1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 2/*
 3 * NVRAM definitions and access functions.
 4 *
 5 * This program is free software; you can redistribute it and/or
 6 * modify it under the terms of the GNU General Public License
 7 * as published by the Free Software Foundation; either version
 8 * 2 of the License, or (at your option) any later version.
 9 */
10
11#ifndef _ASM_POWERPC_NVRAM_H
12#define _ASM_POWERPC_NVRAM_H
13
14/* Signatures for nvram partitions */
15#define NVRAM_SIG_SP	0x02	/* support processor */
16#define NVRAM_SIG_OF	0x50	/* open firmware config */
17#define NVRAM_SIG_FW	0x51	/* general firmware */
18#define NVRAM_SIG_HW	0x52	/* hardware (VPD) */
19#define NVRAM_SIG_FLIP	0x5a	/* Apple flip/flop header */
20#define NVRAM_SIG_APPL	0x5f	/* Apple "system" (???) */
21#define NVRAM_SIG_SYS	0x70	/* system env vars */
22#define NVRAM_SIG_CFG	0x71	/* config data */
23#define NVRAM_SIG_ELOG	0x72	/* error log */
24#define NVRAM_SIG_VEND	0x7e	/* vendor defined */
25#define NVRAM_SIG_FREE	0x7f	/* Free space */
26#define NVRAM_SIG_OS	0xa0	/* OS defined */
27#define NVRAM_SIG_PANIC	0xa1	/* Apple OSX "panic" */
28
29
30/* PowerMac specific nvram stuffs */
31
32enum {
33	pmac_nvram_OF,		/* Open Firmware partition */
34	pmac_nvram_XPRAM,	/* MacOS XPRAM partition */
35	pmac_nvram_NR		/* MacOS Name Registry partition */
36};
37
38
39/* Some offsets in XPRAM */
40#define PMAC_XPRAM_MACHINE_LOC	0xe4
41#define PMAC_XPRAM_SOUND_VOLUME	0x08
42
43/* Machine location structure in PowerMac XPRAM */
44struct pmac_machine_location {
45	unsigned int	latitude;	/* 2+30 bit Fractional number */
46	unsigned int	longitude;	/* 2+30 bit Fractional number */
47	unsigned int	delta;		/* mix of GMT delta and DLS */
48};
49
50/*
51 * /dev/nvram ioctls
52 *
53 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
54 * definitely obsolete. Do not use it if you can avoid it
55 */
56
57#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
58				_IOWR('p', 0x40, int)
59
60#define IOC_NVRAM_GET_OFFSET	_IOWR('p', 0x42, int)	/* Get NVRAM partition offset */
61#define IOC_NVRAM_SYNC		_IO('p', 0x43)		/* Sync NVRAM image */
62
63#endif /* _ASM_POWERPC_NVRAM_H */