[coreboot] Convert Assembly JMP to C

[Patrick Georgi]

Joseph Smith schrieb:
> are really opposed to. But, All the info to boot is laid out in the
> MBR/first sector of the Active Partition.
>   
The first sector contains code. Code, that usually relies on BIOS
services to proceed (eg. to load its own config, to load the kernel, etc)
> 1. the MBR tells us where to find first sector of the Active Partition.
> 2. The first sector of the Active Partition tells us where OS Boot Sector
> code (GRUB stage2) is
>   
Even GRUB stage2 relies on BIOS services for all kind of hardware
access. Granted, there are native drivers (some of them appeared because
of coreboot), but I think you usually won't find them in the boot 
sector of an installed system.

When it comes to other boot loaders, all bets are off (though I'd wager
a bet that except for highly specialized stuff, all of them rely on
BIOS, if only, to support booting from various IDE/SCSI/whatever
controllers)


Regards,
Patrick Georgi