162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * delay.h: Linux delay routines on the Sparc. 462306a36Sopenharmony_ci * 562306a36Sopenharmony_ci * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu). 662306a36Sopenharmony_ci */ 762306a36Sopenharmony_ci 862306a36Sopenharmony_ci#ifndef __SPARC_DELAY_H 962306a36Sopenharmony_ci#define __SPARC_DELAY_H 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_ci#include <asm/cpudata.h> 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_cistatic inline void __delay(unsigned long loops) 1462306a36Sopenharmony_ci{ 1562306a36Sopenharmony_ci __asm__ __volatile__("cmp %0, 0\n\t" 1662306a36Sopenharmony_ci "1: bne 1b\n\t" 1762306a36Sopenharmony_ci "subcc %0, 1, %0\n" : 1862306a36Sopenharmony_ci "=&r" (loops) : 1962306a36Sopenharmony_ci "0" (loops) : 2062306a36Sopenharmony_ci "cc"); 2162306a36Sopenharmony_ci} 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ci/* This is too messy with inline asm on the Sparc. */ 2462306a36Sopenharmony_civoid __udelay(unsigned long usecs, unsigned long lpj); 2562306a36Sopenharmony_civoid __ndelay(unsigned long nsecs, unsigned long lpj); 2662306a36Sopenharmony_ci 2762306a36Sopenharmony_ci#ifdef CONFIG_SMP 2862306a36Sopenharmony_ci#define __udelay_val cpu_data(smp_processor_id()).udelay_val 2962306a36Sopenharmony_ci#else /* SMP */ 3062306a36Sopenharmony_ci#define __udelay_val loops_per_jiffy 3162306a36Sopenharmony_ci#endif /* SMP */ 3262306a36Sopenharmony_ci#define udelay(__usecs) __udelay(__usecs, __udelay_val) 3362306a36Sopenharmony_ci#define ndelay(__nsecs) __ndelay(__nsecs, __udelay_val) 3462306a36Sopenharmony_ci 3562306a36Sopenharmony_ci#endif /* defined(__SPARC_DELAY_H) */ 36