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/*
* The PCI Utilities -- Decode bits and bit fields
*
* Copyright (c) 2023 Martin Mares <mj@ucw.cz>
* Copyright (c) 2023 KNS Group LLC (YADRO)
*
* Can be freely distributed and used under the terms of the GNU GPL v2+.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef _BITOPS_H
#define _BITOPS_H
#ifndef _PCI_LIB_H
#error Import only from pci.h
#endif
/* Useful macros for decoding of bits and bit fields */
#define FLAG(x, y) ((x & y) ? '+' : '-')
// Generate mask
#define BIT(at) ((u64)1 << (at))
// Boundaries inclusive
#define MASK(h, l) ((((u64)1 << ((h) + 1)) - 1) & ~(((u64)1 << (l)) - 1))
// Get/set from register
#define BITS(x, at, width) (((x) >> (at)) & ((1 << (width)) - 1))
#define GET_REG_MASK(reg, mask) (((reg) & (mask)) / ((mask) & ~((mask) << 1)))
#define SET_REG_MASK(reg, mask, val) \
(((reg) & ~(mask)) | (((val) * ((mask) & ~((mask) << 1))) & (mask)))
#define TABLE(tab, x, buf) \
((x) < sizeof(tab) / sizeof((tab)[0]) ? (tab)[x] : (snprintf((buf), sizeof(buf), "??%d", (x)), (buf)))
#endif
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