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 */