[coreboot] using SeaBios on EFI platforms
Scott D. Davilla
davilla at 4pi.com
Fri Feb 13 20:25:08 CET 2009
SeaBios seems to have matured nicely and I figure it's about time to
try again my attempts at resolving boot restrictions on the AppleTV.
For review, I'm the atv-bootloader author which is used for booting
Linux under the AppleTV. This is a second stage bootloader which
poses as a mach_kernel which was loaded by EFI firmware.
Currently, to enable loading a generic Linux kernel I'm already
moving RSDP and SMBIOS table to where Linux can find them as well as
converting the EFI memory map to an e820 memory map. This works very
well and the next step is to get VBIOS POST'ed and working. With
VBIOS working, this removes the last problem area that being able to
use generic video console drivers. Once this is done, then the Linux
kernels booted can be truly generic and also adds the possibility of
From what I can gleam from the code, it seems that I should be able
to load up SeaBios, setup the proper structures that it expects and
go. Then bang, instant bios which will not only handle vbios but also
a real bios.
Any comments or pointers to things to watch out for would be appreciated.
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