On 08.09.2008 02:20, Kevin O'Connor wrote: > On Mon, Sep 08, 2008 at 01:50:07AM +0200, Carl-Daniel Hailfinger wrote: > >> On 08.09.2008 01:27, Kevin O'Connor wrote: >> >>> I don't think one can mark 48KB reserved below 0xA0000. I've found >>> that boot loaders are picky about any reserved memory below 1MB. >>> >> Would 0xC0000-0xCFFFF for be OK? We already use that on some targets. >> > > Using the space at 0xc8000 - 0xf0000 would work, but it would limit > the maximum number of option roms.
That applies to any location between 0xA0000 and 0xFFFFF, though. And a location below 0xA0000 would cause collisions with operating systems and bootloaders requiring lowmem if we didn't discard the stack after finishing execution of coreboot. > (You can't use 0xc0000 for long > term storage, because the vga option rom must reside there.) > Fortunately, the stack is designed to be discarded the moment we run a payload, so there are no survival requirements at all. Regards, Carl-Daniel -- http://www.hailfinger.org/ -- coreboot mailing list [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
