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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#include <linux/types.h>
13#include <linux/errno.h>
14#include <linux/list.h>
15#include <uapi/asm/nvram.h>
16
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
24struct err_log_info {
25 __be32 error_type;
26 __be32 seq_num;
27};
28
29struct 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
38struct oops_log_info {
39 __be16 version;
40 __be16 report_length;
41 __be64 timestamp;
42} __attribute__((packed));
43
44extern struct nvram_os_partition oops_log_partition;
45
46#ifdef CONFIG_PPC_PSERIES
47extern struct nvram_os_partition rtas_log_partition;
48
49extern int nvram_write_error_log(char * buff, int length,
50 unsigned int err_type, unsigned int err_seq);
51extern int nvram_read_error_log(char * buff, int length,
52 unsigned int * err_type, unsigned int *err_seq);
53extern int nvram_clear_error_log(void);
54extern int pSeries_nvram_init(void);
55#endif /* CONFIG_PPC_PSERIES */
56
57#ifdef CONFIG_MMIO_NVRAM
58extern int mmio_nvram_init(void);
59#else
60static inline int mmio_nvram_init(void)
61{
62 return -ENODEV;
63}
64#endif
65
66extern int __init nvram_scan_partitions(void);
67extern loff_t nvram_create_partition(const char *name, int sig,
68 int req_size, int min_size);
69extern int nvram_remove_partition(const char *name, int sig,
70 const char *exceptions[]);
71extern int nvram_get_partition_size(loff_t data_index);
72extern loff_t nvram_find_partition(const char *name, int sig, int *out_size);
73
74/* Return partition offset in nvram */
75extern int pmac_get_partition(int partition);
76
77/* Direct access to XPRAM on PowerMacs */
78extern u8 pmac_xpram_read(int xpaddr);
79extern void pmac_xpram_write(int xpaddr, u8 data);
80
81/* Synchronize NVRAM */
82extern void nvram_sync(void);
83
84/* Initialize NVRAM OS partition */
85extern int __init nvram_init_os_partition(struct nvram_os_partition *part);
86
87/* Initialize NVRAM oops partition */
88extern void __init nvram_init_oops_partition(int rtas_partition_exists);
89
90/* Read a NVRAM partition */
91extern 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 */
96extern 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
101/* Determine NVRAM size */
102extern ssize_t nvram_get_size(void);
103
104/* Normal access to NVRAM */
105extern unsigned char nvram_read_byte(int i);
106extern void nvram_write_byte(unsigned char c, int i);
107#endif /* _ASM_POWERPC_NVRAM_H */
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
10#ifndef _ASM_POWERPC_NVRAM_H
11#define _ASM_POWERPC_NVRAM_H
12
13/* Signatures for nvram partitions */
14#define NVRAM_SIG_SP 0x02 /* support processor */
15#define NVRAM_SIG_OF 0x50 /* open firmware config */
16#define NVRAM_SIG_FW 0x51 /* general firmware */
17#define NVRAM_SIG_HW 0x52 /* hardware (VPD) */
18#define NVRAM_SIG_FLIP 0x5a /* Apple flip/flop header */
19#define NVRAM_SIG_APPL 0x5f /* Apple "system" (???) */
20#define NVRAM_SIG_SYS 0x70 /* system env vars */
21#define NVRAM_SIG_CFG 0x71 /* config data */
22#define NVRAM_SIG_ELOG 0x72 /* error log */
23#define NVRAM_SIG_VEND 0x7e /* vendor defined */
24#define NVRAM_SIG_FREE 0x7f /* Free space */
25#define NVRAM_SIG_OS 0xa0 /* OS defined */
26#define NVRAM_SIG_PANIC 0xa1 /* Apple OSX "panic" */
27
28#ifdef __KERNEL__
29
30#include <linux/errno.h>
31#include <linux/list.h>
32
33#ifdef CONFIG_PPC_PSERIES
34extern int nvram_write_error_log(char * buff, int length,
35 unsigned int err_type, unsigned int err_seq);
36extern int nvram_read_error_log(char * buff, int length,
37 unsigned int * err_type, unsigned int *err_seq);
38extern int nvram_clear_error_log(void);
39extern int pSeries_nvram_init(void);
40#endif /* CONFIG_PPC_PSERIES */
41
42#ifdef CONFIG_MMIO_NVRAM
43extern int mmio_nvram_init(void);
44#else
45static inline int mmio_nvram_init(void)
46{
47 return -ENODEV;
48}
49#endif
50
51extern int __init nvram_scan_partitions(void);
52extern loff_t nvram_create_partition(const char *name, int sig,
53 int req_size, int min_size);
54extern int nvram_remove_partition(const char *name, int sig,
55 const char *exceptions[]);
56extern int nvram_get_partition_size(loff_t data_index);
57extern loff_t nvram_find_partition(const char *name, int sig, int *out_size);
58
59#endif /* __KERNEL__ */
60
61/* PowerMac specific nvram stuffs */
62
63enum {
64 pmac_nvram_OF, /* Open Firmware partition */
65 pmac_nvram_XPRAM, /* MacOS XPRAM partition */
66 pmac_nvram_NR /* MacOS Name Registry partition */
67};
68
69#ifdef __KERNEL__
70/* Return partition offset in nvram */
71extern int pmac_get_partition(int partition);
72
73/* Direct access to XPRAM on PowerMacs */
74extern u8 pmac_xpram_read(int xpaddr);
75extern void pmac_xpram_write(int xpaddr, u8 data);
76
77/* Synchronize NVRAM */
78extern void nvram_sync(void);
79
80/* Determine NVRAM size */
81extern ssize_t nvram_get_size(void);
82
83/* Normal access to NVRAM */
84extern unsigned char nvram_read_byte(int i);
85extern void nvram_write_byte(unsigned char c, int i);
86#endif
87
88/* Some offsets in XPRAM */
89#define PMAC_XPRAM_MACHINE_LOC 0xe4
90#define PMAC_XPRAM_SOUND_VOLUME 0x08
91
92/* Machine location structure in PowerMac XPRAM */
93struct pmac_machine_location {
94 unsigned int latitude; /* 2+30 bit Fractional number */
95 unsigned int longitude; /* 2+30 bit Fractional number */
96 unsigned int delta; /* mix of GMT delta and DLS */
97};
98
99/*
100 * /dev/nvram ioctls
101 *
102 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
103 * definitely obsolete. Do not use it if you can avoid it
104 */
105
106#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
107 _IOWR('p', 0x40, int)
108
109#define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */
110#define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */
111
112#endif /* _ASM_POWERPC_NVRAM_H */