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Add a comment to clarify that some BIOSes may clear the hw watchdog

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indicator bit, preventing us from reporting in that case.

X-MFC-with:	r215868
This commit is contained in:
emaste 2010-12-07 19:18:00 +00:00
parent 37fc67e5ba
commit ffba45505b
1 changed files with 3 additions and 2 deletions
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5
sys/dev/ichwd/ichwd.c
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@ -520,8 +520,9 @@ ichwd_attach(device_t dev)
device_get_desc(dev), sc->ich_version);
/*
* Determine if we are coming up after a watchdog-induced reset.
* This bit is cleared in ichwd_sts_reset().
* Determine if we are coming up after a watchdog-induced reset. Some
* BIOSes may clear this bit at bootup, preventing us from reporting
* this case on such systems. We clear this bit in ichwd_sts_reset().
*/
if ((ichwd_read_tco_2(sc, TCO2_STS) & TCO_SECOND_TO_STS) != 0)
device_printf(dev,