TF-A: Add support for Measured Boot driver to FCONF

This patch adds support for Measured Boot driver functionality
to FCONF library code.

Change-Id: I81cdb06f1950f7e6e58f938a1b9c2f74f7cfdf88
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>

lib/fconf/fconf_dyn_cfg_getter.c

@@ -12,7 +12,7 @@
 #include <lib/object_pool.h>
 #include <libfdt.h>
 
-/* We currently use FW, TB_FW, SOC_FW, TOS_FW, NS_fw and HW configs  */
+/* We currently use FW, TB_FW, SOC_FW, TOS_FW, NT_FW and HW configs  */
 #define MAX_DTB_INFO	U(6)
 
 static struct dyn_cfg_dtb_info_t dtb_infos[MAX_DTB_INFO];

lib/fconf/fconf_tbbr_getter.c

@@ -27,20 +27,25 @@ int fconf_populate_tbbr_dyn_config(uintptr_t config)
 	const char *compatible_str = "arm,tb_fw";
 	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);
+		ERROR("FCONF: Can't find `%s` compatible in dtb\n",
+						compatible_str);
 		return node;
 	}
 
 	/* Locate the disable_auth cell and read the value */
-	err = fdt_read_uint32(dtb, node, "disable_auth", &tbbr_dyn_config.disable_auth);
+	err = fdt_read_uint32(dtb, node, "disable_auth",
+					&tbbr_dyn_config.disable_auth);
 	if (err < 0) {
-		WARN("FCONF: Read cell failed for `disable_auth`\n");
+		WARN("FCONF: Read %s failed for `%s`\n",
+				"cell", "disable_auth");
 		return err;
 	}
 
 	/* Check if the value is boolean */
-	if ((tbbr_dyn_config.disable_auth != 0U) && (tbbr_dyn_config.disable_auth != 1U)) {
-		WARN("Invalid value for `disable_auth` cell %d\n", tbbr_dyn_config.disable_auth);
+	if ((tbbr_dyn_config.disable_auth != 0U) &&
+	    (tbbr_dyn_config.disable_auth != 1U)) {
+		WARN("Invalid value for `%s` cell %d\n",
+			"disable_auth", tbbr_dyn_config.disable_auth);
 		return -1;
 	}
 
@@ -52,25 +57,40 @@ int fconf_populate_tbbr_dyn_config(uintptr_t config)
 	/* Retrieve the Mbed TLS heap details from the DTB */
 	err = fdt_read_uint64(dtb, node, "mbedtls_heap_addr", &val64);
 	if (err < 0) {
-		ERROR("FCONF: Read cell failed for mbedtls_heap\n");
+		ERROR("FCONF: Read %s failed for `%s`\n",
+			"cell", "mbedtls_heap_addr");
 		return err;
 	}
 	tbbr_dyn_config.mbedtls_heap_addr = (void *)(uintptr_t)val64;
 
 	err = fdt_read_uint32(dtb, node, "mbedtls_heap_size", &val32);
 	if (err < 0) {
-		ERROR("FCONF: Read cell failed for mbedtls_heap\n");
+		ERROR("FCONF: Read %s failed for `%s`\n",
+			"cell", "mbedtls_heap_size");
 		return err;
 	}
 	tbbr_dyn_config.mbedtls_heap_size = val32;
 
-	VERBOSE("FCONF:tbbr.disable_auth cell found with value = %d\n",
-					tbbr_dyn_config.disable_auth);
-	VERBOSE("FCONF:tbbr.mbedtls_heap_addr cell found with value = %p\n",
-					tbbr_dyn_config.mbedtls_heap_addr);
-	VERBOSE("FCONF:tbbr.mbedtls_heap_size cell found with value = %zu\n",
-					tbbr_dyn_config.mbedtls_heap_size);
-
+#if MEASURED_BOOT
+	/* Retrieve BL2 hash data details from the DTB */
+	err = fdtw_read_bytes(dtb, node, "bl2_hash_data", TCG_DIGEST_SIZE,
+				&tbbr_dyn_config.bl2_hash_data);
+	if (err < 0) {
+		ERROR("FCONF: Read %s failed for '%s'\n",
+				"bytes", "bl2_hash_data");
+		return err;
+	}
+#endif
+	VERBOSE("%s%s%s %d\n", "FCONF: `tbbr.", "disable_auth",
+		"` cell found with value =", tbbr_dyn_config.disable_auth);
+	VERBOSE("%s%s%s %p\n", "FCONF: `tbbr.", "mbedtls_heap_addr",
+		"` cell found with value =", tbbr_dyn_config.mbedtls_heap_addr);
+	VERBOSE("%s%s%s %zu\n", "FCONF: `tbbr.", "mbedtls_heap_size",
+		"` cell found with value =", tbbr_dyn_config.mbedtls_heap_size);
+#if MEASURED_BOOT
+	VERBOSE("%s%s%s %p\n", "FCONF: `tbbr.", "bl2_hash_data",
+		"` array found at address =", tbbr_dyn_config.bl2_hash_data);
+#endif
 	return 0;
 }