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.
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.
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.
17 #ifndef __LINUX_PSTORE_RAM_H__
18 #define __LINUX_PSTORE_RAM_H__
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>
27 * Choose whether access to the RAM zone requires locking or not. If a zone
28 * can be written to from different CPUs like with ftrace for example, then
29 * PRZ_FLAG_NO_LOCK is used. For all other cases, locking is required.
31 #define PRZ_FLAG_NO_LOCK BIT(0)
33 struct persistent_ram_buffer;
36 struct persistent_ram_ecc_info {
43 struct persistent_ram_zone {
47 struct persistent_ram_buffer *buffer;
50 raw_spinlock_t buffer_lock;
55 struct rs_control *rs_decoder;
58 struct persistent_ram_ecc_info ecc_info;
64 struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,
65 u32 sig, struct persistent_ram_ecc_info *ecc_info,
66 unsigned int memtype, u32 flags);
67 void persistent_ram_free(struct persistent_ram_zone *prz);
68 void persistent_ram_zap(struct persistent_ram_zone *prz);
70 int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,
73 void persistent_ram_save_old(struct persistent_ram_zone *prz);
74 size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
75 void *persistent_ram_old(struct persistent_ram_zone *prz);
76 void persistent_ram_free_old(struct persistent_ram_zone *prz);
77 ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
78 char *str, size_t len);
81 * Ramoops platform data
82 * @mem_size memory size for ramoops
83 * @mem_address physical memory address to contain ramoops
86 struct ramoops_platform_data {
87 unsigned long mem_size;
88 unsigned long mem_address;
89 unsigned int mem_type;
90 unsigned long record_size;
91 unsigned long console_size;
92 unsigned long ftrace_size;
93 unsigned long pmsg_size;
95 struct persistent_ram_ecc_info ecc_info;