1/* 2 * Copyright (c) 2009 Mans Rullgard <mans@mansr.com> 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#ifndef AVUTIL_ARM_TIMER_H 22#define AVUTIL_ARM_TIMER_H 23 24#include <stdint.h> 25#include "config.h" 26 27#if HAVE_INLINE_ASM && defined(__ARM_ARCH_7A__) 28 29#define AV_READ_TIME read_time 30 31static inline uint64_t read_time(void) 32{ 33 unsigned cc; 34 __asm__ volatile ("mrc p15, 0, %0, c9, c13, 0" : "=r"(cc)); 35 return cc; 36} 37 38#endif /* HAVE_INLINE_ASM && __ARM_ARCH_7A__ */ 39 40#endif /* AVUTIL_ARM_TIMER_H */ 41