Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
c55377ee | 2 | * NVRAM definitions and access functions. |
1da177e4 LT |
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 | */ | |
c55377ee PM |
9 | #ifndef _ASM_POWERPC_NVRAM_H |
10 | #define _ASM_POWERPC_NVRAM_H | |
1da177e4 | 11 | |
78989f0a | 12 | #include <linux/types.h> |
74d51d02 | 13 | #include <linux/errno.h> |
134d4956 | 14 | #include <linux/list.h> |
c3617f72 | 15 | #include <uapi/asm/nvram.h> |
134d4956 | 16 | |
78989f0a HB |
17 | /* |
18 | * Set oops header version to distinguish between old and new format header. | |
19 | * lnx,oops-log partition max size is 4000, header version > 4000 will | |
20 | * help in identifying new header. | |
21 | */ | |
22 | #define OOPS_HDR_VERSION 5000 | |
23 | ||
24 | struct err_log_info { | |
25 | __be32 error_type; | |
26 | __be32 seq_num; | |
27 | }; | |
28 | ||
29 | struct nvram_os_partition { | |
30 | const char *name; | |
31 | int req_size; /* desired size, in bytes */ | |
32 | int min_size; /* minimum acceptable size (0 means req_size) */ | |
33 | long size; /* size of data portion (excluding err_log_info) */ | |
34 | long index; /* offset of data portion of partition */ | |
35 | bool os_partition; /* partition initialized by OS, not FW */ | |
36 | }; | |
37 | ||
38 | struct oops_log_info { | |
39 | __be16 version; | |
40 | __be16 report_length; | |
41 | __be64 timestamp; | |
42 | } __attribute__((packed)); | |
43 | ||
44 | extern struct nvram_os_partition oops_log_partition; | |
45 | ||
edc79a2f | 46 | #ifdef CONFIG_PPC_PSERIES |
78989f0a HB |
47 | extern struct nvram_os_partition rtas_log_partition; |
48 | ||
0f2342c8 LV |
49 | extern int nvram_write_error_log(char * buff, int length, |
50 | unsigned int err_type, unsigned int err_seq); | |
51 | extern int nvram_read_error_log(char * buff, int length, | |
52 | unsigned int * err_type, unsigned int *err_seq); | |
1da177e4 | 53 | extern int nvram_clear_error_log(void); |
1da177e4 | 54 | extern int pSeries_nvram_init(void); |
edc79a2f | 55 | #endif /* CONFIG_PPC_PSERIES */ |
4751505c IK |
56 | |
57 | #ifdef CONFIG_MMIO_NVRAM | |
f3f66f59 | 58 | extern int mmio_nvram_init(void); |
4751505c IK |
59 | #else |
60 | static inline int mmio_nvram_init(void) | |
61 | { | |
62 | return -ENODEV; | |
63 | } | |
64 | #endif | |
65 | ||
edc79a2f BH |
66 | extern int __init nvram_scan_partitions(void); |
67 | extern loff_t nvram_create_partition(const char *name, int sig, | |
68 | int req_size, int min_size); | |
0f4ac132 JK |
69 | extern int nvram_remove_partition(const char *name, int sig, |
70 | const char *exceptions[]); | |
edc79a2f BH |
71 | extern int nvram_get_partition_size(loff_t data_index); |
72 | extern loff_t nvram_find_partition(const char *name, int sig, int *out_size); | |
73 | ||
1da177e4 LT |
74 | /* Return partition offset in nvram */ |
75 | extern int pmac_get_partition(int partition); | |
76 | ||
77 | /* Direct access to XPRAM on PowerMacs */ | |
78 | extern u8 pmac_xpram_read(int xpaddr); | |
79 | extern void pmac_xpram_write(int xpaddr, u8 data); | |
80 | ||
81 | /* Synchronize NVRAM */ | |
c55377ee PM |
82 | extern void nvram_sync(void); |
83 | ||
78989f0a HB |
84 | /* Initialize NVRAM OS partition */ |
85 | extern int __init nvram_init_os_partition(struct nvram_os_partition *part); | |
86 | ||
87 | /* Initialize NVRAM oops partition */ | |
88 | extern void __init nvram_init_oops_partition(int rtas_partition_exists); | |
89 | ||
90 | /* Read a NVRAM partition */ | |
91 | extern int nvram_read_partition(struct nvram_os_partition *part, char *buff, | |
92 | int length, unsigned int *err_type, | |
93 | unsigned int *error_log_cnt); | |
94 | ||
95 | /* Write to NVRAM OS partition */ | |
96 | extern int nvram_write_os_partition(struct nvram_os_partition *part, | |
97 | char *buff, int length, | |
98 | unsigned int err_type, | |
99 | unsigned int error_log_cnt); | |
100 | ||
d331d830 MW |
101 | /* Determine NVRAM size */ |
102 | extern ssize_t nvram_get_size(void); | |
103 | ||
c55377ee PM |
104 | /* Normal access to NVRAM */ |
105 | extern unsigned char nvram_read_byte(int i); | |
106 | extern void nvram_write_byte(unsigned char c, int i); | |
c55377ee | 107 | #endif /* _ASM_POWERPC_NVRAM_H */ |