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Tests by numerous people have shown that many chipsets do not properly

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latch the acpi timer, resulting in weird deltas.  The problem is severe
enough to adversely effect the timecounter code.

Default to the 'safe' version of the get-timecount function.  The probe
will override it if a known-good chipset is found.  This is temporary
until a more complete solution is found.

Reviewed by:	phk
This commit is contained in:
Matthew Dillon 2002-02-24 22:58:15 +00:00
parent 3f7ad4d593
commit d32e27a9f4
1 changed files with 1 additions and 1 deletions
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2
sys/dev/acpica/acpi_timer.c
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@ -138,7 +138,7 @@ acpi_timer_identify(driver_t *driver, device_t parent)
if (getenv("debug.acpi.timer_test") != NULL)
acpi_timer_test();
acpi_timer_timecounter.tc_get_timecount = acpi_timer_get_timecount;
acpi_timer_timecounter.tc_get_timecount = acpi_timer_get_timecount_safe;
acpi_timer_timecounter.tc_frequency = acpi_timer_frequency;
tc_init(&acpi_timer_timecounter);