arch/arm64/include/asm/bitops.h

   1 /*
   2  * Copyright (C) 2012 ARM Ltd.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16 #ifndef __ASM_BITOPS_H
  17 #define __ASM_BITOPS_H
  18
  19 #include <linux/compiler.h>
  20
  21 #include <asm/barrier.h>
  22
  23 /*
  24  * clear_bit may not imply a memory barrier
  25  */
  26 #ifndef smp_mb__before_clear_bit
  27 #define smp_mb__before_clear_bit()      smp_mb()
  28 #define smp_mb__after_clear_bit()       smp_mb()
  29 #endif
  30
  31 #ifndef _LINUX_BITOPS_H
  32 #error only <linux/bitops.h> can be included directly
  33 #endif
  34
  35 /*
  36  * Little endian assembly atomic bitops.
  37  */
  38 extern void set_bit(int nr, volatile unsigned long *p);
  39 extern void clear_bit(int nr, volatile unsigned long *p);
  40 extern void change_bit(int nr, volatile unsigned long *p);
  41 extern int test_and_set_bit(int nr, volatile unsigned long *p);
  42 extern int test_and_clear_bit(int nr, volatile unsigned long *p);
  43 extern int test_and_change_bit(int nr, volatile unsigned long *p);
  44
  45 #include <asm-generic/bitops/builtin-__ffs.h>
  46 #include <asm-generic/bitops/builtin-ffs.h>
  47 #include <asm-generic/bitops/builtin-__fls.h>
  48 #include <asm-generic/bitops/builtin-fls.h>
  49
  50 #include <asm-generic/bitops/ffz.h>
  51 #include <asm-generic/bitops/fls64.h>
  52 #include <asm-generic/bitops/find.h>
  53
  54 #include <asm-generic/bitops/sched.h>
  55 #include <asm-generic/bitops/hweight.h>
  56 #include <asm-generic/bitops/lock.h>
  57
  58 #include <asm-generic/bitops/non-atomic.h>
  59 #include <asm-generic/bitops/le.h>
  60
  61 /*
  62  * Ext2 is defined to use little-endian byte ordering.
  63  */
  64 #define ext2_set_bit_atomic(lock, nr, p)        test_and_set_bit_le(nr, p)
  65 #define ext2_clear_bit_atomic(lock, nr, p)      test_and_clear_bit_le(nr, p)
  66
  67 #endif /* __ASM_BITOPS_H */