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f36e7c9845
Remove my old invalid email address which can be found in a couple of files. Instead of updating it, just remove my contact data completely from source files. We have git and other tools which allow to figure out who is responsible for what with recent contact data. Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Precise Delay Loops for S390
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*
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* Copyright IBM Corp. 1999, 2008
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* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>,
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*/
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#include <linux/processor.h>
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#include <linux/delay.h>
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#include <asm/div64.h>
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#include <asm/timex.h>
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void __delay(unsigned long loops)
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{
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/*
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* To end the bloody studid and useless discussion about the
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* BogoMips number I took the liberty to define the __delay
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* function in a way that that resulting BogoMips number will
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* yield the megahertz number of the cpu. The important function
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* is udelay and that is done using the tod clock. -- martin.
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*/
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asm volatile("0: brct %0,0b" : : "d" ((loops/2) + 1));
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}
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EXPORT_SYMBOL(__delay);
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static void delay_loop(unsigned long delta)
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{
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unsigned long end;
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end = get_tod_clock_monotonic() + delta;
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while (!tod_after(get_tod_clock_monotonic(), end))
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cpu_relax();
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}
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void __udelay(unsigned long usecs)
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{
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delay_loop(usecs << 12);
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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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nsecs <<= 9;
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do_div(nsecs, 125);
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delay_loop(nsecs);
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}
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EXPORT_SYMBOL(__ndelay);
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