cmd_mem.c

/*
 * (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 <hash.h>
#include <watchdog.h>
#include <asm/io.h>
#include <linux/compiler.h>

DECLARE_GLOBAL_DATA_PTR;

#ifndef CONFIG_SYS_MEMTEST_SCRATCH
#define CONFIG_SYS_MEMTEST_SCRATCH 0
#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.
 */
static uint	dp_last_addr, dp_last_size;
static uint	dp_last_length = 0x40;
static 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
static 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_RET_USAGE;

	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

	{
		ulong bytes = size * length;
		const void *buf = map_sysmem(addr, bytes);

		/* Print the lines. */
		print_buffer(addr, buf, size, length, DISP_LINE_LEN / size);
		addr += bytes;
		unmap_sysmem(buf);
	}
#endif

	dp_last_addr = addr;
	dp_last_length = length;
	dp_last_size = size;
	return (rc);
}

static int do_mem_mm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	return mod_mem (cmdtp, 1, flag, argc, argv);
}
static int do_mem_nm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	return mod_mem (cmdtp, 0, flag, argc, argv);
}

static int do_mem_mw(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	ulong	addr, writeval, count;
	int	size;
	void *buf;
	ulong bytes;

	if ((argc < 3) || (argc > 4))
		return CMD_RET_USAGE;

	/* 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;