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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 _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 
31 enum {
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 */
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 */