Re: [RFC PATCH 04/14] ACPI: Add ACPI 5.0 Time and Alarm Devicedriver

[joeyli]

æ äï2014-01-08 æ 09:56 -0800ïH. Peter Anvin æåï
[...]
> > Document of Windows XP:
> >
> http://www.freelists.org/post/windows_errors/what-error-messages-really-mean-WinXP-IO-Ports-Blocked-from-Bios-AML-on-Windows-XP
> > 
> > If just for ACPI TAD testing, we can remove the port protection
> check of
> > RTC ports in hwvalid.c. I have read 0x70/0x71 port success after
> removed
> > the checking in acpica/hwvalid.c.
> > 
> > I will try to write RTC port in AML after remove acpica check, maybe
> > have other unpredictable situation.
> > 
> 
> Now *THERE* is a good use of the "no RTC bit".  In the case that bit
> is
> set we should presumably remove these ports from the block list.

Thanks for your suggestion, I will put a testing patch on this.

> 
> Otherwise we should use the CMOS address space, not the I/O port
> address
> space.
> 
>         -hpa 

Unfortunately current acpica leaks the SystemCMOS handler:

ACPI Error: Region SystemCMOS (ID=5) has no handler (20131115/exfldio-299)


Regards
Joey Lee


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