projects / linux-2.6-block.git / blame
| 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 */ |