */
+ VERBOSE("Failed to load FW_CONFIG\n");
+ return;
+ }
+
+ /* At this point we know that a DTB is indeed available */
+ fconf_dtb_info.base_addr = arm_tb_fw_info.image_base;
+ fconf_dtb_info.size = (size_t)arm_tb_fw_info.image_size;
+
+#if !BL2_AT_EL3
+ image_desc_t *desc;
+
+ /* The BL2 ep_info arg0 is modified to point to FW_CONFIG */
+ desc = bl1_plat_get_image_desc(BL2_IMAGE_ID);
+ assert(desc != NULL);
+ desc->ep_info.args.arg0 = arm_tb_fw_info.image_base;
+#endif
+
+ INFO("FCONF: FW_CONFIG loaded at address = 0x%lx\n", arm_tb_fw_info.image_base);
+}
+
+void fconf_populate(uintptr_t config)
+{
+ assert(config != 0UL);
+
+ /* Check if the pointer to DTB is correct */
+ if (fdt_check_header((void *)config) != 0) {
+ ERROR("FCONF: Invalid DTB file passed for FW_CONFIG\n");
+ panic();
+ }
+
+ INFO("FCONF: Reading firmware configuration file from: 0x%lx\n", config);
+
+ /* Go through all registered populate functions */
+ IMPORT_SYM(struct fconf_populator *, __FCONF_POPULATOR_START__, start);
+ IMPORT_SYM(struct fconf_populator *, __FCONF_POPULATOR_END__, end);
+ const struct fconf_populator *populator;
+
+ for (populator = start; populator != end; populator++) {
+ assert((populator->info != NULL) && (populator->populate != NULL));
+
+ INFO("FCONF: Reading firmware configuration information for: %s\n", populator->info);
+ if (populator->populate(config) != 0) {
+ /* TODO: handle property miss */
+ panic();
+ }
+ }
+
+ /* save local pointer to the config dtb */
+ fconf_dtb_info.base_addr = config;
+}