src/system/libroot/os/arch/arm/system_time.c

   1 /*
   2  * Copyright 2012, Haiku, Inc.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              François Revol <revol@free.fr>
   7  */
   8
   9 #include <OS.h>
  10
  11 #include <arch_cpu.h>
  12 #include <libroot_private.h>
  13 #include <real_time_data.h>
  14
  15 static vint32 *sConversionFactor;
  16
  17 void
  18 __arm_setup_system_time(vint32 *cvFactor)
  19 {
  20         sConversionFactor = cvFactor;
  21 }
  22
  23
  24 //XXX: this is a hack
  25 // remove me when platform code works
  26 static int64
  27 __arm_get_time_base(void)
  28 {
  29         static uint64 time_dilation_field = 0;
  30         return time_dilation_field++;
  31 }
  32
  33 bigtime_t
  34 system_time(void)
  35 {
  36         uint64 timeBase = __arm_get_time_base();
  37
  38         uint32 cv = sConversionFactor ? *sConversionFactor : 0;
  39         return (timeBase >> 32) * cv + (((timeBase & 0xffffffff) * cv) >> 32);
  40 }