[coreboot] 2 keypoints to use coreboot+seabios to achieveWINDOWS-XP's s3 sleep/resume

[JasonZhao at viatech.com.cn]

-jasonzhao 

> -----Original Message-----
> From: Kevin O'Connor [mailto:kevin at koconnor.net]
> Sent: Friday, December 19, 2008 11:57 AM
> To: Jason Zhao
> Cc: coreboot at coreboot.org; r.marek at assembler.cz
> Subject: Re: [coreboot] 2 keypoints to use coreboot+seabios to
> achieveWINDOWS-XP's s3 sleep/resume
> 
> On Wed, Nov 19, 2008 at 11:56:34AM +0800, JasonZhao at viatech.com.cn
wrote:
> > Firstly, you need download two patchs:the Kevin's for using Seabios
as
> > payload, and Rudolf's for s3.
> >
> >
http://www.coreboot.org/pipermail/coreboot/2008-September/038551.html
> >
> > www.coreboot.org/pipermail/coreboot/2008-January/028787.html
> [...]
> > #2 Since when resume from S3, coreboot do not go into payload, so in
vga
> > driver codes need be added to do vga init after it judged that this
is a
> > boot waked from s3.
> >
> > if(acpi_sleep_type==3)
> >
> >          {printk_debug("Enable VGA console\n");
> >
> >          vga_enable_console();}
> 
> The bochs project just added S3 support to their code.  This required
> adding S3 resume support into SeaBIOS.  This support might also be
> useful to coreboot.
> 
> If it is desirable, we could have coreboot jump to SeaBIOS' post
> vector (f000:fff0) on an S3 resume instead of the OS.  SeaBIOS would
Jumping (f000:fff0) is used in V3? , I remember coreboot-v2 jump to
SeaBios via a "elf" way.
> then find the ACPI FACP table and resume the OS.  This might be useful
> if we want SeaBIOS to do vga option rom init on resume instead of
> having coreboot do the init.
> 
> -Kevin