Myles Watson escribió: > > >>> I think this can be problematic, since by the time you can dump the >>> >> factory >> >>> BIOS resource allocation has already occurred. The resource map is only >>> good for early initialization, before resource allocation, right? >>> >> hmm. I had always used the bios map as a starting point and it had >> worked well for me. >> > > I think most of the time it should work fine, but we have some hard-coded > addresses where the chipset is expected to live in early setup routines, and > they might break. > > My resource map sets: > DRAM mappings for each node > MMIO mappings for each HT chain > PCI IO mappings for each HT chain > PCI Bus numbers for each HT chain > > I think they should only be needed for things like ck804_early_setup_car.c, > where I/O is being used and set up. If the mappings aren't configured the > reads and writes don't reach the chipset. > > >> But maybe things are much harder now. It is true that you need to do a bit >> of >> interpretation of the map once the factory BIOS has set it up. >> >> Does resource allocation get all the bits, even legacy ones? Are there >> not some resource map values that >> a resource allocator can not figure out? >> > > I don't know. Once resource allocation is done you should know where your > VGA card is, and where your Southbridge is. I'm probably missing something, > but I think once resource allocation is done all of the registers that are > touched in the resource map have been rewritten. > > Thanks, > Myles > > > Hi, and thx for your replies so far. For what I understand now is that the resource map is needed for early initialization work and if I'm booting my boards without one it is just luck when they work?! Furthermore I understand that I can't use setpci to dump the vendor BIOS registers once booted into Linux. Then, unfortunately, my question still remains about how to set up a correct resource map for my board? Could anyone who has done one explain how he/she did it?
In the meantime I tried a different resource map from a fam10 board and it seems to work, but just because sun were shinning ?? Thanks and again sorry for all the question marks, Knut Kujat. -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
