| /* |
| * Copyright (C) 2009 Matthias Kaehlcke <matthias@kaehlcke.net> |
| * |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * 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; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * 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., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| #include <common.h> |
| |
| /* delay execution before timers are initialized */ |
| static inline void early_udelay(uint32_t usecs) |
| { |
| /* loop takes 4 cycles at 5.0ns (fastest case, running at 200MHz) */ |
| register uint32_t loops = (usecs * 1000) / 20; |
| |
| __asm__ volatile ("1:\n" |
| "subs %0, %1, #1\n" |
| "bne 1b":"=r" (loops):"0" (loops)); |
| } |