2 * Copyright (C) 2011 Google, Inc.
4 * This software is licensed under the terms of the GNU General Public
5 * License version 2, as published by the Free Software Foundation, and
6 * may be copied, distributed, and modified under those terms.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
15 #ifndef __LINUX_PERSISTENT_RAM_H__
16 #define __LINUX_PERSISTENT_RAM_H__
18 #include <linux/device.h>
19 #include <linux/kernel.h>
20 #include <linux/list.h>
21 #include <linux/types.h>
23 struct persistent_ram_buffer;
25 struct persistent_ram_descriptor {
30 struct persistent_ram {
35 struct persistent_ram_descriptor *descs;
37 struct list_head node;
40 struct persistent_ram_zone {
41 struct list_head node;
43 struct persistent_ram_buffer *buffer;
50 struct rs_control *rs_decoder;
60 size_t old_log_footer_size;
64 int persistent_ram_early_init(struct persistent_ram *ram);
66 struct persistent_ram_zone *persistent_ram_init_ringbuffer(struct device *dev,
69 int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,
72 size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
73 void *persistent_ram_old(struct persistent_ram_zone *prz);
74 void persistent_ram_free_old(struct persistent_ram_zone *prz);
75 ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
76 char *str, size_t len);