include/asm-ppc64/nvram.h

   1 /*
   2  * PreP compliant NVRAM access
   3  * This needs to be updated for PPC64
   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 _PPC64_NVRAM_H
  12 #define _PPC64_NVRAM_H
  13
  14 #define NVRW_CNT 0x20
  15 #define NVRAM_HEADER_LEN 16 /* sizeof(struct nvram_header) */
  16 #define NVRAM_BLOCK_LEN 16
  17 #define NVRAM_MAX_REQ (2080/NVRAM_BLOCK_LEN)
  18 #define NVRAM_MIN_REQ (1056/NVRAM_BLOCK_LEN)
  19
  20 #define NVRAM_AS0  0x74
  21 #define NVRAM_AS1  0x75
  22 #define NVRAM_DATA 0x77
  23
  24
  25 /* RTC Offsets */
  26
  27 #define MOTO_RTC_SECONDS        0x1FF9
  28 #define MOTO_RTC_MINUTES        0x1FFA
  29 #define MOTO_RTC_HOURS          0x1FFB
  30 #define MOTO_RTC_DAY_OF_WEEK    0x1FFC
  31 #define MOTO_RTC_DAY_OF_MONTH   0x1FFD
  32 #define MOTO_RTC_MONTH          0x1FFE
  33 #define MOTO_RTC_YEAR           0x1FFF
  34 #define MOTO_RTC_CONTROLA       0x1FF8
  35 #define MOTO_RTC_CONTROLB       0x1FF9
  36
  37 #define NVRAM_SIG_SP    0x02    /* support processor */
  38 #define NVRAM_SIG_OF    0x50    /* open firmware config */
  39 #define NVRAM_SIG_FW    0x51    /* general firmware */
  40 #define NVRAM_SIG_HW    0x52    /* hardware (VPD) */
  41 #define NVRAM_SIG_FLIP  0x5a    /* Apple flip/flop header */
  42 #define NVRAM_SIG_APPL  0x5f    /* Apple "system" (???) */
  43 #define NVRAM_SIG_SYS   0x70    /* system env vars */
  44 #define NVRAM_SIG_CFG   0x71    /* config data */
  45 #define NVRAM_SIG_ELOG  0x72    /* error log */
  46 #define NVRAM_SIG_VEND  0x7e    /* vendor defined */
  47 #define NVRAM_SIG_FREE  0x7f    /* Free space */
  48 #define NVRAM_SIG_OS    0xa0    /* OS defined */
  49 #define NVRAM_SIG_PANIC 0xa1    /* Apple OSX "panic" */
  50
  51 /* If change this size, then change the size of NVNAME_LEN */
  52 struct nvram_header {
  53         unsigned char signature;
  54         unsigned char checksum;
  55         unsigned short length;
  56         char name[12];
  57 };
  58
  59 struct nvram_partition {
  60         struct list_head partition;
  61         struct nvram_header header;
  62         unsigned int index;
  63 };
  64
  65
  66 extern int nvram_write_error_log(char * buff, int length, unsigned int err_type);
  67 extern int nvram_read_error_log(char * buff, int length, unsigned int * err_type);
  68 extern int nvram_clear_error_log(void);
  69 extern struct nvram_partition *nvram_find_partition(int sig, const char *name);
  70
  71 extern int pSeries_nvram_init(void);
  72 extern int pmac_nvram_init(void);
  73 extern int bpa_nvram_init(void);
  74
  75 /* PowerMac specific nvram stuffs */
  76
  77 enum {
  78         pmac_nvram_OF,          /* Open Firmware partition */
  79         pmac_nvram_XPRAM,       /* MacOS XPRAM partition */
  80         pmac_nvram_NR           /* MacOS Name Registry partition */
  81 };
  82
  83 /* Return partition offset in nvram */
  84 extern int      pmac_get_partition(int partition);
  85
  86 /* Direct access to XPRAM on PowerMacs */
  87 extern u8       pmac_xpram_read(int xpaddr);
  88 extern void     pmac_xpram_write(int xpaddr, u8 data);
  89
  90 /* Synchronize NVRAM */
  91 extern int      nvram_sync(void);
  92
  93 /* Some offsets in XPRAM */
  94 #define PMAC_XPRAM_MACHINE_LOC  0xe4
  95 #define PMAC_XPRAM_SOUND_VOLUME 0x08
  96
  97 /* Machine location structure in PowerMac XPRAM */
  98 struct pmac_machine_location {
  99         unsigned int    latitude;       /* 2+30 bit Fractional number */
 100         unsigned int    longitude;      /* 2+30 bit Fractional number */
 101         unsigned int    delta;          /* mix of GMT delta and DLS */
 102 };
 103
 104 /*
 105  * /dev/nvram ioctls
 106  *
 107  * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
 108  * definitely obsolete. Do not use it if you can avoid it
 109  */
 110
 111 #define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
 112                                 _IOWR('p', 0x40, int)
 113
 114 #define IOC_NVRAM_GET_OFFSET    _IOWR('p', 0x42, int)   /* Get NVRAM partition offset */
 115
 116 #endif /* _PPC64_NVRAM_H */