/*
 * 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. See the file COPYING
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * Copyright (C) 2010 Frank van Maarseveen <frankvm@frankvm.com>
 */

#ifndef _DELAY_H_
#define _DELAY_H_

#include <stdint.h>

#if MHZ == 4

__attribute__((always_inline))
static inline void udelay(uint8_t us)
{
	if (us) {
		asm volatile(	"1:	dec %0"		/* 1 */
				"\n	nop"		/* 1 */
				"\n	brne 1b"	/* 2 */
				: "=r"(us) : "0"(us) );
	}
}

#else

void udelay(uint8_t us);

#endif

#endif