summaryrefslogtreecommitdiff
path: root/include/linux/pstore_ram.h
blob: 4af3fdc85b01cb6e36cd7bdae0783eb598c24843 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
/*
 * Copyright (C) 2010 Marco Stornelli <marco.stornelli@gmail.com>
 * Copyright (C) 2011 Kees Cook <keescook@chromium.org>
 * Copyright (C) 2011 Google, Inc.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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.
 *
 */

#ifndef __LINUX_PSTORE_RAM_H__
#define __LINUX_PSTORE_RAM_H__

#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/init.h>

struct persistent_ram_buffer;
struct rs_control;

struct persistent_ram_ecc_info {
	int block_size;
	int ecc_size;
	int symsize;
	int poly;
};

struct persistent_ram_zone {
	phys_addr_t paddr;
	size_t size;
	void *vaddr;
	struct persistent_ram_buffer *buffer;
	size_t buffer_size;

	/* ECC correction */
	char *par_buffer;
	char *par_header;
	struct rs_control *rs_decoder;
	int corrected_bytes;
	int bad_blocks;
	struct persistent_ram_ecc_info ecc_info;

	char *old_log;
	size_t old_log_size;
};

struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,
			u32 sig, struct persistent_ram_ecc_info *ecc_info,
			unsigned int memtype);
void persistent_ram_free(struct persistent_ram_zone *prz);
void persistent_ram_zap(struct persistent_ram_zone *prz);

int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,
	unsigned int count);

void persistent_ram_save_old(struct persistent_ram_zone *prz);
size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
void *persistent_ram_old(struct persistent_ram_zone *prz);
void persistent_ram_free_old(struct persistent_ram_zone *prz);
ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
	char *str, size_t len);

/*
 * Ramoops platform data
 * @mem_size	memory size for ramoops
 * @mem_address	physical memory address to contain ramoops
 */

struct ramoops_platform_data {
	unsigned long	mem_size;
	unsigned long	mem_address;
	unsigned int	mem_type;
	unsigned long	record_size;
	unsigned long	console_size;
	unsigned long	ftrace_size;
	int		dump_oops;
	struct persistent_ram_ecc_info ecc_info;
};

#endif