LXR linux/include/linux/pstore

   1/*
   2 * Copyright (C) 2010 Marco Stornelli <marco.stornelli@gmail.com>
   3 * Copyright (C) 2011 Kees Cook <keescook@chromium.org>
   4 * Copyright (C) 2011 Google, Inc.
   5 *
   6 * This software is licensed under the terms of the GNU General Public
   7 * License version 2, as published by the Free Software Foundation, and
   8 * may be copied, distributed, and modified under those terms.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 *
  15 */
  16
  17#ifndef __LINUX_PSTORE_RAM_H__
  18#define __LINUX_PSTORE_RAM_H__
  19
  20#include <linux/device.h>
  21#include <linux/kernel.h>
  22#include <linux/list.h>
  23#include <linux/types.h>
  24#include <linux/init.h>
  25
  26struct persistent_ram_buffer;
  27struct rs_control;
  28
  29struct persistent_ram_ecc_info {
  30        int block_size;
  31        int ecc_size;
  32        int symsize;
  33        int poly;
  34};
  35
  36struct persistent_ram_zone {
  37        phys_addr_t paddr;
  38        size_t size;
  39        void *vaddr;
  40        struct persistent_ram_buffer *buffer;
  41        size_t buffer_size;
  42
  43        /* ECC correction */
  44        char *par_buffer;
  45        char *par_header;
  46        struct rs_control *rs_decoder;
  47        int corrected_bytes;
  48        int bad_blocks;
  49        struct persistent_ram_ecc_info ecc_info;
  50
  51        char *old_log;
  52        size_t old_log_size;
  53};
  54
  55struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,
  56                        u32 sig, struct persistent_ram_ecc_info *ecc_info);
  57void persistent_ram_free(struct persistent_ram_zone *prz);
  58void persistent_ram_zap(struct persistent_ram_zone *prz);
  59
  60int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,
  61        unsigned int count);
  62
  63void persistent_ram_save_old(struct persistent_ram_zone *prz);
  64size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
  65void *persistent_ram_old(struct persistent_ram_zone *prz);
  66void persistent_ram_free_old(struct persistent_ram_zone *prz);
  67ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
  68        char *str, size_t len);
  69
  70/*
  71 * Ramoops platform data
  72 * @mem_size    memory size for ramoops
  73 * @mem_address physical memory address to contain ramoops
  74 */
  75
  76struct ramoops_platform_data {
  77        unsigned long   mem_size;
  78        unsigned long   mem_address;
  79        unsigned long   record_size;
  80        unsigned long   console_size;
  81        unsigned long   ftrace_size;
  82        int             dump_oops;
  83        struct persistent_ram_ecc_info ecc_info;
  84};
  85
  86#endif
  87