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26 lines
833 B
26 lines
833 B
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __LINUX_BITS_H |
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#define __LINUX_BITS_H |
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#include <asm/bitsperlong.h> |
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#define BIT(nr) (1UL << (nr)) |
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#define BIT_ULL(nr) (1ULL << (nr)) |
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#define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG)) |
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#define BIT_WORD(nr) ((nr) / BITS_PER_LONG) |
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#define BIT_ULL_MASK(nr) (1ULL << ((nr) % BITS_PER_LONG_LONG)) |
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#define BIT_ULL_WORD(nr) ((nr) / BITS_PER_LONG_LONG) |
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#define BITS_PER_BYTE 8 |
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/* |
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* Create a contiguous bitmask starting at bit position @l and ending at |
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* position @h. For example |
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* GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000. |
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*/ |
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#define GENMASK(h, l) \ |
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(((~0UL) - (1UL << (l)) + 1) & (~0UL >> (BITS_PER_LONG - 1 - (h)))) |
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#define GENMASK_ULL(h, l) \ |
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(((~0ULL) - (1ULL << (l)) + 1) & \ |
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(~0ULL >> (BITS_PER_LONG_LONG - 1 - (h)))) |
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#endif /* __LINUX_BITS_H */
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