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

   1 /*
   2  * Copyright 2006, Ingo Weinhold <bonefish@cs.tu-berlin.de>.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6 #include <OS.h>
   7
   8 #include <arch_cpu.h>
   9 #include <libroot_private.h>
  10 #include <real_time_data.h>
  11
  12
  13 static struct arch_real_time_data *sRealTimeData;
  14
  15 void
  16 __arch_init_time(struct real_time_data *data, bool setDefaults)
  17 {
  18         sRealTimeData = &data->arch_data;
  19
  20         if (setDefaults) {
  21                 sRealTimeData->data[0].system_time_offset = 0;
  22                 sRealTimeData->system_time_conversion_factor = 1000000000LL;
  23                 sRealTimeData->version = 0;
  24         }
  25
  26         __arm_setup_system_time(&sRealTimeData->system_time_conversion_factor);
  27 }
  28
  29
  30 bigtime_t
  31 __arch_get_system_time_offset(struct real_time_data *data)
  32 {
  33         int32 version;
  34         bigtime_t offset;
  35         do {
  36                 version = sRealTimeData->version;
  37                 offset = sRealTimeData->data[version % 2].system_time_offset;
  38         } while (version != sRealTimeData->version);
  39
  40         return offset;
  41 }
  42