release/src-rt-6.x/linux/linux-2.6/include/asm-sh64/bitops.h

   1 #ifndef __ASM_SH64_BITOPS_H
   2 #define __ASM_SH64_BITOPS_H
   3
   4 /*
   5  * This file is subject to the terms and conditions of the GNU General Public
   6  * License.  See the file "COPYING" in the main directory of this archive
   7  * for more details.
   8  *
   9  * include/asm-sh64/bitops.h
  10  *
  11  * Copyright (C) 2000, 2001  Paolo Alberelli
  12  * Copyright (C) 2003  Paul Mundt
  13  */
  14
  15 #ifdef __KERNEL__
  16 #include <linux/compiler.h>
  17 #include <asm/system.h>
  18 /* For __swab32 */
  19 #include <asm/byteorder.h>
  20
  21 static __inline__ void set_bit(int nr, volatile void * addr)
  22 {
  23         int     mask;
  24         volatile unsigned int *a = addr;
  25         unsigned long flags;
  26
  27         a += nr >> 5;
  28         mask = 1 << (nr & 0x1f);
  29         local_irq_save(flags);
  30         *a |= mask;
  31         local_irq_restore(flags);
  32 }
  33
  34 /*
  35  * clear_bit() doesn't provide any barrier for the compiler.
  36  */
  37 #define smp_mb__before_clear_bit()      barrier()
  38 #define smp_mb__after_clear_bit()       barrier()
  39 static inline void clear_bit(int nr, volatile unsigned long *a)
  40 {
  41         int     mask;
  42         unsigned long flags;
  43
  44         a += nr >> 5;
  45         mask = 1 << (nr & 0x1f);
  46         local_irq_save(flags);
  47         *a &= ~mask;
  48         local_irq_restore(flags);
  49 }
  50
  51 static __inline__ void change_bit(int nr, volatile void * addr)
  52 {
  53         int     mask;
  54         volatile unsigned int *a = addr;
  55         unsigned long flags;
  56
  57         a += nr >> 5;
  58         mask = 1 << (nr & 0x1f);
  59         local_irq_save(flags);
  60         *a ^= mask;
  61         local_irq_restore(flags);
  62 }
  63
  64 static __inline__ int test_and_set_bit(int nr, volatile void * addr)
  65 {
  66         int     mask, retval;
  67         volatile unsigned int *a = addr;
  68         unsigned long flags;
  69
  70         a += nr >> 5;
  71         mask = 1 << (nr & 0x1f);
  72         local_irq_save(flags);
  73         retval = (mask & *a) != 0;
  74         *a |= mask;
  75         local_irq_restore(flags);
  76
  77         return retval;
  78 }
  79
  80 static __inline__ int test_and_clear_bit(int nr, volatile void * addr)
  81 {
  82         int     mask, retval;
  83         volatile unsigned int *a = addr;
  84         unsigned long flags;
  85
  86         a += nr >> 5;
  87         mask = 1 << (nr & 0x1f);
  88         local_irq_save(flags);
  89         retval = (mask & *a) != 0;
  90         *a &= ~mask;
  91         local_irq_restore(flags);
  92
  93         return retval;
  94 }
  95
  96 static __inline__ int test_and_change_bit(int nr, volatile void * addr)
  97 {
  98         int     mask, retval;
  99         volatile unsigned int *a = addr;
 100         unsigned long flags;
 101
 102         a += nr >> 5;
 103         mask = 1 << (nr & 0x1f);
 104         local_irq_save(flags);
 105         retval = (mask & *a) != 0;
 106         *a ^= mask;
 107         local_irq_restore(flags);
 108
 109         return retval;
 110 }
 111
 112 #include <asm-generic/bitops/non-atomic.h>
 113
 114 static __inline__ unsigned long ffz(unsigned long word)
 115 {
 116         unsigned long result, __d2, __d3;
 117
 118         __asm__("gettr  tr0, %2\n\t"
 119                 "pta    $+32, tr0\n\t"
 120                 "andi   %1, 1, %3\n\t"
 121                 "beq    %3, r63, tr0\n\t"
 122                 "pta    $+4, tr0\n"
 123                 "0:\n\t"
 124                 "shlri.l        %1, 1, %1\n\t"
 125                 "addi   %0, 1, %0\n\t"
 126                 "andi   %1, 1, %3\n\t"
 127                 "beqi   %3, 1, tr0\n"
 128                 "1:\n\t"
 129                 "ptabs  %2, tr0\n\t"
 130                 : "=r" (result), "=r" (word), "=r" (__d2), "=r" (__d3)
 131                 : "0" (0L), "1" (word));
 132
 133         return result;
 134 }
 135
 136 #include <asm-generic/bitops/__ffs.h>
 137 #include <asm-generic/bitops/find.h>
 138 #include <asm-generic/bitops/hweight.h>
 139 #include <asm-generic/bitops/sched.h>
 140 #include <asm-generic/bitops/ffs.h>
 141 #include <asm-generic/bitops/ext2-non-atomic.h>
 142 #include <asm-generic/bitops/ext2-atomic.h>
 143 #include <asm-generic/bitops/minix.h>
 144 #include <asm-generic/bitops/fls.h>
 145 #include <asm-generic/bitops/fls64.h>
 146
 147 #endif /* __KERNEL__ */
 148
 149 #endif /* __ASM_SH64_BITOPS_H */