1
2#ifndef __LINUX_BITS_H
3#define __LINUX_BITS_H
4
5#include <linux/const.h>
6#include <vdso/bits.h>
7#include <asm/bitsperlong.h>
8
9#define BIT_ULL(nr) (ULL(1) << (nr))
10#define BIT_MASK(nr) (UL(1) << ((nr) % BITS_PER_LONG))
11#define BIT_WORD(nr) ((nr) / BITS_PER_LONG)
12#define BIT_ULL_MASK(nr) (ULL(1) << ((nr) % BITS_PER_LONG_LONG))
13#define BIT_ULL_WORD(nr) ((nr) / BITS_PER_LONG_LONG)
14#define BITS_PER_BYTE 8
15
16
17
18
19
20
21#if !defined(__ASSEMBLY__)
22#include <linux/build_bug.h>
23#define GENMASK_INPUT_CHECK(h, l) \
24 (BUILD_BUG_ON_ZERO(__builtin_choose_expr( \
25 __is_constexpr((l) > (h)), (l) > (h), 0)))
26#else
27
28
29
30
31#define GENMASK_INPUT_CHECK(h, l) 0
32#endif
33
34#define __GENMASK(h, l) \
35 (((~UL(0)) - (UL(1) << (l)) + 1) & \
36 (~UL(0) >> (BITS_PER_LONG - 1 - (h))))
37#define GENMASK(h, l) \
38 (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
39
40#define __GENMASK_ULL(h, l) \
41 (((~ULL(0)) - (ULL(1) << (l)) + 1) & \
42 (~ULL(0) >> (BITS_PER_LONG_LONG - 1 - (h))))
43#define GENMASK_ULL(h, l) \
44 (GENMASK_INPUT_CHECK(h, l) + __GENMASK_ULL(h, l))
45
46#endif
47