1ba4aa02bSArnaldo Carvalho de Melo /* SPDX-License-Identifier: GPL-2.0 */ 2ba4aa02bSArnaldo Carvalho de Melo #ifndef __LINUX_BITS_H 3ba4aa02bSArnaldo Carvalho de Melo #define __LINUX_BITS_H 4b6589117SArnaldo Carvalho de Melo 5b6589117SArnaldo Carvalho de Melo #include <linux/const.h> 6e3698b23SArnaldo Carvalho de Melo #include <vdso/bits.h> 7*450f941eSArnaldo Carvalho de Melo #include <uapi/linux/bits.h> 8ba4aa02bSArnaldo Carvalho de Melo #include <asm/bitsperlong.h> 9ba4aa02bSArnaldo Carvalho de Melo 10b6589117SArnaldo Carvalho de Melo #define BIT_MASK(nr) (UL(1) << ((nr) % BITS_PER_LONG)) 11ba4aa02bSArnaldo Carvalho de Melo #define BIT_WORD(nr) ((nr) / BITS_PER_LONG) 12b6589117SArnaldo Carvalho de Melo #define BIT_ULL_MASK(nr) (ULL(1) << ((nr) % BITS_PER_LONG_LONG)) 13ba4aa02bSArnaldo Carvalho de Melo #define BIT_ULL_WORD(nr) ((nr) / BITS_PER_LONG_LONG) 14ba4aa02bSArnaldo Carvalho de Melo #define BITS_PER_BYTE 8 15ba4aa02bSArnaldo Carvalho de Melo 16ba4aa02bSArnaldo Carvalho de Melo /* 17ba4aa02bSArnaldo Carvalho de Melo * Create a contiguous bitmask starting at bit position @l and ending at 18ba4aa02bSArnaldo Carvalho de Melo * position @h. For example 19ba4aa02bSArnaldo Carvalho de Melo * GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000. 20ba4aa02bSArnaldo Carvalho de Melo */ 216ec4476aSLinus Torvalds #if !defined(__ASSEMBLY__) 22e3698b23SArnaldo Carvalho de Melo #include <linux/build_bug.h> 23e3698b23SArnaldo Carvalho de Melo #define GENMASK_INPUT_CHECK(h, l) \ 24e3698b23SArnaldo Carvalho de Melo (BUILD_BUG_ON_ZERO(__builtin_choose_expr( \ 25f747e666SRikard Falkeborn __is_constexpr((l) > (h)), (l) > (h), 0))) 26e3698b23SArnaldo Carvalho de Melo #else 27e3698b23SArnaldo Carvalho de Melo /* 28e3698b23SArnaldo Carvalho de Melo * BUILD_BUG_ON_ZERO is not available in h files included from asm files, 29e3698b23SArnaldo Carvalho de Melo * disable the input check if that is the case. 30e3698b23SArnaldo Carvalho de Melo */ 31e3698b23SArnaldo Carvalho de Melo #define GENMASK_INPUT_CHECK(h, l) 0 32e3698b23SArnaldo Carvalho de Melo #endif 33e3698b23SArnaldo Carvalho de Melo 34e3698b23SArnaldo Carvalho de Melo #define GENMASK(h, l) \ 35e3698b23SArnaldo Carvalho de Melo (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l)) 36e3698b23SArnaldo Carvalho de Melo #define GENMASK_ULL(h, l) \ 37e3698b23SArnaldo Carvalho de Melo (GENMASK_INPUT_CHECK(h, l) + __GENMASK_ULL(h, l)) 38ba4aa02bSArnaldo Carvalho de Melo 39ba4aa02bSArnaldo Carvalho de Melo #endif /* __LINUX_BITS_H */ 40