$cd drivers/mtd/maps/
$cp edb7312.c at91rm9200.c

//拷贝过EDB7312稍作修改即可
config MTD_AT91RM9200
        tristate "CFI Flash device mapped on AT91RM9200"
        depends on ARM && MTD_CFI
        help
          This enables access to the CFI Flash on the ATMEL AT91RM9200DK board.
          If you have such a board, say 'Y' here.

obj-$(CONFIG_MTD_EDB7312) += edb7312.o
obj-$(CONFIG_MTD_AT91RM9200) += at91rm9200.o

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>

#ifdef CONFIG_MTD_PARTITIONS
#include <linux/mtd/partitions.h>
#endif

#define WINDOW_ADDR 0x10000000 /* physical properties of flash */
#define WINDOW_SIZE 0x00800000 /* intel 28F640J3A 8MB */
#define BUSWIDTH 2 /* data bus width 16bits */
/* can be "cfi_probe", "jedec_probe", "map_rom", NULL }; */
#define PROBETYPES { "cfi_probe", NULL }

#define MSG_PREFIX "AT91RM9200-NOR:" /* prefix for our printk()'s */
#define MTDID "at91rm9200-%d" /* for mtdparts= partitioning */

static struct mtd_info *mymtd;

struct map_info at91rm9200nor_map = {
        .name = "NOR flash on AT91RM9200DK",
        .size = WINDOW_SIZE,
        .bankwidth = BUSWIDTH,
        .phys = WINDOW_ADDR,
};

#ifdef CONFIG_MTD_PARTITIONS

/*
 * MTD partitioning stuff
 */
static struct mtd_partition at91rm9200nor_partitions[5] =
{
        {
                // U-boot 128KB
                .name = "U-boot",
                .size = 0x20000,
                .offset = 0
        },
        {
                // uImage 2MB
                .name = "Kernel",
                .size = 0x200000,
                .offset = 0x20000
        },
        {
                // RootFS 3MB
                .name = "RootFS",
                .size = 0x300000,
                .offset = 0x220000
        },
        {
                // UserFS
                .name = "Jffs2",
                .size = 0x2C0000,
                .offset = 0x520000
        },
        {
                // Parameters
                .name = "Parameters",
                .size = 0x20000,
                .offset = 0x7E0000
        },
};

static const char *probes[] = { NULL };

#endif

static int mtd_parts_nb = 0;
static struct mtd_partition *mtd_parts = 0;

int __init init_at91rm9200nor(void)
{
        static const char *rom_probe_types[] = PROBETYPES;
        const char **type;
        const char *part_type = 0;

        printk(KERN_NOTICE MSG_PREFIX "0x%08x at 0x%08xn",
               WINDOW_SIZE, WINDOW_ADDR);
        at91rm9200nor_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);

        if (!at91rm9200nor_map.virt) {
                printk(MSG_PREFIX "failed to ioremapn");
                return -EIO;
        }

        simple_map_init(&at91rm9200nor_map);

        mymtd = 0;
        type = rom_probe_types;
        for(; !mymtd && *type; type++) {
                mymtd = do_map_probe(*type, &at91rm9200nor_map);
        }
        if (mymtd) {
                mymtd->owner = THIS_MODULE;

#ifdef CONFIG_MTD_PARTITIONS
                mtd_parts_nb = parse_mtd_partitions(mymtd, probes, &mtd_parts, 0);
                if (mtd_parts_nb > 0)
                  part_type = "detected";

                if (mtd_parts_nb == 0)
                {
                        mtd_parts = at91rm9200nor_partitions;
                        mtd_parts_nb = ARRAY_SIZE(at91rm9200nor_partitions);
                        part_type = "static";
                }
#endif
                add_mtd_device(mymtd);
                if (mtd_parts_nb == 0)
                  printk(KERN_NOTICE MSG_PREFIX "no partition info availablen");
                else
                {
                        printk(KERN_NOTICE MSG_PREFIX
                               "using %s partition definitionn", part_type);
                        add_mtd_partitions(mymtd, mtd_parts, mtd_parts_nb);
                }
                return 0;
        }

        iounmap((void *)at91rm9200nor_map.virt);
        return -ENXIO;
}

static void __exit cleanup_at91rm9200nor(void)
{
        if (mymtd) {
                del_mtd_device(mymtd);
                map_destroy(mymtd);
        }
        if (at91rm9200nor_map.virt) {
                iounmap((void *)at91rm9200nor_map.virt);
                at91rm9200nor_map.virt = 0;
        }
}

module_init(init_at91rm9200nor);
module_exit(cleanup_at91rm9200nor);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Marius Groeger <mag@sysgo.de>");
MODULE_DESCRIPTION("Generic configurable MTD map driver");

TOPDIR=$($(which pwd))
TMP=$TOPDIR/linux.bin
TARGET=$TOPDIR/uImage

arm-linux-objcopy -O binary -S vmlinux $TMP && gzip -v9 $TMP &&
mkimage -n 'RAM disk' -A arm -O linux -T kernel -C gzip
        -a 0x20008000 -e 0x20008000 -d $TMP.gz $TARGET &&
cp $TARGET /mnt/hgfs/common &&
rm -f $TMP*

AT91RM9200-NOR:0x00800000 at 0x10000000
NOR flash on AT91RM9200DK: Found 1 x16 devices at 0x0 in 16-bit bank
 Intel/Sharp Extended Query Table at 0x0031
Using buffer write method
cfi_cmdset_0001: Erase suspend on write enabled
AT91RM9200-NOR:using static partition definition
Creating 5 MTD partitions on "NOR flash on AT91RM9200DK":
0x00000000-0x00020000 : "U-boot"
0x00020000-0x00220000 : "Kernel"
0x00220000-0x00520000 : "RootFS"
0x00520000-0x007e0000 : "Jffs2"
0x007e0000-0x00800000 : "Parameters"

[root@lqm ~]#cat /proc/mtd
dev: size erasesize name
mtd0: 00800000 00020000 "NOR flash on AT91RM9200DK"
mtd1: 00020000 00020000 "U-boot"
mtd2: 00200000 00020000 "Kernel"
mtd3: 00300000 00020000 "RootFS"
mtd4: 002c0000 00020000 "Jffs2"
mtd5: 00020000 00020000 "Parameters"

/*
 * Set the ethernet MAC address in dev->dev_addr
 */
static void __init get_mac_address(struct net_device *dev)
{
        #if 0
        /* Check Specific-Address 1 */
        if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA1H), at91_emac_read(AT91_EMAC_SA1L)))
                return;
        /* Check Specific-Address 2 */
        if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA2H), at91_emac_read(AT91_EMAC_SA2L)))
                return;
        /* Check Specific-Address 3 */
        if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA3H), at91_emac_read(AT91_EMAC_SA3L)))
                return;
        /* Check Specific-Address 4 */
        if (unpack_mac_address(dev, at91_emac_read(AT91_EMAC_SA4H), at91_emac_read(AT91_EMAC_SA4L)))
                return;
        #endif
        static char def_mac[] = {0x36, 0xB9, 0x04, 0x00, 0x24, 0x80};
        memcpy(dev->dev_addr, def_mac, 6);
        printk(KERN_ERR "at91_ether: Your bootloader did not configure a MAC address.n");
}