cmd: Add unlz4 command

This command is a new command called "unlz4" that decompresses from memory
into memory.
Used with the CONFIG_CMD_UNLZ4 optionenabled.

Signed-off-by: Yusuke Ashiduka <ashiduka@fujitsu.com>
[trini: Use %zd / %zX not %ld / %lX in printf]
Signed-off-by: Tom Rini <trini@konsulko.com>

diff --git a/cmd/Kconfig b/cmd/Kconfig
index faa133d..0e25762 100644 (file)
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -770,6 +770,13 @@ config CMD_LZMADEC
          Support decompressing an LZMA (Lempel-Ziv-Markov chain algorithm)
          image from memory.
 
+config CMD_UNLZ4
+       bool "unlz4"
+       default y if CMD_BOOTI
+       select LZ4
+       help
+         Support decompressing an LZ4 image from memory region.
+
 config CMD_UNZIP
        bool "unzip"
        default y if CMD_BOOTI

diff --git a/cmd/Makefile b/cmd/Makefile
index f1dd513..6692ed9 100644 (file)
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -144,6 +144,7 @@ obj-$(CONFIG_CMD_TSI148) += tsi148.o
 obj-$(CONFIG_CMD_UBI) += ubi.o
 obj-$(CONFIG_CMD_UBIFS) += ubifs.o
 obj-$(CONFIG_CMD_UNIVERSE) += universe.o
+obj-$(CONFIG_CMD_UNLZ4) += unlz4.o
 obj-$(CONFIG_CMD_UNZIP) += unzip.o
 obj-$(CONFIG_CMD_VIRTIO) += virtio.o
 obj-$(CONFIG_CMD_WDT) += wdt.o

diff --git a/cmd/unlz4.c b/cmd/unlz4.c
new file mode 100644 (file)
index 0000000..5320b37
--- /dev/null
+++ b/cmd/unlz4.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020
+ * FUJITSU COMPUTERTECHNOLOGIES LIMITED. All rights reserved.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <env.h>
+#include <lz4.h>
+
+static int do_unlz4(cmd_tbl_t *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 = simple_strtoul(argv[1], NULL, 16);
+               dst = simple_strtoul(argv[2], NULL, 16);
+               dst_len = simple_strtoul(argv[3], NULL, 16);
+               break;
+       default:
+               return CMD_RET_USAGE;
+       }
+
+       ret = ulz4fn((void *)src, src_len, (void *)dst, &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"
+);