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TIMER: Make internal calibrated clock persist across multiple boots

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This commit is contained in:
Mark Pizzolato 2016-01-28 15:12:12 -08:00
parent e1ed22f30c
commit 9da10c1219
1 changed files with 22 additions and 1 deletions
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23
sim_timer.c
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@ -895,10 +895,12 @@ MTAB sim_timer_mod[] = {
{ 0 },
};
static t_stat sim_timer_clock_reset (DEVICE *dptr);
DEVICE sim_timer_dev = {
"TIMER", sim_timer_units, sim_timer_reg, sim_timer_mod,
SIM_NTIMERS+2, 0, 0, 0, 0, 0,
NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, &sim_timer_clock_reset, NULL, NULL, NULL,
NULL, DEV_DEBUG | DEV_NOSAVE, 0, sim_timer_debug};
@ -1393,6 +1395,25 @@ sim_activate_after (uptr, 1000000/CLK_TPS); /* reactivate unit */
return SCPE_OK;
}
static t_stat sim_timer_clock_reset (DEVICE *dptr)
{
uint32 i;
for (i = 0; i < SIM_NTIMERS; i++)
if (rtc_initd[i] != 0)
break;
if (i == SIM_NTIMERS) { /* No clocks have signed in. */
/* setup internal clock */
sim_timer_units[SIM_NTIMERS+1].action = &sim_timer_clock_tick_svc;
}
if (sim_timer_units[SIM_NTIMERS+1].action == &sim_timer_clock_tick_svc) {
/* actual clock reset */
sim_rtcn_init_unit (&sim_timer_units[SIM_NTIMERS+1], 5000, SIM_NTIMERS-1);
sim_activate_abs (&sim_timer_units[SIM_NTIMERS+1], 5000);
}
return SCPE_OK;
}
void sim_start_timer_services (void)
{
uint32 i;