arch/powerpc/include/uapi/asm/nvram.h

   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 _UAPI_ASM_POWERPC_NVRAM_H
  12 #define _UAPI_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
  32 enum {
  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 */
  44 struct 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 /* _UAPI_ASM_POWERPC_NVRAM_H */