bmp_header
struct bmp_header bmp_header;
image = early_memremap(bgrt->image_address, sizeof(bmp_header));
memcpy(&bmp_header, image, sizeof(bmp_header));
early_memunmap(image, sizeof(bmp_header));
if (bmp_header.id != 0x4d42) {
bmp_header.id);
bgrt_image_size = bmp_header.size;