1*c2e0c6b5SAndroid Build Coastguard Worker /* 2*c2e0c6b5SAndroid Build Coastguard Worker * The PCI Utilities -- Decode bits and bit fields 3*c2e0c6b5SAndroid Build Coastguard Worker * 4*c2e0c6b5SAndroid Build Coastguard Worker * Copyright (c) 2023 Martin Mares <[email protected]> 5*c2e0c6b5SAndroid Build Coastguard Worker * Copyright (c) 2023 KNS Group LLC (YADRO) 6*c2e0c6b5SAndroid Build Coastguard Worker * 7*c2e0c6b5SAndroid Build Coastguard Worker * Can be freely distributed and used under the terms of the GNU GPL v2+. 8*c2e0c6b5SAndroid Build Coastguard Worker * 9*c2e0c6b5SAndroid Build Coastguard Worker * SPDX-License-Identifier: GPL-2.0-or-later 10*c2e0c6b5SAndroid Build Coastguard Worker */ 11*c2e0c6b5SAndroid Build Coastguard Worker 12*c2e0c6b5SAndroid Build Coastguard Worker #ifndef _BITOPS_H 13*c2e0c6b5SAndroid Build Coastguard Worker #define _BITOPS_H 14*c2e0c6b5SAndroid Build Coastguard Worker 15*c2e0c6b5SAndroid Build Coastguard Worker #ifndef _PCI_LIB_H 16*c2e0c6b5SAndroid Build Coastguard Worker #error Import only from pci.h 17*c2e0c6b5SAndroid Build Coastguard Worker #endif 18*c2e0c6b5SAndroid Build Coastguard Worker 19*c2e0c6b5SAndroid Build Coastguard Worker /* Useful macros for decoding of bits and bit fields */ 20*c2e0c6b5SAndroid Build Coastguard Worker 21*c2e0c6b5SAndroid Build Coastguard Worker #define FLAG(x, y) ((x & y) ? '+' : '-') 22*c2e0c6b5SAndroid Build Coastguard Worker 23*c2e0c6b5SAndroid Build Coastguard Worker // Generate mask 24*c2e0c6b5SAndroid Build Coastguard Worker 25*c2e0c6b5SAndroid Build Coastguard Worker #define BIT(at) ((u64)1 << (at)) 26*c2e0c6b5SAndroid Build Coastguard Worker // Boundaries inclusive 27*c2e0c6b5SAndroid Build Coastguard Worker #define MASK(h, l) ((((u64)1 << ((h) + 1)) - 1) & ~(((u64)1 << (l)) - 1)) 28*c2e0c6b5SAndroid Build Coastguard Worker 29*c2e0c6b5SAndroid Build Coastguard Worker // Get/set from register 30*c2e0c6b5SAndroid Build Coastguard Worker 31*c2e0c6b5SAndroid Build Coastguard Worker #define BITS(x, at, width) (((x) >> (at)) & ((1 << (width)) - 1)) 32*c2e0c6b5SAndroid Build Coastguard Worker #define GET_REG_MASK(reg, mask) (((reg) & (mask)) / ((mask) & ~((mask) << 1))) 33*c2e0c6b5SAndroid Build Coastguard Worker #define SET_REG_MASK(reg, mask, val) \ 34*c2e0c6b5SAndroid Build Coastguard Worker (((reg) & ~(mask)) | (((val) * ((mask) & ~((mask) << 1))) & (mask))) 35*c2e0c6b5SAndroid Build Coastguard Worker 36*c2e0c6b5SAndroid Build Coastguard Worker #define TABLE(tab, x, buf) \ 37*c2e0c6b5SAndroid Build Coastguard Worker ((x) < sizeof(tab) / sizeof((tab)[0]) ? (tab)[x] : (sprintf((buf), "??%d", (x)), (buf))) 38*c2e0c6b5SAndroid Build Coastguard Worker 39*c2e0c6b5SAndroid Build Coastguard Worker #endif 40