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 _UAPI_ASM_POWERPC_NVRAM_H
11#define _UAPI_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
29/* PowerMac specific nvram stuffs */
30
31enum {
32	pmac_nvram_OF,		/* Open Firmware partition */
33	pmac_nvram_XPRAM,	/* MacOS XPRAM partition */
34	pmac_nvram_NR		/* MacOS Name Registry partition */
35};
36
37
38/* Some offsets in XPRAM */
39#define PMAC_XPRAM_MACHINE_LOC	0xe4
40#define PMAC_XPRAM_SOUND_VOLUME	0x08
41
42/* Machine location structure in PowerMac XPRAM */
43struct pmac_machine_location {
44	unsigned int	latitude;	/* 2+30 bit Fractional number */
45	unsigned int	longitude;	/* 2+30 bit Fractional number */
46	unsigned int	delta;		/* mix of GMT delta and DLS */
47};
48
49/*
50 * /dev/nvram ioctls
51 *
52 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
53 * definitely obsolete. Do not use it if you can avoid it
54 */
55
56#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
57				_IOWR('p', 0x40, int)
58
59#define IOC_NVRAM_GET_OFFSET	_IOWR('p', 0x42, int)	/* Get NVRAM partition offset */
60#define IOC_NVRAM_SYNC		_IO('p', 0x43)		/* Sync NVRAM image */
61
62#endif /* _UAPI_ASM_POWERPC_NVRAM_H */
63