linux-imx

/*======================================================================

​

    drivers/mtd/afs.c: ARM Flash Layout/Partitioning

​

    Copyright © 2000 ARM Limited

​

   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

​

   This is access code for flashes using ARM's flash partitioning

   standards.

​

======================================================================*/

​

#include <linux/module.h>

#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/slab.h>

#include <linux/string.h>

#include <linux/init.h>

​

#include <linux/mtd/mtd.h>

#include <linux/mtd/map.h>

#include <linux/mtd/partitions.h>

​

#define AFSV1_FOOTER_MAGIC 0xA0FFFF9F

​

struct footer_v1 {

    u32 image_info_base;    /* Address of first word of ImageFooter  */

    u32 image_start;    /* Start of area reserved by this footer */

    u32 signature;      /* 'Magic' number proves it's a footer   */

    u32 type;       /* Area type: ARM Image, SIB, customer   */

    u32 checksum;       /* Just this structure                   */

};

​

struct image_info_v1 {

    u32 bootFlags;      /* Boot flags, compression etc.          */

    u32 imageNumber;    /* Unique number, selects for boot etc.  */

    u32 loadAddress;    /* Address program should be loaded to   */

    u32 length;     /* Actual size of image                  */

    u32 address;        /* Image is executed from here           */

    char name[16];      /* Null terminated                       */

    u32 headerBase;     /* Flash Address of any stripped header  */

    u32 header_length;  /* Length of header in memory            */

    u32 headerType;     /* AIF, RLF, s-record etc.               */

    u32 checksum;       /* Image checksum (inc. this struct)     */

};

​

static u32 word_sum(void *words, int num)

{

    u32 *p = words;

    u32 sum = 0;