| |
| /* |
| * arch/arm/cpu/armv8/txl/firmware/scp_task/lib/delay.c |
| * |
| * Copyright (C) 2015 Amlogic, Inc. All rights reserved. |
| * |
| * 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., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| */ |
| |
| #define P_AO_TIMER_E (*((volatile unsigned *)(0xff800000 + (0xf9 << 2)))) |
| unsigned int get_time(void) |
| { |
| return P_AO_TIMER_E; |
| } |
| |
| void _udelay(unsigned int us) |
| { |
| unsigned int t0 = get_time(); |
| |
| while (get_time() - t0 <= us) |
| ; |
| } |
| |
