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45 lines
1.2 KiB
45 lines
1.2 KiB
/* |
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* Copyright 2010 Tilera Corporation. All Rights Reserved. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation, version 2. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
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* NON INFRINGEMENT. See the GNU General Public License for |
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* more details. |
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*/ |
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#include <linux/module.h> |
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#include <linux/delay.h> |
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#include <linux/thread_info.h> |
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#include <asm/timex.h> |
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void __udelay(unsigned long usecs) |
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{ |
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if (usecs > ULONG_MAX / 1000) { |
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WARN_ON_ONCE(usecs > ULONG_MAX / 1000); |
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usecs = ULONG_MAX / 1000; |
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} |
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__ndelay(usecs * 1000); |
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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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cycles_t target = get_cycles(); |
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target += ns2cycles(nsecs); |
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while (get_cycles() < target) |
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cpu_relax(); |
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} |
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EXPORT_SYMBOL(__ndelay); |
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void __delay(unsigned long cycles) |
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{ |
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cycles_t target = get_cycles() + cycles; |
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while (get_cycles() < target) |
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cpu_relax(); |
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} |
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EXPORT_SYMBOL(__delay);
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