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-rw-r--r--include/asm-powerpc/nvram.h120
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diff --git a/include/asm-powerpc/nvram.h b/include/asm-powerpc/nvram.h
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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
10#ifndef _ASM_POWERPC_NVRAM_H
11#define _ASM_POWERPC_NVRAM_H
12
13#define NVRW_CNT 0x20
14#define NVRAM_HEADER_LEN 16 /* sizeof(struct nvram_header) */
15#define NVRAM_BLOCK_LEN 16
16#define NVRAM_MAX_REQ (2080/NVRAM_BLOCK_LEN)
17#define NVRAM_MIN_REQ (1056/NVRAM_BLOCK_LEN)
18
19#define NVRAM_AS0 0x74
20#define NVRAM_AS1 0x75
21#define NVRAM_DATA 0x77
22
23
24/* RTC Offsets */
25
26#define MOTO_RTC_SECONDS 0x1FF9
27#define MOTO_RTC_MINUTES 0x1FFA
28#define MOTO_RTC_HOURS 0x1FFB
29#define MOTO_RTC_DAY_OF_WEEK 0x1FFC
30#define MOTO_RTC_DAY_OF_MONTH 0x1FFD
31#define MOTO_RTC_MONTH 0x1FFE
32#define MOTO_RTC_YEAR 0x1FFF
33#define MOTO_RTC_CONTROLA 0x1FF8
34#define MOTO_RTC_CONTROLB 0x1FF9
35
36#define NVRAM_SIG_SP 0x02 /* support processor */
37#define NVRAM_SIG_OF 0x50 /* open firmware config */
38#define NVRAM_SIG_FW 0x51 /* general firmware */
39#define NVRAM_SIG_HW 0x52 /* hardware (VPD) */
40#define NVRAM_SIG_FLIP 0x5a /* Apple flip/flop header */
41#define NVRAM_SIG_APPL 0x5f /* Apple "system" (???) */
42#define NVRAM_SIG_SYS 0x70 /* system env vars */
43#define NVRAM_SIG_CFG 0x71 /* config data */
44#define NVRAM_SIG_ELOG 0x72 /* error log */
45#define NVRAM_SIG_VEND 0x7e /* vendor defined */
46#define NVRAM_SIG_FREE 0x7f /* Free space */
47#define NVRAM_SIG_OS 0xa0 /* OS defined */
48#define NVRAM_SIG_PANIC 0xa1 /* Apple OSX "panic" */
49
50/* If change this size, then change the size of NVNAME_LEN */
51struct nvram_header {
52 unsigned char signature;
53 unsigned char checksum;
54 unsigned short length;
55 char name[12];
56};
57
58struct nvram_partition {
59 struct list_head partition;
60 struct nvram_header header;
61 unsigned int index;
62};
63
64
65extern int nvram_write_error_log(char * buff, int length, unsigned int err_type);
66extern int nvram_read_error_log(char * buff, int length, unsigned int * err_type);
67extern int nvram_clear_error_log(void);
68extern struct nvram_partition *nvram_find_partition(int sig, const char *name);
69
70extern int pSeries_nvram_init(void);
71extern int pmac_nvram_init(void);
72extern int mmio_nvram_init(void);
73
74/* PowerMac specific nvram stuffs */
75
76enum {
77 pmac_nvram_OF, /* Open Firmware partition */
78 pmac_nvram_XPRAM, /* MacOS XPRAM partition */
79 pmac_nvram_NR /* MacOS Name Registry partition */
80};
81
82/* Return partition offset in nvram */
83extern int pmac_get_partition(int partition);
84
85/* Direct access to XPRAM on PowerMacs */
86extern u8 pmac_xpram_read(int xpaddr);
87extern void pmac_xpram_write(int xpaddr, u8 data);
88
89/* Synchronize NVRAM */
90extern void nvram_sync(void);
91
92/* Normal access to NVRAM */
93extern unsigned char nvram_read_byte(int i);
94extern void nvram_write_byte(unsigned char c, int i);
95
96/* Some offsets in XPRAM */
97#define PMAC_XPRAM_MACHINE_LOC 0xe4
98#define PMAC_XPRAM_SOUND_VOLUME 0x08
99
100/* Machine location structure in PowerMac XPRAM */
101struct pmac_machine_location {
102 unsigned int latitude; /* 2+30 bit Fractional number */
103 unsigned int longitude; /* 2+30 bit Fractional number */
104 unsigned int delta; /* mix of GMT delta and DLS */
105};
106
107/*
108 * /dev/nvram ioctls
109 *
110 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
111 * definitely obsolete. Do not use it if you can avoid it
112 */
113
114#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
115 _IOWR('p', 0x40, int)
116
117#define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */
118#define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */
119
120#endif /* _ASM_POWERPC_NVRAM_H */