3 files changed, 98 insertions, 2 deletions
diff --git a/lib/fconf/fconf.c b/lib/fconf/fconf.c
index 2ca1bdc77..a6da56b00 100644
--- a/lib/fconf/fconf.c
+++ b/lib/fconf/fconf.c
@@ -18,7 +18,7 @@ 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,
diff --git a/lib/fconf/fconf.mk b/lib/fconf/fconf.mk
index 0813c73cc..703196949 100644
--- a/lib/fconf/fconf.mk
+++ b/lib/fconf/fconf.mk
@@ -5,7 +5,8 @@
 #
 
 # Add Firmware Configuration files
-FCONF_SOURCES		:=	lib/fconf/fconf.c
+FCONF_SOURCES		:=	lib/fconf/fconf.c				\
+				lib/fconf/fconf_dyn_cfg_getter.c
 
 BL1_SOURCES		+=	${FCONF_SOURCES}
 BL2_SOURCES		+=	${FCONF_SOURCES}
diff --git a/lib/fconf/fconf_dyn_cfg_getter.c b/lib/fconf/fconf_dyn_cfg_getter.c
new file mode 100644
index 000000000..d313a5618
--- /dev/null
+++ b/lib/fconf/fconf_dyn_cfg_getter.c
@@ -0,0 +1,95 @@
+/*
+ * 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_dyn_cfg_getter.h>
+#include <lib/object_pool.h>
+#include <libfdt.h>
+
+/* We currently use TB_FW, SOC_FW, TOS_FW, NS_fw and HW configs  */
+#define MAX_DTB_INFO	U(5)
+
+static struct dyn_cfg_dtb_info_t dtb_infos[MAX_DTB_INFO];
+static OBJECT_POOL_ARRAY(dtb_info_pool, dtb_infos);
+
+struct dyn_cfg_dtb_info_t *dyn_cfg_dtb_info_getter(unsigned int config_id)
+{
+	unsigned int index;
+	struct dyn_cfg_dtb_info_t *info;
+
+	/* Positions index to the proper config-id */
+	for (index = 0; index < MAX_DTB_INFO; index++) {
+		if (dtb_infos[index].config_id == config_id) {
+			info = &dtb_infos[index];
+			break;
+		}
+	}
+
+	if (index == MAX_DTB_INFO) {
+		WARN("FCONF: Invalid config id %u\n", config_id);
+		info = NULL;
+	}
+
+	return info;
+}
+
+int fconf_populate_dtb_registry(uintptr_t config)
+{
+	int rc;
+	int node, child;
+	struct dyn_cfg_dtb_info_t *dtb_info;
+
+	/* As libfdt use void *, we can't avoid this cast */
+	const void *dtb = (void *)config;
+
+	/* Find the node offset point to "arm,dyn_cfg-dtb_registry" compatible property */
+	const char *compatible_str = "arm,dyn_cfg-dtb_registry";
+	node = fdt_node_offset_by_compatible(dtb, -1, compatible_str);
+	if (node < 0) {
+		ERROR("FCONF: Can't find %s compatible in dtb\n", compatible_str);
+		return node;
+	}
+
+	fdt_for_each_subnode(child, dtb, node) {
+		dtb_info = pool_alloc(&dtb_info_pool);
+
+		/* Read configuration dtb information */
+		rc = fdtw_read_cells(dtb, child, "load-address", 2, &dtb_info->config_addr);
+		if (rc < 0) {
+			ERROR("FCONF: Incomplete configuration property in dtb-registry.\n");
+			return rc;
+		}
+
+		rc = fdtw_read_cells(dtb, child, "max-size", 1, &dtb_info->config_max_size);
+		if (rc < 0) {
+			ERROR("FCONF: Incomplete configuration property in dtb-registry.\n");
+			return rc;
+		}
+
+		rc = fdtw_read_cells(dtb, child, "id", 1, &dtb_info->config_id);
+		if (rc < 0) {
+			ERROR("FCONF: Incomplete configuration property in dtb-registry.\n");
+			return rc;
+		}
+
+		VERBOSE("FCONF: dyn_cfg.dtb_registry cell found with:\n");
+		VERBOSE("\tload-address = %lx\n", dtb_info->config_addr);
+		VERBOSE("\tmax-size = 0x%zx\n", dtb_info->config_max_size);
+		VERBOSE("\tconfig-id = %u\n", dtb_info->config_id);
+	}
+
+	if ((child < 0) && (child != -FDT_ERR_NOTFOUND)) {
+		ERROR("%d: fdt_for_each_subnode(): %d\n", __LINE__, node);
+		return child;
+	}
+
+	return 0;
+}
+
+FCONF_REGISTER_POPULATOR(dyn_cfg, fconf_populate_dtb_registry);