diff --git a/sys/dev/ichwd/ichwd.c b/sys/dev/ichwd/ichwd.c index 727b96d3006..30f2f49eddb 100644 --- a/sys/dev/ichwd/ichwd.c +++ b/sys/dev/ichwd/ichwd.c @@ -225,12 +225,12 @@ ichwd_sts_reset(struct ichwd_softc *sc) * by writing a 1, not a 0. */ ichwd_write_tco_2(sc, TCO1_STS, TCO_TIMEOUT); - /* - * XXX The datasheet says that TCO_SECOND_TO_STS must be cleared - * before TCO_BOOT_STS, not the other way around. + /* + * According to Intel's docs, clearing SECOND_TO_STS and BOOT_STS must + * be done in two separate operations. */ - ichwd_write_tco_2(sc, TCO2_STS, TCO_BOOT_STS); ichwd_write_tco_2(sc, TCO2_STS, TCO_SECOND_TO_STS); + ichwd_write_tco_2(sc, TCO2_STS, TCO_BOOT_STS); } /* @@ -520,11 +520,12 @@ ichwd_attach(device_t dev) device_get_desc(dev), sc->ich_version); /* - * XXX we should check the status registers (specifically, the - * TCO_SECOND_TO_STS bit in the TCO2_STS register) to see if we - * just came back from a watchdog-induced reset, and let the user - * know. + * Determine if we are coming up after a watchdog-induced reset. + * This bit is cleared in ichwd_sts_reset(). */ + if ((ich_read_tco_2(sc, TCO2_STS) & TCO_SECOND_TO_STS) != 0) + device_printf(dev, + "resuming after hardware watchdog timeout\n"); /* reset the watchdog status registers */ ichwd_sts_reset(sc);