int
acpitimer_init(struct acpi_softc *sc)
{
ACPI_STATUS rv;
uint32_t bits;
int i, j;
rv = AcpiGetTimerResolution(&bits);
if (ACPI_FAILURE(rv))
return -1;
if (bits == 32)
acpi_timecounter.tc_counter_mask = 0xffffffff;
for (i = j = 0; i < 10; i++)
j += acpitimer_test();
if (j >= 10) {
acpi_timecounter.tc_name = "ACPI-Fast";
acpi_timecounter.tc_get_timecount = acpitimer_read_fast;
acpi_timecounter.tc_quality = 1000;
}
tc_init(&acpi_timecounter);
aprint_debug_dev(sc->sc_dev, "%s %d-bit timer\n",
acpi_timecounter.tc_name, bits);
return 0;
}
static int
acpi_timer_probe(device_t dev)
{
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
if (dev != acpi_timer_dev)
return (ENXIO);
if (ACPI_FAILURE(AcpiGetTimerResolution(&acpi_timer_resolution)))
return (ENXIO);
return (0);
}
