drivers/staging/sep54/dx_bitops.h

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* (c) Copyright 2011-2012 Discretix Technologies Ltd.              *
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* Free Software Foundation.                                        *
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********************************************************************/

/*!
 * \file dx_bitops.h
 * Bit fields operations macros.
 */
#ifndef _DX_BITOPS_H_
#define _DX_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) \
	(word = ((word) & ~BITMASK_AT(bit_size, bit_offset)) |		\
		(((new_val) & BITMASK(bit_size)) << (bit_offset)))

/* Is val aligned to "align" ("align" must be power of 2) */
#ifndef IS_ALIGNED
#define IS_ALIGNED(val, align)	(((u32)(val) & ((align) - 1)) == 0)
#endif

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

/* 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 /*_DX_BITOPS_H_*/