/* delay.h: FRV delay code * * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _ASM_DELAY_H#define _ASM_DELAY_H #include <asm/param.h>#include <asm/timer-regs.h> /* * delay loop - runs at __core_clock_speed_HZ / 2 [there are 2 insns in the loop] */extern unsigned long __delay_loops_MHz; static inline void __delay(unsigned long loops){	asm volatile("1:	subicc	%0,#1,%0,icc0	\n"		     "		bnc	icc0,#2,1b	\n"		     : "=r" (loops)		     : "0" (loops)		     : "icc0"		     );} /* * 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 unsigned long loops_per_jiffy; static inline void udelay(unsigned long usecs){	__delay(usecs * __delay_loops_MHz);} #define ndelay(n)	udelay((n) * 5) #endif /* _ASM_DELAY_H */