target VENDOR_MAINBOARD mainboard VENDOR/MAINBOARD option CC="CROSSCC" option CROSS_COMPILE="CROSS_PREFIX" option HOSTCC="CROSS_HOSTCC" __COMPRESSION__ __LOGLEVEL__ romimage "fallback" option FALLBACK_SIZE = 256 * 1024 option USE_FALLBACK_IMAGE=1 option ROM_IMAGE_SIZE=128 * 1024 # 0x10000 option COREBOOT_EXTRA_VERSION=".0-Fallback" payload __PAYLOAD__ end buildrom ./coreboot.rom ROM_SIZE "fallback"