mismatch between FACP and chipset spec

[Rui Paulo]

On Thu, Feb 28, 2008 at 8:25 AM, Andriy Gapon <avg at icyb.net.ua> wrote:
>
>  As some of you probably already know I have a motherboard based on
>  440BX/PIIX4E chipset:
>  http://www.geocities.com/SiliconValley/3686/delta_mp2.html
>
>  Here's some info from ACPI tables:
>         PM1a_EVT_BLK=0x4000-0x4003
>         PM1a_CNT_BLK=0x4040-0x4041
>         PM_TMR_BLK=0x4008-0x400b
>
>  I know that in my case 0x4000 is a base address of "Power Management IO
>  Space" (as defined by PIIX4 specification).
>  I see that descriptions of the registers and their bits match between
>  ACPI specification and PIIX4 specification for registers in PM1a_EVT_BLK
>  (PMSTS and PMEN registers in PIIX4 parlance) and PM_TMR_BLK (PMTMP
>  register in PIIX4 parlance).
>  But addresses given for PM1a_CNT_BLK are not documented at all! On the
>  other hand ACPI description of that register perfectly matches
>  description of PIIX4 PMCNTRL register that is located at 0x4004 with a
>  given base address. So, this is 0x4040 vs. 0x4004, looks like a possible
>  typo/mistake by an author of ACPI tables for this motherboard.
>
>  Question: is there any way I can way override the address of
>  PM1a_CNT_BLK? My guess is that there is zero chance that there would be
>  any BIOS updates for this old and exotic motherboard (MP2-BX-X).

Try dumping your ACPI tables, change the address and load the new
tables on boot,
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/acpi-debug.html

Regards.
-- 
Rui Paulo