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Date: Mon, 03 Sep 2001 20:44:57 -0700 (PDT)
From: John Baldwin <jhb@FreeBSD.org>
To: Mike Smith <msmith@freebsd.org>
Subject: Re: ACPI errors
Cc: msmith@mass.dis.org, current@freebsd.org,
	"David W. Chapman Jr." <dwcjr@inethouston.net>
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On 03-Sep-01 Mike Smith wrote:
>> I'm getting this with the recent ACPI code, should I worry about it?
>> 
>> acpi_cpu0: <CPU> on acpi0
>> acpi_cpu: CLK_VAL field overflows P_CNT register
>> acpi_cpu: CLK_VAL field overlaps THT_EN bit
> 
> You shouldn't worry about it, no.  I need to get my hands on some more
> details so that I can understand what's going on here though.  The problem
> is that the bits specified to control the CPU clock run/pause ratio overlap
> other bits in the register that are already defined (and spill outside the
> register itself).  Either I have an arithmetic error, or your BIOS is 
> "broken" and we need to deal with it.

FWIW, Mike, I get the same thing on the quad xeon acer box as well.  Been
meaning to report that for a while, as I have some extra debugging printf's:

From dmesg:
acpi_cpu0: <CPU> on acpi0
acpi_cpu: CLK_VAL field overflows P_CNT register
XXX: cpu_duty_offset 0, cpu_duty_width 0, duty_end -1
acpi_cpu: CLK_VAL field overlaps THT_EN bit
acpi_cpu1: <CPU> on acpi0
acpi_cpu2: <CPU> on acpi0
acpi_cpu3: <CPU> on acpi0

From acpidump:
Scope(\_PR_) {
    Processor(\_PR_.CPU0, 1, 0x410, 0x6) {
    }
}
Processor(\_PR_.CPU1, 2, 0x410, 0x6) {
}
Processor(\_PR_.CPU2, 3, 0x410, 0x6) {
}
Processor(\_PR_.CPU3, 4, 0x410, 0x6) {
}

-- 

John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/
PGP Key: http://www.baldwin.cx/~john/pgpkey.asc
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/

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