projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 1da177e4 | 2 | /* |
| c55377ee | 3 | * NVRAM definitions and access functions. |
| 1da177e4 | 4 | */ |
| c55377ee PM |
5 | #ifndef _ASM_POWERPC_NVRAM_H |
| 6 | #define _ASM_POWERPC_NVRAM_H | |
| 1da177e4 | 7 | |
| 78989f0a | 8 | #include <linux/types.h> |
| 74d51d02 | 9 | #include <linux/errno.h> |
| 134d4956 | 10 | #include <linux/list.h> |
| c3617f72 | 11 | #include <uapi/asm/nvram.h> |
| 134d4956 | 12 | |
| 78989f0a HB |
13 | /* |
| 14 | * Set oops header version to distinguish between old and new format header. | |
| 15 | * lnx,oops-log partition max size is 4000, header version > 4000 will | |
| 16 | * help in identifying new header. | |
| 17 | */ | |
| 18 | #define OOPS_HDR_VERSION 5000 | |
| 19 | ||
| 20 | struct err_log_info { | |
| 21 | __be32 error_type; | |
| 22 | __be32 seq_num; | |
| 23 | }; | |
| 24 | ||
| 25 | struct nvram_os_partition { | |
| 26 | const char *name; | |
| 27 | int req_size; /* desired size, in bytes */ | |
| 28 | int min_size; /* minimum acceptable size (0 means req_size) */ | |
| 29 | long size; /* size of data portion (excluding err_log_info) */ | |
| 30 | long index; /* offset of data portion of partition */ | |
| 31 | bool os_partition; /* partition initialized by OS, not FW */ | |
| 32 | }; | |
| 33 | ||
| 34 | struct oops_log_info { | |
| 35 | __be16 version; | |
| 36 | __be16 report_length; | |
| 37 | __be64 timestamp; | |
| 38 | } __attribute__((packed)); | |
| 39 | ||
| 40 | extern struct nvram_os_partition oops_log_partition; | |
| 41 | ||
| edc79a2f | 42 | #ifdef CONFIG_PPC_PSERIES |
| 78989f0a HB |
43 | extern struct nvram_os_partition rtas_log_partition; |
| 44 | ||
| 0f2342c8 LV |
45 | extern int nvram_write_error_log(char * buff, int length, |
| 46 | unsigned int err_type, unsigned int err_seq); | |
| 47 | extern int nvram_read_error_log(char * buff, int length, | |
| 48 | unsigned int * err_type, unsigned int *err_seq); | |
| 1da177e4 | 49 | extern int nvram_clear_error_log(void); |
| 1da177e4 | 50 | extern int pSeries_nvram_init(void); |
| edc79a2f | 51 | #endif /* CONFIG_PPC_PSERIES */ |
| 4751505c IK |
52 | |
| 53 | #ifdef CONFIG_MMIO_NVRAM | |
| f3f66f59 | 54 | extern int mmio_nvram_init(void); |
| 4751505c IK |
55 | #else |
| 56 | static inline int mmio_nvram_init(void) | |
| 57 | { | |
| 58 | return -ENODEV; | |
| 59 | } | |
| 60 | #endif | |
| 61 | ||
| edc79a2f BH |
62 | extern int __init nvram_scan_partitions(void); |
| 63 | extern loff_t nvram_create_partition(const char *name, int sig, | |
| 64 | int req_size, int min_size); | |
| 0f4ac132 JK |
65 | extern int nvram_remove_partition(const char *name, int sig, |
| 66 | const char *exceptions[]); | |
| edc79a2f BH |
67 | extern int nvram_get_partition_size(loff_t data_index); |
| 68 | extern loff_t nvram_find_partition(const char *name, int sig, int *out_size); | |
| 69 | ||
| 1da177e4 LT |
70 | /* Return partition offset in nvram */ |
| 71 | extern int pmac_get_partition(int partition); | |
| 72 | ||
| 73 | /* Direct access to XPRAM on PowerMacs */ | |
| 74 | extern u8 pmac_xpram_read(int xpaddr); | |
| 75 | extern void pmac_xpram_write(int xpaddr, u8 data); | |
| 76 | ||
| 78989f0a HB |
77 | /* Initialize NVRAM OS partition */ |
| 78 | extern int __init nvram_init_os_partition(struct nvram_os_partition *part); | |
| 79 | ||
| 80 | /* Initialize NVRAM oops partition */ | |
| 81 | extern void __init nvram_init_oops_partition(int rtas_partition_exists); | |
| 82 | ||
| 83 | /* Read a NVRAM partition */ | |
| 84 | extern int nvram_read_partition(struct nvram_os_partition *part, char *buff, | |
| 85 | int length, unsigned int *err_type, | |
| 86 | unsigned int *error_log_cnt); | |
| 87 | ||
| 88 | /* Write to NVRAM OS partition */ | |
| 89 | extern int nvram_write_os_partition(struct nvram_os_partition *part, | |
| 90 | char *buff, int length, | |
| 91 | unsigned int err_type, | |
| 92 | unsigned int error_log_cnt); | |
| 93 | ||
| c55377ee | 94 | #endif /* _ASM_POWERPC_NVRAM_H */ |