1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (C) 2005-2017 Andes Technology Corporation
4 #ifndef __NDS32_DELAY_H__
5 #define __NDS32_DELAY_H__
9 /* There is no clocksource cycle counter in the CPU. */
10 static inline void __delay(unsigned long loops)
12 __asm__ __volatile__(".align 2\n"
14 "\taddi\t%0, %0, -1\n"
20 static inline void __udelay(unsigned long usecs, unsigned long lpj)
22 usecs *= (unsigned long)(((0x8000000000000000ULL / (500000 / HZ)) +
23 0x80000000ULL) >> 32);
24 usecs = (unsigned long)(((unsigned long long)usecs * lpj) >> 32);
28 #define udelay(usecs) __udelay((usecs), loops_per_jiffy)
30 /* make sure "usecs *= ..." in udelay do not overflow. */
32 #define MAX_UDELAY_MS 1
34 #define MAX_UDELAY_MS 5
36 #define MAX_UDELAY_MS (1000 / HZ)