include/asm-ppc/nvram.h

   1 /*
   2  * PreP compliant NVRAM access
   3  */
   4
   5 #ifdef __KERNEL__
   6 #ifndef _PPC_NVRAM_H
   7 #define _PPC_NVRAM_H
   8
   9 #define NVRAM_AS0  0x74
  10 #define NVRAM_AS1  0x75
  11 #define NVRAM_DATA 0x77
  12
  13
  14 /* RTC Offsets */
  15
  16 #define MOTO_RTC_SECONDS                0x1FF9
  17 #define MOTO_RTC_MINUTES                0x1FFA
  18 #define MOTO_RTC_HOURS          0x1FFB
  19 #define MOTO_RTC_DAY_OF_WEEK            0x1FFC
  20 #define MOTO_RTC_DAY_OF_MONTH   0x1FFD
  21 #define MOTO_RTC_MONTH          0x1FFE
  22 #define MOTO_RTC_YEAR           0x1FFF
  23 #define MOTO_RTC_CONTROLA            0x1FF8
  24 #define MOTO_RTC_CONTROLB            0x1FF9
  25
  26 /* PowerMac specific nvram stuffs */
  27
  28 enum {
  29         pmac_nvram_OF,          /* Open Firmware partition */
  30         pmac_nvram_XPRAM,       /* MacOS XPRAM partition */
  31         pmac_nvram_NR           /* MacOS Name Registry partition */
  32 };
  33
  34 /* Return partition offset in nvram */
  35 extern int      pmac_get_partition(int partition);
  36
  37 /* Direct access to XPRAM on PowerMacs */
  38 extern u8       pmac_xpram_read(int xpaddr);
  39 extern void     pmac_xpram_write(int xpaddr, u8 data);
  40
  41 /* Synchronize NVRAM */
  42 extern void     nvram_sync(void);
  43
  44 /* Normal access to NVRAM */
  45 extern unsigned char nvram_read_byte(int i);
  46 extern void nvram_write_byte(unsigned char c, int i);
  47
  48 /* Some offsets in XPRAM */
  49 #define PMAC_XPRAM_MACHINE_LOC  0xe4
  50 #define PMAC_XPRAM_SOUND_VOLUME 0x08
  51
  52 /* Machine location structure in PowerMac XPRAM */
  53 struct pmac_machine_location {
  54         unsigned int    latitude;       /* 2+30 bit Fractional number */
  55         unsigned int    longitude;      /* 2+30 bit Fractional number */
  56         unsigned int    delta;          /* mix of GMT delta and DLS */
  57 };
  58
  59 /*
  60  * /dev/nvram ioctls
  61  *
  62  * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
  63  * definitely obsolete. Do not use it if you can avoid it
  64  */
  65
  66 #define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
  67                                 _IOWR('p', 0x40, int)
  68
  69 #define IOC_NVRAM_GET_OFFSET    _IOWR('p', 0x42, int)   /* Get NVRAM partition offset */
  70 #define IOC_NVRAM_SYNC          _IO('p', 0x43)          /* Sync NVRAM image */
  71
  72 #endif
  73 #endif /* __KERNEL__ */