> From: Pattrick Hueper [mailto:[email protected]] > Hi, > > i havent had time to look into seabios. > What i read/heard of seabios, it seems, that it is pretty much tied > with the x86 architecture, whereas the SLOF biosemu is designed to be > architecture > independent, and for me it has proven to be so by being ported from > OF/PPC to coreboot/x86 with reasonable effort. > > Being architecture independent, i think the biosemu has to keep its > own set of Interrupt Vectors and virtual 1MB memory area (which is, by > the way currently hard coded to 16MB of real memory i think...) > That makes it possible to reenter biosemu e.g. for VBE calls (which we > did in SLOF, the code is initializing the card by running the Option > ROM first and later on reenters biosemu to switch to > framebuffer mode). Of course in a x86 coreboot this might need to be > redesigned... then again for a x86 coreboot, seabios or vm86 might be > the better / faster choices anyway. > > I started working on porting v3 to qemu-ppc... once i have some serial > output, i will post patches. And i hope to hack qemu-ppc to use the > same cirrus > vga card and exprom and be able to initialize it in qemu-ppc though it > remains to be seen, wether that will work or wether it is already > there...
I think this makes your case much stronger. I didn't realize you were porting v3 to PPC. You're right that seabios is x86-specific. Myles -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
