/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1994 by Waldorf Electronics
 * Copyright (C) 1995 - 2000, 01, 03 by Ralf Baechle
 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
 * Copyright (C) 2007  Maciej W. Rozycki
 */
#ifndef _ASM_DELAY_H
#define _ASM_DELAY_H

#include <linux/param.h>
#include <linux/smp.h>

#include <asm/compiler.h>
#include <asm/war.h>

static inline void __delay(unsigned int loops)
{
	__asm__ __volatile__ (
	"	.set	noreorder				\n"
	"	.align	3					\n"
	"1:	bnez	%0, 1b					\n"
	"	subu	%0, 1					\n"
	"	.set	reorder					\n"
	: "=r" (loops)
	: "0" (loops));
}


static inline void __udelay(unsigned long us, unsigned long lpj) {
	__delay((us * 0x000010c7ull * HZ * lpj) >> 32);
}

static inline void __ndelay(unsigned long ns, unsigned long lpj) {
	__delay((ns * 0x00000005ull * HZ * lpj) >> 32);
}

#define __udelay_val cpu_data[raw_smp_processor_id()].udelay_val

#define udelay(usecs) __udelay((usecs), __udelay_val)

/* make sure "usecs *= ..." in udelay do not overflow. */
#if HZ >= 1000
#define MAX_UDELAY_MS	1
#elif HZ <= 200
#define MAX_UDELAY_MS	5
#else
#define MAX_UDELAY_MS	(1000 / HZ)
#endif

#endif /* _ASM_DELAY_H */