diff --git a/commands/boot.c b/commands/boot.c
index fd58824..f403010 100644
--- a/commands/boot.c
+++ b/commands/boot.c
@@ -42,13 +42,9 @@
 static int boot_script(char *path)
 {
 	int ret;
-	struct bootm_data data = {
-		.os_address = UIMAGE_SOME_ADDRESS,
-		.initrd_address = UIMAGE_SOME_ADDRESS,
-	};
+	struct bootm_data data = {};
 
 	globalvar_set_match("linux.bootargs.dyn.", "");
-	globalvar_set_match("bootm.", "");
 
 	ret = run_command(path);
 	if (ret) {
@@ -56,15 +52,9 @@
 		goto out;
 	}
 
-	data.initrd_address = UIMAGE_INVALID_ADDRESS;
-	data.os_address = UIMAGE_SOME_ADDRESS;
-	data.oftree_file = getenv_nonempty("global.bootm.oftree");
-	data.os_file = getenv_nonempty("global.bootm.image");
-	getenv_ul("global.bootm.image.loadaddr", &data.os_address);
-	getenv_ul("global.bootm.initrd.loadaddr", &data.initrd_address);
-	data.initrd_file = getenv_nonempty("global.bootm.initrd");
 	data.verbose = verbose;
 	data.dryrun = dryrun;
+	bootm_data_init_defaults(&data);
 
 	ret = bootm_boot(&data);
 	if (ret)
diff --git a/commands/bootm.c b/commands/bootm.c
index 063da62..6db0e65 100644
--- a/commands/bootm.c
+++ b/commands/bootm.c
@@ -59,19 +59,8 @@
 	int opt;
 	struct bootm_data data = {};
 	int ret = 1;
-	const char *oftree = NULL, *initrd_file = NULL, *os_file = NULL;
 
-	data.initrd_address = UIMAGE_INVALID_ADDRESS;
-	data.os_address = UIMAGE_SOME_ADDRESS;
-	data.verify = 0;
-	data.verbose = 0;
-
-	oftree = getenv("global.bootm.oftree");
-	os_file = getenv("global.bootm.image");
-	getenv_ul("global.bootm.image.loadaddr", &data.os_address);
-	getenv_ul("global.bootm.initrd.loadaddr", &data.initrd_address);
-	if (IS_ENABLED(CONFIG_CMD_BOOTM_INITRD))
-		initrd_file = getenv("global.bootm.initrd");
+	bootm_data_init_defaults(&data);
 
 	while ((opt = getopt(argc, argv, BOOTM_OPTS)) > 0) {
 		switch(opt) {
@@ -83,7 +72,7 @@
 			data.initrd_address = simple_strtoul(optarg, NULL, 0);
 			break;
 		case 'r':
-			initrd_file = optarg;
+			data.initrd_file = optarg;
 			break;
 #endif
 		case 'a':
@@ -96,7 +85,7 @@
 			data.verbose++;
 			break;
 		case 'o':
-			oftree = optarg;
+			data.oftree_file = optarg;
 			break;
 		case 'f':
 			data.force = 1;
@@ -110,23 +99,13 @@
 	}
 
 	if (optind != argc)
-		os_file = argv[optind];
+		data.os_file = argv[optind];
 
-	if (!os_file || !*os_file) {
+	if (!data.os_file) {
 		printf("no boot image given\n");
 		goto err_out;
 	}
 
-	if (initrd_file && !*initrd_file)
-		initrd_file = NULL;
-
-	if (oftree && !*oftree)
-		oftree = NULL;
-
-	data.os_file = os_file;
-	data.oftree_file = oftree;
-	data.initrd_file = initrd_file;
-
 	ret = bootm_boot(&data);
 	if (ret) {
 		printf("handler failed with: %s\n", strerror(-ret));
diff --git a/common/bootm.c b/common/bootm.c
index e399a6a..4409a8b 100644
--- a/common/bootm.c
+++ b/common/bootm.c
@@ -47,6 +47,17 @@
 	return NULL;
 }
 
+void bootm_data_init_defaults(struct bootm_data *data)
+{
+	data->initrd_address = UIMAGE_INVALID_ADDRESS;
+	data->os_address = UIMAGE_SOME_ADDRESS;
+	data->oftree_file = getenv_nonempty("global.bootm.oftree");
+	data->os_file = getenv_nonempty("global.bootm.image");
+	getenv_ul("global.bootm.image.loadaddr", &data->os_address);
+	getenv_ul("global.bootm.initrd.loadaddr", &data->initrd_address);
+	data->initrd_file = getenv_nonempty("global.bootm.initrd");
+}
+
 /*
  * bootm_load_os() - load OS to RAM
  *
diff --git a/include/boot.h b/include/boot.h
index 7c6d9c8..0c0febe 100644
--- a/include/boot.h
+++ b/include/boot.h
@@ -109,6 +109,8 @@
 }
 #endif
 
+void bootm_data_init_defaults(struct bootm_data *data);
+
 int bootm_load_os(struct image_data *data, unsigned long load_address);
 
 bool bootm_has_initrd(struct image_data *data);