LXR linux/arch/sparc/include/asm/bitops

   1/*
   2 * bitops.h: Bit string operations on the Sparc.
   3 *
   4 * Copyright 1995 David S. Miller (davem@caip.rutgers.edu)
   5 * Copyright 1996 Eddie C. Dost   (ecd@skynet.be)
   6 * Copyright 2001 Anton Blanchard (anton@samba.org)
   7 */
   8
   9#ifndef _SPARC_BITOPS_H
  10#define _SPARC_BITOPS_H
  11
  12#include <linux/compiler.h>
  13#include <asm/byteorder.h>
  14
  15#ifdef __KERNEL__
  16
  17#ifndef _LINUX_BITOPS_H
  18#error only <linux/bitops.h> can be included directly
  19#endif
  20
  21extern unsigned long ___set_bit(unsigned long *addr, unsigned long mask);
  22extern unsigned long ___clear_bit(unsigned long *addr, unsigned long mask);
  23extern unsigned long ___change_bit(unsigned long *addr, unsigned long mask);
  24
  25/*
  26 * Set bit 'nr' in 32-bit quantity at address 'addr' where bit '0'
  27 * is in the highest of the four bytes and bit '31' is the high bit
  28 * within the first byte. Sparc is BIG-Endian. Unless noted otherwise
  29 * all bit-ops return 0 if bit was previously clear and != 0 otherwise.
  30 */
  31static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *addr)
  32{
  33        unsigned long *ADDR, mask;
  34
  35        ADDR = ((unsigned long *) addr) + (nr >> 5);
  36        mask = 1 << (nr & 31);
  37
  38        return ___set_bit(ADDR, mask) != 0;
  39}
  40
  41static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
  42{
  43        unsigned long *ADDR, mask;
  44
  45        ADDR = ((unsigned long *) addr) + (nr >> 5);
  46        mask = 1 << (nr & 31);
  47
  48        (void) ___set_bit(ADDR, mask);
  49}
  50
  51static inline int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr)
  52{
  53        unsigned long *ADDR, mask;
  54
  55        ADDR = ((unsigned long *) addr) + (nr >> 5);
  56        mask = 1 << (nr & 31);
  57
  58        return ___clear_bit(ADDR, mask) != 0;
  59}
  60
  61static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
  62{
  63        unsigned long *ADDR, mask;
  64
  65        ADDR = ((unsigned long *) addr) + (nr >> 5);
  66        mask = 1 << (nr & 31);
  67
  68        (void) ___clear_bit(ADDR, mask);
  69}
  70
  71static inline int test_and_change_bit(unsigned long nr, volatile unsigned long *addr)
  72{
  73        unsigned long *ADDR, mask;
  74
  75        ADDR = ((unsigned long *) addr) + (nr >> 5);
  76        mask = 1 << (nr & 31);
  77
  78        return ___change_bit(ADDR, mask) != 0;
  79}
  80
  81static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
  82{
  83        unsigned long *ADDR, mask;
  84
  85        ADDR = ((unsigned long *) addr) + (nr >> 5);
  86        mask = 1 << (nr & 31);
  87
  88        (void) ___change_bit(ADDR, mask);
  89}
  90
  91#include <asm-generic/bitops/non-atomic.h>
  92
  93#define smp_mb__before_clear_bit()      do { } while(0)
  94#define smp_mb__after_clear_bit()       do { } while(0)
  95
  96#include <asm-generic/bitops/ffz.h>
  97#include <asm-generic/bitops/__ffs.h>
  98#include <asm-generic/bitops/sched.h>
  99#include <asm-generic/bitops/ffs.h>
 100#include <asm-generic/bitops/fls.h>
 101#include <asm-generic/bitops/__fls.h>
 102#include <asm-generic/bitops/fls64.h>
 103#include <asm-generic/bitops/hweight.h>
 104#include <asm-generic/bitops/lock.h>
 105#include <asm-generic/bitops/find.h>
 106#include <asm-generic/bitops/le.h>
 107#include <asm-generic/bitops/ext2-atomic.h>
 108
 109#endif /* __KERNEL__ */
 110
 111#endif /* defined(_SPARC_BITOPS_H) */
 112