1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux 1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* const.h: Macros for dealing with constants. 2 /* const.h: Macros for dealing with constants. */ 3 3 4 #ifndef _UAPI_LINUX_CONST_H 4 #ifndef _UAPI_LINUX_CONST_H 5 #define _UAPI_LINUX_CONST_H 5 #define _UAPI_LINUX_CONST_H 6 6 7 /* Some constant macros are used in both assem 7 /* Some constant macros are used in both assembler and 8 * C code. Therefore we cannot annotate them 8 * C code. Therefore we cannot annotate them always with 9 * 'UL' and other type specifiers unilaterally 9 * 'UL' and other type specifiers unilaterally. We 10 * use the following macros to deal with this. 10 * use the following macros to deal with this. 11 * 11 * 12 * Similarly, _AT() will cast an expression wi 12 * Similarly, _AT() will cast an expression with a type in C, but 13 * leave it unchanged in asm. 13 * leave it unchanged in asm. 14 */ 14 */ 15 15 16 #ifdef __ASSEMBLY__ 16 #ifdef __ASSEMBLY__ 17 #define _AC(X,Y) X 17 #define _AC(X,Y) X 18 #define _AT(T,X) X 18 #define _AT(T,X) X 19 #else 19 #else 20 #define __AC(X,Y) (X##Y) 20 #define __AC(X,Y) (X##Y) 21 #define _AC(X,Y) __AC(X,Y) 21 #define _AC(X,Y) __AC(X,Y) 22 #define _AT(T,X) ((T)(X)) 22 #define _AT(T,X) ((T)(X)) 23 #endif 23 #endif 24 24 25 #define _UL(x) (_AC(x, UL)) 25 #define _UL(x) (_AC(x, UL)) 26 #define _ULL(x) (_AC(x, ULL)) 26 #define _ULL(x) (_AC(x, ULL)) 27 27 28 #define _BITUL(x) (_UL(1) << (x)) 28 #define _BITUL(x) (_UL(1) << (x)) 29 #define _BITULL(x) (_ULL(1) << (x)) 29 #define _BITULL(x) (_ULL(1) << (x)) 30 30 31 #if !defined(__ASSEMBLY__) << 32 /* << 33 * Missing asm support << 34 * << 35 * __BIT128() would not work in the asm code, << 36 * 'unsigned __init128' data type as direct re << 37 * 128 bit constants is not supported in the g << 38 * they get silently truncated. << 39 * << 40 * TODO: Please revisit this implementation wh << 41 * starts representing 128 bit constants direc << 42 * and unsigned long etc. Subsequently drop th << 43 * GENMASK_U128() which would then start suppo << 44 */ << 45 #define _BIT128(x) ((unsigned __int128)(1 << 46 #endif << 47 << 48 #define __ALIGN_KERNEL(x, a) __ALIG << 49 #define __ALIGN_KERNEL_MASK(x, mask) (((x) << 50 << 51 #define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d << 52 << 53 #endif /* _UAPI_LINUX_CONST_H */ 31 #endif /* _UAPI_LINUX_CONST_H */ 54 32
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