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,
57			unsigned int memtype);
58void persistent_ram_free(struct persistent_ram_zone *prz);
59void persistent_ram_zap(struct persistent_ram_zone *prz);
60
61int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,
62	unsigned int count);
63
64void persistent_ram_save_old(struct persistent_ram_zone *prz);
65size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
66void *persistent_ram_old(struct persistent_ram_zone *prz);
67void persistent_ram_free_old(struct persistent_ram_zone *prz);
68ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
69	char *str, size_t len);
70
71/*
72 * Ramoops platform data
73 * @mem_size	memory size for ramoops
74 * @mem_address	physical memory address to contain ramoops
75 */
76
77struct ramoops_platform_data {
78	unsigned long	mem_size;
79	unsigned long	mem_address;
80	unsigned int	mem_type;
81	unsigned long	record_size;
82	unsigned long	console_size;
83	unsigned long	ftrace_size;
84	unsigned long	pmsg_size;
85	int		dump_oops;
86	struct persistent_ram_ecc_info ecc_info;
87};
88
89#endif
90