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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 18:30:56 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 18:30:56 +0000 |
commit | d3114e0edc60508fc1e44e6cd2733fb2a97cdaca (patch) | |
tree | 82d66db664dea6ee75010455b98b04f47fcc4a90 /bitops.h | |
parent | Initial commit. (diff) | |
download | pciutils-d3114e0edc60508fc1e44e6cd2733fb2a97cdaca.tar.xz pciutils-d3114e0edc60508fc1e44e6cd2733fb2a97cdaca.zip |
Adding upstream version 1:3.11.1.upstream/1%3.11.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'bitops.h')
-rw-r--r-- | bitops.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/bitops.h b/bitops.h new file mode 100644 index 0000000..029741e --- /dev/null +++ b/bitops.h @@ -0,0 +1,39 @@ +/* + * 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] : (sprintf((buf), "??%d", (x)), (buf))) + +#endif |