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pstore_ram.h
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1 /*
2  * Copyright (C) 2010 Marco Stornelli <[email protected]>
3  * Copyright (C) 2011 Kees Cook <[email protected]>
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 
26 struct persistent_ram_buffer;
27 struct rs_control;
28 
29 struct persistent_ram_zone {
30  phys_addr_t paddr;
31  size_t size;
32  void *vaddr;
33  struct persistent_ram_buffer *buffer;
34  size_t buffer_size;
35 
36  /* ECC correction */
37  char *par_buffer;
38  char *par_header;
39  struct rs_control *rs_decoder;
40  int corrected_bytes;
41  int bad_blocks;
42  int ecc_block_size;
43  int ecc_size;
44 
45  char *old_log;
46  size_t old_log_size;
47 };
48 
49 struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start,
50  size_t size, u32 sig,
51  int ecc_size);
52 void persistent_ram_free(struct persistent_ram_zone *prz);
53 void persistent_ram_zap(struct persistent_ram_zone *prz);
54 
55 int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,
56  unsigned int count);
57 
58 void persistent_ram_save_old(struct persistent_ram_zone *prz);
59 size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
60 void *persistent_ram_old(struct persistent_ram_zone *prz);
61 void persistent_ram_free_old(struct persistent_ram_zone *prz);
62 ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
63  char *str, size_t len);
64 
65 /*
66  * Ramoops platform data
67  * @mem_size memory size for ramoops
68  * @mem_address physical memory address to contain ramoops
69  */
70 
71 struct ramoops_platform_data {
72  unsigned long mem_size;
73  unsigned long mem_address;
74  unsigned long record_size;
75  unsigned long console_size;
76  unsigned long ftrace_size;
77  int dump_oops;
78  int ecc_size;
79 };
80 
81 #endif
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