1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only 2*4882a593Smuzhiyun /* Copyright Altera Corporation (C) 2014. All rights reserved. 3*4882a593Smuzhiyun */ 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <linux/module.h> 6*4882a593Smuzhiyun #include <asm/delay.h> 7*4882a593Smuzhiyun #include <asm/param.h> 8*4882a593Smuzhiyun #include <asm/processor.h> 9*4882a593Smuzhiyun #include <asm/timex.h> 10*4882a593Smuzhiyun __delay(unsigned long cycles)11*4882a593Smuzhiyunvoid __delay(unsigned long cycles) 12*4882a593Smuzhiyun { 13*4882a593Smuzhiyun cycles_t start = get_cycles(); 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun while ((get_cycles() - start) < cycles) 16*4882a593Smuzhiyun cpu_relax(); 17*4882a593Smuzhiyun } 18*4882a593Smuzhiyun EXPORT_SYMBOL(__delay); 19*4882a593Smuzhiyun __const_udelay(unsigned long xloops)20*4882a593Smuzhiyunvoid __const_udelay(unsigned long xloops) 21*4882a593Smuzhiyun { 22*4882a593Smuzhiyun u64 loops; 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun loops = (u64)xloops * loops_per_jiffy * HZ; 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun __delay(loops >> 32); 27*4882a593Smuzhiyun } 28*4882a593Smuzhiyun EXPORT_SYMBOL(__const_udelay); 29*4882a593Smuzhiyun __udelay(unsigned long usecs)30*4882a593Smuzhiyunvoid __udelay(unsigned long usecs) 31*4882a593Smuzhiyun { 32*4882a593Smuzhiyun __const_udelay(usecs * 0x10C7UL); /* 2**32 / 1000000 (rounded up) */ 33*4882a593Smuzhiyun } 34*4882a593Smuzhiyun EXPORT_SYMBOL(__udelay); 35*4882a593Smuzhiyun __ndelay(unsigned long nsecs)36*4882a593Smuzhiyunvoid __ndelay(unsigned long nsecs) 37*4882a593Smuzhiyun { 38*4882a593Smuzhiyun __const_udelay(nsecs * 0x5UL); /* 2**32 / 1000000000 (rounded up) */ 39*4882a593Smuzhiyun } 40*4882a593Smuzhiyun EXPORT_SYMBOL(__ndelay); 41