kernel/include/linux/packing.h

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright 2016-2018 NXP
 * Copyright (c) 2018-2019, Vladimir Oltean <olteanv@gmail.com>
 */
#ifndef _LINUX_PACKING_H
#define _LINUX_PACKING_H

#include <linux/types.h>
#include <linux/bitops.h>

#define QUIRK_MSB_ON_THE_RIGHT	BIT(0)
#define QUIRK_LITTLE_ENDIAN	BIT(1)
#define QUIRK_LSW32_IS_FIRST	BIT(2)

enum packing_op {
	PACK,
	UNPACK,
};

int packing(void *pbuf, u64 *uval, int startbit, int endbit, size_t pbuflen,
	    enum packing_op op, u8 quirks);

int pack(void *pbuf, u64 uval, size_t startbit, size_t endbit, size_t pbuflen,
	 u8 quirks);

int unpack(const void *pbuf, u64 *uval, size_t startbit, size_t endbit,
	   size_t pbuflen, u8 quirks);

#endif