drivers/staging/ccree/cc_bitops.h

/*
 * Copyright (C) 2012-2017 ARM Limited or its affiliates.
 * 
 * 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.
 * 
 * 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.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

/*!
 * \file cc_bitops.h
 * Bit fields operations macros.
 */
#ifndef _CC_BITOPS_H_
#define _CC_BITOPS_H_

#define BITMASK(mask_size) (((mask_size) < 32) ?	\
	((1UL << (mask_size)) - 1) : 0xFFFFFFFFUL)
#define BITMASK_AT(mask_size, mask_offset) (BITMASK(mask_size) << (mask_offset))

#define BITFIELD_GET(word, bit_offset, bit_size) \
	(((word) >> (bit_offset)) & BITMASK(bit_size))
#define BITFIELD_SET(word, bit_offset, bit_size, new_val)   do {    \
	word = ((word) & ~BITMASK_AT(bit_size, bit_offset)) |	    \
		(((new_val) & BITMASK(bit_size)) << (bit_offset));  \
} while (0)

/* Is val aligned to "align" ("align" must be power of 2) */
#ifndef IS_ALIGNED
#define IS_ALIGNED(val, align)		\
	(((uintptr_t)(val) & ((align) - 1)) == 0)
#endif

#define SWAP_ENDIAN(word)		\
	(((word) >> 24) | (((word) & 0x00FF0000) >> 8) | \
	(((word) & 0x0000FF00) << 8) | (((word) & 0x000000FF) << 24))

#ifdef BIG__ENDIAN
#define SWAP_TO_LE(word) SWAP_ENDIAN(word)
#define SWAP_TO_BE(word) word
#else
#define SWAP_TO_LE(word) word
#define SWAP_TO_BE(word) SWAP_ENDIAN(word)
#endif



/* Is val a multiple of "mult" ("mult" must be power of 2) */
#define IS_MULT(val, mult)              \
	(((val) & ((mult) - 1)) == 0)

#define IS_NULL_ADDR(adr)		\
	(!(adr))

#endif /*_CC_BITOPS_H_*/