linux-imx

/*

 * MTD Oops/Panic logger

 *

 * Copyright © 2007 Nokia Corporation. All rights reserved.

 *

 * Author: Richard Purdie <rpurdie@openedhand.com>

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * version 2 as published by the Free Software Foundation.

 *

 * 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., 51 Franklin St, Fifth Floor, Boston, MA

 * 02110-1301 USA

 *

 */

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/console.h>

#include <linux/vmalloc.h>

#include <linux/workqueue.h>

#include <linux/sched.h>

#include <linux/wait.h>

#include <linux/delay.h>

#include <linux/interrupt.h>

#include <linux/mtd/mtd.h>

#include <linux/kmsg_dump.h>

​

/* Maximum MTD partition size */

#define MTDOOPS_MAX_MTD_SIZE (8 * 1024 * 1024)

​

#define MTDOOPS_KERNMSG_MAGIC 0x5d005d00

#define MTDOOPS_HEADER_SIZE   8

​

static unsigned long record_size = 4096;

module_param(record_size, ulong, 0400);

MODULE_PARM_DESC(record_size,

        "record size for MTD OOPS pages in bytes (default 4096)");

​

static char mtddev[80];

module_param_string(mtddev, mtddev, 80, 0400);

MODULE_PARM_DESC(mtddev,

        "name or index number of the MTD device to use");

​

static int dump_oops = 1;

module_param(dump_oops, int, 0600);

MODULE_PARM_DESC(dump_oops,

        "set to 1 to dump oopses, 0 to only dump panics (default 1)");

​

static struct mtdoops_context {

    struct kmsg_dumper dump;

​

    int mtd_index;

    struct work_struct work_erase;

    struct work_struct work_write;

    struct mtd_info *mtd;