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| 4 |
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| 5 | #include <linux/module.h>
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| 6 | #include <asm/delay.h>
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| 7 | #include <asm/param.h>
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| 8 | #include <asm/processor.h>
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| 9 | #include <asm/timex.h>
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| 10 |
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| 11 | void __delay(unsigned long cycles)
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| 12 | {
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| 13 | cycles_t start = get_cycles();
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| 14 |
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| 15 | while ((get_cycles() - start) < cycles)
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| 16 | cpu_relax();
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| 17 | }
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| 18 | EXPORT_SYMBOL(__delay);
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| 19 |
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| 20 | void __const_udelay(unsigned long xloops)
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| 21 | {
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| 22 | u64 loops;
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| 23 |
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| 24 | loops = (u64)xloops * loops_per_jiffy * HZ;
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| 25 |
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| 26 | __delay(loops >> 32);
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| 27 | }
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| 28 | EXPORT_SYMBOL(__const_udelay);
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| 29 |
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| 30 | void __udelay(unsigned long usecs)
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| 31 | {
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| 32 | __const_udelay(usecs * 0x10C7UL);
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| 33 | }
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| 34 | EXPORT_SYMBOL(__udelay);
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| 35 |
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| 36 | void __ndelay(unsigned long nsecs)
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| 37 | {
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| 38 | __const_udelay(nsecs * 0x5UL);
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| 39 | }
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| 40 | EXPORT_SYMBOL(__ndelay);
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