arch/blackfin/include/asm/bitops.h

   1 /*
   2  * Copyright 2004-2009 Analog Devices Inc.
   3  *
   4  * Licensed under the GPL-2 or later.
   5  */
   6
   7 #ifndef _BLACKFIN_BITOPS_H
   8 #define _BLACKFIN_BITOPS_H
   9
  10 #include <linux/compiler.h>
  11
  12 #include <asm-generic/bitops/__ffs.h>
  13 #include <asm-generic/bitops/ffz.h>
  14 #include <asm-generic/bitops/fls.h>
  15 #include <asm-generic/bitops/__fls.h>
  16 #include <asm-generic/bitops/fls64.h>
  17 #include <asm-generic/bitops/find.h>
  18
  19 #ifndef _LINUX_BITOPS_H
  20 #error only <linux/bitops.h> can be included directly
  21 #endif
  22
  23 #include <asm-generic/bitops/sched.h>
  24 #include <asm-generic/bitops/ffs.h>
  25 #include <asm-generic/bitops/const_hweight.h>
  26 #include <asm-generic/bitops/lock.h>
  27
  28 #include <asm-generic/bitops/ext2-atomic.h>
  29
  30 #include <asm/barrier.h>
  31
  32 #ifndef CONFIG_SMP
  33 #include <linux/irqflags.h>
  34 /*
  35  * clear_bit may not imply a memory barrier
  36  */
  37 #include <asm-generic/bitops/atomic.h>
  38 #include <asm-generic/bitops/non-atomic.h>
  39 #else
  40
  41 #include <asm/byteorder.h>      /* swab32 */
  42 #include <linux/linkage.h>
  43
  44 asmlinkage int __raw_bit_set_asm(volatile unsigned long *addr, int nr);
  45
  46 asmlinkage int __raw_bit_clear_asm(volatile unsigned long *addr, int nr);
  47
  48 asmlinkage int __raw_bit_toggle_asm(volatile unsigned long *addr, int nr);
  49
  50 asmlinkage int __raw_bit_test_set_asm(volatile unsigned long *addr, int nr);
  51
  52 asmlinkage int __raw_bit_test_clear_asm(volatile unsigned long *addr, int nr);
  53
  54 asmlinkage int __raw_bit_test_toggle_asm(volatile unsigned long *addr, int nr);
  55
  56 asmlinkage int __raw_bit_test_asm(const volatile unsigned long *addr, int nr);
  57
  58 static inline void set_bit(int nr, volatile unsigned long *addr)
  59 {
  60         volatile unsigned long *a = addr + (nr >> 5);
  61         __raw_bit_set_asm(a, nr & 0x1f);
  62 }
  63
  64 static inline void clear_bit(int nr, volatile unsigned long *addr)
  65 {
  66         volatile unsigned long *a = addr + (nr >> 5);
  67         __raw_bit_clear_asm(a, nr & 0x1f);
  68 }
  69
  70 static inline void change_bit(int nr, volatile unsigned long *addr)
  71 {
  72         volatile unsigned long *a = addr + (nr >> 5);
  73         __raw_bit_toggle_asm(a, nr & 0x1f);
  74 }
  75
  76 static inline int test_bit(int nr, const volatile unsigned long *addr)
  77 {
  78         volatile const unsigned long *a = addr + (nr >> 5);
  79         return __raw_bit_test_asm(a, nr & 0x1f) != 0;
  80 }
  81
  82 static inline int test_and_set_bit(int nr, volatile unsigned long *addr)
  83 {
  84         volatile unsigned long *a = addr + (nr >> 5);
  85         return __raw_bit_test_set_asm(a, nr & 0x1f);
  86 }
  87
  88 static inline int test_and_clear_bit(int nr, volatile unsigned long *addr)
  89 {
  90         volatile unsigned long *a = addr + (nr >> 5);
  91         return __raw_bit_test_clear_asm(a, nr & 0x1f);
  92 }
  93
  94 static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
  95 {
  96         volatile unsigned long *a = addr + (nr >> 5);
  97         return __raw_bit_test_toggle_asm(a, nr & 0x1f);
  98 }
  99
 100 #define test_bit __skip_test_bit
 101 #include <asm-generic/bitops/non-atomic.h>
 102 #undef test_bit
 103
 104 #endif /* CONFIG_SMP */
 105
 106 /* Needs to be after test_bit and friends */
 107 #include <asm-generic/bitops/le.h>
 108
 109 /*
 110  * hweightN: returns the hamming weight (i.e. the number
 111  * of bits set) of a N-bit word
 112  */
 113
 114 static inline unsigned int __arch_hweight32(unsigned int w)
 115 {
 116         unsigned int res;
 117
 118         __asm__ ("%0.l = ONES %1;"
 119                 "%0 = %0.l (Z);"
 120                 : "=d" (res) : "d" (w));
 121         return res;
 122 }
 123
 124 static inline unsigned int __arch_hweight64(__u64 w)
 125 {
 126         return __arch_hweight32((unsigned int)(w >> 32)) +
 127                __arch_hweight32((unsigned int)w);
 128 }
 129
 130 static inline unsigned int __arch_hweight16(unsigned int w)
 131 {
 132         return __arch_hweight32(w & 0xffff);
 133 }
 134
 135 static inline unsigned int __arch_hweight8(unsigned int w)
 136 {
 137         return __arch_hweight32(w & 0xff);
 138 }
 139
 140 #endif                          /* _BLACKFIN_BITOPS_H */