1 files changed, 48 insertions, 0 deletions
diff --git a/cmd/unlz4.c b/cmd/unlz4.c
new file mode 100644
index 00000000000..2eadc753e6c
--- /dev/null
+++ b/cmd/unlz4.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020
+ * FUJITSU COMPUTERTECHNOLOGIES LIMITED. All rights reserved.
+ */
+
+#include <command.h>
+#include <env.h>
+#include <mapmem.h>
+#include <vsprintf.h>
+#include <u-boot/lz4.h>
+
+static int do_unlz4(struct cmd_tbl *cmdtp, int flag, int argc,
+		    char *const argv[])
+{
+	unsigned long src, dst;
+	size_t src_len = ~0UL, dst_len = ~0UL;
+	int ret;
+
+	switch (argc) {
+	case 4:
+		src = hextoul(argv[1], NULL);
+		dst = hextoul(argv[2], NULL);
+		dst_len = hextoul(argv[3], NULL);
+		break;
+	default:
+		return CMD_RET_USAGE;
+	}
+
+	ret = ulz4fn(map_sysmem(src, 0), src_len, map_sysmem(dst, dst_len),
+		     &dst_len);
+	if (ret) {
+		printf("Uncompressed err :%d\n", ret);
+		return 1;
+	}
+
+	printf("Uncompressed size: %zd = 0x%zX\n", dst_len, dst_len);
+	env_set_hex("filesize", dst_len);
+
+	return 0;
+}
+
+U_BOOT_CMD(unlz4, 4, 1, do_unlz4,
+	   "lz4 uncompress a memory region",
+	   "srcaddr dstaddr dstsize\n"
+	   "NOTE: Specify the destination size that is sufficiently larger\n"
+	   " than the source size.\n"
+);