Using an external DSDT file with 2.4.19?

Using an external DSDT file with 2.4.19?

[John M Trostel]

I am now trying to use an external DSDT file (file.hex) to override what
was written in the BIOS.  Unfortunately, I can't quite figure out how to
get this file read rather than BIOS.  I see :

 http://www.cpqlinux.com/acpi-howto.html

but don't see how this will apply against the current 2.4.19 stuff.

-- 
John M. Trostel
Senior Software Engineer
Quantum Corp.
john.trostel-+vhbC7un7QRBDgjK7y7TUQ@public.gmane.org



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Re: Using an external DSDT file with 2.4.19?

[Troy Schultz]

I just went through this on the weekend, here is what I did.

change the name of the newly compiled DSDT.hex file to acpi_dsdt.c and
place it in the kernel tree under ../drivers/acpi/tables.

Then apply the following patch:
***BEGIN***
--- /usr/src/linux-2.4.19-acpi-20020821/drivers/acpi/osl.c.orig	Sun Sep  1 11:16:04 2002
+++ /usr/src/linux-2.4.19-acpi-20020821/drivers/acpi/osl.c	Sun Sep  1 11:16:54 2002
@@ -70,6 +70,7 @@
 static OSD_HANDLER acpi_irq_handler = NULL;
 static void *acpi_irq_context = NULL;
 
+extern unsigned char AmlCode[];
 
 acpi_status
 acpi_os_initialize(void)
@@ -221,7 +222,10 @@
 	if (!existing_table || !new_table)
 		return AE_BAD_PARAMETER;
 
-	*new_table = NULL;
+	if (strncmp(existing_table->signature, "DSDT", 4) == 0)
+		*new_table = (acpi_table_header*)AmlCode;
+	else
+		*new_table = NULL;
 	return AE_OK;
 }
 
***END***

This worked very well for me with kernel 2.4.19.

Best Regards
- Troy





On Thu, 2002-09-05 at 13:41, John M Trostel wrote:
> I am now trying to use an external DSDT file (file.hex) to override what
> was written in the BIOS.  Unfortunately, I can't quite figure out how to
> get this file read rather than BIOS.  I see :
> 
>  http://www.cpqlinux.com/acpi-howto.html
> 
> but don't see how this will apply against the current 2.4.19 stuff.
> 
> -- 
> John M. Trostel
> Senior Software Engineer
> Quantum Corp.
> john.trostel-+vhbC7un7QRBDgjK7y7TUQ@public.gmane.org
> 
> 
> 
> -------------------------------------------------------
> This sf.net email is sponsored by: OSDN - Tired of that same old
> cell phone?  Get a new here for FREE!
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> _______________________________________________
> Acpi-devel mailing list
> Acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> https://lists.sourceforge.net/lists/listinfo/acpi-devel
> 
> 




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Re: Using an external DSDT file with 2.4.19?

[KOCHI, Takayoshi]

Hi,

On Thu, 05 Sep 2002 13:41:47 -0400
John M Trostel <john.trostel-+vhbC7un7QRBDgjK7y7TUQ@public.gmane.org> wrote:

> I am now trying to use an external DSDT file (file.hex) to override what
> was written in the BIOS.  Unfortunately, I can't quite figure out how to
> get this file read rather than BIOS.  I see :
> 
>  http://www.cpqlinux.com/acpi-howto.html
> 
> but don't see how this will apply against the current 2.4.19 stuff.

The message below would help you.  This is very concise guide to
override your DSDT.

http://sourceforge.net/mailarchive/message.php?msg_id=1890462


Thanks,
-- 
KOCHI, Takayoshi <t-kouchi-f7IHDacdhdx8UrSeD/g0lQ@public.gmane.org/t-kouchi>



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Re: Using an external DSDT file with 2.4.19?

[Heiko Ettelbrück]

Hi John,

please have a look at
http://developer.intel.com/technology/iapc/acpi/bios_override.htm

It's part of Intel's ACPI how-to and describes how to extract the dsdt
from the bios, edit it and finally get the acpi code in your kernel to
use the edited dsdt instead of the one in the bios.

Hope this helps!
Heiko

Am Don, 2002-09-05 um 19.41 schrieb John M Trostel:
> I am now trying to use an external DSDT file (file.hex) to override what
> was written in the BIOS.  Unfortunately, I can't quite figure out how to
> get this file read rather than BIOS.  I see :
> 
>  http://www.cpqlinux.com/acpi-howto.html
> 
> but don't see how this will apply against the current 2.4.19 stuff.
> 
> -- 
> John M. Trostel
> Senior Software Engineer
> Quantum Corp.
> john.trostel-+vhbC7un7QRBDgjK7y7TUQ@public.gmane.org
> 
> 
> 
> -------------------------------------------------------
> This sf.net email is sponsored by: OSDN - Tired of that same old
> cell phone?  Get a new here for FREE!
> https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390
> _______________________________________________
> Acpi-devel mailing list
> Acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> https://lists.sourceforge.net/lists/listinfo/acpi-devel





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RE: Using an external DSDT file with 2.4.19?

[Black, Richard (Hou)]

I have now updated the ACPI howto instructions to include modifying a 2.4.19 kernel:

http://www.cpqlinux.com/acpi-howto.html#2.4.19-acpi-dsdt

Sincerely,
Richard Black
http://www.cpqlinux.com
http://www.geocities.com/rlcomp_1999
http://www.compaq.com/linux


-----Original Message-----
From: John M Trostel [mailto:john.trostel-+vhbC7un7QRBDgjK7y7TUQ@public.gmane.org]
Sent: Thursday, September 05, 2002 12:42 PM
To: ACPI-list
Subject: [ACPI] Using an external DSDT file with 2.4.19?


I am now trying to use an external DSDT file (file.hex) to override what
was written in the BIOS.  Unfortunately, I can't quite figure out how to
get this file read rather than BIOS.  I see :

 http://www.cpqlinux.com/acpi-howto.html

but don't see how this will apply against the current 2.4.19 stuff.

-- 
John M. Trostel
Senior Software Engineer
Quantum Corp.
john.trostel-+vhbC7un7QRBDgjK7y7TUQ@public.gmane.org



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