63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
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/*
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* Copyright (C) 2012-2017 ARM Limited or its affiliates.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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/*!
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* \file cc_bitops.h
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* Bit fields 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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#define BITMASK(mask_size) (((mask_size) < 32) ? \
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((1UL << (mask_size)) - 1) : 0xFFFFFFFFUL)
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#define BITMASK_AT(mask_size, mask_offset) (BITMASK(mask_size) << (mask_offset))
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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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#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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/* 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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#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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#define SWAP_TO_LE(word) word
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#define SWAP_TO_BE(word) SWAP_ENDIAN(word)
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#endif
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/* 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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#define IS_NULL_ADDR(adr) \
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(!(adr))
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#endif /*_CC_BITOPS_H_*/
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