11ffd04a8SMartin Mares /* 21ffd04a8SMartin Mares * The PCI Utilities -- Decode bits and bit fields 31ffd04a8SMartin Mares * 41ffd04a8SMartin Mares * Copyright (c) 2023 Martin Mares <[email protected]> 51ffd04a8SMartin Mares * Copyright (c) 2023 KNS Group LLC (YADRO) 61ffd04a8SMartin Mares * 71ffd04a8SMartin Mares * Can be freely distributed and used under the terms of the GNU GPL v2+. 81ffd04a8SMartin Mares * 91ffd04a8SMartin Mares * SPDX-License-Identifier: GPL-2.0-or-later 101ffd04a8SMartin Mares */ 111ffd04a8SMartin Mares 121ffd04a8SMartin Mares #ifndef _BITOPS_H 131ffd04a8SMartin Mares #define _BITOPS_H 141ffd04a8SMartin Mares 151ffd04a8SMartin Mares #ifndef _PCI_LIB_H 161ffd04a8SMartin Mares #error Import only from pci.h 171ffd04a8SMartin Mares #endif 181ffd04a8SMartin Mares 191ffd04a8SMartin Mares /* Useful macros for decoding of bits and bit fields */ 201ffd04a8SMartin Mares 211ffd04a8SMartin Mares #define FLAG(x, y) ((x & y) ? '+' : '-') 221ffd04a8SMartin Mares 231ffd04a8SMartin Mares // Generate mask 241ffd04a8SMartin Mares 251ffd04a8SMartin Mares #define BIT(at) ((u64)1 << (at)) 261ffd04a8SMartin Mares // Boundaries inclusive 271ffd04a8SMartin Mares #define MASK(h, l) ((((u64)1 << ((h) + 1)) - 1) & ~(((u64)1 << (l)) - 1)) 281ffd04a8SMartin Mares 291ffd04a8SMartin Mares // Get/set from register 301ffd04a8SMartin Mares 311ffd04a8SMartin Mares #define BITS(x, at, width) (((x) >> (at)) & ((1 << (width)) - 1)) 321ffd04a8SMartin Mares #define GET_REG_MASK(reg, mask) (((reg) & (mask)) / ((mask) & ~((mask) << 1))) 331ffd04a8SMartin Mares #define SET_REG_MASK(reg, mask, val) \ 341ffd04a8SMartin Mares (((reg) & ~(mask)) | (((val) * ((mask) & ~((mask) << 1))) & (mask))) 351ffd04a8SMartin Mares 361ffd04a8SMartin Mares #define TABLE(tab, x, buf) \ 37*a213399fSMingjie Shen ((x) < sizeof(tab) / sizeof((tab)[0]) ? (tab)[x] : (snprintf((buf), sizeof(buf), "??%d", (x)), (buf))) 381ffd04a8SMartin Mares 391ffd04a8SMartin Mares #endif 40