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cmd_mem.c

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    cmd_mem.c 29.34 KiB
    /*
     * (C) Copyright 2000
     * 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
     */
    
    /*
     * Memory Functions
     *
     * Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
     */
    
    #include <common.h>
    #include <command.h>
    #ifdef CONFIG_HAS_DATAFLASH
    #include <dataflash.h>
    #endif
    #include <watchdog.h>
    
    #include <u-boot/md5.h>
    #include <sha1.h>
    
    #ifdef	CMD_MEM_DEBUG
    #define	PRINTF(fmt,args...)	printf (fmt ,##args)
    #else
    #define PRINTF(fmt,args...)
    #endif
    
    static int mod_mem(cmd_tbl_t *, int, int, int, char * const []);
    
    /* Display values from last command.
     * Memory modify remembered values are different from display memory.
     */
    uint	dp_last_addr, dp_last_size;
    uint	dp_last_length = 0x40;
    uint	mm_last_addr, mm_last_size;
    
    static	ulong	base_address = 0;
    
    /* Memory Display
     *
     * Syntax:
     *	md{.b, .w, .l} {addr} {len}
     */
    #define DISP_LINE_LEN	16
    int do_mem_md ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	ulong	addr, length;
    #if defined(CONFIG_HAS_DATAFLASH)
    	ulong	nbytes, linebytes;
    #endif
    	int	size;
    	int rc = 0;
    
    	/* We use the last specified parameters, unless new ones are
    	 * entered.
    	 */
    	addr = dp_last_addr;
    	size = dp_last_size;
    	length = dp_last_length;
    
    	if (argc < 2)
    		return cmd_usage(cmdtp);
    
    	if ((flag & CMD_FLAG_REPEAT) == 0) {
    		/* New command specified.  Check for a size specification.
    		 * Defaults to long if no or incorrect specification.
    		 */
    		if ((size = cmd_get_data_size(argv[0], 4)) < 0)
    			return 1;
    
    		/* Address is specified since argc > 1
    		*/
    		addr = simple_strtoul(argv[1], NULL, 16);
    		addr += base_address;
    
    		/* If another parameter, it is the length to display.
    		 * Length is the number of objects, not number of bytes.
    		 */
    		if (argc > 2)
    			length = simple_strtoul(argv[2], NULL, 16);
    	}
    
    #if defined(CONFIG_HAS_DATAFLASH)
    	/* Print the lines.
    	 *
    	 * We buffer all read data, so we can make sure data is read only
    	 * once, and all accesses are with the specified bus width.
    	 */
    	nbytes = length * size;
    	do {
    		char	linebuf[DISP_LINE_LEN];
    		void* p;
    		linebytes = (nbytes>DISP_LINE_LEN)?DISP_LINE_LEN:nbytes;
    
    		rc = read_dataflash(addr, (linebytes/size)*size, linebuf);
    		p = (rc == DATAFLASH_OK) ? linebuf : (void*)addr;
    		print_buffer(addr, p, size, linebytes/size, DISP_LINE_LEN/size);
    
    		nbytes -= linebytes;
    		addr += linebytes;
    		if (ctrlc()) {
    			rc = 1;
    			break;
    		}
    	} while (nbytes > 0);
    #else
    
    # if defined(CONFIG_BLACKFIN)
    	/* See if we're trying to display L1 inst */
    	if (addr_bfin_on_chip_mem(addr)) {
    		char linebuf[DISP_LINE_LEN];
    		ulong linebytes, nbytes = length * size;
    		do {
    			linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
    			memcpy(linebuf, (void *)addr, linebytes);
    			print_buffer(addr, linebuf, size, linebytes/size, DISP_LINE_LEN/size);
    
    			nbytes -= linebytes;
    			addr += linebytes;
    			if (ctrlc()) {
    				rc = 1;
    				break;
    			}
    		} while (nbytes > 0);
    	} else
    # endif
    
    	{
    		/* Print the lines. */
    		print_buffer(addr, (void*)addr, size, length, DISP_LINE_LEN/size);
    		addr += size*length;
    	}
    #endif
    
    	dp_last_addr = addr;
    	dp_last_length = length;
    	dp_last_size = size;
    	return (rc);
    }
    
    int do_mem_mm ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	return mod_mem (cmdtp, 1, flag, argc, argv);
    }
    int do_mem_nm ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	return mod_mem (cmdtp, 0, flag, argc, argv);
    }
    
    int do_mem_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	ulong	addr, writeval, count;
    	int	size;
    
    	if ((argc < 3) || (argc > 4))
    		return cmd_usage(cmdtp);
    
    	/* Check for size specification.
    	*/
    	if ((size = cmd_get_data_size(argv[0], 4)) < 1)
    		return 1;
    
    	/* Address is specified since argc > 1
    	*/
    	addr = simple_strtoul(argv[1], NULL, 16);
    	addr += base_address;
    
    	/* Get the value to write.
    	*/
    	writeval = simple_strtoul(argv[2], NULL, 16);
    
    	/* Count ? */
    	if (argc == 4) {
    		count = simple_strtoul(argv[3], NULL, 16);
    	} else {
    		count = 1;
    	}
    
    	while (count-- > 0) {
    		if (size == 4)
    			*((ulong  *)addr) = (ulong )writeval;
    		else if (size == 2)
    			*((ushort *)addr) = (ushort)writeval;
    		else
    			*((u_char *)addr) = (u_char)writeval;
    		addr += size;
    	}
    	return 0;
    }
    
    #ifdef CONFIG_MX_CYCLIC
    int do_mem_mdc ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	int i;
    	ulong count;
    
    	if (argc < 4)
    		return cmd_usage(cmdtp);
    
    	count = simple_strtoul(argv[3], NULL, 10);
    
    	for (;;) {
    		do_mem_md (NULL, 0, 3, argv);
    
    		/* delay for <count> ms... */
    		for (i=0; i<count; i++)
    			udelay (1000);
    
    		/* check for ctrl-c to abort... */
    		if (ctrlc()) {
    			puts("Abort\n");
    			return 0;
    		}
    	}
    
    	return 0;
    }
    
    int do_mem_mwc ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	int i;
    	ulong count;
    
    	if (argc < 4)
    		return cmd_usage(cmdtp);
    
    	count = simple_strtoul(argv[3], NULL, 10);
    
    	for (;;) {
    		do_mem_mw (NULL, 0, 3, argv);
    
    		/* delay for <count> ms... */
    		for (i=0; i<count; i++)
    			udelay (1000);
    
    		/* check for ctrl-c to abort... */
    		if (ctrlc()) {
    			puts("Abort\n");
    			return 0;
    		}
    	}
    
    	return 0;
    }
    #endif /* CONFIG_MX_CYCLIC */
    
    int do_mem_cmp (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	ulong	addr1, addr2, count, ngood;
    	int	size;
    	int     rcode = 0;
    
    	if (argc != 4)
    		return cmd_usage(cmdtp);
    
    	/* Check for size specification.
    	*/
    	if ((size = cmd_get_data_size(argv[0], 4)) < 0)
    		return 1;
    
    	addr1 = simple_strtoul(argv[1], NULL, 16);
    	addr1 += base_address;
    
    	addr2 = simple_strtoul(argv[2], NULL, 16);
    	addr2 += base_address;
    
    	count = simple_strtoul(argv[3], NULL, 16);
    
    #ifdef CONFIG_HAS_DATAFLASH
    	if (addr_dataflash(addr1) | addr_dataflash(addr2)){
    		puts ("Comparison with DataFlash space not supported.\n\r");
    		return 0;
    	}
    #endif
    
    #ifdef CONFIG_BLACKFIN
    	if (addr_bfin_on_chip_mem(addr1) || addr_bfin_on_chip_mem(addr2)) {
    		puts ("Comparison with L1 instruction memory not supported.\n\r");
    		return 0;
    	}
    #endif
    
    	ngood = 0;
    
    	while (count-- > 0) {
    		if (size == 4) {
    			ulong word1 = *(ulong *)addr1;
    			ulong word2 = *(ulong *)addr2;
    			if (word1 != word2) {
    				printf("word at 0x%08lx (0x%08lx) "
    					"!= word at 0x%08lx (0x%08lx)\n",
    					addr1, word1, addr2, word2);
    				rcode = 1;
    				break;
    			}
    		}
    		else if (size == 2) {
    			ushort hword1 = *(ushort *)addr1;
    			ushort hword2 = *(ushort *)addr2;
    			if (hword1 != hword2) {
    				printf("halfword at 0x%08lx (0x%04x) "
    					"!= halfword at 0x%08lx (0x%04x)\n",
    					addr1, hword1, addr2, hword2);
    				rcode = 1;
    				break;
    			}
    		}
    		else {
    			u_char byte1 = *(u_char *)addr1;
    			u_char byte2 = *(u_char *)addr2;
    			if (byte1 != byte2) {
    				printf("byte at 0x%08lx (0x%02x) "
    					"!= byte at 0x%08lx (0x%02x)\n",
    					addr1, byte1, addr2, byte2);
    				rcode = 1;
    				break;
    			}
    		}
    		ngood++;
    		addr1 += size;
    		addr2 += size;
    
    		/* reset watchdog from time to time */
    		if ((count % (64 << 10)) == 0)
    			WATCHDOG_RESET();
    	}
    
    	printf("Total of %ld %s%s were the same\n",
    		ngood, size == 4 ? "word" : size == 2 ? "halfword" : "byte",
    		ngood == 1 ? "" : "s");
    	return rcode;
    }
    
    int do_mem_cp ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	ulong	addr, dest, count;
    	int	size;
    
    	if (argc != 4)
    		return cmd_usage(cmdtp);
    
    	/* Check for size specification.
    	*/
    	if ((size = cmd_get_data_size(argv[0], 4)) < 0)
    		return 1;
    
    	addr = simple_strtoul(argv[1], NULL, 16);
    	addr += base_address;
    
    	dest = simple_strtoul(argv[2], NULL, 16);
    	dest += base_address;
    
    	count = simple_strtoul(argv[3], NULL, 16);
    
    	if (count == 0) {
    		puts ("Zero length ???\n");
    		return 1;
    	}
    
    #ifndef CONFIG_SYS_NO_FLASH
    	/* check if we are copying to Flash */
    	if ( (addr2info(dest) != NULL)
    #ifdef CONFIG_HAS_DATAFLASH
    	   && (!addr_dataflash(dest))
    #endif
    	   ) {
    		int rc;
    
    		puts ("Copy to Flash... ");
    
    		rc = flash_write ((char *)addr, dest, count*size);
    		if (rc != 0) {
    			flash_perror (rc);
    			return (1);
    		}
    		puts ("done\n");
    		return 0;
    	}
    #endif
    
    #ifdef CONFIG_HAS_DATAFLASH
    	/* Check if we are copying from RAM or Flash to DataFlash */
    	if (addr_dataflash(dest) && !addr_dataflash(addr)){
    		int rc;
    
    		puts ("Copy to DataFlash... ");
    
    		rc = write_dataflash (dest, addr, count*size);
    
    		if (rc != 1) {
    			dataflash_perror (rc);
    			return (1);
    		}
    		puts ("done\n");
    		return 0;
    	}
    
    	/* Check if we are copying from DataFlash to RAM */
    	if (addr_dataflash(addr) && !addr_dataflash(dest)
    #ifndef CONFIG_SYS_NO_FLASH
    				 && (addr2info(dest) == NULL)
    #endif
    	   ){
    		int rc;
    		rc = read_dataflash(addr, count * size, (char *) dest);
    		if (rc != 1) {
    			dataflash_perror (rc);
    			return (1);
    		}
    		return 0;
    	}
    
    	if (addr_dataflash(addr) && addr_dataflash(dest)){
    		puts ("Unsupported combination of source/destination.\n\r");
    		return 1;
    	}
    #endif
    
    #ifdef CONFIG_BLACKFIN
    	/* See if we're copying to/from L1 inst */
    	if (addr_bfin_on_chip_mem(dest) || addr_bfin_on_chip_mem(addr)) {
    		memcpy((void *)dest, (void *)addr, count * size);
    		return 0;
    	}
    #endif
    
    	while (count-- > 0) {
    		if (size == 4)
    			*((ulong  *)dest) = *((ulong  *)addr);
    		else if (size == 2)
    			*((ushort *)dest) = *((ushort *)addr);
    		else
    			*((u_char *)dest) = *((u_char *)addr);
    		addr += size;
    		dest += size;
    
    		/* reset watchdog from time to time */
    		if ((count % (64 << 10)) == 0)
    			WATCHDOG_RESET();
    	}
    	return 0;
    }
    
    int do_mem_base (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	if (argc > 1) {
    		/* Set new base address.
    		*/
    		base_address = simple_strtoul(argv[1], NULL, 16);
    	}
    	/* Print the current base address.
    	*/
    	printf("Base Address: 0x%08lx\n", base_address);
    	return 0;
    }
    
    int do_mem_loop (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	ulong	addr, length, i, junk;
    	int	size;
    	volatile uint	*longp;
    	volatile ushort *shortp;
    	volatile u_char	*cp;
    
    	if (argc < 3)
    		return cmd_usage(cmdtp);
    
    	/* Check for a size spefication.
    	 * Defaults to long if no or incorrect specification.
    	 */
    	if ((size = cmd_get_data_size(argv[0], 4)) < 0)
    		return 1;
    
    	/* Address is always specified.
    	*/
    	addr = simple_strtoul(argv[1], NULL, 16);
    
    	/* Length is the number of objects, not number of bytes.
    	*/
    	length = simple_strtoul(argv[2], NULL, 16);
    
    	/* We want to optimize the loops to run as fast as possible.
    	 * If we have only one object, just run infinite loops.
    	 */
    	if (length == 1) {
    		if (size == 4) {
    			longp = (uint *)addr;
    			for (;;)
    				i = *longp;
    		}
    		if (size == 2) {
    			shortp = (ushort *)addr;
    			for (;;)
    				i = *shortp;
    		}
    		cp = (u_char *)addr;
    		for (;;)
    			i = *cp;
    	}
    
    	if (size == 4) {
    		for (;;) {
    			longp = (uint *)addr;
    			i = length;
    			while (i-- > 0)
    				junk = *longp++;
    		}
    	}
    	if (size == 2) {
    		for (;;) {
    			shortp = (ushort *)addr;
    			i = length;
    			while (i-- > 0)
    				junk = *shortp++;
    		}
    	}
    	for (;;) {
    		cp = (u_char *)addr;
    		i = length;
    		while (i-- > 0)
    			junk = *cp++;
    	}
    }
    
    #ifdef CONFIG_LOOPW
    int do_mem_loopw (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	ulong	addr, length, i, data;
    	int	size;
    	volatile uint	*longp;
    	volatile ushort *shortp;
    	volatile u_char	*cp;
    
    	if (argc < 4)
    		return cmd_usage(cmdtp);
    
    	/* Check for a size spefication.
    	 * Defaults to long if no or incorrect specification.
    	 */
    	if ((size = cmd_get_data_size(argv[0], 4)) < 0)
    		return 1;
    
    	/* Address is always specified.
    	*/
    	addr = simple_strtoul(argv[1], NULL, 16);
    
    	/* Length is the number of objects, not number of bytes.
    	*/
    	length = simple_strtoul(argv[2], NULL, 16);
    
    	/* data to write */
    	data = simple_strtoul(argv[3], NULL, 16);
    
    	/* We want to optimize the loops to run as fast as possible.
    	 * If we have only one object, just run infinite loops.
    	 */
    	if (length == 1) {
    		if (size == 4) {
    			longp = (uint *)addr;
    			for (;;)
    				*longp = data;
    					}
    		if (size == 2) {
    			shortp = (ushort *)addr;
    			for (;;)
    				*shortp = data;
    		}
    		cp = (u_char *)addr;
    		for (;;)
    			*cp = data;
    	}
    
    	if (size == 4) {
    		for (;;) {
    			longp = (uint *)addr;
    			i = length;
    			while (i-- > 0)
    				*longp++ = data;
    		}
    	}
    	if (size == 2) {
    		for (;;) {
    			shortp = (ushort *)addr;
    			i = length;
    			while (i-- > 0)
    				*shortp++ = data;
    		}
    	}
    	for (;;) {
    		cp = (u_char *)addr;
    		i = length;
    		while (i-- > 0)
    			*cp++ = data;
    	}
    }
    #endif /* CONFIG_LOOPW */
    
    /*
     * Perform a memory test. A more complete alternative test can be
     * configured using CONFIG_SYS_ALT_MEMTEST. The complete test loops until
     * interrupted by ctrl-c or by a failure of one of the sub-tests.
     */
    int do_mem_mtest (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	vu_long	*addr, *start, *end;
    	ulong	val;
    	ulong	readback;
    	ulong	errs = 0;
    	int iterations = 1;
    	int iteration_limit;
    
    #if defined(CONFIG_SYS_ALT_MEMTEST)
    	vu_long	len;
    	vu_long	offset;
    	vu_long	test_offset;
    	vu_long	pattern;
    	vu_long	temp;
    	vu_long	anti_pattern;
    	vu_long	num_words;
    #if defined(CONFIG_SYS_MEMTEST_SCRATCH)
    	vu_long *dummy = (vu_long*)CONFIG_SYS_MEMTEST_SCRATCH;
    #else
    	vu_long *dummy = 0;	/* yes, this is address 0x0, not NULL */
    #endif
    	int	j;
    
    	static const ulong bitpattern[] = {
    		0x00000001,	/* single bit */
    		0x00000003,	/* two adjacent bits */
    		0x00000007,	/* three adjacent bits */
    		0x0000000F,	/* four adjacent bits */
    		0x00000005,	/* two non-adjacent bits */
    		0x00000015,	/* three non-adjacent bits */
    		0x00000055,	/* four non-adjacent bits */
    		0xaaaaaaaa,	/* alternating 1/0 */
    	};
    #else
    	ulong	incr;
    	ulong	pattern;
    #endif
    
    	if (argc > 1)
    		start = (ulong *)simple_strtoul(argv[1], NULL, 16);
    	else
    		start = (ulong *)CONFIG_SYS_MEMTEST_START;
    
    	if (argc > 2)
    		end = (ulong *)simple_strtoul(argv[2], NULL, 16);
    	else
    		end = (ulong *)(CONFIG_SYS_MEMTEST_END);
    
    	if (argc > 3)
    		pattern = (ulong)simple_strtoul(argv[3], NULL, 16);
    	else
    		pattern = 0;
    
    	if (argc > 4)
    		iteration_limit = (ulong)simple_strtoul(argv[4], NULL, 16);
    	else
    		iteration_limit = 0;
    
    #if defined(CONFIG_SYS_ALT_MEMTEST)
    	printf ("Testing %08x ... %08x:\n", (uint)start, (uint)end);
    	PRINTF("%s:%d: start 0x%p end 0x%p\n",
    		__FUNCTION__, __LINE__, start, end);
    
    	for (;;) {
    		if (ctrlc()) {
    			putc ('\n');
    			return 1;
    		}
    
    
    		if (iteration_limit && iterations > iteration_limit) {
    			printf("Tested %d iteration(s) with %lu errors.\n",
    				iterations-1, errs);
    			return errs != 0;
    		}
    
    		printf("Iteration: %6d\r", iterations);
    		PRINTF("\n");
    		iterations++;
    
    		/*
    		 * Data line test: write a pattern to the first
    		 * location, write the 1's complement to a 'parking'
    		 * address (changes the state of the data bus so a
    		 * floating bus doen't give a false OK), and then
    		 * read the value back. Note that we read it back
    		 * into a variable because the next time we read it,
    		 * it might be right (been there, tough to explain to
    		 * the quality guys why it prints a failure when the
    		 * "is" and "should be" are obviously the same in the
    		 * error message).
    		 *
    		 * Rather than exhaustively testing, we test some
    		 * patterns by shifting '1' bits through a field of
    		 * '0's and '0' bits through a field of '1's (i.e.
    		 * pattern and ~pattern).
    		 */
    		addr = start;
    		for (j = 0; j < sizeof(bitpattern)/sizeof(bitpattern[0]); j++) {
    		    val = bitpattern[j];
    		    for(; val != 0; val <<= 1) {
    			*addr  = val;
    			*dummy  = ~val; /* clear the test data off of the bus */
    			readback = *addr;
    			if(readback != val) {
    			    printf ("FAILURE (data line): "
    				"expected %08lx, actual %08lx\n",
    					  val, readback);
    			    errs++;
    			    if (ctrlc()) {
    				putc ('\n');
    				return 1;
    			    }
    			}
    			*addr  = ~val;
    			*dummy  = val;
    			readback = *addr;
    			if(readback != ~val) {
    			    printf ("FAILURE (data line): "
    				"Is %08lx, should be %08lx\n",
    					readback, ~val);
    			    errs++;
    			    if (ctrlc()) {
    				putc ('\n');
    				return 1;
    			    }
    			}
    		    }
    		}
    
    		/*
    		 * Based on code whose Original Author and Copyright
    		 * information follows: Copyright (c) 1998 by Michael
    		 * Barr. This software is placed into the public
    		 * domain and may be used for any purpose. However,
    		 * this notice must not be changed or removed and no
    		 * warranty is either expressed or implied by its
    		 * publication or distribution.
    		 */
    
    		/*
    		 * Address line test
    		 *
    		 * Description: Test the address bus wiring in a
    		 *              memory region by performing a walking
    		 *              1's test on the relevant bits of the
    		 *              address and checking for aliasing.
    		 *              This test will find single-bit
    		 *              address failures such as stuck -high,
    		 *              stuck-low, and shorted pins. The base
    		 *              address and size of the region are
    		 *              selected by the caller.
    		 *
    		 * Notes:	For best results, the selected base
    		 *              address should have enough LSB 0's to
    		 *              guarantee single address bit changes.
    		 *              For example, to test a 64-Kbyte
    		 *              region, select a base address on a
    		 *              64-Kbyte boundary. Also, select the
    		 *              region size as a power-of-two if at
    		 *              all possible.
    		 *
    		 * Returns:     0 if the test succeeds, 1 if the test fails.
    		 */
    		len = ((ulong)end - (ulong)start)/sizeof(vu_long);
    		pattern = (vu_long) 0xaaaaaaaa;
    		anti_pattern = (vu_long) 0x55555555;
    
    		PRINTF("%s:%d: length = 0x%.8lx\n",
    			__FUNCTION__, __LINE__,
    			len);
    		/*
    		 * Write the default pattern at each of the
    		 * power-of-two offsets.
    		 */
    		for (offset = 1; offset < len; offset <<= 1) {
    			start[offset] = pattern;
    		}
    
    		/*
    		 * Check for address bits stuck high.
    		 */
    		test_offset = 0;
    		start[test_offset] = anti_pattern;
    
    		for (offset = 1; offset < len; offset <<= 1) {
    		    temp = start[offset];
    		    if (temp != pattern) {
    			printf ("\nFAILURE: Address bit stuck high @ 0x%.8lx:"
    				" expected 0x%.8lx, actual 0x%.8lx\n",
    				(ulong)&start[offset], pattern, temp);
    			errs++;
    			if (ctrlc()) {
    			    putc ('\n');
    			    return 1;
    			}
    		    }
    		}
    		start[test_offset] = pattern;
    		WATCHDOG_RESET();
    
    		/*
    		 * Check for addr bits stuck low or shorted.
    		 */
    		for (test_offset = 1; test_offset < len; test_offset <<= 1) {
    		    start[test_offset] = anti_pattern;
    
    		    for (offset = 1; offset < len; offset <<= 1) {
    			temp = start[offset];
    			if ((temp != pattern) && (offset != test_offset)) {
    			    printf ("\nFAILURE: Address bit stuck low or shorted @"
    				" 0x%.8lx: expected 0x%.8lx, actual 0x%.8lx\n",
    				(ulong)&start[offset], pattern, temp);
    			    errs++;
    			    if (ctrlc()) {
    				putc ('\n');
    				return 1;
    			    }
    			}
    		    }
    		    start[test_offset] = pattern;
    		}
    
    		/*
    		 * Description: Test the integrity of a physical
    		 *		memory device by performing an
    		 *		increment/decrement test over the
    		 *		entire region. In the process every
    		 *		storage bit in the device is tested
    		 *		as a zero and a one. The base address
    		 *		and the size of the region are
    		 *		selected by the caller.
    		 *
    		 * Returns:     0 if the test succeeds, 1 if the test fails.
    		 */
    		num_words = ((ulong)end - (ulong)start)/sizeof(vu_long) + 1;
    
    		/*
    		 * Fill memory with a known pattern.
    		 */
    		for (pattern = 1, offset = 0; offset < num_words; pattern++, offset++) {
    			WATCHDOG_RESET();
    			start[offset] = pattern;
    		}
    
    		/*
    		 * Check each location and invert it for the second pass.
    		 */
    		for (pattern = 1, offset = 0; offset < num_words; pattern++, offset++) {
    		    WATCHDOG_RESET();
    		    temp = start[offset];
    		    if (temp != pattern) {
    			printf ("\nFAILURE (read/write) @ 0x%.8lx:"
    				" expected 0x%.8lx, actual 0x%.8lx)\n",
    				(ulong)&start[offset], pattern, temp);
    			errs++;
    			if (ctrlc()) {
    			    putc ('\n');
    			    return 1;
    			}
    		    }
    
    		    anti_pattern = ~pattern;
    		    start[offset] = anti_pattern;
    		}
    
    		/*
    		 * Check each location for the inverted pattern and zero it.
    		 */
    		for (pattern = 1, offset = 0; offset < num_words; pattern++, offset++) {
    		    WATCHDOG_RESET();
    		    anti_pattern = ~pattern;
    		    temp = start[offset];
    		    if (temp != anti_pattern) {
    			printf ("\nFAILURE (read/write): @ 0x%.8lx:"
    				" expected 0x%.8lx, actual 0x%.8lx)\n",
    				(ulong)&start[offset], anti_pattern, temp);
    			errs++;
    			if (ctrlc()) {
    			    putc ('\n');
    			    return 1;
    			}
    		    }
    		    start[offset] = 0;
    		}
    	}
    
    #else /* The original, quickie test */
    	incr = 1;
    	for (;;) {
    		if (ctrlc()) {
    			putc ('\n');
    			return 1;
    		}
    
    		if (iteration_limit && iterations > iteration_limit) {
    			printf("Tested %d iteration(s) with %lu errors.\n",
    				iterations-1, errs);
    			return errs != 0;
    		}
    		++iterations;
    
    		printf ("\rPattern %08lX  Writing..."
    			"%12s"
    			"\b\b\b\b\b\b\b\b\b\b",
    			pattern, "");
    
    		for (addr=start,val=pattern; addr<end; addr++) {
    			WATCHDOG_RESET();
    			*addr = val;
    			val  += incr;
    		}
    
    		puts ("Reading...");
    
    		for (addr=start,val=pattern; addr<end; addr++) {
    			WATCHDOG_RESET();
    			readback = *addr;
    			if (readback != val) {
    				printf ("\nMem error @ 0x%08X: "
    					"found %08lX, expected %08lX\n",
    					(uint)addr, readback, val);
    				errs++;
    				if (ctrlc()) {
    					putc ('\n');
    					return 1;
    				}
    			}
    			val += incr;
    		}
    
    		/*
    		 * Flip the pattern each time to make lots of zeros and
    		 * then, the next time, lots of ones.  We decrement
    		 * the "negative" patterns and increment the "positive"
    		 * patterns to preserve this feature.
    		 */
    		if(pattern & 0x80000000) {
    			pattern = -pattern;	/* complement & increment */
    		}
    		else {
    			pattern = ~pattern;
    		}
    		incr = -incr;
    	}
    #endif
    	return 0;	/* not reached */
    }
    
    
    /* Modify memory.
     *
     * Syntax:
     *	mm{.b, .w, .l} {addr}
     *	nm{.b, .w, .l} {addr}
     */
    static int
    mod_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char * const argv[])
    {
    	ulong	addr, i;
    	int	nbytes, size;
    	extern char console_buffer[];
    
    	if (argc != 2)
    		return cmd_usage(cmdtp);
    
    #ifdef CONFIG_BOOT_RETRY_TIME
    	reset_cmd_timeout();	/* got a good command to get here */
    #endif
    	/* We use the last specified parameters, unless new ones are
    	 * entered.
    	 */
    	addr = mm_last_addr;
    	size = mm_last_size;
    
    	if ((flag & CMD_FLAG_REPEAT) == 0) {
    		/* New command specified.  Check for a size specification.
    		 * Defaults to long if no or incorrect specification.
    		 */
    		if ((size = cmd_get_data_size(argv[0], 4)) < 0)
    			return 1;
    
    		/* Address is specified since argc > 1
    		*/
    		addr = simple_strtoul(argv[1], NULL, 16);
    		addr += base_address;
    	}
    
    #ifdef CONFIG_HAS_DATAFLASH
    	if (addr_dataflash(addr)){
    		puts ("Can't modify DataFlash in place. Use cp instead.\n\r");
    		return 0;
    	}
    #endif
    
    #ifdef CONFIG_BLACKFIN
    	if (addr_bfin_on_chip_mem(addr)) {
    		puts ("Can't modify L1 instruction in place. Use cp instead.\n\r");
    		return 0;
    	}
    #endif
    
    	/* Print the address, followed by value.  Then accept input for
    	 * the next value.  A non-converted value exits.
    	 */
    	do {
    		printf("%08lx:", addr);
    		if (size == 4)
    			printf(" %08x", *((uint   *)addr));
    		else if (size == 2)
    			printf(" %04x", *((ushort *)addr));
    		else
    			printf(" %02x", *((u_char *)addr));
    
    		nbytes = readline (" ? ");
    		if (nbytes == 0 || (nbytes == 1 && console_buffer[0] == '-')) {
    			/* <CR> pressed as only input, don't modify current
    			 * location and move to next. "-" pressed will go back.
    			 */
    			if (incrflag)
    				addr += nbytes ? -size : size;
    			nbytes = 1;
    #ifdef CONFIG_BOOT_RETRY_TIME
    			reset_cmd_timeout(); /* good enough to not time out */
    #endif
    		}
    #ifdef CONFIG_BOOT_RETRY_TIME
    		else if (nbytes == -2) {
    			break;	/* timed out, exit the command	*/
    		}
    #endif
    		else {
    			char *endp;
    			i = simple_strtoul(console_buffer, &endp, 16);
    			nbytes = endp - console_buffer;
    			if (nbytes) {
    #ifdef CONFIG_BOOT_RETRY_TIME
    				/* good enough to not time out
    				 */
    				reset_cmd_timeout();
    #endif
    				if (size == 4)
    					*((uint   *)addr) = i;
    				else if (size == 2)
    					*((ushort *)addr) = i;
    				else
    					*((u_char *)addr) = i;
    				if (incrflag)
    					addr += size;
    			}
    		}
    	} while (nbytes);
    
    	mm_last_addr = addr;
    	mm_last_size = size;
    	return 0;
    }
    
    #ifndef CONFIG_CRC32_VERIFY
    
    int do_mem_crc (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	ulong addr, length;
    	ulong crc;
    	ulong *ptr;
    
    	if (argc < 3)
    		return cmd_usage(cmdtp);
    
    	addr = simple_strtoul (argv[1], NULL, 16);
    	addr += base_address;
    
    	length = simple_strtoul (argv[2], NULL, 16);
    
    	crc = crc32 (0, (const uchar *) addr, length);
    
    	printf ("CRC32 for %08lx ... %08lx ==> %08lx\n",
    			addr, addr + length - 1, crc);
    
    	if (argc > 3) {
    		ptr = (ulong *) simple_strtoul (argv[3], NULL, 16);
    		*ptr = crc;
    	}
    
    	return 0;
    }
    
    #else	/* CONFIG_CRC32_VERIFY */
    
    int do_mem_crc (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	ulong addr, length;
    	ulong crc;
    	ulong *ptr;
    	ulong vcrc;
    	int verify;
    	int ac;
    	char * const *av;
    
    	if (argc < 3) {
    usage:
    		return cmd_usage(cmdtp);
    	}
    
    	av = argv + 1;
    	ac = argc - 1;
    	if (strcmp(*av, "-v") == 0) {
    		verify = 1;
    		av++;
    		ac--;
    		if (ac < 3)
    			goto usage;
    	} else
    		verify = 0;
    
    	addr = simple_strtoul(*av++, NULL, 16);
    	addr += base_address;
    	length = simple_strtoul(*av++, NULL, 16);
    
    	crc = crc32(0, (const uchar *) addr, length);
    
    	if (!verify) {
    		printf ("CRC32 for %08lx ... %08lx ==> %08lx\n",
    				addr, addr + length - 1, crc);
    		if (ac > 2) {
    			ptr = (ulong *) simple_strtoul (*av++, NULL, 16);
    			*ptr = crc;
    		}
    	} else {
    		vcrc = simple_strtoul(*av++, NULL, 16);
    		if (vcrc != crc) {
    			printf ("CRC32 for %08lx ... %08lx ==> %08lx != %08lx ** ERROR **\n",
    					addr, addr + length - 1, crc, vcrc);
    			return 1;
    		}
    	}
    
    	return 0;
    
    }
    #endif	/* CONFIG_CRC32_VERIFY */
    
    #ifdef CONFIG_CMD_MD5SUM
    int do_md5sum(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	unsigned long addr, len;
    	unsigned int i;
    	u8 output[16];
    
    	if (argc < 3)
    		return cmd_usage(cmdtp);
    
    	addr = simple_strtoul(argv[1], NULL, 16);
    	len = simple_strtoul(argv[2], NULL, 16);
    
    	md5((unsigned char *) addr, len, output);
    	printf("md5 for %08lx ... %08lx ==> ", addr, addr + len - 1);
    	for (i = 0; i < 16; i++)
    		printf("%02x", output[i]);
    	printf("\n");
    
    	return 0;
    }
    #endif
    
    #ifdef CONFIG_CMD_SHA1
    int do_sha1sum(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	unsigned long addr, len;
    	unsigned int i;
    	u8 output[20];
    
    	if (argc < 3)
    		return cmd_usage(cmdtp);
    
    	addr = simple_strtoul(argv[1], NULL, 16);
    	len = simple_strtoul(argv[2], NULL, 16);
    
    	sha1_csum((unsigned char *) addr, len, output);
    	printf("SHA1 for %08lx ... %08lx ==> ", addr, addr + len - 1);
    	for (i = 0; i < 20; i++)
    		printf("%02x", output[i]);
    	printf("\n");
    
    	return 0;
    }
    #endif
    
    #ifdef CONFIG_CMD_UNZIP
    int do_unzip ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	unsigned long src, dst;
    	unsigned long src_len = ~0UL, dst_len = ~0UL;
    
    	switch (argc) {
    		case 4:
    			dst_len = simple_strtoul(argv[3], NULL, 16);
    			/* fall through */
    		case 3:
    			src = simple_strtoul(argv[1], NULL, 16);
    			dst = simple_strtoul(argv[2], NULL, 16);
    			break;
    		default:
    			return cmd_usage(cmdtp);
    	}
    
    	return !!gunzip((void *) dst, dst_len, (void *) src, &src_len);
    }
    #endif /* CONFIG_CMD_UNZIP */
    
    
    /**************************************************/
    U_BOOT_CMD(
    	md,	3,	1,	do_mem_md,
    	"memory display",
    	"[.b, .w, .l] address [# of objects]"
    );
    
    
    U_BOOT_CMD(
    	mm,	2,	1,	do_mem_mm,
    	"memory modify (auto-incrementing address)",
    	"[.b, .w, .l] address"
    );
    
    
    U_BOOT_CMD(
    	nm,	2,	1,	do_mem_nm,
    	"memory modify (constant address)",
    	"[.b, .w, .l] address"
    );
    
    U_BOOT_CMD(
    	mw,	4,	1,	do_mem_mw,
    	"memory write (fill)",
    	"[.b, .w, .l] address value [count]"
    );
    
    U_BOOT_CMD(
    	cp,	4,	1,	do_mem_cp,
    	"memory copy",
    	"[.b, .w, .l] source target count"
    );
    
    U_BOOT_CMD(
    	cmp,	4,	1,	do_mem_cmp,
    	"memory compare",
    	"[.b, .w, .l] addr1 addr2 count"
    );
    
    #ifndef CONFIG_CRC32_VERIFY
    
    U_BOOT_CMD(
    	crc32,	4,	1,	do_mem_crc,
    	"checksum calculation",
    	"address count [addr]\n    - compute CRC32 checksum [save at addr]"
    );
    
    #else	/* CONFIG_CRC32_VERIFY */
    
    U_BOOT_CMD(
    	crc32,	5,	1,	do_mem_crc,
    	"checksum calculation",
    	"address count [addr]\n    - compute CRC32 checksum [save at addr]\n"
    	"-v address count crc\n    - verify crc of memory area"
    );
    
    #endif	/* CONFIG_CRC32_VERIFY */
    
    U_BOOT_CMD(
    	base,	2,	1,	do_mem_base,
    	"print or set address offset",
    	"\n    - print address offset for memory commands\n"
    	"base off\n    - set address offset for memory commands to 'off'"
    );
    
    U_BOOT_CMD(
    	loop,	3,	1,	do_mem_loop,
    	"infinite loop on address range",
    	"[.b, .w, .l] address number_of_objects"
    );
    
    #ifdef CONFIG_LOOPW
    U_BOOT_CMD(
    	loopw,	4,	1,	do_mem_loopw,
    	"infinite write loop on address range",
    	"[.b, .w, .l] address number_of_objects data_to_write"
    );
    #endif /* CONFIG_LOOPW */
    
    U_BOOT_CMD(
    	mtest,	5,	1,	do_mem_mtest,
    	"simple RAM read/write test",
    	"[start [end [pattern [iterations]]]]"
    );
    
    #ifdef CONFIG_MX_CYCLIC
    U_BOOT_CMD(
    	mdc,	4,	1,	do_mem_mdc,
    	"memory display cyclic",
    	"[.b, .w, .l] address count delay(ms)"
    );
    
    U_BOOT_CMD(
    	mwc,	4,	1,	do_mem_mwc,
    	"memory write cyclic",
    	"[.b, .w, .l] address value delay(ms)"
    );
    #endif /* CONFIG_MX_CYCLIC */
    
    #ifdef CONFIG_CMD_MD5SUM
    U_BOOT_CMD(
    	md5sum,	3,	1,	do_md5sum,
    	"compute MD5 message digest",
    	"address count"
    );
    #endif
    
    #ifdef CONFIG_CMD_SHA1SUM
    U_BOOT_CMD(
    	sha1sum,	3,	1,	do_sha1sum,
    	"compute SHA1 message digest",
    	"address count"
    );
    #endif /* CONFIG_CMD_SHA1 */
    
    #ifdef CONFIG_CMD_UNZIP
    U_BOOT_CMD(
    	unzip,	4,	1,	do_unzip,
    	"unzip a memory region",
    	"srcaddr dstaddr [dstsize]"
    );
    #endif /* CONFIG_CMD_UNZIP */