^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #ifndef __LINUX_BITS_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #define __LINUX_BITS_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/const.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <vdso/bits.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <asm/bitsperlong.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #define BIT_ULL(nr) (ULL(1) << (nr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define BIT_MASK(nr) (UL(1) << ((nr) % BITS_PER_LONG))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define BIT_WORD(nr) ((nr) / BITS_PER_LONG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define BIT_ULL_MASK(nr) (ULL(1) << ((nr) % BITS_PER_LONG_LONG))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define BIT_ULL_WORD(nr) ((nr) / BITS_PER_LONG_LONG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define BITS_PER_BYTE 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * Create a contiguous bitmask starting at bit position @l and ending at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * position @h. For example
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #if !defined(__ASSEMBLY__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/build_bug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define GENMASK_INPUT_CHECK(h, l) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) (BUILD_BUG_ON_ZERO(__builtin_choose_expr( \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) __is_constexpr((l) > (h)), (l) > (h), 0)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * BUILD_BUG_ON_ZERO is not available in h files included from asm files,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * disable the input check if that is the case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define GENMASK_INPUT_CHECK(h, l) 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define __GENMASK(h, l) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) (((~UL(0)) - (UL(1) << (l)) + 1) & \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) (~UL(0) >> (BITS_PER_LONG - 1 - (h))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define GENMASK(h, l) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define __GENMASK_ULL(h, l) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) (((~ULL(0)) - (ULL(1) << (l)) + 1) & \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) (~ULL(0) >> (BITS_PER_LONG_LONG - 1 - (h))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define GENMASK_ULL(h, l) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) (GENMASK_INPUT_CHECK(h, l) + __GENMASK_ULL(h, l))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #endif /* __LINUX_BITS_H */