/*
 * Copyright (c) 2007-2017 Allwinnertech Co., Ltd.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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.
 *
 */

/*
*********************************************************************************************************
*                                                    LINUX-KERNEL
*                                        AllWinner Linux Platform Develop Kits
*                                                   Kernel Module
*
*                                    (c) Copyright 2006-2011, kevin.z China
*                                             All Rights Reserved
*
* File    : common.h
* By      : kevin.z
* Version : v1.0
* Date    : 2011-5-30 17:21
* Descript: common lib for standby.
* Update  : date                auther      ver     notes
*********************************************************************************************************
*/
#ifndef __COMMON_H__
#define __COMMON_H__

static inline __u64 standby_uldiv(__u64 dividend, __u32 divisior)
{
	__u64 tmpDiv = (__u64) divisior;
	__u64 tmpQuot = 0;
	__s32 shift = 0;

	if (!divisior) {
		/* divide 0 error abort */
		return 0;
	}

	while (!(tmpDiv & ((__u64) 1 << 63))) {
		tmpDiv <<= 1;
		shift++;
	}

	do {
		if (dividend >= tmpDiv) {
			dividend -= tmpDiv;
			tmpQuot = (tmpQuot << 1) | 1;
		} else {
			tmpQuot = (tmpQuot << 1) | 0;
		}
		tmpDiv >>= 1;
		shift--;
	} while (shift >= 0)
		;

	return tmpQuot;
}

void standby_memcpy(void *dest, void *src, int n);
void standby_delay_cycle(int cycle);

#endif	/*__COMMON_H__*/