refactor(plat/rcar3): factor out DT memory node generation

Move the code that adds single new memory@ node into the DT fragment passed
to system software into separate function. Adjust the failure message to be
more specific and print the address range of node which failed to be added.
No functional change.
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Change-Id: Ie42cd7756b045271f070bca93c524fff6238f5a2

plat/renesas/rcar/bl2_plat_setup.c

@@ -565,12 +565,48 @@ static void bl2_populate_compatible_string(void *dt)
 	}
 }
 
-static void bl2_advertise_dram_entries(uint64_t dram_config[8])
+static void bl2_add_dram_entry(uint64_t start, uint64_t size)
 {
 	char nodename[32] = { 0 };
-	uint64_t start, size;
 	uint64_t fdtsize;
-	int ret, node, chan;
+	int ret, node;
+
+	fdtsize = cpu_to_fdt64(size);
+
+	snprintf(nodename, sizeof(nodename), "memory@");
+	unsigned_num_print(start, 16, nodename + strlen(nodename));
+	node = ret = fdt_add_subnode(fdt, 0, nodename);
+	if (ret < 0) {
+		goto err;
+	}
+
+	ret = fdt_setprop_string(fdt, node, "device_type", "memory");
+	if (ret < 0) {
+		goto err;
+	}
+
+	ret = fdt_setprop_u64(fdt, node, "reg", start);
+	if (ret < 0) {
+		goto err;
+	}
+
+	ret = fdt_appendprop(fdt, node, "reg", &fdtsize,
+			     sizeof(fdtsize));
+	if (ret < 0) {
+		goto err;
+	}
+
+	return;
+err:
+	NOTICE("BL2: Cannot add memory node [%llx - %llx] to FDT (ret=%i)\n",
+		start, start + size - 1, ret);
+	panic();
+}
+
+static void bl2_advertise_dram_entries(uint64_t dram_config[8])
+{
+	uint64_t start, size;
+	int chan;
 
 	for (chan = 0; chan < 4; chan++) {
 		start = dram_config[2 * chan];
@@ -605,32 +641,8 @@ static void bl2_advertise_dram_entries(uint64_t dram_config[8])
 			size -= 0x8000000;
 		}
 
-		fdtsize = cpu_to_fdt64(size);
-
-		snprintf(nodename, sizeof(nodename), "memory@");
-		unsigned_num_print(start, 16, nodename + strlen(nodename));
-		node = ret = fdt_add_subnode(fdt, 0, nodename);
-		if (ret < 0)
-			goto err;
-
-		ret = fdt_setprop_string(fdt, node, "device_type", "memory");
-		if (ret < 0)
-			goto err;
-
-		ret = fdt_setprop_u64(fdt, node, "reg", start);
-		if (ret < 0)
-			goto err;
-
-		ret = fdt_appendprop(fdt, node, "reg", &fdtsize,
-				     sizeof(fdtsize));
-		if (ret < 0)
-			goto err;
+		bl2_add_dram_entry(start, size);
 	}
-
-	return;
-err:
-	NOTICE("BL2: Cannot add memory node to FDT (ret=%i)\n", ret);
-	panic();
 }
 
 static void bl2_advertise_dram_size(uint32_t product)