[coreboot] vga & serial debug support when building grub2 as payload
david.hendricks at gmail.com
Mon Sep 23 19:35:32 CEST 2013
On Mon, Sep 23, 2013 at 9:21 AM, Paul Menzel <
paulepanter at users.sourceforge.net> wrote:
> Dear Tank Tang,
> Am Sonntag, den 22.09.2013, 16:20 +0800 schrieb jstkf2012 at 126.com:
> > I am a bios engineer from Byosoft.
> welcome to coreboot! Communicating on mailing lists, please make sure to
> follow the netiquette . Especially, please just send plain text
> message with no HTML parts.
> > Unfortunately, I meet 2 questions about building Grub2 as coreboot's
> > (1)How can I enable vga support during post?
> > I have configure the following token:
> > CONFIG_VGA_ROM_RUN=y
> > CONFIG_VGA_BIOS=y
> > CONFIG_VGA_BIOS_ID="8086,0166"
> > CONFIG_VGA_BIOS_FILE="./src/vbios.bin"
> > But it seems that it doesn't make sence.Is there something need I to do
> in Grub2 to support vga.
> What board do you use?
> If coreboot successfully runs the VGA BIOS/Option ROM (and if it is
> needed), GRUB 2 should be able to display text on the monitor. I am
> successfully doing that on the ASRock E350M1.
> Do you get graphics with SeaBIOS as a payload and letting SeaBIOS run
> the VGA BIOS/Option ROM?
> > (2)How can I enable serial prot debug after Grub2 Payload is loaded?
> > I have add the following to grub.cfg and use "grub-mkimage -c ./grub.cfg
> ......." to make the Grub2.elf.
> > serial --speed=115200 --unit=0 --word=8 --parity=no
> > terminal_input --append serial
> > terminal_output --append serial
> > But it doesn't work after grub2 payload is called!
> That should work. Do you get serial output with coreboot? Do you get
> serial output from the GRUB installed on your hard disk?
Does TankTang also need to set GRUB_GFXMODE (ie GRUB_GFXMODE=640x480) in
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