Release 4.14 arch/metag/include/asm/delay.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _METAG_DELAY_H

#define _METAG_DELAY_H

/*
 * Copyright (C) 1993 Linus Torvalds
 *
 * Delay routines calling functions in arch/metag/lib/delay.c
 */

/* Undefined functions to get compile-time errors */
extern void __bad_udelay(void);
extern void __bad_ndelay(void);

extern void __udelay(unsigned long usecs);
extern void __ndelay(unsigned long nsecs);
extern void __const_udelay(unsigned long xloops);
extern void __delay(unsigned long loops);

/* 0x10c7 is 2**32 / 1000000 (rounded up) */

#define udelay(n) (__builtin_constant_p(n) ? \
        ((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) : \
        __udelay(n))

/* 0x5 is 2**32 / 1000000000 (rounded up) */

#define ndelay(n) (__builtin_constant_p(n) ? \
        ((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \
        __ndelay(n))

#endif /* _METAG_DELAY_H */
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Directory: arch/metag/include/asm

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