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Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
57 lines
1,022 B
C
57 lines
1,022 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2011 Richard Weinberger <richrd@nod.at>
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* Mostly copied from arch/x86/lib/delay.c
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*/
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#include <linux/export.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <asm/param.h>
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void __delay(unsigned long loops)
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{
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asm volatile(
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"test %0,%0\n"
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"jz 3f\n"
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"jmp 1f\n"
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".align 16\n"
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"1: jmp 2f\n"
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".align 16\n"
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"2: dec %0\n"
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" jnz 2b\n"
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"3: dec %0\n"
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: /* we don't need output */
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: "a" (loops)
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);
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}
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EXPORT_SYMBOL(__delay);
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inline void __const_udelay(unsigned long xloops)
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{
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int d0;
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xloops *= 4;
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asm("mull %%edx"
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: "=d" (xloops), "=&a" (d0)
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: "1" (xloops), "0"
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(loops_per_jiffy * (HZ/4)));
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__delay(++xloops);
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}
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EXPORT_SYMBOL(__const_udelay);
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void __udelay(unsigned long usecs)
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{
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__const_udelay(usecs * 0x000010c7); /* 2**32 / 1000000 (rounded up) */
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}
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EXPORT_SYMBOL(__udelay);
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void __ndelay(unsigned long nsecs)
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{
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__const_udelay(nsecs * 0x00005); /* 2**32 / 1000000000 (rounded up) */
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}
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EXPORT_SYMBOL(__ndelay);
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