[coreboot] Change to use CBFS - Help needed

Harrison, Jon (SELEX GALILEO, UK) jon.harrison at selexgalileo.com
Tue Aug 18 10:30:30 CEST 2009

Hmmm. I guess that means that a CBFS build automagically installs the
VGA bios and sets the PCI_ROM_ADDRESS reg in the correct device, and
since this 'should' be relocatable I should simply remove my NB code
that installs the VGA BIOS manually, and hope for the best.

At what stage in the init process does the PCI expansion ROM get
installed ? Is it necessary to call something from coreboot to make it
happen ?

Bochs as in Bochs BIOS, is needed to provide some callback support for
the vendor VGA BIOS. It could be considered as an option rom.... sort
of. It doesn't matter where it is in Flash so long as it can be found
programatically from coreboot, as it needs to be located in a specific
location in RAM for the legacy VGA to find it.

> -----Original Message-----
> From: Patrick Georgi [mailto:patrick at georgi-clan.de] 
> Sent: 17 August 2009 22:53
> To: Harrison, Jon (SELEX GALILEO, UK)
> Cc: coreboot at coreboot.org
> Subject: Re: [coreboot] Change to use CBFS - Help needed
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> Am 17.08.2009 18:56, schrieb Harrison, Jon (SELEX GALILEO, UK):
> > Or point to a good example to get started from.
> >
> > I guess something needs to be added to 
> targets/via/epia-n/Config.lb ??
> >
> > ..
> > ..
> > romimage "fallback"
> > 	option COREBOOT_EXTRA_VERSION = "-epia_n-fallback"
> > 	payload ../../../../../payloads/filo/filo.elf
> > end
> >    
> # outside the romimage section, as it's not part of the romimage
> pci_rom /path/to/vga.bin vendor_id=0xcafe device_id=0xbabe
> You don't have to care where it ends up, so you can increase the ROM 
> size in the configuration to its actual size, instead of merging the 
> files afterwards.
> what is bochs.bin? option rom? payload? something else?
> Patrick
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