Hi, I encounter a small problem when writing the x86_64 EFI code. The loader does work, but I'm struggle to get the frame buffer to work. In order to do so, I need some information to fill in the linux header:
1. frame buffer address 2. frame buffer size 3. line buffer length Other information, width, height and color depth can be retrieved using UGA Draw protocol. I have figured out the correct value for my macbook. By setting them manually, I can get vesafb and efifb to work properly. intelfb is supposed to work by accessing video card directly, but it doesn't work for me. imacfb is just a hack, it works if I feed in the value properly. But for a normal user, they can't know the values. Is there a way to query them using pci interface, or is there some EFI service that I miss ? BTW, EFI 2.0 support Gop protocol which can be used to returned the above information. Unfortunately, apple don't support it. When would they upgrade to 2.0 ? -- Bean _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
