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 4*b6589117SArnaldo Carvalho de Melo 5*b6589117SArnaldo Carvalho de Melo #include <linux/const.h> 6ba4aa02bSArnaldo Carvalho de Melo #include <asm/bitsperlong.h> 7ba4aa02bSArnaldo Carvalho de Melo 8*b6589117SArnaldo Carvalho de Melo #define BIT(nr) (UL(1) << (nr)) 9*b6589117SArnaldo Carvalho de Melo #define BIT_ULL(nr) (ULL(1) << (nr)) 10*b6589117SArnaldo 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) 12*b6589117SArnaldo 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 */ 21ba4aa02bSArnaldo Carvalho de Melo #define GENMASK(h, l) \ 22*b6589117SArnaldo Carvalho de Melo (((~UL(0)) - (UL(1) << (l)) + 1) & \ 23*b6589117SArnaldo Carvalho de Melo (~UL(0) >> (BITS_PER_LONG - 1 - (h)))) 24ba4aa02bSArnaldo Carvalho de Melo 25ba4aa02bSArnaldo Carvalho de Melo #define GENMASK_ULL(h, l) \ 26*b6589117SArnaldo Carvalho de Melo (((~ULL(0)) - (ULL(1) << (l)) + 1) & \ 27*b6589117SArnaldo Carvalho de Melo (~ULL(0) >> (BITS_PER_LONG_LONG - 1 - (h)))) 28ba4aa02bSArnaldo Carvalho de Melo 29ba4aa02bSArnaldo Carvalho de Melo #endif /* __LINUX_BITS_H */ 30