f4efd01f60
RTC state, then it may clobber the RTC index register, so the index register must be restored before using it to restore control registers in rtc_restore(). The following problems remain: - rtc_restore() is only called if pmtimer is configured. Buggy suspend/resumes are more likely to clobber the index register than a control register, so pmtimer is more needed than it used to be. - pmtimer doesn't exist for amd64. - Restoring of the RTC state may race with rtcintr(). If an RTC interrupt is handled before the state is restored, then rtcin(RTC_INTR) in rtcintr() may read from the wrong register, so rtcintr() may spin forever. This may be mitigated by the most common state clobbering being to turn off RTC interrupts. |
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|---|---|---|
| .. | ||
| atrtc.c | ||
| isa_common.c | ||
| isa_common.h | ||
| isa_dmareg.h | ||
| isa_if.m | ||
| isahint.c | ||
| isareg.h | ||
| isavar.h | ||
| orm.c | ||
| pnp.c | ||
| pnpparse.c | ||
| pnpreg.h | ||
| pnpvar.h | ||
| rtc.h | ||
| syscons_isa.c | ||
| vga_isa.c | ||