diff options
| author | Tony Lindgren <[email protected]> | 2018-11-08 09:57:42 -0800 |
|---|---|---|
| committer | Tony Lindgren <[email protected]> | 2018-11-08 09:57:42 -0800 |
| commit | 07fa3fa2572f2dee85beb8137f90ccf33d7206af (patch) | |
| tree | 0cec1fca7425cd6c423c53c4581ea2a9776ed411 /tools/include/linux/bits.h | |
| parent | 4ed0dfe3cf39a97cd0ed532212b5e55e9752fe3f (diff) | |
| parent | 651022382c7f8da46cb4872a545ee1da6d097d2a (diff) | |
Merge tag 'v4.20-rc1' into omap-for-v4.21/dt-ti-sysc
Linux 4.20-rc1
Diffstat (limited to 'tools/include/linux/bits.h')
| -rw-r--r-- | tools/include/linux/bits.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/tools/include/linux/bits.h b/tools/include/linux/bits.h new file mode 100644 index 000000000000..2b7b532c1d51 --- /dev/null +++ b/tools/include/linux/bits.h @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __LINUX_BITS_H +#define __LINUX_BITS_H +#include <asm/bitsperlong.h> + +#define BIT(nr) (1UL << (nr)) +#define BIT_ULL(nr) (1ULL << (nr)) +#define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG)) +#define BIT_WORD(nr) ((nr) / BITS_PER_LONG) +#define BIT_ULL_MASK(nr) (1ULL << ((nr) % BITS_PER_LONG_LONG)) +#define BIT_ULL_WORD(nr) ((nr) / BITS_PER_LONG_LONG) +#define BITS_PER_BYTE 8 + +/* + * Create a contiguous bitmask starting at bit position @l and ending at + * position @h. For example + * GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000. + */ +#define GENMASK(h, l) \ + (((~0UL) - (1UL << (l)) + 1) & (~0UL >> (BITS_PER_LONG - 1 - (h)))) + +#define GENMASK_ULL(h, l) \ + (((~0ULL) - (1ULL << (l)) + 1) & \ + (~0ULL >> (BITS_PER_LONG_LONG - 1 - (h)))) + +#endif /* __LINUX_BITS_H */ |