include/asm-sparc/bitops.h

   1 /* $Id: bitops.h,v 1.67 2001/11/19 18:36:34 davem Exp $
   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
  21 extern unsigned long ___set_bit(unsigned long *addr, unsigned long mask);
  22 extern unsigned long ___clear_bit(unsigned long *addr, unsigned long mask);
  23 extern 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  */
  31 static 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
  41 static 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
  51 static 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
  61 static 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
  71 static 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
  81 static 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/fls64.h>
 102 #include <asm-generic/bitops/hweight.h>
 103 #include <asm-generic/bitops/lock.h>
 104 #include <asm-generic/bitops/find.h>
 105 #include <asm-generic/bitops/ext2-non-atomic.h>
 106 #include <asm-generic/bitops/ext2-atomic.h>
 107 #include <asm-generic/bitops/minix.h>
 108
 109 #endif /* __KERNEL__ */
 110
 111 #endif /* defined(_SPARC_BITOPS_H) */