acrn-hypervisor/hypervisor/include/lib/util.h

/*
 * Copyright (C) 2018 Intel Corporation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   * Neither the name of Intel Corporation nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef UTIL_H
#define UTIL_H

/** Add an offset (in bytes) to an (base)address.
 *
 *  @param  addr Baseaddress
 *  @param  off  Offset
 *  @return Returns baseaddress + offset in bytes.
 */
#define ADD_OFFSET(addr, off) (void *)(((uint8_t *)(addr))+(off))

#define offsetof(st, m) __builtin_offsetof(st, m)

/** Round an integer (x) up to a multiple of y */
#define INT_ROUNDUP(x, y)     (((x)+((y)-1))&-(y))

/** Round an integer up to a multiple of 4 */
#define INT_ROUNDUP4(x)      INT_ROUNDUP(x, 4)

/** Round an integer up to a multiple of 8 */
#define INT_ROUNDUP8(x)      INT_ROUNDUP(x, 8)

/** Round an integer up to a multiple of 8 */
#define INT_ROUNDUP16(x)     INT_ROUNDUP(x, 16)

/** Roundup (x/y) to ( x/y + (x%y) ? 1 : 0) **/
#define INT_DIV_ROUNDUP(x, y)	(((x)+(y)-1)/(y))

#define min(x, y)	((x) < (y)) ? (x) : (y)

#define max(x, y)	((x) < (y)) ? (y) : (x)

#endif /* UTIL_H */