cmd_mem.c

 *
 * 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) {
		printf ("Usage:\n%s\n", cmdtp->usage);
		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) {
		printf ("Usage:\n%s\n", cmdtp->usage);
		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:
		printf ("Usage:\n%s\n", cmdtp->usage);
		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 */

/**************************************************/
#if defined(CONFIG_CMD_MEMORY)
U_BOOT_CMD(
	md,     3,     1,      do_mem_md,
	"md      - memory display\n",
	"[.b, .w, .l] address [# of objects]\n    - memory display\n"
);


U_BOOT_CMD(
	mm,     2,      1,       do_mem_mm,
	"mm      - memory modify (auto-incrementing)\n",
	"[.b, .w, .l] address\n" "    - memory modify, auto increment address\n"
);


U_BOOT_CMD(
	nm,     2,	    1,     	do_mem_nm,
	"nm      - memory modify (constant address)\n",
	"[.b, .w, .l] address\n    - memory modify, read and keep address\n"
);

U_BOOT_CMD(
	mw,    4,    1,     do_mem_mw,
	"mw      - memory write (fill)\n",
	"[.b, .w, .l] address value [count]\n    - write memory\n"
);

U_BOOT_CMD(
	cp,    4,    1,    do_mem_cp,
	"cp      - memory copy\n",
	"[.b, .w, .l] source target count\n    - copy memory\n"
);

U_BOOT_CMD(
	cmp,    4,     1,     do_mem_cmp,
	"cmp     - memory compare\n",
	"[.b, .w, .l] addr1 addr2 count\n    - compare memory\n"
);

#ifndef CONFIG_CRC32_VERIFY

U_BOOT_CMD(
	crc32,    4,    1,     do_mem_crc,
	"crc32   - checksum calculation\n",
	"address count [addr]\n    - compute CRC32 checksum [save at addr]\n"
);

#else	/* CONFIG_CRC32_VERIFY */

U_BOOT_CMD(
	crc32,    5,    1,     do_mem_crc,
	"crc32   - checksum calculation\n",
	"address count [addr]\n    - compute CRC32 checksum [save at addr]\n"
	"-v address count crc\n    - verify crc of memory area\n"
);

#endif	/* CONFIG_CRC32_VERIFY */

U_BOOT_CMD(
	base,    2,    1,     do_mem_base,
	"base    - print or set address offset\n",
	"\n    - print address offset for memory commands\n"
	"base off\n    - set address offset for memory commands to 'off'\n"
);

U_BOOT_CMD(
	loop,    3,    1,    do_mem_loop,
	"loop    - infinite loop on address range\n",
	"[.b, .w, .l] address number_of_objects\n"
	"    - loop on a set of addresses\n"
);

#ifdef CONFIG_LOOPW
U_BOOT_CMD(
	loopw,    4,    1,    do_mem_loopw,
	"loopw   - infinite write loop on address range\n",
	"[.b, .w, .l] address number_of_objects data_to_write\n"
	"    - loop on a set of addresses\n"
);
#endif /* CONFIG_LOOPW */

U_BOOT_CMD(
	mtest,    4,    1,     do_mem_mtest,
	"mtest   - simple RAM test\n",
	"[start [end [pattern]]]\n"
	"    - simple RAM read/write test\n"
);

#ifdef CONFIG_MX_CYCLIC
U_BOOT_CMD(
	mdc,     4,     1,      do_mem_mdc,
	"mdc     - memory display cyclic\n",
	"[.b, .w, .l] address count delay(ms)\n    - memory display cyclic\n"
);

U_BOOT_CMD(
	mwc,     4,     1,      do_mem_mwc,
	"mwc     - memory write cyclic\n",
	"[.b, .w, .l] address value delay(ms)\n    - memory write cyclic\n"
);
#endif /* CONFIG_MX_CYCLIC */

#endif
#endif