sahoaishfias

void *vg_init(unsigned short mode) {
	struct reg86u reg86;
	vbe_mode_info_t info;
	struct mem_range range;
	int r;

	reg86.u.b.intno = 0x10;
	reg86.u.w.ax = 0x4F02;
	reg86.u.w.bx = 1 << 14 | mode;

	if (sys_int86(&reg86) != OK) {
		printf("set_vbe_mode: sys_int86() failed \n");
		return NULL;
	}

	vbe_get_mode_info(mode, &info);
	range.mr_base = info.PhysBasePtr;
	range.mr_limit = range.mr_base + info.XResolution * info.YResolution * info.BitsPerPixel;

	if (OK != (r = sys_privctl(SELF, SYS_PRIV_ADD_MEM, &range)))
		panic("video_txt: sys_privctl (ADD_MEM) failed: %d\n", r);
	video_mem = vm_map_phys(SELF, (void *) range.mr_base, info.XResolution * info.YResolution * info.BitsPerPixel);
	h_res = info.XResolution;
	v_res = info.YResolution;
	bits_per_pixel = info.BitsPerPixel;
	printf("physical address: %x\n",info.PhysBasePtr);
	return NULL;
}