/* * This file is part of the coreboot project. * * Copyright 2013 Google Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc. */ #include <boardid.h> #include <console/console.h> #include <gpio.h> uint8_t board_id(void) { static int id = -1; if (id < 0) { id = gpio_get(GPIO(Q3)) << 0 | gpio_get(GPIO(T1)) << 1 | gpio_get(GPIO(X1)) << 2 | gpio_get(GPIO(X4)) << 3; printk(BIOS_SPEW, "Board ID: %#x.\n", id); } return id; }