From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/asm-parisc/delay.h | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 include/asm-parisc/delay.h (limited to 'include/asm-parisc/delay.h') diff --git a/include/asm-parisc/delay.h b/include/asm-parisc/delay.h new file mode 100644 index 00000000000..7a75e984674 --- /dev/null +++ b/include/asm-parisc/delay.h @@ -0,0 +1,43 @@ +#ifndef _PARISC_DELAY_H +#define _PARISC_DELAY_H + +#include /* for mfctl() */ +#include /* for boot_cpu_data */ + + +/* + * Copyright (C) 1993 Linus Torvalds + * + * Delay routines + */ + +static __inline__ void __delay(unsigned long loops) { + asm volatile( + " .balignl 64,0x34000034\n" + " addib,UV -1,%0,.\n" + " nop\n" + : "=r" (loops) : "0" (loops)); +} + +static __inline__ void __cr16_delay(unsigned long clocks) { + unsigned long start; + + /* + * Note: Due to unsigned math, cr16 rollovers shouldn't be + * a problem here. However, on 32 bit, we need to make sure + * we don't pass in too big a value. The current default + * value of MAX_UDELAY_MS should help prevent this. + */ + + start = mfctl(16); + while ((mfctl(16) - start) < clocks) + ; +} + +static __inline__ void __udelay(unsigned long usecs) { + __cr16_delay(usecs * ((unsigned long)boot_cpu_data.cpu_hz / 1000000UL)); +} + +#define udelay(n) __udelay(n) + +#endif /* defined(_PARISC_DELAY_H) */ -- cgit