cmdximg

@@ -0,0 +1,150 @@
+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+ * 
+ * (C) Copyright 2003
+ * Kai-Uwe Bloem, Auerswald GmbH & Co KG, <[email protected]>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#if (CONFIG_COMMANDS & CFG_CMD_XIMG)
+
+/*
+ * Multi Image extract
+ */
+#include <common.h>
+#include <command.h>
+#include <image.h>
+#include <asm/byteorder.h>
+
+#undef DEBUG
+
+int do_imgextract (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	ulong	addr = load_addr, dest = 0;
+	ulong	data, len, checksum;
+	ulong  *len_ptr;
+	int	i, verify, part = 0;
+	char	pbuf[10], *s;
+	image_header_t header;
+
+	s = getenv ("verify");
+	verify = (s && (*s == 'n')) ? 0 : 1;
+
+	if (argc > 1) {
+		addr = simple_strtoul(argv[1], NULL, 16);
+	}
+	if (argc > 2) {
+		part = simple_strtoul(argv[2], NULL, 16);
+	}
+	if (argc > 3) {
+		dest = simple_strtoul(argv[3], NULL, 16);
+	}
+
+	printf ("## Copying from image at %08lx ...\n", addr);
+
+	/* Copy header so we can blank CRC field for re-calculation */
+	memmove (&header, (char *)addr, sizeof(image_header_t));
+
+	if (ntohl(header.ih_magic) != IH_MAGIC) {
+	    {
+		printf ("Bad Magic Number\n");
+		return 1;
+	    }
+	}
+
+	data = (ulong)&header;
+	len  = sizeof(image_header_t);
+
+	checksum = ntohl(header.ih_hcrc);
+	header.ih_hcrc = 0;
+
+	if (crc32 (0, (char *)data, len) != checksum) {
+		printf ("Bad Header Checksum\n");
+		return 1;
+	}
+
+#ifdef DEBUG
+	print_image_hdr ((image_header_t *) addr);
+#endif
+
+	data = addr + sizeof(image_header_t);
+	len  = ntohl(header.ih_size);
+
+	if (header.ih_type != IH_TYPE_MULTI) {
+		printf ("Wrong Image Type for %s command\n", cmdtp->name);
+		return 1;
+	}
+
+	if (header.ih_comp != IH_COMP_NONE) {
+		printf ("Wrong Compression Type for %s command\n", cmdtp->name);
+		return 1;
+	}
+
+	if (verify) {
+		printf ("   Verifying Checksum ... ");
+		if (crc32 (0, (char *)data, len) != ntohl(header.ih_dcrc)) {
+			printf ("Bad Data CRC\n");
+			return 1;
+		}
+		printf ("OK\n");
+	}
+
+	len_ptr = (ulong *)data;
+
+	data += 4; /* terminator */
+	for (i=0; len_ptr[i]; ++i) {
+		data += 4;
+		if (argc > 2 && part > i) {
+			u_long tail;
+			len = ntohl(len_ptr[i]);
+			tail = len % 4;
+			data += len;
+			if (tail) {
+				data += 4 - tail;
+			}
+		}
+	}
+	if (argc > 2 && part >= i) {
+		printf("Bad Image Part\n");
+		return 1;
+	}
+	len = ntohl(len_ptr[part]);
+
+	if (argc > 3) {
+		memcpy((char *)dest, (char *)data, len);
+	}
+
+	sprintf(pbuf, "%8lx", data);
+	setenv("fileaddr", pbuf);
+	sprintf(pbuf, "%8lx", len);
+	setenv("filesize", pbuf);
+
+	return 0;
+}
+
+U_BOOT_CMD(
+	imxtract,	4,	1,	do_imgextract,
+	"imxtract- extract a part of a multi-image\n",
+	"addr part [dest]\n"
+	"    - extract <part> from image at <addr> and copy to <dest>\n"
+);
+
+#endif

@@ -85,6 +85,7 @@
 #define CFG_CMD_MMC	0x0008000000000000U	/* MMC support			*/
 #define CFG_CMD_FAT	0x0010000000000000U	/* FAT support			*/
 #define CFG_CMD_IMLS	0x0020000000000000U	/* List all found images        */
+#define CFG_CMD_XIMG	0x0040000000000000U	/* load part of multi image     */
 
 #define CFG_CMD_ALL	0xFFFFFFFFFFFFFFFFU	/* ALL commands			*/