VGA_MAP_MEM
vga_vram_base = VGA_MAP_MEM(vga_vram_base, vga_vram_size);
charmap = (char *) VGA_MAP_MEM(colourmap, 0);
charmap = (char *) VGA_MAP_MEM(blackwmap, 0);
info->screen_base = (void __iomem *)VGA_MAP_MEM(VGA_FB_PHYS_BASE, 0);