From c9c06167e7933d93a6e396174c68abf242294abb Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Wed, 10 Jan 2001 05:27:25 +0000 Subject: Merge with Linux 2.4.0-test12. --- include/asm-parisc/delay.h | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 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 000000000..705c4a792 --- /dev/null +++ b/include/asm-parisc/delay.h @@ -0,0 +1,45 @@ +#ifndef _PARISC_DELAY_H +#define _PARISC_DELAY_H + +#include /* for mfctl() */ +#include /* for boot_cpu_data */ + + +/* + * Copyright (C) 1993 Linus Torvalds + * + * Delay routines + */ + +extern unsigned long loops_per_sec; + +static __inline__ void __delay(unsigned long loops) { + asm volatile( + " .balignl 64,0x34000034 + addib,UV -1,%0,. + nop" + : "=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 v1.2.3