arch/x86_64-pc/battclock/readbattclock.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id: readbattclock.c 19714 2003-09-09 17:48:30Z hkiel $
   4
   5     Desc: ReadBattClock() function.
   6     Lang: english
   7 */
   8 #include "battclock_intern.h"
   9
  10 #define ReadRTC(in,out)                         \
  11     asm volatile (                              \
  12     "outb       %%al,$0x70      \n\t"           \
  13     "inb        $0x71,%%al      \n\t"           \
  14     "movl       %%eax,%%ebx     \n\t"           \
  15     "andl       $0x0f,%%eax     \n\t"           \
  16     "shrl       $4,%%ebx        \n\t"           \
  17     "imul       $10,%%ebx       \n\t"           \
  18     "addl       %%ebx,%%eax"                    \
  19     : "=al"(out)                                \
  20     : "0"(in)                                   \
  21     : "%ebx","cc");
  22
  23 /*****************************************************************************
  24
  25     NAME */
  26 #include <proto/battclock.h>
  27 #include <proto/utility.h>
  28 #include <utility/date.h>
  29
  30         AROS_LH0(ULONG, ReadBattClock,
  31
  32 /*  SYNOPSIS */
  33         /* void */
  34
  35 /*  LOCATION */
  36         struct BattClockBase *, BattClockBase, 2, Battclock)
  37
  38 /*  FUNCTION
  39         Return the value stored in the battery back up clock. This value
  40         is the number of seconds that have elapsed since midnight on the
  41         1st of January 1978 (00:00:00 1.1.1978).
  42
  43         If the value of the battery clock is invalid, then the clock will
  44         be reset.
  45
  46     INPUTS
  47
  48     RESULT
  49         The number of seconds since 1.1.1978 00:00:00
  50
  51     NOTES
  52
  53     EXAMPLE
  54
  55     BUGS
  56
  57     SEE ALSO
  58         WriteBattClock, ResetBattClock
  59
  60     INTERNALS
  61
  62     HISTORY
  63         27-11-96    digulla automatically created from
  64                             battclock_lib.fd and clib/battclock_protos.h
  65
  66 *****************************************************************************/
  67 {
  68     AROS_LIBFUNC_INIT
  69
  70     struct ClockData date;
  71 #warning HACK: asm statements do not work with a single variable
  72     struct __myyear { UWORD year; } myyear;
  73 //    UWORD  year;
  74     ULONG  secs;
  75
  76 //    ReadRTC(50,year);
  77     ReadRTC(50,myyear.year);
  78     ReadRTC(9,date.year);
  79     ReadRTC(8,date.month);
  80     ReadRTC(7,date.mday);
  81     ReadRTC(4,date.hour);
  82     ReadRTC(2,date.min);
  83     ReadRTC(0,date.sec);
  84 //    date.year+=100*year;
  85     date.year+=100*myyear.year;
  86
  87     secs=Date2Amiga(&date);
  88
  89     return secs;
  90
  91     AROS_LIBFUNC_EXIT
  92 } /* ReadBattClock */