Framebuffer address and kernel video mode

[phcoder]

Hello. First of all some good news: I managed to boot xnu kernel. To do 
so I need to set it to video mode and pass video mode info to kernel. 
Now I do it in adapter-specific way which is bad and ugly. So I would 
like to propose an interface to set video mode before loading kernel and 
then retrieve information:
For this I propose to put grub_gfxterm_init lines 253 (modevar = 
grub_env_get ("gfxmode"))-482 (grub_video_fill_rect (...)) into video.c as
grub_video_setup_by_var (char *varname)
The informations I need is:

framebuffer address, bytes_per_scan_line, resolution, color depth

Unfortunately framebuffer_address and bytes_per_scanline is missing from 
 struct grub_video_mode_info. I propose to add it to this structure

Thanks
Vladimir 'phcoder' Serbinenko