Furquan Shaikh | 4208e0c | 2014-04-28 16:43:07 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright 2014 Google Inc. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | */ |
| 19 | |
| 20 | #include <console/console.h> |
| 21 | #include <timer.h> |
| 22 | #include <delay.h> |
| 23 | #include <thread.h> |
| 24 | |
| 25 | void init_timer(void) |
| 26 | { |
| 27 | } |
| 28 | |
| 29 | void udelay(unsigned usec) |
| 30 | { |
Aaron Durbin | 515bd13 | 2014-08-04 16:21:50 -0500 | [diff] [blame] | 31 | struct mono_time current, end; |
| 32 | |
| 33 | if (!thread_yield_microseconds(usec)) |
| 34 | return; |
| 35 | |
| 36 | /* |
| 37 | * As the hardware clock granularity is in microseconds pad the |
| 38 | * requested delay by one to get at least >= requested usec delay. |
| 39 | */ |
| 40 | timer_monotonic_get(&end); |
| 41 | mono_time_add_usecs(&end, usec + 1); |
| 42 | do { |
| 43 | timer_monotonic_get(¤t); |
| 44 | } while (mono_time_before(¤t, &end)); |
Furquan Shaikh | 4208e0c | 2014-04-28 16:43:07 -0700 | [diff] [blame] | 45 | } |