[new uImage] Define a API for image handling operations

- Add inline helper macros for basic header processing
- Move common non inline code common/image.c
- Replace direct header access with the API routines
- Rename IH_CPU_* to IH_ARCH_*

Signed-off-by: Marian Balakowicz <m8@semihalf.com>

34 files changed, 822 insertions, 806 deletions

diff --git a/Makefile b/Makefile
index ec8661a..ba6940b 100644
--- a/Makefile
+++ b/Makefile
@@ -2913,7 +2913,8 @@ clobber:	clean
 	@rm -f $(OBJS) $(obj)*.bak $(obj)ctags $(obj)etags $(obj)TAGS
 	@rm -fr $(obj)*.*~
 	@rm -f $(obj)u-boot $(obj)u-boot.map $(obj)u-boot.hex $(ALL)
-	@rm -f $(obj)tools/crc32.c $(obj)tools/environment.c $(obj)tools/env/crc32.c $(obj)tools/sha1.c
+	@rm -f $(obj)tools/crc32.c $(obj)tools/environment.c $(obj)tools/env/crc32.c
+	@rm -f $(obj)tools/sha1.c $(obj)tools/image.c
 	@rm -f $(obj)tools/inca-swap-bytes $(obj)cpu/mpc824x/bedbug_603e.c
 	@rm -f $(obj)include/asm/proc $(obj)include/asm/arch $(obj)include/asm
 	@[ ! -d $(obj)nand_spl ] || find $(obj)nand_spl -lname "*" -print | xargs rm -f
diff --git a/board/cray/L1/L1.c b/board/cray/L1/L1.c
index a0fac7f..8e6d74e 100644
--- a/board/cray/L1/L1.c
+++ b/board/cray/L1/L1.c
@@ -139,8 +139,8 @@ int misc_init_r (void)
 	struct rtc_time tm;
 	char bootcmd[32];
 
-	hdr = (image_header_t *) (CFG_MONITOR_BASE - sizeof (image_header_t));
-	timestamp = (time_t) hdr->ih_time;
+	hdr = (image_header_t *) (CFG_MONITOR_BASE - image_get_header_size ());
+	timestamp = (time_t)image_get_time (hdr);
 	to_tm (timestamp, &tm);
 	printf ("Welcome to U-Boot on Cray L1. Compiled %4d-%02d-%02d  %2d:%02d:%02d (UTC)\n", tm.tm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);
 
diff --git a/board/esd/common/auto_update.c b/board/esd/common/auto_update.c
index a76b00f..cb8087b 100644
--- a/board/esd/common/auto_update.c
+++ b/board/esd/common/auto_update.c
@@ -89,24 +89,22 @@ extern block_dev_desc_t ide_dev_desc[CFG_IDE_MAXDEVICE];
 int au_check_cksum_valid(int i, long nbytes)
 {
 	image_header_t *hdr;
-	unsigned long checksum;
 
 	hdr = (image_header_t *)LOAD_ADDR;
 
-	if ((au_image[i].type == AU_FIRMWARE) && (au_image[i].size != ntohl(hdr->ih_size))) {
+	if ((au_image[i].type == AU_FIRMWARE) &&
+	    (au_image[i].size != image_get_data_size (hdr))) {
 		printf ("Image %s has wrong size\n", au_image[i].name);
 		return -1;
 	}
 
-	if (nbytes != (sizeof(*hdr) + ntohl(hdr->ih_size))) {
+	if (nbytes != (image_get_image_size (hdr))) {
 		printf ("Image %s bad total SIZE\n", au_image[i].name);
 		return -1;
 	}
-	/* check the data CRC */
-	checksum = ntohl(hdr->ih_dcrc);
 
-	if (crc32 (0, (uchar *)(LOAD_ADDR + sizeof(*hdr)), ntohl(hdr->ih_size))
-		!= checksum) {
+	/* check the data CRC */
+	if (!image_check_dcrc (hdr)) {
 		printf ("Image %s bad data checksum\n", au_image[i].name);
 		return -1;
 	}
@@ -123,48 +121,43 @@ int au_check_header_valid(int i, long nbytes)
 	/* check the easy ones first */
 #undef CHECK_VALID_DEBUG
 #ifdef CHECK_VALID_DEBUG
-	printf("magic %#x %#x ", ntohl(hdr->ih_magic), IH_MAGIC);
-	printf("arch %#x %#x ", hdr->ih_arch, IH_CPU_PPC);
-	printf("size %#x %#lx ", ntohl(hdr->ih_size), nbytes);
-	printf("type %#x %#x ", hdr->ih_type, IH_TYPE_KERNEL);
+	printf("magic %#x %#x ", image_get_magic (hdr), IH_MAGIC);
+	printf("arch %#x %#x ", image_get_arch (hdr), IH_ARCH_PPC);
+	printf("size %#x %#lx ", image_get_data_size (hdr), nbytes);
+	printf("type %#x %#x ", image_get_type (hdr), IH_TYPE_KERNEL);
 #endif
-	if (nbytes < sizeof(*hdr))
+	if (nbytes < image_get_header_size ())
 	{
 		printf ("Image %s bad header SIZE\n", au_image[i].name);
 		return -1;
 	}
-	if (ntohl(hdr->ih_magic) != IH_MAGIC || hdr->ih_arch != IH_CPU_PPC)
+	if (!image_check_magic (hdr) || !image_check_arch (hdr, IH_ARCH_PPC))
 	{
 		printf ("Image %s bad MAGIC or ARCH\n", au_image[i].name);
 		return -1;
 	}
-	/* check the hdr CRC */
-	checksum = ntohl(hdr->ih_hcrc);
-	hdr->ih_hcrc = 0;
-
-	if (crc32 (0, (uchar *)hdr, sizeof(*hdr)) != checksum) {
+	if (!image_check_hcrc (hdr)) {
 		printf ("Image %s bad header checksum\n", au_image[i].name);
 		return -1;
 	}
-	hdr->ih_hcrc = htonl(checksum);
 
 	/* check the type - could do this all in one gigantic if() */
-	if ((au_image[i].type == AU_FIRMWARE) && (hdr->ih_type != IH_TYPE_FIRMWARE)) {
+	if ((au_image[i].type == AU_FIRMWARE) && !image_check_type (hdr, IH_TYPE_FIRMWARE)) {
 		printf ("Image %s wrong type\n", au_image[i].name);
 		return -1;
 	}
-	if ((au_image[i].type == AU_SCRIPT) && (hdr->ih_type != IH_TYPE_SCRIPT)) {
+	if ((au_image[i].type == AU_SCRIPT) && !image_check_type (hdr, IH_TYPE_SCRIPT)) {
 		printf ("Image %s wrong type\n", au_image[i].name);
 		return -1;
 	}
 
 	/* recycle checksum */
-	checksum = ntohl(hdr->ih_size);
+	checksum = image_get_data_size (hdr);
 
 #if 0 /* test-only */
 	/* for kernel and app the image header must also fit into flash */
 	if (idx != IDX_DISK)
-		checksum += sizeof(*hdr);
+		checksum += image_get_header_size ();
 	/* check the size does not exceed space in flash. HUSH scripts */
 	/* all have ausize[] set to 0 */
 	if ((ausize[idx] != 0) && (ausize[idx] < checksum)) {
@@ -196,11 +189,11 @@ int au_do_update(int i, long sz)
 		printf("Executing script %s\n", au_image[i].name);
 
 		/* execute a script */
-		if (hdr->ih_type == IH_TYPE_SCRIPT) {
-			addr = (char *)((char *)hdr + sizeof(*hdr));
+		if (image_check_type (hdr, IH_TYPE_SCRIPT)) {
+			addr = (char *)((char *)hdr + image_get_header_size ());
 			/* stick a NULL at the end of the script, otherwise */
 			/* parse_string_outer() runs off the end. */
-			addr[ntohl(hdr->ih_size)] = 0;
+			addr[image_get_data_size (hdr)] = 0;
 			addr += 8;
 
 			/*
@@ -231,8 +224,8 @@ int au_do_update(int i, long sz)
 		 */
 		if (au_image[i].type == AU_FIRMWARE) {
 			char *orig = (char*)start;
-			char *new  = (char *)((char *)hdr + sizeof(*hdr));
-			nbytes = ntohl(hdr->ih_size);
+			char *new  = (char *)((char *)hdr + image_get_header_size ());
+			nbytes = image_get_data_size (hdr);
 
 			while(--nbytes) {
 				if (*orig++ != *new++) {
@@ -272,12 +265,12 @@ int au_do_update(int i, long sz)
 		/* strip the header - except for the kernel and ramdisk */
 		if (au_image[i].type != AU_FIRMWARE) {
 			addr = (char *)hdr;
-			off = sizeof(*hdr);
-			nbytes = sizeof(*hdr) + ntohl(hdr->ih_size);
+			off = image_get_header_size ();
+			nbytes = image_get_image_size (hdr);
 		} else {
-			addr = (char *)((char *)hdr + sizeof(*hdr));
+			addr = (char *)((char *)hdr + image_get_header_size ());
 			off = 0;
-			nbytes = ntohl(hdr->ih_size);
+			nbytes = image_get_data_size (hdr);
 		}
 
 		/*
@@ -305,15 +298,15 @@ int au_do_update(int i, long sz)
 		 * check the dcrc of the copy
 		 */
 		if (au_image[i].type != AU_NAND) {
-			rc = crc32 (0, (uchar *)(start + off), ntohl(hdr->ih_size));
+			rc = crc32 (0, (uchar *)(start + off), image_get_data_size (hdr));
 		} else {
 #if defined(CONFIG_CMD_NAND) && defined(CFG_NAND_LEGACY)
 			rc = nand_legacy_rw(nand_dev_desc, NANDRW_READ | NANDRW_JFFS2 | NANDRW_JFFS2_SKIP,
 				     start, nbytes, (size_t *)&total, (uchar *)addr);
-			rc = crc32 (0, (uchar *)(addr + off), ntohl(hdr->ih_size));
+			rc = crc32 (0, (uchar *)(addr + off), image_get_data_size (hdr));
 #endif
 		}
-		if (rc != ntohl(hdr->ih_dcrc)) {
+		if (rc != image_get_dcrc (hdr)) {
 			printf ("Image %s Bad Data Checksum After COPY\n", au_image[i].name);
 			return -1;
 		}
@@ -497,10 +490,10 @@ int do_auto_update(void)
 
 		printf("Reading %s ...", au_image[i].name);
 		/* just read the header */
-		sz = do_fat_read(au_image[i].name, LOAD_ADDR, sizeof(image_header_t), LS_NO);
+		sz = do_fat_read(au_image[i].name, LOAD_ADDR, image_get_header_size (), LS_NO);
 		debug ("read %s sz %ld hdr %d\n",
-			au_image[i].name, sz, sizeof(image_header_t));
-		if (sz <= 0 || sz < sizeof(image_header_t)) {
+			au_image[i].name, sz, image_get_header_size ());
+		if (sz <= 0 || sz < image_get_header_size ()) {
 			puts(" not found\n");
 			continue;
 		}
@@ -510,8 +503,8 @@ int do_auto_update(void)
 		}
 		sz = do_fat_read(au_image[i].name, LOAD_ADDR, MAX_LOADSZ, LS_NO);
 		debug ("read %s sz %ld hdr %d\n",
-			au_image[i].name, sz, sizeof(image_header_t));
-		if (sz <= 0 || sz <= sizeof(image_header_t)) {
+			au_image[i].name, sz, image_get_header_size ());
+		if (sz <= 0 || sz <= image_get_header_size ()) {
 			puts(" not found\n");
 			continue;
 		}
diff --git a/board/mcc200/auto_update.c b/board/mcc200/auto_update.c
index 28e4c87..8b520c8 100644
--- a/board/mcc200/auto_update.c
+++ b/board/mcc200/auto_update.c
@@ -141,18 +141,15 @@ extern void lcd_enable(void);
 int au_check_cksum_valid(int idx, long nbytes)
 {
 	image_header_t *hdr;
-	unsigned long checksum;
 
 	hdr = (image_header_t *)LOAD_ADDR;
 
-	if (nbytes != (sizeof(*hdr) + ntohl(hdr->ih_size))) {
+	if (nbytes != image_get_image_size (hdr)) {
 		printf ("Image %s bad total SIZE\n", aufile[idx]);
 		return -1;
 	}
 	/* check the data CRC */
-	checksum = ntohl(hdr->ih_dcrc);
-
-	if (crc32 (0, (uchar *)(LOAD_ADDR + sizeof(*hdr)), ntohl(hdr->ih_size)) != checksum) {
+	if (!image_check_dcrc (hdr)) {
 		printf ("Image %s bad data checksum\n", aufile[idx]);
 		return -1;
 	}
@@ -168,56 +165,52 @@ int au_check_header_valid(int idx, long nbytes)
 	/* check the easy ones first */
 #undef CHECK_VALID_DEBUG
 #ifdef CHECK_VALID_DEBUG
-	printf("magic %#x %#x ", ntohl(hdr->ih_magic), IH_MAGIC);
-	printf("arch %#x %#x ", hdr->ih_arch, IH_CPU_ARM);
-	printf("size %#x %#lx ", ntohl(hdr->ih_size), nbytes);
-	printf("type %#x %#x ", hdr->ih_type, IH_TYPE_KERNEL);
+	printf("magic %#x %#x ", image_get_magic (hdr), IH_MAGIC);
+	printf("arch %#x %#x ", image_get_arch (hdr), IH_ARCH_ARM);
+	printf("size %#x %#lx ", image_get_data_size (hdr), nbytes);
+	printf("type %#x %#x ", image_get_type (hdr), IH_TYPE_KERNEL);
 #endif
-	if (nbytes < sizeof(*hdr)) {
+	if (nbytes < image_get_header_size ()) {
 		printf ("Image %s bad header SIZE\n", aufile[idx]);
 		ausize[idx] = 0;
 		return -1;
 	}
-	if (ntohl(hdr->ih_magic) != IH_MAGIC || hdr->ih_arch != IH_CPU_PPC) {
+	if (!image_check_magic (hdr) || !image_check_arch (hdr, IH_ARCH_PPC)) {
 		printf ("Image %s bad MAGIC or ARCH\n", aufile[idx]);
 		ausize[idx] = 0;
 		return -1;
 	}
 	/* check the hdr CRC */
-	checksum = ntohl(hdr->ih_hcrc);
-	hdr->ih_hcrc = 0;
-
-	if (crc32 (0, (uchar *)hdr, sizeof(*hdr)) != checksum) {
+	if (!image_check_hcrc (hdr)) {
 		printf ("Image %s bad header checksum\n", aufile[idx]);
 		ausize[idx] = 0;
 		return -1;
 	}
-	hdr->ih_hcrc = htonl(checksum);
 	/* check the type - could do this all in one gigantic if() */
-	if ((idx == IDX_FIRMWARE) && (hdr->ih_type != IH_TYPE_FIRMWARE)) {
+	if ((idx == IDX_FIRMWARE) && !image_check_type (hdr, IH_TYPE_FIRMWARE)) {
 		printf ("Image %s wrong type\n", aufile[idx]);
 		ausize[idx] = 0;
 		return -1;
 	}
-	if ((idx == IDX_KERNEL) && (hdr->ih_type != IH_TYPE_KERNEL)) {
+	if ((idx == IDX_KERNEL) && !image_check_type (hdr, IH_TYPE_KERNEL)) {
 		printf ("Image %s wrong type\n", aufile[idx]);
 		ausize[idx] = 0;
 		return -1;
 	}
 	if ((idx == IDX_ROOTFS) &&
-		( (hdr->ih_type != IH_TYPE_RAMDISK) && (hdr->ih_type != IH_TYPE_FILESYSTEM) )
-	   ) {
+			(!image_check_type (hdr, IH_TYPE_RAMDISK) &&
+			!image_check_type (hdr, IH_TYPE_FILESYSTEM))) {
 		printf ("Image %s wrong type\n", aufile[idx]);
 		ausize[idx] = 0;
 		return -1;
 	}
 	/* recycle checksum */
-	checksum = ntohl(hdr->ih_size);
+	checksum = image_get_data_size (hdr);
 
-	fsize = checksum + sizeof(*hdr);
+	fsize = checksum + image_get_header_size ();
 	/* for kernel and ramdisk the image header must also fit into flash */
-	if (idx == IDX_KERNEL || hdr->ih_type == IH_TYPE_RAMDISK)
-		checksum += sizeof(*hdr);
+	if (idx == IDX_KERNEL || image_check_type (hdr, IH_TYPE_RAMDISK))
+		checksum += image_get_header_size ();
 
 	/* check the size does not exceed space in flash. HUSH scripts */
 	if ((ausize[idx] != 0) && (ausize[idx] < checksum)) {
@@ -242,11 +235,11 @@ int au_do_update(int idx, long sz)
 	hdr = (image_header_t *)LOAD_ADDR;
 
 	/* execute a script */
-	if (hdr->ih_type == IH_TYPE_SCRIPT) {
-		addr = (char *)((char *)hdr + sizeof(*hdr));
+	if (image_check_type (hdr, IH_TYPE_SCRIPT)) {
+		addr = (char *)((char *)hdr + image_get_header_size ());
 		/* stick a NULL at the end of the script, otherwise */
 		/* parse_string_outer() runs off the end. */
-		addr[ntohl(hdr->ih_size)] = 0;
+		addr[image_get_data_size (hdr)] = 0;
 		addr += 8;
 		parse_string_outer(addr, FLAG_PARSE_SEMICOLON);
 		return 0;
@@ -278,19 +271,20 @@ int au_do_update(int idx, long sz)
 #endif
 
 	/* strip the header - except for the kernel and ramdisk */
-	if (hdr->ih_type == IH_TYPE_KERNEL || hdr->ih_type == IH_TYPE_RAMDISK) {
+	if (image_check_type (hdr, IH_TYPE_KERNEL) ||
+			image_check_type (hdr, IH_TYPE_RAMDISK)) {
 		addr = (char *)hdr;
-		off = sizeof(*hdr);
-		nbytes = sizeof(*hdr) + ntohl(hdr->ih_size);
+		off = image_get_header_size ();
+		nbytes = image_get_image_size (hdr);
 	} else {
-		addr = (char *)((char *)hdr + sizeof(*hdr));
+		addr = (char *)((char *)hdr + image_get_header_size ());
 #ifdef AU_UPDATE_TEST
 		/* copy it to where Linux goes */
 		if (idx == IDX_FIRMWARE)
 			start = aufl_layout[1].start;
 #endif
 		off = 0;
-		nbytes = ntohl(hdr->ih_size);
+		nbytes = image_get_data_size (hdr);
 	}
 
 	/* copy the data from RAM to FLASH */
@@ -306,7 +300,8 @@ int au_do_update(int idx, long sz)
 #endif
 
 	/* check the data CRC of the copy */
-	if (crc32 (0, (uchar *)(start + off), ntohl(hdr->ih_size)) != ntohl(hdr->ih_dcrc)) {
+	if (crc32 (0, (uchar *)(start + off), image_get_data_size (hdr)) !=
+	    image_get_dcrc (hdr)) {
 		printf ("Image %s Bad Data Checksum after COPY\n", aufile[idx]);
 		return -1;
 	}
@@ -442,10 +437,10 @@ int do_auto_update(void)
 	for (i = 0; i < AU_MAXFILES; i++) {
 		ulong imsize;
 		/* just read the header */
-		sz = file_fat_read(aufile[i], LOAD_ADDR, sizeof(image_header_t));
+		sz = file_fat_read(aufile[i], LOAD_ADDR, image_get_header_size ());
 		debug ("read %s sz %ld hdr %d\n",
-			aufile[i], sz, sizeof(image_header_t));
-		if (sz <= 0 || sz < sizeof(image_header_t)) {
+			aufile[i], sz, image_get_header_size ());
+		if (sz <= 0 || sz < image_get_header_size ()) {
 			debug ("%s not found\n", aufile[i]);
 			ausize[i] = 0;
 			continue;
@@ -474,14 +469,14 @@ int do_auto_update(void)
 		sz = file_fat_read(aufile[i], LOAD_ADDR, ausize[i]);
 
 		debug ("read %s sz %ld hdr %d\n",
-			aufile[i], sz, sizeof(image_header_t));
+			aufile[i], sz, image_get_header_size ());
 
 		if (sz != ausize[i]) {
 			printf ("%s: size %d read %d?\n", aufile[i], ausize[i], sz);
 			continue;
 		}
 
-		if (sz <= 0 || sz <= sizeof(image_header_t)) {
+		if (sz <= 0 || sz <= image_get_header_size ()) {
 			debug ("%s not found\n", aufile[i]);
 			continue;
 		}
diff --git a/board/mpl/common/common_util.c b/board/mpl/common/common_util.c
index 8d4cbe8..30c6ca9 100644
--- a/board/mpl/common/common_util.c
+++ b/board/mpl/common/common_util.c
@@ -57,9 +57,6 @@ extern int mem_test(ulong start, ulong ramsize, int quiet);
 
 extern flash_info_t flash_info[];	/* info for FLASH chips */
 
-static image_header_t header;
-
-
 static int
 mpl_prg(uchar *src, ulong size)
 {
@@ -77,7 +74,7 @@ mpl_prg(uchar *src, ulong size)
 	info = &flash_info[0];
 
 #if defined(CONFIG_PIP405) || defined(CONFIG_MIP405) || defined(CONFIG_PATI)
-	if (ntohl(magic[0]) != IH_MAGIC) {
+	if (image_to_cpu (magic[0]) != IH_MAGIC) {
 		puts("Bad Magic number\n");
 		return -1;
 	}
@@ -179,44 +176,39 @@ mpl_prg(uchar *src, ulong size)
 static int
 mpl_prg_image(uchar *ld_addr)
 {
-	unsigned long len, checksum;
+	unsigned long len;
 	uchar *data;
-	image_header_t *hdr = &header;
+	image_header_t *hdr = (image_header_t *)ld_addr;
 	int rc;
 
-	/* Copy header so we can blank CRC field for re-calculation */
-	memcpy (&header, (char *)ld_addr, sizeof(image_header_t));
-	if (ntohl(hdr->ih_magic)  != IH_MAGIC) {
+	if (!image_check_magic (hdr)) {
 		puts("Bad Magic Number\n");
 		return 1;
 	}
 	print_image_hdr(hdr);
-	if (hdr->ih_os  != IH_OS_U_BOOT) {
+	if (!image_check_os (hdr, IH_OS_U_BOOT)) {
 		puts("No U-Boot Image\n");
 		return 1;
 	}
-	if (hdr->ih_type  != IH_TYPE_FIRMWARE) {
+	if (!image_check_type (hdr, IH_TYPE_FIRMWARE)) {
 		puts("No Firmware Image\n");
 		return 1;
 	}
-	data = (uchar *)&header;
-	len  = sizeof(image_header_t);
-	checksum = ntohl(hdr->ih_hcrc);
-	hdr->ih_hcrc = 0;
-	if (crc32 (0, (uchar *)data, len) != checksum) {
+	if (!image_check_hcrc (hdr)) {
 		puts("Bad Header Checksum\n");
 		return 1;
 	}
-	data = ld_addr + sizeof(image_header_t);
-	len  = ntohl(hdr->ih_size);
 	puts("Verifying Checksum ... ");
-	if (crc32 (0, (uchar *)data, len) != ntohl(hdr->ih_dcrc)) {
+	if (!image_check_dcrc (hdr)) {
 		puts("Bad Data CRC\n");
 		return 1;
 	}
 	puts("OK\n");
 
-	if (hdr->ih_comp != IH_COMP_NONE) {
+	data = (uchar *)image_get_data (hdr);
+	len = image_get_data_size (hdr);
+
+	if (image_get_comp (hdr) != IH_COMP_NONE) {
 		uchar *buf;
 		/* reserve space for uncompressed image */
 		if ((buf = malloc(IMAGE_SIZE)) == NULL) {
@@ -224,7 +216,7 @@ mpl_prg_image(uchar *ld_addr)
 			return 1;
 		}
 
-		switch (hdr->ih_comp) {
+		switch (image_get_comp (hdr)) {
 		case IH_COMP_GZIP:
 			puts("Uncompressing (GZIP) ... ");
 			rc = gunzip ((void *)(buf), IMAGE_SIZE, data, &len);
@@ -253,7 +245,8 @@ mpl_prg_image(uchar *ld_addr)
 			break;
 #endif
 		default:
-			printf ("Unimplemented compression type %d\n", hdr->ih_comp);
+			printf ("Unimplemented compression type %d\n",
+				image_get_comp (hdr));
 			free(buf);
 			return 1;
 		}
diff --git a/board/siemens/common/fpga.c b/board/siemens/common/fpga.c
index f022ed6..9d71946 100644
--- a/board/siemens/common/fpga.c
+++ b/board/siemens/common/fpga.c
@@ -131,45 +131,37 @@ static int fpga_reset (fpga_t* fpga)
 static int fpga_load (fpga_t* fpga, ulong addr, int checkall)
 {
     volatile uchar *fpga_addr = (volatile uchar *)fpga->conf_base;
-    image_header_t hdr;
-    ulong len, checksum;
-    uchar *data = (uchar *)&hdr;
-    char *s, msg[32];
+    image_header_t *hdr = (image_header_t *)addr;
+    ulong len;
+    uchar *data;
+    char msg[32];
     int verify, i;
 
     /*
      * Check the image header and data of the net-list
      */
-    memcpy (&hdr, (char *)addr, sizeof(image_header_t));
-
-    if (hdr.ih_magic != IH_MAGIC) {
+    if (!image_check_magic (hdr)) {
 	strcpy (msg, "Bad Image Magic Number");
 	goto failure;
     }
 
-    len  = sizeof(image_header_t);
-
-    checksum = hdr.ih_hcrc;
-    hdr.ih_hcrc = 0;
-
-    if (crc32 (0, data, len) != checksum) {
+    if (!image_check_hcrc (hdr)) {
 	strcpy (msg, "Bad Image Header CRC");
 	goto failure;
     }
 
-    data = (uchar*)(addr + sizeof(image_header_t));
-    len  = hdr.ih_size;
+    data = (uchar*)image_get_data (hdr);
+    len  = image_get_data_size (hdr);
 
-    s = getenv ("verify");
-    verify = (s && (*s == 'n')) ? 0 : 1;
+    verify = getenv_verify ();
     if (verify) {
-	if (crc32 (0, data, len) != hdr.ih_dcrc) {
+	if (!image_check_dcrc (hdr)) {
 	    strcpy (msg, "Bad Image Data CRC");
 	    goto failure;
 	}
     }
 
-    if (checkall && fpga_get_version(fpga, (char *)(hdr.ih_name)) < 0)
+    if (checkall && fpga_get_version(fpga, image_get_name (hdr)) < 0)
 	return 1;
 
     /* align length */
@@ -184,7 +176,7 @@ static int fpga_load (fpga_t* fpga, ulong addr, int checkall)
 	goto failure;
     }
 
-    printf ("(%s)... ", hdr.ih_name);
+    printf ("(%s)... ", image_get_name (hdr));
     /*
      * Copy data to FPGA
      */
@@ -341,7 +333,7 @@ int fpga_init (void)
 	}
 
 	hdr = (image_header_t *)addr;
-	if ((new_id = fpga_get_version(fpga, (char *)(hdr->ih_name))) == -1)
+	if ((new_id = fpga_get_version(fpga, image_get_name (hdr))) == -1)
 	    return 1;
 
 	do_load = 1;
diff --git a/board/trab/auto_update.c b/board/trab/auto_update.c
index 54d3645..bd9ee0c 100644
--- a/board/trab/auto_update.c
+++ b/board/trab/auto_update.c
@@ -209,20 +209,16 @@ int
 au_check_cksum_valid(int idx, long nbytes)
 {
 	image_header_t *hdr;
-	unsigned long checksum;
 
 	hdr = (image_header_t *)LOAD_ADDR;
 
-	if (nbytes != (sizeof(*hdr) + ntohl(hdr->ih_size)))
+	if (nbytes != image_get_image_size (hdr))
 	{
 		printf ("Image %s bad total SIZE\n", aufile[idx]);
 		return -1;
 	}
 	/* check the data CRC */
-	checksum = ntohl(hdr->ih_dcrc);
-
-	if (crc32 (0, (uchar *)(LOAD_ADDR + sizeof(*hdr)), ntohl(hdr->ih_size))
-		!= checksum)
+	if (!image_check_dcrc (hdr)) {
 	{
 		printf ("Image %s bad data checksum\n", aufile[idx]);
 		return -1;
@@ -241,50 +237,46 @@ au_check_header_valid(int idx, long nbytes)
 	/* check the easy ones first */
 #undef CHECK_VALID_DEBUG
 #ifdef CHECK_VALID_DEBUG
-	printf("magic %#x %#x ", ntohl(hdr->ih_magic), IH_MAGIC);
-	printf("arch %#x %#x ", hdr->ih_arch, IH_CPU_ARM);
-	printf("size %#x %#lx ", ntohl(hdr->ih_size), nbytes);
-	printf("type %#x %#x ", hdr->ih_type, IH_TYPE_KERNEL);
+	printf("magic %#x %#x ", image_get_magic (hdr), IH_MAGIC);
+	printf("arch %#x %#x ", image_get_arch (hdr), IH_ARCH_ARM);
+	printf("size %#x %#lx ", image_get_data_size (hdr), nbytes);
+	printf("type %#x %#x ", image_get_type (hdr), IH_TYPE_KERNEL);
 #endif
-	if (nbytes < sizeof(*hdr))
+	if (nbytes < image_get_header_size ())
 	{
 		printf ("Image %s bad header SIZE\n", aufile[idx]);
 		return -1;
 	}
-	if (ntohl(hdr->ih_magic) != IH_MAGIC || hdr->ih_arch != IH_CPU_ARM)
+	if (!image_check_magic (hdr) || !image_check_arch (hdr, IH_ARCH_ARM))
 	{
 		printf ("Image %s bad MAGIC or ARCH\n", aufile[idx]);
 		return -1;
 	}
 	/* check the hdr CRC */
-	checksum = ntohl(hdr->ih_hcrc);
-	hdr->ih_hcrc = 0;
-
-	if (crc32 (0, (uchar *)hdr, sizeof(*hdr)) != checksum) {
+	if (!image_check_hcrc (hdr)) {
 		printf ("Image %s bad header checksum\n", aufile[idx]);
 		return -1;
 	}
-	hdr->ih_hcrc = htonl(checksum);
 	/* check the type - could do this all in one gigantic if() */
-	if ((idx == IDX_FIRMWARE) && (hdr->ih_type != IH_TYPE_FIRMWARE)) {
+	if ((idx == IDX_FIRMWARE) && !image_check_type (hdr, IH_TYPE_FIRMWARE)) {
 		printf ("Image %s wrong type\n", aufile[idx]);
 		return -1;
 	}
-	if ((idx == IDX_KERNEL) && (hdr->ih_type != IH_TYPE_KERNEL)) {
+	if ((idx == IDX_KERNEL) && !image_check_type (hdr, IH_TYPE_KERNEL)) {
 		printf ("Image %s wrong type\n", aufile[idx]);
 		return -1;
 	}
-	if ((idx == IDX_DISK) && (hdr->ih_type != IH_TYPE_FILESYSTEM)) {
+	if ((idx == IDX_DISK) && !image_check_type (hdr, IH_TYPE_FILESYSTEM)) {
 		printf ("Image %s wrong type\n", aufile[idx]);
 		return -1;
 	}
-	if ((idx == IDX_APP) && (hdr->ih_type != IH_TYPE_RAMDISK)
-	    && (hdr->ih_type != IH_TYPE_FILESYSTEM)) {
+	if ((idx == IDX_APP) && !image_check_type (hdr, IH_TYPE_RAMDISK)
+	    && !image_check_type (hdr, FILESYSTEM)) {
 		printf ("Image %s wrong type\n", aufile[idx]);
 		return -1;
 	}
 	if ((idx == IDX_PREPARE || idx == IDX_PREINST || idx == IDX_POSTINST)
-		&& (hdr->ih_type != IH_TYPE_SCRIPT))
+		&& !image_check_type (hdr, IH_TYPE_SCRIPT))
 	{
 		printf ("Image %s wrong type\n", aufile[idx]);
 		return -1;
@@ -293,10 +285,10 @@ au_check_header_valid(int idx, long nbytes)
 	if (idx == IDX_PREPARE)
 		return 0;
 	/* recycle checksum */
-	checksum = ntohl(hdr->ih_size);
+	checksum = image_get_data_size (hdr);
 	/* for kernel and app the image header must also fit into flash */
 	if ((idx != IDX_DISK) && (idx != IDX_FIRMWARE))
-		checksum += sizeof(*hdr);
+		checksum += image_get_header_size ();
 	/* check the size does not exceed space in flash. HUSH scripts */
 	/* all have ausize[] set to 0 */
 	if ((ausize[idx] != 0) && (ausize[idx] < checksum)) {
@@ -310,10 +302,10 @@ au_check_header_valid(int idx, long nbytes)
 	printf ("buf[0] %#x buf[1] %#x buf[2] %#x buf[3] %#x "
 		"as int %#x time %#x\n",
 		buf[0], buf[1], buf[2], buf[3],
-		*((unsigned int *)buf), ntohl(hdr->ih_time));
+		*((unsigned int *)buf), image_get_time (hdr));
 #endif
 	/* check it */
-	if (*((unsigned int *)buf) >= ntohl(hdr->ih_time)) {
+	if (*((unsigned int *)buf) >= image_get_time (hdr)) {
 		printf ("Image %s is too old\n", aufile[idx]);
 		return -1;
 	}
@@ -340,11 +332,11 @@ au_do_update(int idx, long sz)
 	*CPLD_VFD_BK |= POWER_OFF;
 
 	/* execute a script */
-	if (hdr->ih_type == IH_TYPE_SCRIPT) {
-		addr = (char *)((char *)hdr + sizeof(*hdr));
+	if (image_check_type (hdr, IH_TYPE_SCRIPT)) {
+		addr = (char *)((char *)hdr + image_get_header_size ());
 		/* stick a NULL at the end of the script, otherwise */
 		/* parse_string_outer() runs off the end. */
-		addr[ntohl(hdr->ih_size)] = 0;
+		addr[image_get_data_size (hdr)] = 0;
 		addr += 8;
 		parse_string_outer(addr, FLAG_PARSE_SEMICOLON);
 		return 0;
@@ -372,19 +364,20 @@ au_do_update(int idx, long sz)
 	flash_sect_erase(start, end);
 	wait_ms(100);
 	/* strip the header - except for the kernel and ramdisk */
-	if (hdr->ih_type == IH_TYPE_KERNEL || hdr->ih_type == IH_TYPE_RAMDISK) {
+	if (image_check_type (hdr, IH_TYPE_KERNEL) ||
+			image_check_type (hdr, IH_TYPE_RAMDISK)) {
 		addr = (char *)hdr;
-		off = sizeof(*hdr);
-		nbytes = sizeof(*hdr) + ntohl(hdr->ih_size);
+		off = image_get_header_size ();
+		nbytes = image_get_image_size (hdr);
 	} else {
-		addr = (char *)((char *)hdr + sizeof(*hdr));
+		addr = (char *)((char *)hdr + image_get_header_size ());
 #ifdef AU_UPDATE_TEST
 		/* copy it to where Linux goes */
 		if (idx == IDX_FIRMWARE)
 			start = aufl_layout[1].start;
 #endif
 		off = 0;
-		nbytes = ntohl(hdr->ih_size);
+		nbytes = image_get_data_size (hdr);
 	}
 
 	/* copy the data from RAM to FLASH */
@@ -396,7 +389,8 @@ au_do_update(int idx, long sz)
 	}
 
 	/* check the dcrc of the copy */
-	if (crc32 (0, (uchar *)(start + off), ntohl(hdr->ih_size)) != ntohl(hdr->ih_dcrc)) {
+	if (crc32 (0, (uchar *)(start + off), image_get_data_size (hdr)) !=
+	    image_get_dcrc (hdr)) {
 		printf ("Image %s Bad Data Checksum After COPY\n", aufile[idx]);
 		return -1;
 	}
@@ -425,15 +419,15 @@ au_update_eeprom(int idx)
 	hdr = (image_header_t *)LOAD_ADDR;
 	/* write the time field into EEPROM */
 	off = auee_off[idx].time;
-	val = ntohl(hdr->ih_time);
+	val = image_get_time (hdr);
 	i2c_write_multiple(0x54, off, 1, &val, sizeof(val));
 	/* write the size field into EEPROM */
 	off = auee_off[idx].size;
-	val = ntohl(hdr->ih_size);
+	val = image_get_data_size (hdr);
 	i2c_write_multiple(0x54, off, 1, &val, sizeof(val));
 	/* write the dcrc field into EEPROM */
 	off = auee_off[idx].dcrc;
-	val = ntohl(hdr->ih_dcrc);
+	val = image_get_dcrc (hdr);
 	i2c_write_multiple(0x54, off, 1, &val, sizeof(val));
 	/* enable the power switch */
 	*CPLD_VFD_BK &= ~POWER_OFF;
@@ -577,10 +571,10 @@ do_auto_update(void)
 	/* just loop thru all the possible files */
 	for (i = 0; i < AU_MAXFILES; i++) {
 		/* just read the header */
-		sz = file_fat_read(aufile[i], LOAD_ADDR, sizeof(image_header_t));
+		sz = file_fat_read(aufile[i], LOAD_ADDR, image_get_header_size ());
 		debug ("read %s sz %ld hdr %d\n",
-			aufile[i], sz, sizeof(image_header_t));
-		if (sz <= 0 || sz < sizeof(image_header_t)) {
+			aufile[i], sz, image_get_header_size ());
+		if (sz <= 0 || sz < image_get_header_size ()) {
 			debug ("%s not found\n", aufile[i]);
 			continue;
 		}
@@ -590,8 +584,8 @@ do_auto_update(void)
 		}
 		sz = file_fat_read(aufile[i], LOAD_ADDR, MAX_LOADSZ);
 		debug ("read %s sz %ld hdr %d\n",
-			aufile[i], sz, sizeof(image_header_t));
-		if (sz <= 0 || sz <= sizeof(image_header_t)) {
+			aufile[i], sz, image_get_header_size ());
+		if (sz <= 0 || sz <= image_get_header_size ()) {
 			debug ("%s not found\n", aufile[i]);
 			continue;
 		}
diff --git a/common/Makefile b/common/Makefile
index 533c415..d3a4a85 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -36,6 +36,7 @@ COBJS-y += cmd_autoscript.o
 COBJS-$(CONFIG_CMD_BDI) += cmd_bdinfo.o
 COBJS-$(CONFIG_CMD_BEDBUG) += cmd_bedbug.o
 COBJS-$(CONFIG_CMD_BMP) += cmd_bmp.o
+COBJS-y += image.o
 COBJS-y += cmd_boot.o
 COBJS-y += cmd_bootm.o
 COBJS-$(CONFIG_CMD_CACHE) += cmd_cache.o
diff --git a/common/cmd_autoscript.c b/common/cmd_autoscript.c
index a6038a6..3e68ced 100644
--- a/common/cmd_autoscript.c
+++ b/common/cmd_autoscript.c
@@ -49,56 +49,44 @@
 
 #if defined(CONFIG_AUTOSCRIPT) || defined(CONFIG_CMD_AUTOSCRIPT)
 
-extern image_header_t header;		/* from cmd_bootm.c */
 int
 autoscript (ulong addr)
 {
-	ulong crc, data, len;
-	image_header_t *hdr = &header;
+	ulong len;
+	image_header_t *hdr = (image_header_t *)addr;
 	ulong *len_ptr;
 	char *cmd;
 	int rcode = 0;
 	int verify;
 
-	cmd = getenv ("verify");
-	verify = (cmd && (*cmd == 'n')) ? 0 : 1;
+	verify = getenv_verify ();
 
-
-	memmove (hdr, (char *)addr, sizeof(image_header_t));
-
-	if (ntohl(hdr->ih_magic) != IH_MAGIC) {
+	if (!image_check_magic (hdr)) {
 		puts ("Bad magic number\n");
 		return 1;
 	}
 
-	crc = ntohl(hdr->ih_hcrc);
-	hdr->ih_hcrc = 0;
-	len = sizeof (image_header_t);
-	data = (ulong)hdr;
-	if (crc32(0, (uchar *)data, len) != crc) {
+	if (!image_check_hcrc (hdr)) {
 		puts ("Bad header crc\n");
 		return 1;
 	}
 
-	data = addr + sizeof(image_header_t);
-	len = ntohl(hdr->ih_size);
-
 	if (verify) {
-		if (crc32(0, (uchar *)data, len) != ntohl(hdr->ih_dcrc)) {
+		if (!image_check_dcrc (hdr)) {
 			puts ("Bad data crc\n");
 			return 1;
 		}
 	}
 
-	if (hdr->ih_type != IH_TYPE_SCRIPT) {
+	if (!image_check_type (hdr, IH_TYPE_SCRIPT)) {
 		puts ("Bad image type\n");
 		return 1;
 	}
 
 	/* get length of script */
-	len_ptr = (ulong *)data;
+	len_ptr = (ulong *)image_get_data (hdr);
 
-	if ((len = ntohl(*len_ptr)) == 0) {
+	if ((len = image_to_cpu (*len_ptr)) == 0) {
 		puts ("Empty Script\n");
 		return 1;
 	}
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index 9546729..be8589d 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -21,6 +21,8 @@
  * MA 02111-1307 USA
  */
 
+#define DEBUG
+
 /*
  * Boot support
  */
@@ -73,9 +75,7 @@ extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  * we must make sure to split long operations like memmove() or
  * crc32() into reasonable chunks.
  */
-#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
-# define CHUNKSZ (64 * 1024)
-#endif
+#define CHUNKSZ (64 * 1024)
 
 int  gunzip (void *, int, unsigned char *, unsigned long *);
 
@@ -152,7 +152,7 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 {
 	ulong	iflag;
 	ulong	addr;
-	ulong	data, len, checksum;
+	ulong	data, len;
 	ulong  *len_ptr;
 	uint	unc_len = CFG_BOOTM_LEN;
 	int	i, verify;
@@ -160,8 +160,7 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	int	(*appl)(int, char *[]);
 	image_header_t *hdr = &header;
 
-	s = getenv ("verify");
-	verify = (s && (*s == 'n')) ? 0 : 1;
+	verify = getenv_verify ();
 
 	if (argc < 2) {
 		addr = load_addr;
@@ -175,16 +174,16 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	/* Copy header so we can blank CRC field for re-calculation */
 #ifdef CONFIG_HAS_DATAFLASH
 	if (addr_dataflash(addr)){
-		read_dataflash(addr, sizeof(image_header_t), (char *)&header);
+		read_dataflash (addr, image_get_header_size (), (char *)&header);
 	} else
 #endif
-	memmove (&header, (char *)addr, sizeof(image_header_t));
+	memmove (&header, (char *)addr, image_get_header_size ());
 
-	if (ntohl(hdr->ih_magic) != IH_MAGIC) {
+	if (!image_check_magic (hdr)) {
 #ifdef __I386__	/* correct image format not implemented yet - fake it */
 		if (fake_header(hdr, (void*)addr, -1) != NULL) {
 			/* to compensate for the addition below */
-			addr -= sizeof(image_header_t);
+			addr -= image_get_header_size ();
 			/* turnof verify,
 			 * fake_header() does not fake the data crc
 			 */
@@ -199,13 +198,7 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	}
 	show_boot_progress (2);
 
-	data = (ulong)&header;
-	len  = sizeof(image_header_t);
-
-	checksum = ntohl(hdr->ih_hcrc);
-	hdr->ih_hcrc = 0;
-
-	if (crc32 (0, (uchar *)data, len) != checksum) {
+	if (!image_check_hcrc (hdr)) {
 		puts ("Bad Header Checksum\n");
 		show_boot_progress (-2);
 		return 1;
@@ -214,7 +207,7 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 
 #ifdef CONFIG_HAS_DATAFLASH
 	if (addr_dataflash(addr)){
-		len  = ntohl(hdr->ih_size) + sizeof(image_header_t);
+		len  = image_get_image_size (hdr);
 		read_dataflash(addr, len, (char *)CFG_LOAD_ADDR);
 		addr = CFG_LOAD_ADDR;
 	}
@@ -224,12 +217,13 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	/* for multi-file images we need the data part, too */
 	print_image_hdr ((image_header_t *)addr);
 
-	data = addr + sizeof(image_header_t);
-	len  = ntohl(hdr->ih_size);
+	len = image_get_data_size (hdr);
+	data = addr + image_get_header_size ();
+	len_ptr = (ulong *)data;
 
 	if (verify) {
 		puts ("   Verifying Checksum ... ");
-		if (crc32 (0, (uchar *)data, len) != ntohl(hdr->ih_dcrc)) {
+		if (!image_check_dcrc ((image_header_t *)addr)) {
 			printf ("Bad Data CRC\n");
 			show_boot_progress (-3);
 			return 1;
@@ -238,46 +232,19 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	}
 	show_boot_progress (4);
 
-	len_ptr = (ulong *)data;
-
-#if defined(__ARM__)
-	if (hdr->ih_arch != IH_CPU_ARM)
-#elif defined(__avr32__)
-	if (hdr->ih_arch != IH_CPU_AVR32)
-#elif defined(__bfin__)
-	if (hdr->ih_arch != IH_CPU_BLACKFIN)
-#elif defined(__I386__)
-	if (hdr->ih_arch != IH_CPU_I386)
-#elif defined(__M68K__)
-	if (hdr->ih_arch != IH_CPU_M68K)
-#elif defined(__microblaze__)
-	if (hdr->ih_arch != IH_CPU_MICROBLAZE)
-#elif defined(__mips__)
-	if (hdr->ih_arch != IH_CPU_MIPS)
-#elif defined(__nios__)
-	if (hdr->ih_arch != IH_CPU_NIOS)
-#elif defined(__nios2__)
-	if (hdr->ih_arch != IH_CPU_NIOS2)
-#elif defined(__PPC__)
-	if (hdr->ih_arch != IH_CPU_PPC)
-#elif defined(__sh__)
-	if (hdr->ih_arch != IH_CPU_SH)
-#else
-# error Unknown CPU type
-#endif
-	{
-		printf ("Unsupported Architecture 0x%x\n", hdr->ih_arch);
+	if (!image_check_target_arch (hdr)) {
+		printf ("Unsupported Architecture 0x%x\n", image_get_arch (hdr));
 		show_boot_progress (-4);
 		return 1;
 	}
 	show_boot_progress (5);
 
-	switch (hdr->ih_type) {
+	switch (image_get_type (hdr)) {
 	case IH_TYPE_STANDALONE:
 		name = "Standalone Application";
 		/* A second argument overwrites the load address */
 		if (argc > 2) {
-			hdr->ih_load = htonl(simple_strtoul(argv[2], NULL, 16));
+			image_set_load (hdr, simple_strtoul (argv[2], NULL, 16));
 		}
 		break;
 	case IH_TYPE_KERNEL:
@@ -285,7 +252,7 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 		break;
 	case IH_TYPE_MULTI:
 		name = "Multi-File Image";
-		len  = ntohl(len_ptr[0]);
+		len  = image_to_cpu (len_ptr[0]);
 		/* OS kernel is always the first image */
 		data += 8; /* kernel_len + terminator */
 		for (i=1; len_ptr[i]; ++i)
@@ -316,14 +283,14 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	dcache_disable();
 #endif
 
-	switch (hdr->ih_comp) {
+	switch (image_get_comp (hdr)) {
 	case IH_COMP_NONE:
-		if(ntohl(hdr->ih_load) == addr) {
+		if (image_get_load (hdr) == addr) {
 			printf ("   XIP %s ... ", name);
 		} else {
 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
 			size_t l = len;
-			void *to = (void *)ntohl(hdr->ih_load);
+			void *to = (void *)image_get_load (hdr);
 			void *from = (void *)data;
 
 			printf ("   Loading %s ... ", name);
@@ -337,13 +304,13 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 				l -= tail;
 			}
 #else	/* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */
-			memmove ((void *) ntohl(hdr->ih_load), (uchar *)data, len);
+			memmove ((void *)image_get_load (hdr), (uchar *)data, len);
 #endif	/* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */
 		}
 		break;
 	case IH_COMP_GZIP:
 		printf ("   Uncompressing %s ... ", name);
-		if (gunzip ((void *)ntohl(hdr->ih_load), unc_len,
+		if (gunzip ((void *)image_get_load (hdr), unc_len,
 			    (uchar *)data, &len) != 0) {
 			puts ("GUNZIP ERROR - must RESET board to recover\n");
 			show_boot_progress (-6);
@@ -358,7 +325,7 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 		 * use slower decompression algorithm which requires
 		 * at most 2300 KB of memory.
 		 */
-		i = BZ2_bzBuffToBuffDecompress ((char*)ntohl(hdr->ih_load),
+		i = BZ2_bzBuffToBuffDecompress ((char*)image_get_load (hdr),
 						&unc_len, (char *)data, len,
 						CFG_MALLOC_LEN < (4096 * 1024), 0);
 		if (i != BZ_OK) {
@@ -371,14 +338,14 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	default:
 		if (iflag)
 			enable_interrupts();
-		printf ("Unimplemented compression type %d\n", hdr->ih_comp);
+		printf ("Unimplemented compression type %d\n", image_get_comp (hdr));
 		show_boot_progress (-7);
 		return 1;
 	}
 	puts ("OK\n");
 	show_boot_progress (7);
 
-	switch (hdr->ih_type) {
+	switch (image_get_type (hdr)) {
 	case IH_TYPE_STANDALONE:
 		if (iflag)
 			enable_interrupts();
@@ -392,7 +359,7 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 			setenv("filesize", buf);
 			return 0;
 		}
-		appl = (int (*)(int, char *[]))ntohl(hdr->ih_ep);
+		appl = (int (*)(int, char *[]))image_get_ep (hdr);
 		(*appl)(argc-1, &argv[1]);
 		return 0;
 	case IH_TYPE_KERNEL:
@@ -402,13 +369,13 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	default:
 		if (iflag)
 			enable_interrupts();
-		printf ("Can't boot image type %d\n", hdr->ih_type);
+		printf ("Can't boot image type %d\n", image_get_type (hdr));
 		show_boot_progress (-8);
 		return 1;
 	}
 	show_boot_progress (8);
 
-	switch (hdr->ih_os) {
+	switch (image_get_os (hdr)) {
 	default:			/* handled by (original) Linux case */
 	case IH_OS_LINUX:
 #ifdef CONFIG_SILENT_CONSOLE
@@ -517,7 +484,7 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
 		int	verify)
 {
 	ulong	sp;
-	ulong	len, checksum;
+	ulong	len;
 	ulong	initrd_start, initrd_end;
 	ulong	cmd_start, cmd_end;
 	ulong	initrd_high;
@@ -615,7 +582,7 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
 #endif /* CONFIG_MPC5xxx */
 	}
 
-	kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong)) ntohl(hdr->ih_ep);
+	kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))image_get_ep (hdr);
 
 	/*
 	 * Check if there is an initrd image
@@ -636,60 +603,27 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
 		addr = simple_strtoul(argv[2], NULL, 16);
 
 		printf ("## Loading RAMDisk Image at %08lx ...\n", addr);
+		hdr = (image_header_t *)addr;
 
-		/* Copy header so we can blank CRC field for re-calculation */
-		memmove (&header, (char *)addr, sizeof(image_header_t));
-
-		if (ntohl(hdr->ih_magic)  != IH_MAGIC) {
+		if (!image_check_magic (hdr)) {
 			puts ("Bad Magic Number\n");
 			show_boot_progress (-10);
 			do_reset (cmdtp, flag, argc, argv);
 		}
 
-		data = (ulong)&header;
-		len  = sizeof(image_header_t);
-
-		checksum = ntohl(hdr->ih_hcrc);
-		hdr->ih_hcrc = 0;
-
-		if (crc32 (0, (uchar *)data, len) != checksum) {
+		if (!image_check_hcrc (hdr)) {
 			puts ("Bad Header Checksum\n");
 			show_boot_progress (-11);
 			do_reset (cmdtp, flag, argc, argv);
 		}
-
 		show_boot_progress (10);
 
 		print_image_hdr (hdr);
 
-		data = addr + sizeof(image_header_t);
-		len  = ntohl(hdr->ih_size);
-
 		if (verify) {
-			ulong csum = 0;
-#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
-			ulong cdata = data, edata = cdata + len;
-#endif	/* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */
-
 			puts ("   Verifying Checksum ... ");
 
-#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
-
-			while (cdata < edata) {
-				ulong chunk = edata - cdata;
-
-				if (chunk > CHUNKSZ)
-					chunk = CHUNKSZ;
-				csum = crc32 (csum, (uchar *)cdata, chunk);
-				cdata += chunk;
-
-				WATCHDOG_RESET();
-			}
-#else	/* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */
-			csum = crc32 (0, (uchar *)data, len);
-#endif	/* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */
-
-			if (csum != ntohl(hdr->ih_dcrc)) {
+			if (!image_check_dcrc_wd (hdr, CHUNKSZ)) {
 				puts ("Bad Data CRC\n");
 				show_boot_progress (-12);
 				do_reset (cmdtp, flag, argc, argv);
@@ -699,19 +633,22 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
 
 		show_boot_progress (11);
 
-		if ((hdr->ih_os   != IH_OS_LINUX)	||
-		    (hdr->ih_arch != IH_CPU_PPC)	||
-		    (hdr->ih_type != IH_TYPE_RAMDISK)	) {
+		if (!image_check_os (hdr, IH_OS_LINUX) ||
+		    !image_check_arch (hdr, IH_ARCH_PPC) ||
+		    !image_check_type (hdr, IH_TYPE_RAMDISK)) {
 			puts ("No Linux PPC Ramdisk Image\n");
 			show_boot_progress (-13);
 			do_reset (cmdtp, flag, argc, argv);
 		}
 
+		data = image_get_data (hdr);
+		len = image_get_data_size (hdr);
+
 		/*
 		 * Now check if we have a multifile image
 		 */
-	} else if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1])) {
-		u_long tail    = ntohl(len_ptr[0]) % 4;
+	} else if (image_check_type (hdr, IH_TYPE_MULTI) && (len_ptr[1])) {
+		u_long tail    = image_to_cpu (len_ptr[0]) % 4;
 		int i;
 
 		show_boot_progress (13);
@@ -722,12 +659,12 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
 		for (i=1; len_ptr[i]; ++i)
 			data += 4;
 		/* add kernel length, and align */
-		data += ntohl(len_ptr[0]);
+		data += image_to_cpu (len_ptr[0]);
 		if (tail) {
 			data += 4 - tail;
 		}
 
-		len   = ntohl(len_ptr[1]);
+		len   = image_to_cpu (len_ptr[1]);
 
 	} else {
 		/*
@@ -743,70 +680,64 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
 		of_flat_tree = (char *) simple_strtoul(argv[3], NULL, 16);
 		hdr = (image_header_t *)of_flat_tree;
 #if defined(CONFIG_OF_FLAT_TREE)
-		if (*((ulong *)(of_flat_tree + sizeof(image_header_t))) != OF_DT_HEADER) {
+		if (*((ulong *)(of_flat_tree + image_get_header_size ())) != OF_DT_HEADER) {
 #else
-		if (fdt_check_header(of_flat_tree + sizeof(image_header_t)) != 0) {
+		if (fdt_check_header (of_flat_tree + image_get_header_size ()) != 0) {
 #endif
 #ifndef CFG_NO_FLASH
 			if (addr2info((ulong)of_flat_tree) != NULL)
 				of_data = (ulong)of_flat_tree;
 #endif
-		} else if (ntohl(hdr->ih_magic) == IH_MAGIC) {
+		} else if (image_check_magic (hdr)) {
 			printf("## Flat Device Tree at %08lX\n", hdr);
-			print_image_hdr(hdr);
+			print_image_hdr (hdr);
 
-			if ((ntohl(hdr->ih_load) <  ((unsigned long)hdr + ntohl(hdr->ih_size) + sizeof(hdr))) &&
-			   ((ntohl(hdr->ih_load) + ntohl(hdr->ih_size)) > (unsigned long)hdr)) {
+			if ((image_get_load (hdr) <  ((unsigned long)hdr + image_get_image_size (hdr))) &&
+			   ((image_get_load (hdr) + image_get_data_size (hdr)) > (unsigned long)hdr)) {
 				puts ("ERROR: fdt overwritten - "
 					"must RESET the board to recover.\n");
 				do_reset (cmdtp, flag, argc, argv);
 			}
 
 			puts ("   Verifying Checksum ... ");
-			memmove (&header, (char *)hdr, sizeof(image_header_t));
-			checksum = ntohl(header.ih_hcrc);
-			header.ih_hcrc = 0;
-
-			if(checksum != crc32(0, (uchar *)&header, sizeof(image_header_t))) {
+			if (!image_check_hcrc (hdr)) {
 				puts ("ERROR: fdt header checksum invalid - "
 					"must RESET the board to recover.\n");
 				do_reset (cmdtp, flag, argc, argv);
 			}
 
-			checksum = ntohl(hdr->ih_dcrc);
-			addr = (ulong)((uchar *)(hdr) + sizeof(image_header_t));
-
-			if(checksum != crc32(0, (uchar *)addr, ntohl(hdr->ih_size))) {
+			if (!image_check_dcrc (hdr)) {
 				puts ("ERROR: fdt checksum invalid - "
 					"must RESET the board to recover.\n");
 				do_reset (cmdtp, flag, argc, argv);
 			}
 			puts ("OK\n");
 
-			if (ntohl(hdr->ih_type) != IH_TYPE_FLATDT) {
+			if (!image_check_type (hdr, IH_TYPE_FLATDT)) {
 				puts ("ERROR: uImage is not a fdt - "
 					"must RESET the board to recover.\n");
 				do_reset (cmdtp, flag, argc, argv);
 			}
-			if (ntohl(hdr->ih_comp) != IH_COMP_NONE) {
+			if (image_get_comp (hdr) != IH_COMP_NONE) {
 				puts ("ERROR: uImage is compressed - "
 					"must RESET the board to recover.\n");
 				do_reset (cmdtp, flag, argc, argv);
 			}
 #if defined(CONFIG_OF_FLAT_TREE)
-			if (*((ulong *)(of_flat_tree + sizeof(image_header_t))) != OF_DT_HEADER) {
+			if (*((ulong *)(of_flat_tree + image_get_header_size ())) != OF_DT_HEADER) {
 #else
-			if (fdt_check_header(of_flat_tree + sizeof(image_header_t)) != 0) {
+			if (fdt_check_header (of_flat_tree + image_get_header_size ()) != 0) {
 #endif
 				puts ("ERROR: uImage data is not a fdt - "
 					"must RESET the board to recover.\n");
 				do_reset (cmdtp, flag, argc, argv);
 			}
 
-			memmove((void *)ntohl(hdr->ih_load),
-		       		(void *)(of_flat_tree + sizeof(image_header_t)),
-				ntohl(hdr->ih_size));
-			of_flat_tree = (char *)ntohl(hdr->ih_load);
+			memmove ((void *)image_get_load (hdr),
+				(void *)(of_flat_tree + image_get_header_size ()),
+				image_get_data_size (hdr));
+
+			of_flat_tree = (char *)image_get_load (hdr);
 		} else {
 			puts ("Did not find a flat Flat Device Tree.\n"
 				"Must RESET the board to recover.\n");
@@ -814,8 +745,8 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
 		}
 		printf ("   Booting using the fdt at 0x%x\n",
 				of_flat_tree);
-	} else if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1]) && (len_ptr[2])) {
-		u_long tail    = ntohl(len_ptr[0]) % 4;
+	} else if (image_check_type (hdr, IH_TYPE_MULTI) && (len_ptr[1]) && (len_ptr[2])) {
+		u_long tail    = image_to_cpu (len_ptr[0]) % 4;
 		int i;
 
 		/* skip kernel length, initrd length, and terminator */
@@ -824,14 +755,14 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
 		for (i=2; len_ptr[i]; ++i)
 			of_flat_tree += 4;
 		/* add kernel length, and align */
-		of_flat_tree += ntohl(len_ptr[0]);
+		of_flat_tree += image_to_cpu (len_ptr[0]);
 		if (tail) {
 			of_flat_tree += 4 - tail;
 		}
 
 		/* add initrd length, and align */
-		tail = ntohl(len_ptr[1]) % 4;
-		of_flat_tree += ntohl(len_ptr[1]);
+		tail = image_to_cpu (len_ptr[1]) % 4;
+		of_flat_tree += image_to_cpu (len_ptr[1]);
 		if (tail) {
 			of_flat_tree += 4 - tail;
 		}
@@ -855,10 +786,10 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
 
 #if defined(CONFIG_OF_FLAT_TREE)
 		if (((struct boot_param_header *)of_flat_tree)->totalsize !=
-			ntohl (len_ptr[2])) {
+			image_to_cpu (len_ptr[2])) {
 #else
 		if (be32_to_cpu (fdt_totalsize (of_flat_tree)) !=
-			ntohl(len_ptr[2])) {
+			image_to_cpu (len_ptr[2])) {
 #endif
 			puts ("ERROR: fdt size != image size - "
 				"must RESET the board to recover.\n");
@@ -1098,7 +1029,7 @@ do_bootm_netbsd (cmd_tbl_t *cmdtp, int flag,
 	 */
 
 	img_addr = 0;
-	if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1]))
+	if ((image_check_type (hdr, IH_TYPE_MULTI)) && (len_ptr[1]))
 		img_addr = (image_header_t *) addr;
 
 
@@ -1131,7 +1062,7 @@ do_bootm_netbsd (cmd_tbl_t *cmdtp, int flag,
 		cmdline = "";
 	}
 
-	loader = (void (*)(bd_t *, image_header_t *, char *, char *)) ntohl(hdr->ih_ep);
+	loader = (void (*)(bd_t *, image_header_t *, char *, char *))image_get_ep (hdr);
 
 	printf ("## Transferring control to NetBSD stage-2 loader (at address %08lx) ...\n",
 		(ulong)loader);
@@ -1234,7 +1165,7 @@ do_bootm_artos (cmd_tbl_t *cmdtp, int flag,
 	}
 	*ss++ = NULL;	/* terminate */
 
-	entry = (void (*)(bd_t *, char *, char **, ulong))ntohl(hdr->ih_ep);
+	entry = (void (*)(bd_t *, char *, char **, ulong))image_get_ep (hdr);
 	(*entry)(kbd, cmdline, fwenv, top);
 }
 #endif
@@ -1288,38 +1219,24 @@ int do_iminfo ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 
 static int image_info (ulong addr)
 {
-	ulong	data, len, checksum;
-	image_header_t *hdr = &header;
+	image_header_t *hdr = (image_header_t *)addr;
 
 	printf ("\n## Checking 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(hdr->ih_magic) != IH_MAGIC) {
+	if (!image_check_magic (hdr)) {
 		puts ("   Bad Magic Number\n");
 		return 1;
 	}
 
-	data = (ulong)&header;
-	len  = sizeof(image_header_t);
-
-	checksum = ntohl(hdr->ih_hcrc);
-	hdr->ih_hcrc = 0;
-
-	if (crc32 (0, (uchar *)data, len) != checksum) {
+	if (!image_check_hcrc (hdr)) {
 		puts ("   Bad Header Checksum\n");
 		return 1;
 	}
 
-	/* for multi-file images we need the data part, too */
-	print_image_hdr ((image_header_t *)addr);
-
-	data = addr + sizeof(image_header_t);
-	len  = ntohl(hdr->ih_size);
+	print_image_hdr (hdr);
 
 	puts ("   Verifying Checksum ... ");
-	if (crc32 (0, (uchar *)data, len) != ntohl(hdr->ih_dcrc)) {
+	if (!image_check_dcrc (hdr)) {
 		puts ("   Bad Data CRC\n");
 		return 1;
 	}
@@ -1347,38 +1264,29 @@ int do_imls (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	flash_info_t *info;
 	int i, j;
 	image_header_t *hdr;
-	ulong data, len, checksum;
 
 	for (i=0, info=&flash_info[0]; i<CFG_MAX_FLASH_BANKS; ++i, ++info) {
 		if (info->flash_id == FLASH_UNKNOWN)
 			goto next_bank;
 		for (j=0; j<info->sector_count; ++j) {
 
-			if (!(hdr=(image_header_t *)info->start[j]) ||
-			    (ntohl(hdr->ih_magic) != IH_MAGIC))
-				goto next_sector;
+			hdr = (image_header_t *)info->start[j];
 
-			/* Copy header so we can blank CRC field for re-calculation */
-			memmove (&header, (char *)hdr, sizeof(image_header_t));
-
-			checksum = ntohl(header.ih_hcrc);
-			header.ih_hcrc = 0;
+			if (!hdr || !image_check_magic (hdr))
+				goto next_sector;
 
-			if (crc32 (0, (uchar *)&header, sizeof(image_header_t))
-			    != checksum)
+			if (!image_check_hcrc (hdr))
 				goto next_sector;
 
 			printf ("Image at %08lX:\n", (ulong)hdr);
-			print_image_hdr( hdr );
-
-			data = (ulong)hdr + sizeof(image_header_t);
-			len  = ntohl(hdr->ih_size);
+			print_image_hdr (hdr);
 
 			puts ("   Verifying Checksum ... ");
-			if (crc32 (0, (uchar *)data, len) != ntohl(hdr->ih_dcrc)) {
-				puts ("   Bad Data CRC\n");
+			if (!image_check_dcrc (hdr)) {
+				puts ("Bad Data CRC\n");
+			} else {
+				puts ("OK\n");
 			}
-			puts ("OK\n");
 next_sector:		;
 		}
 next_bank:	;
@@ -1400,11 +1308,11 @@ void
 print_image_hdr (image_header_t *hdr)
 {
 #if defined(CONFIG_TIMESTAMP) || defined(CONFIG_CMD_DATE)
-	time_t timestamp = (time_t)ntohl(hdr->ih_time);
+	time_t timestamp = (time_t)image_get_time (hdr);
 	struct rtc_time tm;
 #endif
 
-	printf ("   Image Name:   %.*s\n", IH_NMLEN, hdr->ih_name);
+	printf ("   Image Name:   %.*s\n", IH_NMLEN, image_get_name (hdr));
 #if defined(CONFIG_TIMESTAMP) || defined(CONFIG_CMD_DATE)
 	to_tm (timestamp, &tm);
 	printf ("   Created:      %4d-%02d-%02d  %2d:%02d:%02d UTC\n",
@@ -1412,19 +1320,19 @@ print_image_hdr (image_header_t *hdr)
 		tm.tm_hour, tm.tm_min, tm.tm_sec);
 #endif
 	puts ("   Image Type:   "); print_type(hdr);
-	printf ("\n   Data Size:    %d Bytes = ", ntohl(hdr->ih_size));
-	print_size (ntohl(hdr->ih_size), "\n");
+	printf ("\n   Data Size:    %d Bytes = ", image_get_data_size (hdr));
+	print_size (image_get_data_size (hdr), "\n");
 	printf ("   Load Address: %08x\n"
 		"   Entry Point:  %08x\n",
-		 ntohl(hdr->ih_load), ntohl(hdr->ih_ep));
+		 image_get_load (hdr), image_get_ep (hdr));
 
-	if (hdr->ih_type == IH_TYPE_MULTI) {
+	if (image_check_type (hdr, IH_TYPE_MULTI)) {
 		int i;
 		ulong len;
-		ulong *len_ptr = (ulong *)((ulong)hdr + sizeof(image_header_t));
+		ulong *len_ptr = (ulong *)((ulong)hdr + image_get_header_size ());
 
 		puts ("   Contents:\n");
-		for (i=0; (len = ntohl(*len_ptr)); ++i, ++len_ptr) {
+		for (i=0; (len = image_to_cpu (*len_ptr)); ++i, ++len_ptr) {
 			printf ("   Image %d: %8ld Bytes = ", i, len);
 			print_size (len, "\n");
 		}
@@ -1437,7 +1345,7 @@ print_type (image_header_t *hdr)
 {
 	char *os, *arch, *type, *comp;
 
-	switch (hdr->ih_os) {
+	switch (image_get_os (hdr)) {
 	case IH_OS_INVALID:	os = "Invalid OS";		break;
 	case IH_OS_NETBSD:	os = "NetBSD";			break;
 	case IH_OS_LINUX:	os = "Linux";			break;
@@ -1454,29 +1362,29 @@ print_type (image_header_t *hdr)
 	default:		os = "Unknown OS";		break;
 	}
 
-	switch (hdr->ih_arch) {
-	case IH_CPU_INVALID:	arch = "Invalid CPU";		break;
-	case IH_CPU_ALPHA:	arch = "Alpha";			break;
-	case IH_CPU_ARM:	arch = "ARM";			break;
-	case IH_CPU_AVR32:	arch = "AVR32";			break;
-	case IH_CPU_BLACKFIN:	arch = "Blackfin";		break;
-	case IH_CPU_I386:	arch = "Intel x86";		break;
-	case IH_CPU_IA64:	arch = "IA64";			break;
-	case IH_CPU_M68K:	arch = "M68K"; 			break;
-	case IH_CPU_MICROBLAZE:	arch = "Microblaze"; 		break;
-	case IH_CPU_MIPS64:	arch = "MIPS 64 Bit";		break;
-	case IH_CPU_MIPS:	arch = "MIPS";			break;
-	case IH_CPU_NIOS2:	arch = "Nios-II";		break;
-	case IH_CPU_NIOS:	arch = "Nios";			break;
-	case IH_CPU_PPC:	arch = "PowerPC";		break;
-	case IH_CPU_S390:	arch = "IBM S390";		break;
-	case IH_CPU_SH:		arch = "SuperH";		break;
-	case IH_CPU_SPARC64:	arch = "SPARC 64 Bit";		break;
-	case IH_CPU_SPARC:	arch = "SPARC";			break;
+	switch (image_get_arch (hdr)) {
+	case IH_ARCH_INVALID:	arch = "Invalid CPU";		break;
+	case IH_ARCH_ALPHA:	arch = "Alpha";			break;
+	case IH_ARCH_ARM:	arch = "ARM";			break;
+	case IH_ARCH_AVR32:	arch = "AVR32";			break;
+	case IH_ARCH_BLACKFIN:	arch = "Blackfin";		break;
+	case IH_ARCH_I386:	arch = "Intel x86";		break;
+	case IH_ARCH_IA64:	arch = "IA64";			break;
+	case IH_ARCH_M68K:	arch = "M68K"; 			break;
+	case IH_ARCH_MICROBLAZE:arch = "Microblaze"; 		break;
+	case IH_ARCH_MIPS64:	arch = "MIPS 64 Bit";		break;
+	case IH_ARCH_MIPS:	arch = "MIPS";			break;
+	case IH_ARCH_NIOS2:	arch = "Nios-II";		break;
+	case IH_ARCH_NIOS:	arch = "Nios";			break;
+	case IH_ARCH_PPC:	arch = "PowerPC";		break;
+	case IH_ARCH_S390:	arch = "IBM S390";		break;
+	case IH_ARCH_SH:	arch = "SuperH";		break;
+	case IH_ARCH_SPARC64:	arch = "SPARC 64 Bit";		break;
+	case IH_ARCH_SPARC:	arch = "SPARC";			break;
 	default:		arch = "Unknown Architecture";	break;
 	}
 
-	switch (hdr->ih_type) {
+	switch (image_get_type (hdr)) {
 	case IH_TYPE_INVALID:	type = "Invalid Image";		break;
 	case IH_TYPE_STANDALONE:type = "Standalone Program";	break;
 	case IH_TYPE_KERNEL:	type = "Kernel Image";		break;
@@ -1488,7 +1396,7 @@ print_type (image_header_t *hdr)
 	default:		type = "Unknown Image";		break;
 	}
 
-	switch (hdr->ih_comp) {
+	switch (image_get_comp (hdr)) {
 	case IH_COMP_NONE:	comp = "uncompressed";		break;
 	case IH_COMP_GZIP:	comp = "gzip compressed";	break;
 	case IH_COMP_BZIP2:	comp = "bzip2 compressed";	break;
@@ -1594,7 +1502,7 @@ do_bootm_rtems (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 	image_header_t *hdr = &header;
 	void	(*entry_point)(bd_t *);
 
-	entry_point = (void (*)(bd_t *)) ntohl(hdr->ih_ep);
+	entry_point = (void (*)(bd_t *))image_get_ep (hdr);
 
 	printf ("## Transferring control to RTEMS (at address %08lx) ...\n",
 		(ulong)entry_point);
@@ -1617,7 +1525,7 @@ do_bootm_vxworks (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 	image_header_t *hdr = &header;
 	char str[80];
 
-	sprintf(str, "%x", ntohl(hdr->ih_ep)); /* write entry-point into string */
+	sprintf(str, "%x", image_get_ep (hdr)); /* write entry-point into string */
 	setenv("loadaddr", str);
 	do_bootvx(cmdtp, 0, 0, NULL);
 }
@@ -1630,7 +1538,7 @@ do_bootm_qnxelf (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 	char *local_args[2];
 	char str[16];
 
-	sprintf(str, "%x", ntohl(hdr->ih_ep)); /* write entry-point into string */
+	sprintf(str, "%x", image_get_ep (hdr)); /* write entry-point into string */
 	local_args[0] = argv[0];
 	local_args[1] = str;	/* and provide it via the arguments */
 	do_bootelf(cmdtp, 0, 2, local_args);
diff --git a/common/cmd_doc.c b/common/cmd_doc.c
index 3d717c0..b20a2e1 100644
--- a/common/cmd_doc.c
+++ b/common/cmd_doc.c
@@ -263,11 +263,11 @@ int do_docboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 
 	hdr = (image_header_t *)addr;
 
-	if (hdr->ih_magic == IH_MAGIC) {
+	if (image_check_magic (hdr)) {
 
 		print_image_hdr (hdr);
 
-		cnt = (ntohl(hdr->ih_size) + sizeof(image_header_t));
+		cnt = image_get_image_size (hdr);
 		cnt -= SECTORSIZE;
 	} else {
 		puts ("\n** Bad Magic Number **\n");
diff --git a/common/cmd_fdc.c b/common/cmd_fdc.c
index 7349412..3b8f80b 100644
--- a/common/cmd_fdc.c
+++ b/common/cmd_fdc.c
@@ -836,13 +836,13 @@ int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 		return 1;
 	}
 	hdr = (image_header_t *)addr;
-	if (ntohl(hdr->ih_magic)  != IH_MAGIC) {
+	if (!image_get_magic (hdr)) {
 		printf ("Bad Magic Number\n");
 		return 1;
 	}
-	print_image_hdr(hdr);
+	print_image_hdr (hdr);
 
-	imsize= ntohl(hdr->ih_size)+sizeof(image_header_t);
+	imsize= image_get_image_size (hdr);
 	nrofblk=imsize/512;
 	if((imsize%512)>0)
 		nrofblk++;
@@ -861,7 +861,7 @@ int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	/* Loading ok, update default load address */
 
 	load_addr = addr;
-	if(hdr->ih_type  == IH_TYPE_KERNEL) {
+	if(image_check_type (hdr, IH_TYPE_KERNEL)) {
 		/* Check if we should attempt an auto-start */
 		if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) {
 			char *local_args[2];
diff --git a/common/cmd_fpga.c b/common/cmd_fpga.c
index f55447a..4030d04 100644
--- a/common/cmd_fpga.c
+++ b/common/cmd_fpga.c
@@ -221,13 +221,13 @@ int do_fpga (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 			image_header_t *hdr = &header;
 			ulong	data;
 
-			memmove (&header, (char *)fpga_data, sizeof(image_header_t));
-			if (ntohl(hdr->ih_magic) != IH_MAGIC) {
+			memmove (&header, (char *)fpga_data, image_get_header_size ());
+			if (!image_check_magic (hdr)) {
 				puts ("Bad Magic Number\n");
 				return 1;
 			}
-			data = ((ulong)fpga_data + sizeof(image_header_t));
-			data_size  = ntohl(hdr->ih_size);
+			data = ((ulong)fpga_data + image_get_header_size ());
+			data_size = image_get_data_size (hdr);
 			rc = fpga_load (dev, (void *)data, data_size);
 		}
 		break;
diff --git a/common/cmd_ide.c b/common/cmd_ide.c
index c38be4f..bcd1325 100644
--- a/common/cmd_ide.c
+++ b/common/cmd_ide.c
@@ -366,7 +366,7 @@ int do_diskboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	char *boot_device = NULL;
 	char *ep;
 	int dev, part = 0;
-	ulong addr, cnt, checksum;
+	ulong addr, cnt;
 	disk_partition_t info;
 	image_header_t *hdr;
 	int rcode = 0;
@@ -448,27 +448,23 @@ int do_diskboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 
 	hdr = (image_header_t *)addr;
 
-	if (ntohl(hdr->ih_magic) != IH_MAGIC) {
+	if (!image_check_magic (hdr)) {
 		printf("\n** Bad Magic Number **\n");
 		show_boot_progress (-49);
 		return 1;
 	}
 	show_boot_progress (49);
 
-	checksum = ntohl(hdr->ih_hcrc);
-	hdr->ih_hcrc = 0;
-
-	if (crc32 (0, (uchar *)hdr, sizeof(image_header_t)) != checksum) {
+	if (!image_check_hcrc (hdr)) {
 		puts ("\n** Bad Header Checksum **\n");
 		show_boot_progress (-50);
 		return 1;
 	}
 	show_boot_progress (50);
-	hdr->ih_hcrc = htonl(checksum); /* restore checksum for later use */
 
 	print_image_hdr (hdr);
 
-	cnt = (ntohl(hdr->ih_size) + sizeof(image_header_t));
+	cnt = image_get_image_size (hdr);
 	cnt += info.blksz - 1;
 	cnt /= info.blksz;
 	cnt -= 1;
diff --git a/common/cmd_nand.c b/common/cmd_nand.c
index 8d6c959..bfa39d7 100644
--- a/common/cmd_nand.c
+++ b/common/cmd_nand.c
@@ -514,16 +514,16 @@ static int nand_load_image(cmd_tbl_t *cmdtp, nand_info_t *nand,
 
 	hdr = (image_header_t *) addr;
 
-	if (ntohl(hdr->ih_magic) != IH_MAGIC) {
-		printf("\n** Bad Magic Number 0x%x **\n", hdr->ih_magic);
+	if (!image_check_magic (hdr)) {
+		printf("\n** Bad Magic Number 0x%x **\n", image_get_magic (hdr));
 		show_boot_progress (-57);
 		return 1;
 	}
 	show_boot_progress (57);
 
-	print_image_hdr(hdr);
+	print_image_hdr (hdr);
 
-	cnt = (ntohl(hdr->ih_size) + sizeof (image_header_t));
+	cnt = image_get_image_size (hdr);
 	if (jffs2) {
 		nand_read_options_t opts;
 		memset(&opts, 0, sizeof(opts));
@@ -982,14 +982,14 @@ int do_nandboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 
 	hdr = (image_header_t *)addr;
 
-	if (ntohl(hdr->ih_magic) == IH_MAGIC) {
+	if (image_check_magic (hdr)) {
 
 		print_image_hdr (hdr);
 
-		cnt = (ntohl(hdr->ih_size) + sizeof(image_header_t));
+		cnt = image_get_image_size (hdr);
 		cnt -= SECTORSIZE;
 	} else {
-		printf ("\n** Bad Magic Number 0x%x **\n", ntohl(hdr->ih_magic));
+		printf ("\n** Bad Magic Number 0x%x **\n", image_get_magic (hdr));
 		show_boot_progress (-57);
 		return 1;
 	}
diff --git a/common/cmd_scsi.c b/common/cmd_scsi.c
index 1cdec15..c2b27a5 100644
--- a/common/cmd_scsi.c
+++ b/common/cmd_scsi.c
@@ -207,7 +207,7 @@ int do_scsiboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	char *boot_device = NULL;
 	char *ep;
 	int dev, part = 0;
-	ulong addr, cnt, checksum;
+	ulong addr, cnt;
 	disk_partition_t info;
 	image_header_t *hdr;
 	int rcode = 0;
@@ -275,22 +275,18 @@ int do_scsiboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 
 	hdr = (image_header_t *)addr;
 
-	if (ntohl(hdr->ih_magic) == IH_MAGIC) {
+	if (!image_check_magic (hdr)) {
 		printf("\n** Bad Magic Number **\n");
 		return 1;
 	}
 
-	checksum = ntohl(hdr->ih_hcrc);
-	hdr->ih_hcrc = 0;
-
-	if (crc32 (0, (uchar *)hdr, sizeof(image_header_t)) != checksum) {
+	if (!image_check_hcrc (hdr)) {
 		puts ("\n** Bad Header Checksum **\n");
 		return 1;
 	}
-	hdr->ih_hcrc = htonl(checksum);	/* restore checksum for later use */
 
 	print_image_hdr (hdr);
-	cnt = (ntohl(hdr->ih_size) + sizeof(image_header_t));
+	cnt = image_get_image_size (hdr);
 	cnt += info.blksz - 1;
 	cnt /= info.blksz;
 	cnt -= 1;
diff --git a/common/cmd_usb.c b/common/cmd_usb.c
index c6b17c2..db2e754 100644
--- a/common/cmd_usb.c
+++ b/common/cmd_usb.c
@@ -311,7 +311,7 @@ int do_usbboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	char *boot_device = NULL;
 	char *ep;
 	int dev, part=1, rcode;
-	ulong addr, cnt, checksum;
+	ulong addr, cnt;
 	disk_partition_t info;
 	image_header_t *hdr;
 	block_dev_desc_t *stor_dev;
@@ -388,23 +388,19 @@ int do_usbboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 
 	hdr = (image_header_t *)addr;
 
-	if (ntohl(hdr->ih_magic) != IH_MAGIC) {
+	if (!image_get_magic (hdr)) {
 		printf("\n** Bad Magic Number **\n");
 		return 1;
 	}
 
-	checksum = ntohl(hdr->ih_hcrc);
-	hdr->ih_hcrc = 0;
-
-	if (crc32 (0, (uchar *)hdr, sizeof(image_header_t)) != checksum) {
+	if (!image_check_hcrc (hdr)) {
 		puts ("\n** Bad Header Checksum **\n");
 		return 1;
 	}
-	hdr->ih_hcrc = htonl(checksum);	/* restore checksum for later use */
 
 	print_image_hdr (hdr);
 
-	cnt = (ntohl(hdr->ih_size) + sizeof(image_header_t));
+	cnt = image_get_image_size (hdr);
 	cnt += info.blksz - 1;
 	cnt /= info.blksz;
 	cnt -= 1;
diff --git a/common/cmd_ximg.c b/common/cmd_ximg.c
index 52e0614..ab579cd 100644
--- a/common/cmd_ximg.c
+++ b/common/cmd_ximg.c
@@ -38,14 +38,13 @@ int
 do_imgextract(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 {
 	ulong addr = load_addr, dest = 0;
-	ulong data, len, checksum;
+	ulong data, len;
 	ulong *len_ptr;
 	int i, verify, part = 0;
 	char pbuf[10], *s;
-	image_header_t header;
+	image_header_t *hdr;
 
-	s = getenv("verify");
-	verify = (s && (*s == 'n')) ? 0 : 1;
+	verify = getenv_verify ();
 
 	if (argc > 1) {
 		addr = simple_strtoul(argv[1], NULL, 16);
@@ -59,50 +58,41 @@ do_imgextract(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 
 	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));
+	hdr = (image_header_t *)addr;
 
-	if (ntohl(header.ih_magic) != IH_MAGIC) {
+	if (!image_check_magic (hdr)) {
 		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) {
+	if (!image_check_hcrc (hdr)) {
 		printf("Bad Header Checksum\n");
 		return 1;
 	}
 #ifdef DEBUG
-	print_image_hdr((image_header_t *) addr);
+	print_image_hdr (hdr);
 #endif
 
-	data = addr + sizeof (image_header_t);
-	len = ntohl(header.ih_size);
-
-	if (header.ih_type != IH_TYPE_MULTI) {
+	if (!image_check_type (hdr, IH_TYPE_MULTI)) {
 		printf("Wrong Image Type for %s command\n", cmdtp->name);
 		return 1;
 	}
 
-	if (header.ih_comp != IH_COMP_NONE) {
+	if (image_get_comp (hdr) != 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)) {
+		if (!image_check_dcrc (hdr)) {
 			printf("Bad Data CRC\n");
 			return 1;
 		}
 		printf("OK\n");
 	}
 
+	data = image_get_data (hdr);
 	len_ptr = (ulong *) data;
 
 	data += 4;		/* terminator */
@@ -110,7 +100,7 @@ do_imgextract(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 		data += 4;
 		if (argc > 2 && part > i) {
 			u_long tail;
-			len = ntohl(len_ptr[i]);
+			len = image_to_cpu (len_ptr[i]);
 			tail = len % 4;
 			data += len;
 			if (tail) {
@@ -122,7 +112,7 @@ do_imgextract(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 		printf("Bad Image Part\n");
 		return 1;
 	}
-	len = ntohl(len_ptr[part]);
+	len = image_to_cpu (len_ptr[part]);
 
 	if (argc > 3) {
 		memcpy((char *) dest, (char *) data, len);
diff --git a/common/image.c b/common/image.c
new file mode 100644
index 0000000..7a0a3d2
--- /dev/null
+++ b/common/image.c
@@ -0,0 +1,91 @@
+/*
+ * (C) Copyright 2008 Semihalf
+ *
+ * (C) Copyright 2000-2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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
+ */
+#ifndef USE_HOSTCC
+# include <common.h>
+# include <watchdog.h>
+#else
+# include "mkimage.h"
+#endif
+
+#include <image.h>
+
+unsigned long crc32 (unsigned long, const unsigned char *, unsigned int);
+
+int image_check_hcrc (image_header_t *hdr)
+{
+	ulong hcrc;
+	ulong len = image_get_header_size ();
+	image_header_t header;
+
+	/* Copy header so we can blank CRC field for re-calculation */
+	memmove (&header, (char *)hdr, image_get_header_size ());
+	image_set_hcrc (&header, 0);
+
+	hcrc = crc32 (0, (unsigned char *)&header, len);
+
+	return (hcrc == image_get_hcrc (hdr));
+}
+
+int image_check_dcrc (image_header_t *hdr)
+{
+	ulong data = image_get_data (hdr);
+	ulong len = image_get_data_size (hdr);
+	ulong dcrc = crc32 (0, (unsigned char *)data, len);
+
+	return (dcrc == image_get_dcrc (hdr));
+}
+
+int image_check_dcrc_wd (image_header_t *hdr, ulong chunksz)
+{
+	ulong dcrc = 0;
+	ulong len = image_get_data_size (hdr);
+	ulong data = image_get_data (hdr);
+
+#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
+	ulong cdata = data;
+	ulong edata = cdata + len;
+
+	while (cdata < edata) {
+		ulong chunk = edata - cdata;
+
+		if (chunk > chunksz)
+			chunk = chunksz;
+		dcrc = crc32 (dcrc, (unsigned char *)cdata, chunk);
+		cdata += chunk;
+
+		WATCHDOG_RESET ();
+	}
+#else
+	dcrc = crc32 (0, (unsigned char *)data, len);
+#endif
+
+	return (dcrc == image_get_dcrc (hdr));
+}
+
+int getenv_verify (void)
+{
+	char *s = getenv ("verify");
+	return (s && (*s == 'n')) ? 0 : 1;
+}
diff --git a/common/lynxkdi.c b/common/lynxkdi.c
index 76a271b..16dc968 100644
--- a/common/lynxkdi.c
+++ b/common/lynxkdi.c
@@ -25,10 +25,10 @@ DECLARE_GLOBAL_DATA_PTR;
 #if defined(CONFIG_MPC8260) || defined(CONFIG_440EP) || defined(CONFIG_440GR)
 void lynxkdi_boot ( image_header_t *hdr )
 {
-	void (*lynxkdi)(void) = (void(*)(void)) ntohl(hdr->ih_ep);
+	void (*lynxkdi)(void) = (void(*)(void))image_get_ep (hdr);
 	lynxos_bootparms_t *parms = (lynxos_bootparms_t *)0x0020;
 	bd_t *kbd;
-	u32 *psz = (u32 *)(ntohl(hdr->ih_load) + 0x0204);
+	u32 *psz = (u32 *)(image_get_load (hdr) + 0x0204);
 
 	memset( parms, 0, sizeof(*parms));
 	kbd = gd->bd;
@@ -40,9 +40,9 @@ void lynxkdi_boot ( image_header_t *hdr )
 	/* Do a simple check for Bluecat so we can pass the
 	 * kernel command line parameters.
 	 */
-	if( le32_to_cpu(*psz) == ntohl(hdr->ih_size) ){	/* FIXME: NOT SURE HERE ! */
+	if( le32_to_cpu(*psz) == image_get_data_size (hdr) ){	/* FIXME: NOT SURE HERE ! */
 	    char *args;
-	    char *cmdline = (char *)(ntohl(hdr->ih_load) + 0x020c);
+	    char *cmdline = (char *)(image_get_load (hdr) + 0x020c);
 	    int len;
 
 	    printf("Booting Bluecat KDI ...\n");
diff --git a/examples/eepro100_eeprom.c b/examples/eepro100_eeprom.c
index a52e68d..2b15d05 100644
--- a/examples/eepro100_eeprom.c
+++ b/examples/eepro100_eeprom.c
@@ -17,8 +17,9 @@
  * and release the resulting code under the GPL.
  */
 
-#define _PPC_STRING_H_		/* avoid unnecessary str/mem functions */
-#define _LINUX_STRING_H_	/* avoid unnecessary str/mem functions */
+/* avoid unnecessary memcpy function */
+#define __HAVE_ARCH_MEMCPY
+#define _PPC_STRING_H_
 
 #include <common.h>
 #include <exports.h>
diff --git a/include/image.h b/include/image.h
index 432fa22..c9f4298 100644
--- a/include/image.h
+++ b/include/image.h
@@ -1,4 +1,6 @@
 /*
+ * (C) Copyright 2008 Semihalf
+ *
  * (C) Copyright 2000-2005
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
@@ -31,6 +33,11 @@
 #ifndef __IMAGE_H__
 #define __IMAGE_H__
 
+#include <asm/byteorder.h>
+#ifndef USE_HOSTCC
+#include <linux/string.h>
+#endif
+
 /*
  * Operating System Codes
  */
@@ -59,25 +66,25 @@
 /*
  * CPU Architecture Codes (supported by Linux)
  */
-#define IH_CPU_INVALID		0	/* Invalid CPU	*/
-#define IH_CPU_ALPHA		1	/* Alpha	*/
-#define IH_CPU_ARM		2	/* ARM		*/
-#define IH_CPU_I386		3	/* Intel x86	*/
-#define IH_CPU_IA64		4	/* IA64		*/
-#define IH_CPU_MIPS		5	/* MIPS		*/
-#define IH_CPU_MIPS64		6	/* MIPS	 64 Bit */
-#define IH_CPU_PPC		7	/* PowerPC	*/
-#define IH_CPU_S390		8	/* IBM S390	*/
-#define IH_CPU_SH		9	/* SuperH	*/
-#define IH_CPU_SPARC		10	/* Sparc	*/
-#define IH_CPU_SPARC64		11	/* Sparc 64 Bit */
-#define IH_CPU_M68K		12	/* M68K		*/
-#define IH_CPU_NIOS		13	/* Nios-32	*/
-#define IH_CPU_MICROBLAZE	14	/* MicroBlaze   */
-#define IH_CPU_NIOS2		15	/* Nios-II	*/
-#define IH_CPU_BLACKFIN		16	/* Blackfin	*/
-#define IH_CPU_AVR32		17	/* AVR32	*/
-#define IH_CPU_ST200	        18	/* STMicroelectronics ST200  */
+#define IH_ARCH_INVALID		0	/* Invalid CPU	*/
+#define IH_ARCH_ALPHA		1	/* Alpha	*/
+#define IH_ARCH_ARM		2	/* ARM		*/
+#define IH_ARCH_I386		3	/* Intel x86	*/
+#define IH_ARCH_IA64		4	/* IA64		*/
+#define IH_ARCH_MIPS		5	/* MIPS		*/
+#define IH_ARCH_MIPS64		6	/* MIPS	 64 Bit */
+#define IH_ARCH_PPC		7	/* PowerPC	*/
+#define IH_ARCH_S390		8	/* IBM S390	*/
+#define IH_ARCH_SH		9	/* SuperH	*/
+#define IH_ARCH_SPARC		10	/* Sparc	*/
+#define IH_ARCH_SPARC64		11	/* Sparc 64 Bit */
+#define IH_ARCH_M68K		12	/* M68K		*/
+#define IH_ARCH_NIOS		13	/* Nios-32	*/
+#define IH_ARCH_MICROBLAZE	14	/* MicroBlaze   */
+#define IH_ARCH_NIOS2		15	/* Nios-II	*/
+#define IH_ARCH_BLACKFIN	16	/* Blackfin	*/
+#define IH_ARCH_AVR32		17	/* AVR32	*/
+#define IH_ARCH_ST200	        18	/* STMicroelectronics ST200  */
 
 /*
  * Image Types
@@ -157,5 +164,137 @@ typedef struct image_header {
 	uint8_t		ih_name[IH_NMLEN];	/* Image Name		*/
 } image_header_t;
 
+#define image_to_cpu(x)		ntohl(x)
+#define cpu_to_image(x)		htonl(x)
+
+static inline uint32_t image_get_header_size (void)
+{
+	return (sizeof (image_header_t));
+}
+
+#define image_get_hdr_l(f) \
+	static inline uint32_t image_get_##f(image_header_t *hdr) \
+	{ \
+		return image_to_cpu (hdr->ih_##f); \
+	}
+image_get_hdr_l (magic);
+image_get_hdr_l (hcrc);
+image_get_hdr_l (time);
+image_get_hdr_l (size);
+image_get_hdr_l (load);
+image_get_hdr_l (ep);
+image_get_hdr_l (dcrc);
+
+#define image_get_hdr_b(f) \
+	static inline uint8_t image_get_##f(image_header_t *hdr) \
+	{ \
+		return hdr->ih_##f; \
+	}
+image_get_hdr_b (os);
+image_get_hdr_b (arch);
+image_get_hdr_b (type);
+image_get_hdr_b (comp);
+
+static inline char *image_get_name (image_header_t *hdr)
+{
+	return (char *)hdr->ih_name;
+}
+
+static inline uint32_t image_get_data_size (image_header_t *hdr)
+{
+	return image_get_size (hdr);
+}
+static inline uint32_t image_get_image_size (image_header_t *hdr)
+{
+	return (image_get_size (hdr) + image_get_header_size ());
+}
+static inline ulong image_get_data (image_header_t *hdr)
+{
+	return ((ulong)hdr + image_get_header_size ());
+}
+
+#define image_set_hdr_l(f) \
+	static inline void image_set_##f(image_header_t *hdr, uint32_t val) \
+	{ \
+		hdr->ih_##f = cpu_to_image (val); \
+	}
+image_set_hdr_l (magic);
+image_set_hdr_l (hcrc);
+image_set_hdr_l (time);
+image_set_hdr_l (size);
+image_set_hdr_l (load);
+image_set_hdr_l (ep);
+image_set_hdr_l (dcrc);
+
+#define image_set_hdr_b(f) \
+	static inline void image_set_##f(image_header_t *hdr, uint8_t val) \
+	{ \
+		hdr->ih_##f = val; \
+	}
+image_set_hdr_b (os);
+image_set_hdr_b (arch);
+image_set_hdr_b (type);
+image_set_hdr_b (comp);
+
+static inline void image_set_name (image_header_t *hdr, const char *name)
+{
+	strncpy (image_get_name (hdr), name, IH_NMLEN);
+}
+
+int image_check_hcrc (image_header_t *hdr);
+int image_check_dcrc (image_header_t *hdr);
+int image_check_dcrc_wd (image_header_t *hdr, ulong chunksize);
+int getenv_verify (void);
+
+static inline int image_check_magic (image_header_t *hdr)
+{
+	return (image_get_magic (hdr) == IH_MAGIC);
+}
+static inline int image_check_type (image_header_t *hdr, uint8_t type)
+{
+	return (image_get_type (hdr) == type);
+}
+static inline int image_check_arch (image_header_t *hdr, uint8_t arch)
+{
+	return (image_get_arch (hdr) == arch);
+}
+static inline int image_check_os (image_header_t *hdr, uint8_t os)
+{
+	return (image_get_os (hdr) == os);
+}
+
+#ifndef USE_HOSTCC
+static inline int image_check_target_arch (image_header_t *hdr)
+{
+#if defined(__ARM__)
+	if (!image_check_arch (hdr, IH_ARCH_ARM))
+#elif defined(__avr32__)
+	if (!image_check_arch (hdr, IH_ARCH_AVR32))
+#elif defined(__bfin__)
+	if (!image_check_arch (hdr, IH_ARCH_BLACKFIN))
+#elif defined(__I386__)
+	if (!image_check_arch (hdr, IH_ARCH_I386))
+#elif defined(__M68K__)
+	if (!image_check_arch (hdr, IH_ARCH_M68K))
+#elif defined(__microblaze__)
+	if (!image_check_arch (hdr, IH_ARCH_MICROBLAZE))
+#elif defined(__mips__)
+	if (!image_check_arch (hdr, IH_ARCH_MIPS))
+#elif defined(__nios__)
+	if (!image_check_arch (hdr, IH_ARCH_NIOS))
+#elif defined(__nios2__)
+	if (!image_check_arch (hdr, IH_ARCH_NIOS2))
+#elif defined(__PPC__)
+	if (!image_check_arch (hdr, IH_ARCH_PPC))
+#elif defined(__sh__)
+	if (!image_check_arch (hdr, IH_ARCH_SH))
+#else
+# error Unknown CPU type
+#endif
+		return 0;
+
+	return 1;
+}
+#endif
 
-#endif	/* __IMAGE_H__ */
+#endif /* __IMAGE_H__ */
diff --git a/lib_arm/armlinux.c b/lib_arm/armlinux.c
index 6d32a41..09038cc 100644
--- a/lib_arm/armlinux.c
+++ b/lib_arm/armlinux.c
@@ -72,7 +72,7 @@ extern image_header_t header;	/* from cmd_bootm.c */
 void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 		     ulong addr, ulong *len_ptr, int verify)
 {
-	ulong len = 0, checksum;
+	ulong len = 0;
 	ulong initrd_start, initrd_end;
 	ulong data;
 	void (*theKernel)(int zero, int arch, uint params);
@@ -83,7 +83,7 @@ void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 	char *commandline = getenv ("bootargs");
 #endif
 
-	theKernel = (void (*)(int, int, uint))ntohl(hdr->ih_ep);
+	theKernel = (void (*)(int, int, uint))image_get_ep (hdr);
 
 	/*
 	 * Check if there is an initrd image
@@ -98,26 +98,20 @@ void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 		/* Copy header so we can blank CRC field for re-calculation */
 #ifdef CONFIG_HAS_DATAFLASH
 		if (addr_dataflash (addr)) {
-			read_dataflash (addr, sizeof (image_header_t),
+			read_dataflash (addr, image_get_header_size (),
 					(char *) &header);
 		} else
 #endif
 			memcpy (&header, (char *) addr,
-				sizeof (image_header_t));
+				image_get_header_size ());
 
-		if (ntohl (hdr->ih_magic) != IH_MAGIC) {
+		if (!image_check_magic (hdr)) {
 			printf ("Bad Magic Number\n");
 			show_boot_progress (-10);
 			do_reset (cmdtp, flag, argc, argv);
 		}
 
-		data = (ulong) & header;
-		len = sizeof (image_header_t);
-
-		checksum = ntohl (hdr->ih_hcrc);
-		hdr->ih_hcrc = 0;
-
-		if (crc32 (0, (unsigned char *) data, len) != checksum) {
+		if (!image_check_hcrc (hdr)) {
 			printf ("Bad Header Checksum\n");
 			show_boot_progress (-11);
 			do_reset (cmdtp, flag, argc, argv);
@@ -127,8 +121,8 @@ void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 
 		print_image_hdr (hdr);
 
-		data = addr + sizeof (image_header_t);
-		len = ntohl (hdr->ih_size);
+		data = image_get_data (hdr);
+		len = image_get_data_size (hdr);
 
 #ifdef CONFIG_HAS_DATAFLASH
 		if (addr_dataflash (addr)) {
@@ -138,11 +132,8 @@ void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 #endif
 
 		if (verify) {
-			ulong csum = 0;
-
 			printf ("   Verifying Checksum ... ");
-			csum = crc32 (0, (unsigned char *) data, len);
-			if (csum != ntohl (hdr->ih_dcrc)) {
+			if (!image_get_dcrc (hdr)) {
 				printf ("Bad Data CRC\n");
 				show_boot_progress (-12);
 				do_reset (cmdtp, flag, argc, argv);
@@ -152,9 +143,9 @@ void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 
 		show_boot_progress (11);
 
-		if ((hdr->ih_os != IH_OS_LINUX) ||
-		    (hdr->ih_arch != IH_CPU_ARM) ||
-		    (hdr->ih_type != IH_TYPE_RAMDISK)) {
+		if (!image_check_os (hdr, IH_OS_LINUX) ||
+		    !image_check_arch (hdr, IH_ARCH_ARM) ||
+		    !image_check_type (hdr, IH_TYPE_RAMDISK)) {
 			printf ("No Linux ARM Ramdisk Image\n");
 			show_boot_progress (-13);
 			do_reset (cmdtp, flag, argc, argv);
@@ -164,15 +155,15 @@ void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 		/*
 		 *we need to copy the ramdisk to SRAM to let Linux boot
 		 */
-		memmove ((void *) ntohl(hdr->ih_load), (uchar *)data, len);
-		data = ntohl(hdr->ih_load);
+		memmove ((void *)image_get_load (hdr), (uchar *)data, len);
+		data = image_get_load (hdr);
 #endif /* CONFIG_B2 || CONFIG_EVB4510 */
 
 		/*
 		 * Now check if we have a multifile image
 		 */
-	} else if ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) {
-		ulong tail = ntohl (len_ptr[0]) % 4;
+	} else if (image_check_type (hdr, IH_TYPE_MULTI) && (len_ptr[1])) {
+		ulong tail = image_to_cpu (len_ptr[0]) % 4;
 		int i;
 
 		show_boot_progress (13);
@@ -183,12 +174,12 @@ void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 		for (i = 1; len_ptr[i]; ++i)
 			data += 4;
 		/* add kernel length, and align */
-		data += ntohl (len_ptr[0]);
+		data += image_to_cpu (len_ptr[0]);
 		if (tail) {
 			data += 4 - tail;
 		}
 
-		len = ntohl (len_ptr[1]);
+		len = image_to_cpu (len_ptr[1]);
 
 	} else {
 		/*
diff --git a/lib_avr32/avr32_linux.c b/lib_avr32/avr32_linux.c
index 62afbd2..44827ec 100644
--- a/lib_avr32/avr32_linux.c
+++ b/lib_avr32/avr32_linux.c
@@ -36,8 +36,6 @@ extern int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
 /* CPU-specific hook to allow flushing of caches, etc. */
 extern void prepare_to_boot(void);
 
-extern image_header_t header;		/* from cmd_bootm.c */
-
 static struct tag *setup_start_tag(struct tag *params)
 {
 	params->hdr.tag = ATAG_CORE;
@@ -181,7 +179,6 @@ void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 	unsigned long data, len = 0;
 	unsigned long initrd_start, initrd_end;
 	unsigned long image_start, image_end;
-	unsigned long checksum;
 	void (*theKernel)(int magic, void *tagtable);
 	image_header_t *hdr;
 	struct tag *params, *params_start;
@@ -189,9 +186,9 @@ void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 
 	hdr = (image_header_t *)addr;
 	image_start = addr;
-	image_end = addr + hdr->ih_size;
+	image_end = addr + image_get_data_size (hdr);
 
-	theKernel = (void *)ntohl(hdr->ih_ep);
+	theKernel = (void *)image_get_ep (hdr);
 
 	/*
 	 * Check if there is an initrd image
@@ -200,42 +197,28 @@ void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 		show_boot_progress (9);
 
 		addr = simple_strtoul(argv[2], NULL, 16);
+		hdr = (image_header_t *)addr;
 
 		printf("## Loading RAMDISK image at %08lx ...\n", addr);
 
-		memcpy(&header, (char *)addr, sizeof(header));
-		hdr = &header;
-
-		if (ntohl(hdr->ih_magic) != IH_MAGIC) {
+		if (!image_check_magic (hdr)) {
 			puts("Bad Magic Number\n");
 			show_boot_progress (-10);
 			do_reset(cmdtp, flag, argc, argv);
 		}
 
-		data = (unsigned long)hdr;
-		len = sizeof(*hdr);
-		checksum = ntohl(hdr->ih_hcrc);
-		hdr->ih_hcrc = 0;
-
-		if (crc32(0, (unsigned char *)data, len) != checksum) {
+		if (!image_check_hcrc (hdr)) {
 			puts("Bad Header Checksum\n");
 			show_boot_progress (-11);
 			do_reset(cmdtp, flag, argc, argv);
 		}
 
 		show_boot_progress (10);
-
-		print_image_hdr(hdr);
-
-		data = addr + sizeof(header);
-		len = ntohl(hdr->ih_size);
+		print_image_hdr (hdr);
 
 		if (verify) {
-			unsigned long csum = 0;
-
 			puts("   Verifying Checksum ... ");
-			csum = crc32(0, (unsigned char *)data, len);
-			if (csum != ntohl(hdr->ih_dcrc)) {
+			if (!image_check_dcrc (hdr)) {
 				puts("Bad Data CRC\n");
 				show_boot_progress (-12);
 				do_reset(cmdtp, flag, argc, argv);
@@ -245,15 +228,19 @@ void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 
 		show_boot_progress (11);
 
-		if ((hdr->ih_os != IH_OS_LINUX) ||
-		    (hdr->ih_arch != IH_CPU_AVR32) ||
-		    (hdr->ih_type != IH_TYPE_RAMDISK)) {
+		if (!image_check_os (hdr, IH_OS_LINUX) ||
+		    !image_check_arch (hdr, IH_ARCH_AVR32) ||
+		    !image_check_type (hdr, IH_TYPE_RAMDISK)) {
 			puts("Not a Linux/AVR32 RAMDISK image\n");
 			show_boot_progress (-13);
 			do_reset(cmdtp, flag, argc, argv);
 		}
-	} else if ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) {
-		ulong tail = ntohl (len_ptr[0]) % 4;
+
+		data = image_get_data (hdr);
+		len = image_get_data_size (hdr);
+
+	} else if (image_check_type (hdr, IH_TYPE_MULTI) && (len_ptr[1])) {
+		ulong tail = image_to_cpu (len_ptr[0]) % 4;
 		int i;
 
 		show_boot_progress (13);
@@ -264,12 +251,12 @@ void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 		for (i = 1; len_ptr[i]; ++i)
 			data += 4;
 		/* add kernel length, and align */
-		data += ntohl (len_ptr[0]);
+		data += image_to_cpu (len_ptr[0]);
 		if (tail) {
 			data += 4 - tail;
 		}
 
-		len = ntohl (len_ptr[1]);
+		len = image_to_cpu (len_ptr[1]);
 	} else {
 		/* no initrd image */
 		show_boot_progress (14);
diff --git a/lib_blackfin/bf533_linux.c b/lib_blackfin/bf533_linux.c
index 80a3dc7..26c6534 100644
--- a/lib_blackfin/bf533_linux.c
+++ b/lib_blackfin/bf533_linux.c
@@ -52,12 +52,13 @@ void do_bootm_linux(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
 {
 	int (*appl) (char *cmdline);
 	char *cmdline;
+	image_header_t *hdr = &header;
 
 #ifdef SHARED_RESOURCES
 	swap_to(FLASH);
 #endif
 
-	appl = (int (*)(char *))ntohl(header.ih_ep);
+	appl = (int (*)(char *))image_get_ep (hdr);
 	printf("Starting Kernel at = %x\n", appl);
 	cmdline = make_command_line();
 	if (icache_status()) {
diff --git a/lib_i386/i386_linux.c b/lib_i386/i386_linux.c
index b4a6f5a..67a78c4 100644
--- a/lib_i386/i386_linux.c
+++ b/lib_i386/i386_linux.c
@@ -50,7 +50,7 @@ void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 {
 	void *base_ptr;
 
-	ulong len = 0, checksum;
+	ulong len = 0;
 	ulong initrd_start, initrd_end;
 	ulong data;
 	image_header_t *hdr = &header;
@@ -60,48 +60,37 @@ void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 	 */
 	if (argc >= 3) {
 		addr = simple_strtoul(argv[2], NULL, 16);
+		hdr = (image_header_t *)addr;
 
 		printf ("## Loading Ramdisk Image at %08lx ...\n", addr);
 
-		/* Copy header so we can blank CRC field for re-calculation */
-		memcpy (&header, (char *)addr, sizeof(image_header_t));
-
-		if (ntohl(hdr->ih_magic) != IH_MAGIC) {
+		if (!image_check_magic (hdr)) {
 			printf ("Bad Magic Number\n");
 			do_reset (cmdtp, flag, argc, argv);
 		}
 
-		data = (ulong)&header;
-		len  = sizeof(image_header_t);
-
-		checksum = ntohl(hdr->ih_hcrc);
-		hdr->ih_hcrc = 0;
-
-		if (crc32 (0, (char *)data, len) != checksum) {
+		if (!image_check_hcrc (hdr)) {
 			printf ("Bad Header Checksum\n");
 			do_reset (cmdtp, flag, argc, argv);
 		}
 
 		print_image_hdr (hdr);
 
-		data = addr + sizeof(image_header_t);
-		len  = ntohl(hdr->ih_size);
+		data = image_get_data (hdr);
+		len = image_get_data_size (hdr);
 
 		if (verify) {
-			ulong csum = 0;
-
 			printf ("   Verifying Checksum ... ");
-			csum = crc32 (0, (char *)data, len);
-			if (csum != ntohl(hdr->ih_dcrc)) {
+			if (!image_check_dcrc (hdr)) {
 				printf ("Bad Data CRC\n");
 				do_reset (cmdtp, flag, argc, argv);
 			}
 			printf ("OK\n");
 		}
 
-		if ((hdr->ih_os   != IH_OS_LINUX)	||
-		    (hdr->ih_arch != IH_CPU_I386)	||
-		    (hdr->ih_type != IH_TYPE_RAMDISK)	) {
+		if (!image_check_os (hdr, IH_OS_LINUX) ||
+		    !image_check_arch (hdr, IH_ARCH_I386) ||
+		    !image_check_type (hdr, IH_TYPE_RAMDISK)) {
 			printf ("No Linux i386 Ramdisk Image\n");
 			do_reset (cmdtp, flag, argc, argv);
 		}
@@ -109,8 +98,8 @@ void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 		/*
 		 * Now check if we have a multifile image
 		 */
-	} else if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1])) {
-		ulong tail    = ntohl(len_ptr[0]) % 4;
+	} else if (image_check_type (hdr, IH_TYPE_MULTI) && (len_ptr[1])) {
+		ulong tail    = image_to_cpu (len_ptr[0]) % 4;
 		int i;
 
 		/* skip kernel length and terminator */
@@ -119,12 +108,12 @@ void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 		for (i=1; len_ptr[i]; ++i)
 			data += 4;
 		/* add kernel length, and align */
-		data += ntohl(len_ptr[0]);
+		data += image_to_cpu (len_ptr[0]);
 		if (tail) {
 			data += 4 - tail;
 		}
 
-		len   = ntohl(len_ptr[1]);
+		len   = image_to_cpu (len_ptr[1]);
 
 	} else {
 		/*
@@ -152,12 +141,13 @@ void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 	}
 
 	/* if multi-part image, we need to advance base ptr */
-	if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1])) {
+	if (image_check_type (hdr, IH_TYPE_MULTI) && (len_ptr[1])) {
 		int i;
 		for (i=0, addr+=sizeof(int); len_ptr[i++]; addr+=sizeof(int));
 	}
 
-	base_ptr = load_zimage((void*)addr + sizeof(image_header_t), ntohl(hdr->ih_size),
+	base_ptr = load_zimage((void*)addr + image_get_header_size (),
+			       image_get_data_size (hdr),
 			       initrd_start, initrd_end-initrd_start, 0);
 
 	if (NULL == base_ptr) {
diff --git a/lib_i386/zimage.c b/lib_i386/zimage.c
index 3510f2f..20f9f8d 100644
--- a/lib_i386/zimage.c
+++ b/lib_i386/zimage.c
@@ -251,25 +251,24 @@ image_header_t *fake_zimage_header(image_header_t *hdr, void *ptr, int size)
 #else
 	checksum = 0;
 #endif
-	memset(hdr, 0, sizeof(image_header_t));
+	memset(hdr, 0, image_get_header_size ());
 
 	/* Build new header */
-	hdr->ih_magic = htonl(IH_MAGIC);
-	hdr->ih_time  = 0;
-	hdr->ih_size  = htonl(size);
-	hdr->ih_load  = htonl(ZIMAGE_LOAD);
-	hdr->ih_ep    = 0;
-	hdr->ih_dcrc  = htonl(checksum);
-	hdr->ih_os    = IH_OS_LINUX;
-	hdr->ih_arch  = IH_CPU_I386;
-	hdr->ih_type  = IH_TYPE_KERNEL;
-	hdr->ih_comp  = IH_COMP_NONE;
-
-	strncpy((char *)hdr->ih_name, "(none)", IH_NMLEN);
-
-	checksum = crc32(0,(const char *)hdr,sizeof(image_header_t));
-
-	hdr->ih_hcrc = htonl(checksum);
+	image_set_magic (hdr, IH_MAGIC);
+	image_set_time (hdr, 0);
+	image_set_size (hdr, size);
+	image_set_load (hdr, ZIMAGE_LOAD);
+	image_set_ep (hdr, 0);
+	image_set_dcrc (hdr, checksum);
+	image_set_os (hdr, IH_OS_LINUX);
+	image_set_arch (hdr, IH_ARCH_I386);
+	image_set_type (hdr, IH_TYPE_KERNEL);
+	image_set_comp (hdr, IH_COMP_NONE);
+
+	image_set_name (hdr, "(none)");
+
+	checksum = crc32 (0, (const char *)hdr, image_get_header_size ());
+	image_set_hcrc (hdr, checksum);
 
 	return hdr;
 }
diff --git a/lib_m68k/m68k_linux.c b/lib_m68k/m68k_linux.c
index cc974c2..3759fd2 100644
--- a/lib_m68k/m68k_linux.c
+++ b/lib_m68k/m68k_linux.c
@@ -48,12 +48,14 @@ DECLARE_GLOBAL_DATA_PTR;
 
 extern image_header_t header;
 
+int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
+
 void do_bootm_linux(cmd_tbl_t * cmdtp, int flag,
 		    int argc, char *argv[],
 		    ulong addr, ulong * len_ptr, int verify)
 {
 	ulong sp;
-	ulong len, checksum;
+	ulong len;
 	ulong initrd_start, initrd_end;
 	ulong cmd_start, cmd_end;
 	ulong initrd_high;
@@ -131,7 +133,7 @@ void do_bootm_linux(cmd_tbl_t * cmdtp, int flag,
 	}
 
 	kernel =
-	    (void (*)(bd_t *, ulong, ulong, ulong, ulong))ntohl(hdr->ih_ep);
+	    (void (*)(bd_t *, ulong, ulong, ulong, ulong))image_get_ep (hdr);
 
 	/*
 	 * Check if there is an initrd image
@@ -142,25 +144,17 @@ void do_bootm_linux(cmd_tbl_t * cmdtp, int flag,
 		SHOW_BOOT_PROGRESS(9);
 
 		addr = simple_strtoul(argv[2], NULL, 16);
+		hdr = (image_header_t *)addr;
 
 		printf("## Loading RAMDisk 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(hdr->ih_magic) != IH_MAGIC) {
+		if (!image_check_magic (hdr)) {
 			puts("Bad Magic Number\n");
 			SHOW_BOOT_PROGRESS(-10);
 			do_reset(cmdtp, flag, argc, argv);
 		}
 
-		data = (ulong) & header;
-		len = sizeof(image_header_t);
-
-		checksum = ntohl(hdr->ih_hcrc);
-		hdr->ih_hcrc = 0;
-
-		if (crc32(0, (uchar *) data, len) != checksum) {
+		if (!image_check_hcrc (hdr)) {
 			puts("Bad Header Checksum\n");
 			SHOW_BOOT_PROGRESS(-11);
 			do_reset(cmdtp, flag, argc, argv);
@@ -168,36 +162,14 @@ void do_bootm_linux(cmd_tbl_t * cmdtp, int flag,
 
 		SHOW_BOOT_PROGRESS(10);
 
-		print_image_hdr(hdr);
+		print_image_hdr (hdr);
 
-		data = addr + sizeof(image_header_t);
-		len = ntohl(hdr->ih_size);
+		data = image_get_data (hdr);
+		len = image_get_data_size (hdr);
 
 		if (verify) {
-			ulong csum = 0;
-#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
-			ulong cdata = data, edata = cdata + len;
-#endif				/* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */
-
 			puts("   Verifying Checksum ... ");
-
-#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
-
-			while (cdata < edata) {
-				ulong chunk = edata - cdata;
-
-				if (chunk > CHUNKSZ)
-					chunk = CHUNKSZ;
-				csum = crc32(csum, (uchar *) cdata, chunk);
-				cdata += chunk;
-
-				WATCHDOG_RESET();
-			}
-#else				/* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */
-			csum = crc32(0, (uchar *) data, len);
-#endif				/* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */
-
-			if (csum != ntohl(hdr->ih_dcrc)) {
+			if (!image_check_dcrc_wd (hdr, CHUNKSZ)) {
 				puts("Bad Data CRC\n");
 				SHOW_BOOT_PROGRESS(-12);
 				do_reset(cmdtp, flag, argc, argv);
@@ -207,9 +179,9 @@ void do_bootm_linux(cmd_tbl_t * cmdtp, int flag,
 
 		SHOW_BOOT_PROGRESS(11);
 
-		if ((hdr->ih_os != IH_OS_LINUX) ||
-		    (hdr->ih_arch != IH_CPU_M68K) ||
-		    (hdr->ih_type != IH_TYPE_RAMDISK)) {
+		if (!image_check_os (hdr, IH_OS_LINUX) ||
+		    !image_check_arch (hdr, IH_ARCH_M68K) ||
+		    !image_check_type (hdr, IH_TYPE_RAMDISK)) {
 			puts("No Linux ColdFire Ramdisk Image\n");
 			SHOW_BOOT_PROGRESS(-13);
 			do_reset(cmdtp, flag, argc, argv);
@@ -218,8 +190,8 @@ void do_bootm_linux(cmd_tbl_t * cmdtp, int flag,
 		/*
 		 * Now check if we have a multifile image
 		 */
-	} else if ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) {
-		u_long tail = ntohl(len_ptr[0]) % 4;
+	} else if (image_check_type (hdr, IH_TYPE_MULTI) && (len_ptr[1])) {
+		u_long tail = image_to_cpu (len_ptr[0]) % 4;
 		int i;
 
 		SHOW_BOOT_PROGRESS(13);
@@ -230,12 +202,12 @@ void do_bootm_linux(cmd_tbl_t * cmdtp, int flag,
 		for (i = 1; len_ptr[i]; ++i)
 			data += 4;
 		/* add kernel length, and align */
-		data += ntohl(len_ptr[0]);
+		data += image_to_cpu (len_ptr[0]);
 		if (tail) {
 			data += 4 - tail;
 		}
 
-		len = ntohl(len_ptr[1]);
+		len = image_to_cpu (len_ptr[1]);
 
 	} else {
 		/*
diff --git a/lib_microblaze/microblaze_linux.c b/lib_microblaze/microblaze_linux.c
index 68b58d4..7cd9799 100644
--- a/lib_microblaze/microblaze_linux.c
+++ b/lib_microblaze/microblaze_linux.c
@@ -48,32 +48,24 @@ void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
 	char *commandline = getenv ("bootargs");
 	int i;
 
-	theKernel = (void (*)(char *))ntohl (hdr->ih_ep);
+	theKernel = (void (*)(char *))image_get_ep (hdr);
 
 	/* Check if there is an initrd image */
 	if (argc >= 3) {
 		show_boot_progress (9);
 
 		addr = simple_strtoul (argv[2], NULL, 16);
+		hdr = (image_header_t *)addr;
 
 		printf ("## Loading Ramdisk Image at %08lx ...\n", addr);
 
-		/* Copy header so we can blank CRC field for re-calculation */
-		memcpy (&header, (char *)addr, sizeof (image_header_t));
-
-		if (ntohl (hdr->ih_magic) != IH_MAGIC) {
+		if (!image_check_magic (hdr)) {
 			printf ("Bad Magic Number\n");
 			show_boot_progress (-10);
 			do_reset (cmdtp, flag, argc, argv);
 		}
 
-		data = (ulong) & header;
-		len = sizeof (image_header_t);
-
-		checksum = ntohl (hdr->ih_hcrc);
-		hdr->ih_hcrc = 0;
-
-		if (crc32 (0, (char *)data, len) != checksum) {
+		if (!image_check_magic (hdr)) {
 			printf ("Bad Header Checksum\n");
 			show_boot_progress (-11);
 			do_reset (cmdtp, flag, argc, argv);
@@ -83,15 +75,12 @@ void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
 
 		print_image_hdr (hdr);
 
-		data = addr + sizeof (image_header_t);
-		len = ntohl (hdr->ih_size);
+		data = image_get_data (hdr);
+		len = image_get_data_size (hdr);
 
 		if (verify) {
-			ulong csum = 0;
-
 			printf ("   Verifying Checksum ... ");
-			csum = crc32 (0, (char *)data, len);
-			if (csum != ntohl (hdr->ih_dcrc)) {
+			if (!image_check_dcrc (hdr)) {
 				printf ("Bad Data CRC\n");
 				show_boot_progress (-12);
 				do_reset (cmdtp, flag, argc, argv);
@@ -101,9 +90,9 @@ void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
 
 		show_boot_progress (11);
 
-		if ((hdr->ih_os != IH_OS_LINUX) ||
-		    (hdr->ih_arch != IH_CPU_MICROBLAZE) ||
-		    (hdr->ih_type != IH_TYPE_RAMDISK)) {
+		if (!image_check_os (hdr, IH_OS_LINUX) ||
+		    !image_check_arch (hdr, IH_ARCH_MICROBLAZE) ||
+		    !image_check_type (hdr, IH_TYPE_RAMDISK)) {
 			printf ("No Linux Microblaze Ramdisk Image\n");
 			show_boot_progress (-13);
 			do_reset (cmdtp, flag, argc, argv);
@@ -112,8 +101,8 @@ void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
 		/*
 		 * Now check if we have a multifile image
 		 */
-	} else if ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) {
-		ulong tail = ntohl (len_ptr[0]) % 4;
+	} else if (image_check_type (hdr, IH_TYPE_MULTI) && (len_ptr[1])) {
+		ulong tail = image_to_cpu (len_ptr[0]) % 4;
 
 		show_boot_progress (13);
 
@@ -123,12 +112,12 @@ void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
 		for (i = 1; len_ptr[i]; ++i)
 			data += 4;
 		/* add kernel length, and align */
-		data += ntohl (len_ptr[0]);
+		data += image_to_cpu (len_ptr[0]);
 		if (tail) {
 			data += 4 - tail;
 		}
 
-		len = ntohl (len_ptr[1]);
+		len = image_to_cpu (len_ptr[1]);
 
 	} else {
 		/*
diff --git a/lib_mips/mips_linux.c b/lib_mips/mips_linux.c
index 556b180..0881b6d 100644
--- a/lib_mips/mips_linux.c
+++ b/lib_mips/mips_linux.c
@@ -51,7 +51,7 @@ static void linux_env_set (char * env_name, char * env_val);
 void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
 		     ulong addr, ulong * len_ptr, int verify)
 {
-	ulong len = 0, checksum;
+	ulong len = 0;
 	ulong initrd_start, initrd_end;
 	ulong data;
 	void (*theKernel) (int, char **, char **, int *);
@@ -60,7 +60,7 @@ void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
 	char env_buf[12];
 
 	theKernel =
-		(void (*)(int, char **, char **, int *)) ntohl (hdr->ih_ep);
+		(void (*)(int, char **, char **, int *))image_get_ep (hdr);
 
 	/*
 	 * Check if there is an initrd image
@@ -69,25 +69,17 @@ void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
 		show_boot_progress (9);
 
 		addr = simple_strtoul (argv[2], NULL, 16);
+		hdr = (image_header_t *)addr;
 
 		printf ("## Loading Ramdisk Image at %08lx ...\n", addr);
 
-		/* Copy header so we can blank CRC field for re-calculation */
-		memcpy (&header, (char *) addr, sizeof (image_header_t));
-
-		if (ntohl (hdr->ih_magic) != IH_MAGIC) {
+		if (!image_check_magic (hdr)) {
 			printf ("Bad Magic Number\n");
 			show_boot_progress (-10);
 			do_reset (cmdtp, flag, argc, argv);
 		}
 
-		data = (ulong) & header;
-		len = sizeof (image_header_t);
-
-		checksum = ntohl (hdr->ih_hcrc);
-		hdr->ih_hcrc = 0;
-
-		if (crc32 (0, (uchar *) data, len) != checksum) {
+		if (!image_check_hcrc (hdr)) {
 			printf ("Bad Header Checksum\n");
 			show_boot_progress (-11);
 			do_reset (cmdtp, flag, argc, argv);
@@ -97,15 +89,12 @@ void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
 
 		print_image_hdr (hdr);
 
-		data = addr + sizeof (image_header_t);
-		len = ntohl (hdr->ih_size);
+		data = image_get_data (hdr);
+		len = image_get_data_size (hdr);
 
 		if (verify) {
-			ulong csum = 0;
-
 			printf ("   Verifying Checksum ... ");
-			csum = crc32 (0, (uchar *) data, len);
-			if (csum != ntohl (hdr->ih_dcrc)) {
+			if (!image_check_dcrc (hdr)) {
 				printf ("Bad Data CRC\n");
 				show_boot_progress (-12);
 				do_reset (cmdtp, flag, argc, argv);
@@ -115,9 +104,9 @@ void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
 
 		show_boot_progress (11);
 
-		if ((hdr->ih_os != IH_OS_LINUX) ||
-		    (hdr->ih_arch != IH_CPU_MIPS) ||
-		    (hdr->ih_type != IH_TYPE_RAMDISK)) {
+		if (!image_check_os (hdr, IH_OS_LINUX) ||
+		    !image_check_arch (hdr, IH_ARCH_MIPS) ||
+		    !image_check_type (hdr, IH_TYPE_RAMDISK)) {
 			printf ("No Linux MIPS Ramdisk Image\n");
 			show_boot_progress (-13);
 			do_reset (cmdtp, flag, argc, argv);
@@ -126,8 +115,8 @@ void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
 		/*
 		 * Now check if we have a multifile image
 		 */
-	} else if ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) {
-		ulong tail = ntohl (len_ptr[0]) % 4;
+	} else if (image_check_type (hdr, IH_TYPE_MULTI) && (len_ptr[1])) {
+		ulong tail = image_to_cpu (len_ptr[0]) % 4;
 		int i;
 
 		show_boot_progress (13);
@@ -138,12 +127,12 @@ void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
 		for (i = 1; len_ptr[i]; ++i)
 			data += 4;
 		/* add kernel length, and align */
-		data += ntohl (len_ptr[0]);
+		data += image_to_cpu (len_ptr[0]);
 		if (tail) {
 			data += 4 - tail;
 		}
 
-		len = ntohl (len_ptr[1]);
+		len = image_to_cpu (len_ptr[1]);
 
 	} else {
 		/*
diff --git a/lib_nios2/nios_linux.c b/lib_nios2/nios_linux.c
index 9eb3426..dea1ec1 100644
--- a/lib_nios2/nios_linux.c
+++ b/lib_nios2/nios_linux.c
@@ -31,7 +31,7 @@ void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 		ulong addr, ulong *len_ptr, int   verify)
 {
 	image_header_t *hdr = &header;
-	void (*kernel)(void) = (void (*)(void))ntohl (hdr->ih_ep);
+	void (*kernel)(void) = (void (*)(void))image_get_ep (hdr);
 
 	/* For now we assume the Microtronix linux ... which only
 	 * needs to be called ;-)
diff --git a/tools/Makefile b/tools/Makefile
index af0de47..cbfca6d 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -23,7 +23,7 @@
 
 BIN_FILES	= img2srec$(SFX) mkimage$(SFX) envcrc$(SFX) ubsha1$(SFX) gen_eth_addr$(SFX) bmp_logo$(SFX)
 
-OBJ_LINKS	= environment.o crc32.o sha1.o
+OBJ_LINKS	= environment.o crc32.o sha1.o image.o
 OBJ_FILES	= img2srec.o mkimage.o envcrc.o ubsha1.o gen_eth_addr.o bmp_logo.o
 
 ifeq ($(ARCH),mips)
@@ -137,7 +137,7 @@ $(obj)img2srec$(SFX):	$(obj)img2srec.o
 		$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
 		$(STRIP) $@
 
-$(obj)mkimage$(SFX):	$(obj)mkimage.o $(obj)crc32.o
+$(obj)mkimage$(SFX):	$(obj)mkimage.o $(obj)crc32.o $(obj)image.o
 		$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
 		$(STRIP) $@
 
@@ -173,6 +173,9 @@ $(obj)crc32.o:	$(obj)crc32.c
 $(obj)sha1.o:	$(obj)sha1.c
 		$(CC) -g $(CFLAGS) -c -o $@ $<
 
+$(obj)image.o:	$(obj)image.c
+		$(CC) -g $(CFLAGS) -c -o $@ $<
+
 $(obj)mkimage.o:	$(src)mkimage.c
 		$(CC) -g $(CFLAGS) -c -o $@ $<
 
@@ -217,6 +220,10 @@ $(obj)sha1.c:
 		@rm -f $(obj)sha1.c
 		ln -s $(src)../lib_generic/sha1.c $(obj)sha1.c
 
+$(obj)image.c:
+		@rm -f $(obj)image.c
+		ln -s $(src)../common/image.c $(obj)image.c
+
 $(LOGO_H):	$(obj)bmp_logo $(LOGO_BMP)
 		$(obj)./bmp_logo $(LOGO_BMP) >$@
 
diff --git a/tools/mkimage.c b/tools/mkimage.c
index 2125130..8ced970 100644
--- a/tools/mkimage.c
+++ b/tools/mkimage.c
@@ -20,44 +20,7 @@
  * MA 02111-1307 USA
  */
 
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#ifndef __WIN32__
-#include <netinet/in.h>		/* for host / network byte order conversions	*/
-#endif
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <time.h>
-#include <unistd.h>
-
-#if defined(__BEOS__) || defined(__NetBSD__) || defined(__APPLE__)
-#include <inttypes.h>
-#endif
-
-#ifdef __WIN32__
-typedef unsigned int __u32;
-
-#define SWAP_LONG(x) \
-	((__u32)( \
-		(((__u32)(x) & (__u32)0x000000ffUL) << 24) | \
-		(((__u32)(x) & (__u32)0x0000ff00UL) <<  8) | \
-		(((__u32)(x) & (__u32)0x00ff0000UL) >>  8) | \
-		(((__u32)(x) & (__u32)0xff000000UL) >> 24) ))
-typedef		unsigned char	uint8_t;
-typedef		unsigned short	uint16_t;
-typedef		unsigned int	uint32_t;
-
-#define     ntohl(a)	SWAP_LONG(a)
-#define     htonl(a)	SWAP_LONG(a)
-#endif	/* __WIN32__ */
-
-#ifndef	O_BINARY		/* should be define'd on __WIN32__ */
-#define O_BINARY	0
-#endif
-
+#include "mkimage.h"
 #include <image.h>
 
 extern int errno;
@@ -77,24 +40,24 @@ typedef struct table_entry {
 } table_entry_t;
 
 table_entry_t arch_name[] = {
-    {	IH_CPU_INVALID,		NULL,		"Invalid CPU",	},
-    {	IH_CPU_ALPHA,		"alpha",	"Alpha",	},
-    {	IH_CPU_ARM,		"arm",		"ARM",		},
-    {	IH_CPU_I386,		"x86",		"Intel x86",	},
-    {	IH_CPU_IA64,		"ia64",		"IA64",		},
-    {	IH_CPU_M68K,		"m68k",		"MC68000",	},
-    {	IH_CPU_MICROBLAZE,	"microblaze",	"MicroBlaze",	},
-    {	IH_CPU_MIPS,		"mips",		"MIPS",		},
-    {	IH_CPU_MIPS64,		"mips64",	"MIPS 64 Bit",	},
-    {	IH_CPU_NIOS,		"nios",		"NIOS",		},
-    {	IH_CPU_NIOS2,		"nios2",	"NIOS II",	},
-    {	IH_CPU_PPC,		"ppc",		"PowerPC",	},
-    {	IH_CPU_S390,		"s390",		"IBM S390",	},
-    {	IH_CPU_SH,		"sh",		"SuperH",	},
-    {	IH_CPU_SPARC,		"sparc",	"SPARC",	},
-    {	IH_CPU_SPARC64,		"sparc64",	"SPARC 64 Bit",	},
-    {	IH_CPU_BLACKFIN,	"blackfin",	"Blackfin",	},
-    {	IH_CPU_AVR32,		"avr32",	"AVR32",	},
+    {	IH_ARCH_INVALID,	NULL,		"Invalid CPU",	},
+    {	IH_ARCH_ALPHA,		"alpha",	"Alpha",	},
+    {	IH_ARCH_ARM,		"arm",		"ARM",		},
+    {	IH_ARCH_I386,		"x86",		"Intel x86",	},
+    {	IH_ARCH_IA64,		"ia64",		"IA64",		},
+    {	IH_ARCH_M68K,		"m68k",		"MC68000",	},
+    {	IH_ARCH_MICROBLAZE,	"microblaze",	"MicroBlaze",	},
+    {	IH_ARCH_MIPS,		"mips",		"MIPS",		},
+    {	IH_ARCH_MIPS64,		"mips64",	"MIPS 64 Bit",	},
+    {	IH_ARCH_NIOS,		"nios",		"NIOS",		},
+    {	IH_ARCH_NIOS2,		"nios2",	"NIOS II",	},
+    {	IH_ARCH_PPC,		"ppc",		"PowerPC",	},
+    {	IH_ARCH_S390,		"s390",		"IBM S390",	},
+    {	IH_ARCH_SH,		"sh",		"SuperH",	},
+    {	IH_ARCH_SPARC,		"sparc",	"SPARC",	},
+    {	IH_ARCH_SPARC64,	"sparc64",	"SPARC 64 Bit",	},
+    {	IH_ARCH_BLACKFIN,	"blackfin",	"Blackfin",	},
+    {	IH_ARCH_AVR32,		"avr32",	"AVR32",	},
     {	-1,			"",		"",		},
 };
 
@@ -167,7 +130,7 @@ int lflag    = 0;
 int vflag    = 0;
 int xflag    = 0;
 int opt_os   = IH_OS_LINUX;
-int opt_arch = IH_CPU_PPC;
+int opt_arch = IH_ARCH_PPC;
 int opt_type = IH_TYPE_KERNEL;
 int opt_comp = IH_COMP_GZIP;
 
@@ -270,7 +233,7 @@ NXTARG:		;
 		ep = addr;
 		/* If XIP, entry point must be after the U-Boot header */
 		if (xflag)
-			ep += sizeof(image_header_t);
+			ep += image_get_header_size ();
 	}
 
 	/*
@@ -278,11 +241,11 @@ NXTARG:		;
 	 * the size of the U-Boot header.
 	 */
 	if (xflag) {
-		if (ep != addr + sizeof(image_header_t)) {
+		if (ep != addr + image_get_header_size ()) {
 			fprintf (stderr,
 				"%s: For XIP, the entry point must be the load addr + %lu\n",
 				cmdname,
-				(unsigned long)sizeof(image_header_t));
+				(unsigned long)image_get_header_size ());
 			exit (EXIT_FAILURE);
 		}
 	}
@@ -313,7 +276,7 @@ NXTARG:		;
 			exit (EXIT_FAILURE);
 		}
 
-		if ((unsigned)sbuf.st_size < sizeof(image_header_t)) {
+		if ((unsigned)sbuf.st_size < image_get_header_size ()) {
 			fprintf (stderr,
 				"%s: Bad size: \"%s\" is no valid image\n",
 				cmdname, imagefile);
@@ -329,36 +292,30 @@ NXTARG:		;
 		}
 
 		/*
-		 * create copy of header so that we can blank out the
-		 * checksum field for checking - this can't be done
-		 * on the PROT_READ mapped data.
+		 * image_check_hcrc() creates copy of header so that
+		 * we can blank out the checksum field for checking -
+		 * this can't be done on the PROT_READ mapped data.
 		 */
-		memcpy (hdr, ptr, sizeof(image_header_t));
+		hdr = (image_header_t *)ptr;
 
-		if (ntohl(hdr->ih_magic) != IH_MAGIC) {
+		if (!image_check_magic (hdr)) {
 			fprintf (stderr,
 				"%s: Bad Magic Number: \"%s\" is no valid image\n",
 				cmdname, imagefile);
 			exit (EXIT_FAILURE);
 		}
 
-		data = (char *)hdr;
-		len  = sizeof(image_header_t);
-
-		checksum = ntohl(hdr->ih_hcrc);
-		hdr->ih_hcrc = htonl(0);	/* clear for re-calculation */
-
-		if (crc32 (0, data, len) != checksum) {
+		if (!image_check_hcrc (hdr)) {
 			fprintf (stderr,
 				"%s: ERROR: \"%s\" has bad header checksum!\n",
 				cmdname, imagefile);
 			exit (EXIT_FAILURE);
 		}
 
-		data = (char *)(ptr + sizeof(image_header_t));
-		len  = sbuf.st_size - sizeof(image_header_t) ;
+		data = (char *)image_get_data (hdr);
+		len  = sbuf.st_size - image_get_header_size ();
 
-		if (crc32 (0, data, len) != ntohl(hdr->ih_dcrc)) {
+		if (crc32(0, data, len) != image_get_dcrc (hdr)) {
 			fprintf (stderr,
 				"%s: ERROR: \"%s\" has corrupted data!\n",
 				cmdname, imagefile);
@@ -379,9 +336,9 @@ NXTARG:		;
 	 *
 	 * write dummy header, to be fixed later
 	 */
-	memset (hdr, 0, sizeof(image_header_t));
+	memset (hdr, 0, image_get_header_size ());
 
-	if (write(ifd, hdr, sizeof(image_header_t)) != sizeof(image_header_t)) {
+	if (write(ifd, hdr, image_get_header_size ()) != image_get_header_size ()) {
 		fprintf (stderr, "%s: Write error on %s: %s\n",
 			cmdname, imagefile, strerror(errno));
 		exit (EXIT_FAILURE);
@@ -404,7 +361,7 @@ NXTARG:		;
 						cmdname, file, strerror(errno));
 					exit (EXIT_FAILURE);
 				}
-				size = htonl(sbuf.st_size);
+				size = cpu_to_image (sbuf.st_size);
 			} else {
 				size = 0;
 			}
@@ -469,27 +426,27 @@ NXTARG:		;
 	hdr = (image_header_t *)ptr;
 
 	checksum = crc32 (0,
-			  (const char *)(ptr + sizeof(image_header_t)),
-			  sbuf.st_size - sizeof(image_header_t)
+			  (const char *)(ptr + image_get_header_size ()),
+			  sbuf.st_size - image_get_header_size ()
 			 );
 
 	/* Build new header */
-	hdr->ih_magic = htonl(IH_MAGIC);
-	hdr->ih_time  = htonl(sbuf.st_mtime);
-	hdr->ih_size  = htonl(sbuf.st_size - sizeof(image_header_t));
-	hdr->ih_load  = htonl(addr);
-	hdr->ih_ep    = htonl(ep);
-	hdr->ih_dcrc  = htonl(checksum);
-	hdr->ih_os    = opt_os;
-	hdr->ih_arch  = opt_arch;
-	hdr->ih_type  = opt_type;
-	hdr->ih_comp  = opt_comp;
+	image_set_magic (hdr, IH_MAGIC);
+	image_set_time (hdr, sbuf.st_mtime);
+	image_set_size (hdr, sbuf.st_size - image_get_header_size ());
+	image_set_load (hdr, addr);
+	image_set_ep (hdr, ep);
+	image_set_dcrc (hdr, checksum);
+	image_set_os (hdr, opt_os);
+	image_set_arch (hdr, opt_arch);
+	image_set_type (hdr, opt_type);
+	image_set_comp (hdr, opt_comp);
 
-	strncpy((char *)hdr->ih_name, name, IH_NMLEN);
+	image_set_name (hdr, name);
 
-	checksum = crc32(0,(const char *)hdr,sizeof(image_header_t));
+	checksum = crc32 (0, (const char *)hdr, image_get_header_size ());
 
-	hdr->ih_hcrc = htonl(checksum);
+	image_set_hcrc (hdr, checksum);
 
 	print_header (hdr);
 
@@ -554,14 +511,14 @@ copy_file (int ifd, const char *datafile, int pad)
 		 * reserved for it.
 		 */
 
-		if ((unsigned)sbuf.st_size < sizeof(image_header_t)) {
+		if ((unsigned)sbuf.st_size < image_get_header_size ()) {
 			fprintf (stderr,
 				"%s: Bad size: \"%s\" is too small for XIP\n",
 				cmdname, datafile);
 			exit (EXIT_FAILURE);
 		}
 
-		for (p=ptr; p < ptr+sizeof(image_header_t); p++) {
+		for (p = ptr; p < ptr + image_get_header_size (); p++) {
 			if ( *p != 0xff ) {
 				fprintf (stderr,
 					"%s: Bad file: \"%s\" has invalid buffer for XIP\n",
@@ -570,7 +527,7 @@ copy_file (int ifd, const char *datafile, int pad)
 			}
 		}
 
-		offset = sizeof(image_header_t);
+		offset = image_get_header_size ();
 	}
 
 	size = sbuf.st_size - offset;
@@ -620,22 +577,23 @@ print_header (image_header_t *hdr)
 	time_t timestamp;
 	uint32_t size;
 
-	timestamp = (time_t)ntohl(hdr->ih_time);
-	size = ntohl(hdr->ih_size);
+	timestamp = (time_t)image_get_time (hdr);
+	size = image_get_data_size (hdr);
 
-	printf ("Image Name:   %.*s\n", IH_NMLEN, hdr->ih_name);
+	printf ("Image Name:   %.*s\n", IH_NMLEN, image_get_name (hdr));
 	printf ("Created:      %s", ctime(&timestamp));
 	printf ("Image Type:   "); print_type(hdr);
 	printf ("Data Size:    %d Bytes = %.2f kB = %.2f MB\n",
 		size, (double)size / 1.024e3, (double)size / 1.048576e6 );
-	printf ("Load Address: 0x%08X\n", ntohl(hdr->ih_load));
-	printf ("Entry Point:  0x%08X\n", ntohl(hdr->ih_ep));
+	printf ("Load Address: 0x%08X\n", image_get_load (hdr));
+	printf ("Entry Point:  0x%08X\n", image_get_ep (hdr));
 
-	if (hdr->ih_type == IH_TYPE_MULTI || hdr->ih_type == IH_TYPE_SCRIPT) {
+	if (image_check_type (hdr, IH_TYPE_MULTI) ||
+			image_check_type (hdr, IH_TYPE_SCRIPT)) {
 		int i, ptrs;
 		uint32_t pos;
 		uint32_t *len_ptr = (uint32_t *) (
-					(unsigned long)hdr + sizeof(image_header_t)
+					(unsigned long)hdr + image_get_header_size ()
 				);
 
 		/* determine number of images first (to calculate image offsets) */
@@ -643,14 +601,14 @@ print_header (image_header_t *hdr)
 			;
 		ptrs = i;		/* null pointer terminates list */
 
-		pos = sizeof(image_header_t) + ptrs * sizeof(long);
+		pos = image_get_header_size () + ptrs * sizeof(long);
 		printf ("Contents:\n");
 		for (i=0; len_ptr[i]; ++i) {
-			size = ntohl(len_ptr[i]);
+			size = image_to_cpu (len_ptr[i]);
 
 			printf ("   Image %d: %8d Bytes = %4d kB = %d MB\n",
 				i, size, size>>10, size>>20);
-			if (hdr->ih_type == IH_TYPE_SCRIPT && i > 0) {
+			if (image_check_type (hdr, IH_TYPE_SCRIPT) && i > 0) {
 				/*
 				 * the user may need to know offsets
 				 * if planning to do something with
@@ -671,10 +629,10 @@ static void
 print_type (image_header_t *hdr)
 {
 	printf ("%s %s %s (%s)\n",
-		put_arch (hdr->ih_arch),
-		put_os   (hdr->ih_os  ),
-		put_type (hdr->ih_type),
-		put_comp (hdr->ih_comp)
+		put_arch (image_get_arch (hdr)),
+		put_os   (image_get_os (hdr)),
+		put_type (image_get_type (hdr)),
+		put_comp (image_get_comp (hdr))
 	);
 }
 
diff --git a/tools/mkimage.h b/tools/mkimage.h
new file mode 100644
index 0000000..8b05bb1
--- /dev/null
+++ b/tools/mkimage.h
@@ -0,0 +1,59 @@
+/*
+ * (C) Copyright 2000-2004
+ * DENX Software Engineering
+ * Wolfgang Denk, wd@denx.de
+ * All rights reserved.
+ *
+ * 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
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifndef __WIN32__
+#include <netinet/in.h>		/* for host / network byte order conversions	*/
+#endif
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <time.h>
+#include <unistd.h>
+
+#if defined(__BEOS__) || defined(__NetBSD__) || defined(__APPLE__)
+#include <inttypes.h>
+#endif
+
+#ifdef __WIN32__
+typedef unsigned int __u32;
+
+#define SWAP_LONG(x) \
+	((__u32)( \
+		(((__u32)(x) & (__u32)0x000000ffUL) << 24) | \
+		(((__u32)(x) & (__u32)0x0000ff00UL) <<  8) | \
+		(((__u32)(x) & (__u32)0x00ff0000UL) >>  8) | \
+		(((__u32)(x) & (__u32)0xff000000UL) >> 24) ))
+typedef		unsigned char	uint8_t;
+typedef		unsigned short	uint16_t;
+typedef		unsigned int	uint32_t;
+
+#define     ntohl(a)	SWAP_LONG(a)
+#define     htonl(a)	SWAP_LONG(a)
+#endif	/* __WIN32__ */
+
+#ifndef	O_BINARY		/* should be define'd on __WIN32__ */
+#define O_BINARY	0
+#endif