2 keypoints to use coreboot+seabios to achieve WINDOWS-XP's s3 sleep/resume

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

Then there are two steps to do (Rudolf gave me much advice on IRC :-) ,
he is a good teacher)

#1 Since OS put some realmode code to the s3 resume vector before it
demands the mainboard to enter sleep,

we need to backup the resume code before coreboot using real memory(may
destroy the resume code) and recovery it before Coreboot jumps into the
resume vector.

In the main()of cache_as_ram_auto.c, just before the stack switching
code, add this:

if( (bootmode == 3){

print_debug("copy memory to high memory to protect s3
wakeup vector code \r\n");

memcpy((unsigned char
*)(highmem_bakaddress),(unsigned char *)0,
0x100000);//highmem_bakaddress=512M-xxM

}

In the acpi_jump_wake() of wakeup.c, add this:

memcpy((unsigned char *)(resumevector), (unsigned char
*)(highmem_bakaddress+resumevector), 0x1000);

//(ubuntu's vector=0x2000, XP's =0x1c000, but you should just get this
from the FACS table as in Kevin's patch, even he move the FACS to the
highend memory)

#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();}

if(acpi_sleep_type==3)

{xxxxxx}

if(acpi_sleep_type==3)

{xxxxxx}

[Rudolf Marek]

Hi Jason,

Just a quick note. Did you put whole coreboot to some high memory (the TEXT_BASE 
or whatever it has name for it - and reserve that memory)? If so, then must be 
just checked if coreboot changed some low memory. You can check it with the 
memory poison technique, check the previous mail. Maybe no other backups will be 
needed? Maybe the S4 resume from windows does not work because of some related 
memory corruption.

Rudolf

2 keypoints to use coreboot+seabios to achieve WINDOWS-XP's s3 sleep/resume

[Kevin O'Connor]

On Wed, Nov 19, 2008 at 11:56:34AM +0800, [e-mail] 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
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

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

-jasonzhao
> -----Original Message-----
> From: Kevin O'Connor [mailto:[e-mail]]
> Sent: Friday, December 19, 2008 11:57 AM
> To: Jason Zhao
> Cc: [e-mail]; [e-mail]
> 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, [e-mail]

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

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

[Kevin O'Connor]

On Fri, Dec 19, 2008 at 12:18:36PM +0800, [e-mail] wrote:
> > 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.

On a normal boot, SeaBIOS would be copied to ram at 0xf0000 and
coreboot would jump to its elf entry point.

On an S3 resume, it is important that coreboot not overwrite the
memory at 0xf0000.  We could re-use the elf entry point for S3 resume,
but because we're not actually deploying the elf into memory it may be
simpler to use the standard 16bit entry point (f000:fff0).

-Kevin