69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
/*
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* Copyright (c) 2001-2019, Arm Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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/*! @file
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@brief This file defines bit-field operations macros.
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*/
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#ifndef _CC_BITOPS_H_
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#define _CC_BITOPS_H_
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/*! Defintion of number of 32bit maximum value. */
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#define CC_32BIT_MAX_VALUE (0xFFFFFFFFUL)
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/*! Definition for bitmask */
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#define BITMASK(mask_size) (((mask_size) < 32) ? \
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((1UL << (mask_size)) - 1) : 0xFFFFFFFFUL)
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/*! Definition for bitmask in a given offset. */
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#define BITMASK_AT(mask_size, mask_offset) (BITMASK(mask_size) << (mask_offset))
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/*! Definition for getting bits value from a word. */
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#define BITFIELD_GET(word, bit_offset, bit_size) \
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(((word) >> (bit_offset)) & BITMASK(bit_size))
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/*! Definition for setting bits value from a word. */
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#define BITFIELD_SET(word, bit_offset, bit_size, new_val) do { \
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word = ((word) & ~BITMASK_AT(bit_size, bit_offset)) | \
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(((new_val) & BITMASK(bit_size)) << (bit_offset)); \
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} while (0)
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/*!Definition for is val aligned to "align" ("align" must be power of 2). */
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#ifndef IS_ALIGNED
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#define IS_ALIGNED(val, align) \
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(((uintptr_t)(val) & ((align) - 1)) == 0)
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#endif
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/*!Definition swap endianity for 32 bits word. */
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#define SWAP_ENDIAN(word) \
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(((word) >> 24) | (((word) & 0x00FF0000) >> 8) | \
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(((word) & 0x0000FF00) << 8) | (((word) & 0x000000FF) << 24))
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#ifdef BIG__ENDIAN
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#define SWAP_TO_LE(word) SWAP_ENDIAN(word)
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#define SWAP_TO_BE(word) word
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#else
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/*! Definition for swapping to LE. */
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#define SWAP_TO_LE(word) word
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/*! Definition for swapping to BE. */
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#define SWAP_TO_BE(word) SWAP_ENDIAN(word)
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#endif
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/*!Align X to uint32_t size. */
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#ifndef ALIGN_TO_4BYTES
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#define ALIGN_TO_4BYTES(x) (((unsigned long)(x) + (CC_32BIT_WORD_SIZE-1)) & ~(CC_32BIT_WORD_SIZE-1))
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#endif
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/*! Definition for is val a multiple of "mult" ("mult" must be power of 2). */
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#define IS_MULT(val, mult) \
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(((val) & ((mult) - 1)) == 0)
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/*! Definition for is NULL address. */
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#define IS_NULL_ADDR(adr) \
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(!(adr))
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#endif /*_CC_BITOPS_H_*/
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