[coreboot] CoreBoot and Payloads
Kevin O'Connor
kevin at koconnor.net
Thu Feb 5 02:37:59 CET 2009
On Thu, Feb 05, 2009 at 12:43:15AM +0100, Rudolf Marek wrote:
> Hi,
>
> You need to edit SeaBIOS config.h and tell where the ROM is in final image.
> SeaBIOS will load it for you. I'm out on bussiness trip from next day
> evening. Perhaps Kevin will help with details.
I ran gpxe from coreboot-v2 with seabios. The procedure I used was:
* modify coreboot-v2 Config.lb to make room for gpxe image. I set:
option ROM_SIZE = (256 * 1024) - (62 * 1024) - (53 * 1024)
Total rom is 256KiB, 62KiB is for vga rom, and 53KiB for
10ec8167.rom (gpxe rom).
* Configure seabios to deploy both a vga rom and gpxe rom by setting
in src/config.h:
#define OPTIONROM_BDF_1 0x0100
#define OPTIONROM_MEM_1 0xfffc0000
#define OPTIONROM_BDF_2 0x0048
#define OPTIONROM_MEM_2 0xfffcf800
The 0xfffc0000 corresponds with the 256KiB rom. The vga adapter is
at pci 1:00.0 (hex(1<<8) == 0x100) and nic is at pci 00:09.0
(hex(9<<3) == 0x48).
* Build coreboot-v2 with seabios as payload.
* Build the coreboot rom and combine with vga rom and gpxe:
cat video.bios.bin 10ec8167.rom coreboot.rom > coreboot.final.rom
Hope this helps.
-Kevin
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