| /* |
| * 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 <console/console.h> |
| #include <timer.h> |
| #include <delay.h> |
| #include <thread.h> |
| |
| __attribute__((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); |
| } |