/* SPDX-License-Identifier: GPL-2.0 */ // Copyright (C) 2005-2017 Andes Technology Corporation #ifndef __NDS32_DELAY_H__ #define __NDS32_DELAY_H__ #include <asm/param.h> /* There is no clocksource cycle counter in the CPU. */ static inline void __delay(unsigned long loops) { __asm__ __volatile__(".align 2\n" "1:\n" "\taddi\t%0, %0, -1\n" "\tbgtz\t%0, 1b\n" :"=r"(loops) :"0"(loops)); } static inline void __udelay(unsigned long usecs, unsigned long lpj) { usecs *= (unsigned long)(((0x8000000000000000ULL / (500000 / HZ)) + 0x80000000ULL) >> 32); usecs = (unsigned long)(((unsigned long long)usecs * lpj) >> 32); __delay(usecs); } #define udelay(usecs) __udelay((usecs), loops_per_jiffy) /* make sure "usecs *= ..." in udelay do not overflow. */ #if HZ >= 1000 #define MAX_UDELAY_MS 1 #elif HZ <= 200 #define MAX_UDELAY_MS 5 #else #define MAX_UDELAY_MS (1000 / HZ) #endif #endif