/* * This file is part of the coreboot project. * * Copyright 2014 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. */ #include <timer.h> #include <delay.h> #include <thread.h> __weak void init_timer(void) { /* do nothing */ } void udelay(unsigned int usec) { struct stopwatch sw; /* * As the timer granularity is in microseconds pad the * requested delay by one to get at least >= requested usec delay. */ usec += 1; if (!thread_yield_microseconds(usec)) return; stopwatch_init_usecs_expire(&sw, usec); stopwatch_wait_until_expired(&sw); }