ceph/src/seastar/dpdk/drivers/bus/dpaa/include/dpaa_bits.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  *   Copyright 2017 NXP
   4  *
   5  */
   6
   7 #ifndef __DPAA_BITS_H
   8 #define __DPAA_BITS_H
   9
  10 /* Bitfield stuff. */
  11 #define BITS_PER_ULONG  (sizeof(unsigned long) << 3)
  12 #define SHIFT_PER_ULONG (((1 << 5) == BITS_PER_ULONG) ? 5 : 6)
  13 #define BITS_MASK(idx)  (1UL << ((idx) & (BITS_PER_ULONG - 1)))
  14 #define BITS_IDX(idx)   ((idx) >> SHIFT_PER_ULONG)
  15
  16 static inline void dpaa_set_bits(unsigned long mask,
  17                                  volatile unsigned long *p)
  18 {
  19         *p |= mask;
  20 }
  21
  22 static inline void dpaa_set_bit(int idx, volatile unsigned long *bits)
  23 {
  24         dpaa_set_bits(BITS_MASK(idx), bits + BITS_IDX(idx));
  25 }
  26
  27 static inline void dpaa_clear_bits(unsigned long mask,
  28                                    volatile unsigned long *p)
  29 {
  30         *p &= ~mask;
  31 }
  32
  33 static inline void dpaa_clear_bit(int idx,
  34                                   volatile unsigned long *bits)
  35 {
  36         dpaa_clear_bits(BITS_MASK(idx), bits + BITS_IDX(idx));
  37 }
  38
  39 #endif /* __DPAA_BITS_H */