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Linux kernel mirror (for testing)
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kernel
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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
10#ifndef _ASM_POWERPC_NVRAM_H
11#define _ASM_POWERPC_NVRAM_H
12
13#include <linux/errno.h>
14
15#define NVRW_CNT 0x20
16#define NVRAM_HEADER_LEN 16 /* sizeof(struct nvram_header) */
17#define NVRAM_BLOCK_LEN 16
18#define NVRAM_MAX_REQ (2080/NVRAM_BLOCK_LEN)
19#define NVRAM_MIN_REQ (1056/NVRAM_BLOCK_LEN)
20
21#define NVRAM_AS0 0x74
22#define NVRAM_AS1 0x75
23#define NVRAM_DATA 0x77
24
25
26/* RTC Offsets */
27
28#define MOTO_RTC_SECONDS 0x1FF9
29#define MOTO_RTC_MINUTES 0x1FFA
30#define MOTO_RTC_HOURS 0x1FFB
31#define MOTO_RTC_DAY_OF_WEEK 0x1FFC
32#define MOTO_RTC_DAY_OF_MONTH 0x1FFD
33#define MOTO_RTC_MONTH 0x1FFE
34#define MOTO_RTC_YEAR 0x1FFF
35#define MOTO_RTC_CONTROLA 0x1FF8
36#define MOTO_RTC_CONTROLB 0x1FF9
37
38#define NVRAM_SIG_SP 0x02 /* support processor */
39#define NVRAM_SIG_OF 0x50 /* open firmware config */
40#define NVRAM_SIG_FW 0x51 /* general firmware */
41#define NVRAM_SIG_HW 0x52 /* hardware (VPD) */
42#define NVRAM_SIG_FLIP 0x5a /* Apple flip/flop header */
43#define NVRAM_SIG_APPL 0x5f /* Apple "system" (???) */
44#define NVRAM_SIG_SYS 0x70 /* system env vars */
45#define NVRAM_SIG_CFG 0x71 /* config data */
46#define NVRAM_SIG_ELOG 0x72 /* error log */
47#define NVRAM_SIG_VEND 0x7e /* vendor defined */
48#define NVRAM_SIG_FREE 0x7f /* Free space */
49#define NVRAM_SIG_OS 0xa0 /* OS defined */
50#define NVRAM_SIG_PANIC 0xa1 /* Apple OSX "panic" */
51
52/* If change this size, then change the size of NVNAME_LEN */
53struct nvram_header {
54 unsigned char signature;
55 unsigned char checksum;
56 unsigned short length;
57 char name[12];
58};
59
60#ifdef __KERNEL__
61
62#include <linux/list.h>
63
64struct nvram_partition {
65 struct list_head partition;
66 struct nvram_header header;
67 unsigned int index;
68};
69
70
71extern int nvram_write_error_log(char * buff, int length,
72 unsigned int err_type, unsigned int err_seq);
73extern int nvram_read_error_log(char * buff, int length,
74 unsigned int * err_type, unsigned int *err_seq);
75extern int nvram_clear_error_log(void);
76extern struct nvram_partition *nvram_find_partition(int sig, const char *name);
77
78extern int pSeries_nvram_init(void);
79
80#ifdef CONFIG_MMIO_NVRAM
81extern int mmio_nvram_init(void);
82#else
83static inline int mmio_nvram_init(void)
84{
85 return -ENODEV;
86}
87#endif
88
89#endif /* __KERNEL__ */
90
91/* PowerMac specific nvram stuffs */
92
93enum {
94 pmac_nvram_OF, /* Open Firmware partition */
95 pmac_nvram_XPRAM, /* MacOS XPRAM partition */
96 pmac_nvram_NR /* MacOS Name Registry partition */
97};
98
99#ifdef __KERNEL__
100/* Return partition offset in nvram */
101extern int pmac_get_partition(int partition);
102
103/* Direct access to XPRAM on PowerMacs */
104extern u8 pmac_xpram_read(int xpaddr);
105extern void pmac_xpram_write(int xpaddr, u8 data);
106
107/* Synchronize NVRAM */
108extern void nvram_sync(void);
109
110/* Normal access to NVRAM */
111extern unsigned char nvram_read_byte(int i);
112extern void nvram_write_byte(unsigned char c, int i);
113#endif
114
115/* Some offsets in XPRAM */
116#define PMAC_XPRAM_MACHINE_LOC 0xe4
117#define PMAC_XPRAM_SOUND_VOLUME 0x08
118
119/* Machine location structure in PowerMac XPRAM */
120struct pmac_machine_location {
121 unsigned int latitude; /* 2+30 bit Fractional number */
122 unsigned int longitude; /* 2+30 bit Fractional number */
123 unsigned int delta; /* mix of GMT delta and DLS */
124};
125
126/*
127 * /dev/nvram ioctls
128 *
129 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
130 * definitely obsolete. Do not use it if you can avoid it
131 */
132
133#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
134 _IOWR('p', 0x40, int)
135
136#define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */
137#define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */
138
139#endif /* _ASM_POWERPC_NVRAM_H */