release/src-rt-6.x/linux/linux-2.6/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 extern unsigned long ___set_bit(unsigned long *addr, unsigned long mask);
  18 extern unsigned long ___clear_bit(unsigned long *addr, unsigned long mask);
  19 extern unsigned long ___change_bit(unsigned long *addr, unsigned long mask);
  20
  21 /*
  22  * Set bit 'nr' in 32-bit quantity at address 'addr' where bit '0'
  23  * is in the highest of the four bytes and bit '31' is the high bit
  24  * within the first byte. Sparc is BIG-Endian. Unless noted otherwise
  25  * all bit-ops return 0 if bit was previously clear and != 0 otherwise.
  26  */
  27 static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *addr)
  28 {
  29         unsigned long *ADDR, mask;
  30
  31         ADDR = ((unsigned long *) addr) + (nr >> 5);
  32         mask = 1 << (nr & 31);
  33
  34         return ___set_bit(ADDR, mask) != 0;
  35 }
  36
  37 static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
  38 {
  39         unsigned long *ADDR, mask;
  40
  41         ADDR = ((unsigned long *) addr) + (nr >> 5);
  42         mask = 1 << (nr & 31);
  43
  44         (void) ___set_bit(ADDR, mask);
  45 }
  46
  47 static inline int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr)
  48 {
  49         unsigned long *ADDR, mask;
  50
  51         ADDR = ((unsigned long *) addr) + (nr >> 5);
  52         mask = 1 << (nr & 31);
  53
  54         return ___clear_bit(ADDR, mask) != 0;
  55 }
  56
  57 static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
  58 {
  59         unsigned long *ADDR, mask;
  60
  61         ADDR = ((unsigned long *) addr) + (nr >> 5);
  62         mask = 1 << (nr & 31);
  63
  64         (void) ___clear_bit(ADDR, mask);
  65 }
  66
  67 static inline int test_and_change_bit(unsigned long nr, volatile unsigned long *addr)
  68 {
  69         unsigned long *ADDR, mask;
  70
  71         ADDR = ((unsigned long *) addr) + (nr >> 5);
  72         mask = 1 << (nr & 31);
  73
  74         return ___change_bit(ADDR, mask) != 0;
  75 }
  76
  77 static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
  78 {
  79         unsigned long *ADDR, mask;
  80
  81         ADDR = ((unsigned long *) addr) + (nr >> 5);
  82         mask = 1 << (nr & 31);
  83
  84         (void) ___change_bit(ADDR, mask);
  85 }
  86
  87 #include <asm-generic/bitops/non-atomic.h>
  88
  89 #define smp_mb__before_clear_bit()      do { } while(0)
  90 #define smp_mb__after_clear_bit()       do { } while(0)
  91
  92 #include <asm-generic/bitops/ffz.h>
  93 #include <asm-generic/bitops/__ffs.h>
  94 #include <asm-generic/bitops/sched.h>
  95 #include <asm-generic/bitops/ffs.h>
  96 #include <asm-generic/bitops/fls.h>
  97 #include <asm-generic/bitops/fls64.h>
  98 #include <asm-generic/bitops/hweight.h>
  99 #include <asm-generic/bitops/find.h>
 100 #include <asm-generic/bitops/ext2-non-atomic.h>
 101 #include <asm-generic/bitops/ext2-atomic.h>
 102 #include <asm-generic/bitops/minix.h>
 103
 104 #endif /* __KERNEL__ */
 105
 106 #endif /* defined(_SPARC_BITOPS_H) */