tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * NVRAM definitions and access functions.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 */
9#ifndef _ASM_POWERPC_NVRAM_H
10#define _ASM_POWERPC_NVRAM_H
11
12
13#include <linux/errno.h>
14#include <linux/list.h>
15#include <uapi/asm/nvram.h>
16
17#ifdef CONFIG_PPC_PSERIES
18extern int nvram_write_error_log(char * buff, int length,
19 unsigned int err_type, unsigned int err_seq);
20extern int nvram_read_error_log(char * buff, int length,
21 unsigned int * err_type, unsigned int *err_seq);
22extern int nvram_clear_error_log(void);
23extern int pSeries_nvram_init(void);
24#endif /* CONFIG_PPC_PSERIES */
25
26#ifdef CONFIG_MMIO_NVRAM
27extern int mmio_nvram_init(void);
28#else
29static inline int mmio_nvram_init(void)
30{
31 return -ENODEV;
32}
33#endif
34
35extern int __init nvram_scan_partitions(void);
36extern loff_t nvram_create_partition(const char *name, int sig,
37 int req_size, int min_size);
38extern int nvram_remove_partition(const char *name, int sig,
39 const char *exceptions[]);
40extern int nvram_get_partition_size(loff_t data_index);
41extern loff_t nvram_find_partition(const char *name, int sig, int *out_size);
42
43/* Return partition offset in nvram */
44extern int pmac_get_partition(int partition);
45
46/* Direct access to XPRAM on PowerMacs */
47extern u8 pmac_xpram_read(int xpaddr);
48extern void pmac_xpram_write(int xpaddr, u8 data);
49
50/* Synchronize NVRAM */
51extern void nvram_sync(void);
52
53/* Determine NVRAM size */
54extern ssize_t nvram_get_size(void);
55
56/* Normal access to NVRAM */
57extern unsigned char nvram_read_byte(int i);
58extern void nvram_write_byte(unsigned char c, int i);
59#endif /* _ASM_POWERPC_NVRAM_H */