/* * linux/arch/unicore32/include/asm/delay.h * * Code specific to PKUnity SoC and UniCore ISA * * Copyright (C) 2001-2010 GUAN Xue-tao * * 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. * * Delay routines, using a pre-computed "loops_per_second" value. */ #ifndef __UNICORE_DELAY_H__ #define __UNICORE_DELAY_H__ #include <asm/param.h> /* HZ */ extern void __delay(int loops); /* * This function intentionally does not exist; if you see references to * it, it means that you're calling udelay() with an out of range value. * * With currently imposed limits, this means that we support a max delay * of 2000us. Further limits: HZ<=1000 and bogomips<=3355 */ extern void __bad_udelay(void); /* * division by multiplication: you don't have to worry about * loss of precision. * * Use only for very small delays ( < 1 msec). Should probably use a * lookup table, really, as the multiplications take much too long with * short delays. This is a "reasonable" implementation, though (and the * first constant multiplications gets optimized away if the delay is * a constant) */ extern void __udelay(unsigned long usecs); extern void __const_udelay(unsigned long); #define MAX_UDELAY_MS 2 #define udelay(n) \ (__builtin_constant_p(n) ? \ ((n) > (MAX_UDELAY_MS * 1000) ? __bad_udelay() : \ __const_udelay((n) * ((2199023U*HZ)>>11))) : \ __udelay(n)) #endif /* __UNICORE_DELAY_H__ */
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Kbuild | File | 877 B | 0644 |
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assembler.h | File | 2.71 KB | 0644 |
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barrier.h | File | 602 B | 0644 |
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bitops.h | File | 1.19 KB | 0644 |
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bug.h | File | 632 B | 0644 |
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cache.h | File | 805 B | 0644 |
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cacheflush.h | File | 6.46 KB | 0644 |
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checksum.h | File | 978 B | 0644 |
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cmpxchg.h | File | 1.43 KB | 0644 |
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cpu-single.h | File | 1.18 KB | 0644 |
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cputype.h | File | 787 B | 0644 |
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delay.h | File | 1.53 KB | 0644 |
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dma-mapping.h | File | 1.11 KB | 0644 |
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dma.h | File | 531 B | 0644 |
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elf.h | File | 2.58 KB | 0644 |
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fpstate.h | File | 550 B | 0644 |
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fpu-ucf64.h | File | 1.32 KB | 0644 |
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gpio.h | File | 2.75 KB | 0644 |
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hwcap.h | File | 773 B | 0644 |
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hwdef-copro.h | File | 1.3 KB | 0644 |
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io.h | File | 2 KB | 0644 |
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irq.h | File | 2.56 KB | 0644 |
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irqflags.h | File | 1.03 KB | 0644 |
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linkage.h | File | 524 B | 0644 |
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memblock.h | File | 1.1 KB | 0644 |
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memory.h | File | 3 KB | 0644 |
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mmu.h | File | 430 B | 0644 |
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mmu_context.h | File | 2.76 KB | 0644 |
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page.h | File | 1.89 KB | 0644 |
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pci.h | File | 578 B | 0644 |
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pgalloc.h | File | 2.47 KB | 0644 |
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pgtable-hwdef.h | File | 1.3 KB | 0644 |
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pgtable.h | File | 9.42 KB | 0644 |
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processor.h | File | 1.98 KB | 0644 |
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ptrace.h | File | 1.37 KB | 0644 |
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stacktrace.h | File | 787 B | 0644 |
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string.h | File | 994 B | 0644 |
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suspend.h | File | 667 B | 0644 |
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switch_to.h | File | 901 B | 0644 |
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thread_info.h | File | 3.29 KB | 0644 |
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timex.h | File | 767 B | 0644 |
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tlb.h | File | 781 B | 0644 |
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tlbflush.h | File | 5.53 KB | 0644 |
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traps.h | File | 627 B | 0644 |
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uaccess.h | File | 1.33 KB | 0644 |
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