85cde0192a
Currently udelay relies on working EXT interrupts handler, which is not the case during early startup. In such cases udelay_simple() has to be used instead. To avoid mistakes of calling udelay too early, which could happen from the common code as well - make udelay work for the early code by introducing static branch and redirecting all udelay calls to udelay_simple until EXT interrupts handler is fully initialized and async stack is allocated. Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
27 lines
747 B
C
27 lines
747 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* S390 version
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* Copyright IBM Corp. 1999
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* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
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*
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* Derived from "include/asm-i386/delay.h"
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* Copyright (C) 1993 Linus Torvalds
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*
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* Delay routines calling functions in arch/s390/lib/delay.c
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*/
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#ifndef _S390_DELAY_H
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#define _S390_DELAY_H
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void udelay_enable(void);
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void __ndelay(unsigned long long nsecs);
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void __udelay(unsigned long long usecs);
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void udelay_simple(unsigned long long usecs);
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void __delay(unsigned long loops);
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#define ndelay(n) __ndelay((unsigned long long) (n))
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#define udelay(n) __udelay((unsigned long long) (n))
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#define mdelay(n) __udelay((unsigned long long) (n) * 1000)
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#endif /* defined(_S390_DELAY_H) */
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