avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/cmd/lzmadec.c

@@ -0,0 +1,53 @@
+/*
+ * (C) Copyright 2013 Patrice Bouchand <pbfwdlist_gmail_com>
+ * lzma uncompress command in Uboot
+ *
+ * made from existing cmd_unzip.c file of Uboot
+ *
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <mapmem.h>
+#include <asm/io.h>
+
+#include <lzma/LzmaTools.h>
+
+static int do_lzmadec(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+	unsigned long src, dst;
+	unsigned long src_len = ~0UL, dst_len = ~0UL;
+	int ret;
+
+	switch (argc) {
+	case 4:
+		dst_len = simple_strtoul(argv[3], NULL, 16);
+		/* fall through */
+	case 3:
+		src = simple_strtoul(argv[1], NULL, 16);
+		dst = simple_strtoul(argv[2], NULL, 16);
+		break;
+	default:
+		return CMD_RET_USAGE;
+	}
+
+	ret = lzmaBuffToBuffDecompress(map_sysmem(dst, dst_len), &src_len,
+				       map_sysmem(src, 0), dst_len);
+
+	if (ret != SZ_OK)
+		return 1;
+	printf("Uncompressed size: %ld = 0x%lX\n", src_len, src_len);
+	setenv_hex("filesize", src_len);
+
+	return 0;
+}
+
+U_BOOT_CMD(
+	lzmadec,    4,    1,    do_lzmadec,
+	"lzma uncompress a memory region",
+	"srcaddr dstaddr [dstsize]"
+);