/* Copyright Altera Corporation (C) 2014. 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, version 2, * as published by the Free Software Foundation. * * 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, see <http://www.gnu.org/licenses/>. * */ #include <linux/module.h> #include <asm/delay.h> #include <asm/param.h> #include <asm/processor.h> #include <asm/timex.h> void __delay(unsigned long cycles) { cycles_t start = get_cycles(); while ((get_cycles() - start) < cycles) cpu_relax(); } EXPORT_SYMBOL(__delay); void __const_udelay(unsigned long xloops) { u64 loops; loops = (u64)xloops * loops_per_jiffy * HZ; __delay(loops >> 32); } EXPORT_SYMBOL(__const_udelay); void __udelay(unsigned long usecs) { __const_udelay(usecs * 0x10C7UL); /* 2**32 / 1000000 (rounded up) */ } EXPORT_SYMBOL(__udelay); void __ndelay(unsigned long nsecs) { __const_udelay(nsecs * 0x5UL); /* 2**32 / 1000000000 (rounded up) */ } EXPORT_SYMBOL(__ndelay);