On Fri, Feb 13, 2009 at 02:25:08PM -0500, Scott D. Davilla wrote: > 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 booting Windows. > > 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.
Sounds interesting. As a thought, I wonder if we could extend SeaBIOS to make the EFI calls directly. The SeaBIOS post phase runs in 32bit mode (with standard gcc). Currently, the code in src/coreboot.c extracts info from the coreboot table to build the e820 map and copy rsdp. Maybe a src/efi.c could do something similar for EFI machines. Just a thought - let us know what you find. -Kevin -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
