text: /*
   * (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>
  
  #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 *[]);
  
  /* 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 *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) {
  		cmd_usage(cmdtp);
  		return 1;
  	}
  
  	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 *argv[])
  {
  	return mod_mem (cmdtp, 1, flag, argc, argv);
  }
  int do_mem_nm ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  {
  	return mod_mem (cmdtp, 0, flag, argc, argv);
  }
  
  int do_mem_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  {
  	ulong	addr, writeval, count;
  	int	size;
  
  	if ((argc < 3) || (argc > 4)) {
  		cmd_usage(cmdtp);
  		return 1;
  	}
  
  	/* 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 *argv[])
  {
  	int i;
  	ulong count;
  
  	if (argc < 4) {
  		cmd_usage(cmdtp);
  		return 1;
  	}
  
  	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 *argv[])
  {
  	int i;
  	ulong count;
  
  	if (argc < 4) {
  		cmd_usage(cmdtp);
  		return 1;
  	}
  
  	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 *argv[])
  {
  	ulong	addr1, addr2, count, ngood;
  	int	size;
  	int     rcode = 0;
  
  	if (argc != 4) {
  		cmd_usage(cmdtp);
  		return 1;
  	}
  
  	/* 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;
  	}
  
  	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 *argv[])
  {
  	ulong	addr, dest, count;
  	int	size;
  
  	if (argc != 4) {
  		cmd_usage(cmdtp);
  		return 1;
  	}
  
  	/* 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;
  	}
  	return 0;
  }
  
  int do_mem_base (cmd_tbl_t *cmdtp, int flag, int argc, char *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 *argv[])
  {
  	ulong	addr, length, i, junk;
  	int	size;
  	volatile uint	*longp;
  	volatile ushort *shortp;
  	volatile u_char	*cp;
  
  	if (argc < 3) {
  		cmd_usage(cmdtp);
  		return 1;
  	}
  
  	/* 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 *argv[])
  {
  	ulong	addr, length, i, data;
  	int	size;
  	volatile uint	*longp;
  	volatile ushort *shortp;
  	volatile u_char	*cp;
  
  	if (argc < 4) {
  		cmd_usage(cmdtp);
  		return 1;
  	}
  
  	/* 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 *argv[])
  {
  	vu_long	*addr, *start, *end;
  	ulong	val;
  	ulong	readback;
  	int     rcode = 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) without errors.\n",
  				iterations-1);
  			return 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);
  			}
  			*addr  = ~val;
  			*dummy  = val;
  			readback = *addr;
  			if(readback != ~val) {
  			    printf ("FAILURE (data line): "
  				"Is %08lx, should be %08lx\n",
  					readback, ~val);
  			}
  		    }
  		}
  
  		/*
  		 * 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);
  			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);
  			    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);
  			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);
  			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) without errors.\n",
  				iterations-1);
  			return 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);
  				rcode = 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 rcode;
  }
  
  
  /* 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 *argv[])
  {
  	ulong	addr, i;
  	int	nbytes, size;
  	extern char console_buffer[];
  
  	if (argc != 2) {
  		cmd_usage(cmdtp);
  		return 1;
  	}
  
  #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 *argv[])
  {
  	ulong addr, length;
  	ulong crc;
  	ulong *ptr;
  
  	if (argc < 3) {
  		cmd_usage(cmdtp);
  		return 1;
  	}
  
  	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 *argv[])
  {
  	ulong addr, length;
  	ulong crc;
  	ulong *ptr;
  	ulong vcrc;
  	int verify;
  	int ac;
  	char **av;
  
  	if (argc < 3) {
    usage:
  		cmd_usage(cmdtp);
  		return 1;
  	}
  
  	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_UNZIP
  int  gunzip (void *, int, unsigned char *, unsigned long *);
  
  int do_unzip ( cmd_tbl_t *cmdtp, int flag, int argc, char *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:
  			cmd_usage(cmdtp);
  			return 1;
  	}
  
  	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_UNZIP
  U_BOOT_CMD(
  	unzip,	4,	1,	do_unzip,
  	"unzip a memory region",
  	"srcaddr dstaddr [dstsize]"
  );
  #endif /* CONFIG_CMD_UNZIP */
  