arch/sh/include/asm/bitops-llsc.h

   1 #ifndef __ASM_SH_BITOPS_LLSC_H
   2 #define __ASM_SH_BITOPS_LLSC_H
   3
   4 static inline void set_bit(int nr, volatile void *addr)
   5 {
   6         int     mask;
   7         volatile unsigned int *a = addr;
   8         unsigned long tmp;
   9
  10         a += nr >> 5;
  11         mask = 1 << (nr & 0x1f);
  12
  13         __asm__ __volatile__ (
  14                 "1:                                             \n\t"
  15                 "movli.l        @%1, %0 ! set_bit               \n\t"
  16                 "or             %2, %0                          \n\t"
  17                 "movco.l        %0, @%1                         \n\t"
  18                 "bf             1b                              \n\t"
  19                 : "=&z" (tmp)
  20                 : "r" (a), "r" (mask)
  21                 : "t", "memory"
  22         );
  23 }
  24
  25 static inline void clear_bit(int nr, volatile void *addr)
  26 {
  27         int     mask;
  28         volatile unsigned int *a = addr;
  29         unsigned long tmp;
  30
  31         a += nr >> 5;
  32         mask = 1 << (nr & 0x1f);
  33
  34         __asm__ __volatile__ (
  35                 "1:                                             \n\t"
  36                 "movli.l        @%1, %0 ! clear_bit             \n\t"
  37                 "and            %2, %0                          \n\t"
  38                 "movco.l        %0, @%1                         \n\t"
  39                 "bf             1b                              \n\t"
  40                 : "=&z" (tmp)
  41                 : "r" (a), "r" (~mask)
  42                 : "t", "memory"
  43         );
  44 }
  45
  46 static inline void change_bit(int nr, volatile void *addr)
  47 {
  48         int     mask;
  49         volatile unsigned int *a = addr;
  50         unsigned long tmp;
  51
  52         a += nr >> 5;
  53         mask = 1 << (nr & 0x1f);
  54
  55         __asm__ __volatile__ (
  56                 "1:                                             \n\t"
  57                 "movli.l        @%1, %0 ! change_bit            \n\t"
  58                 "xor            %2, %0                          \n\t"
  59                 "movco.l        %0, @%1                         \n\t"
  60                 "bf             1b                              \n\t"
  61                 : "=&z" (tmp)
  62                 : "r" (a), "r" (mask)
  63                 : "t", "memory"
  64         );
  65 }
  66
  67 static inline int test_and_set_bit(int nr, volatile void *addr)
  68 {
  69         int     mask, retval;
  70         volatile unsigned int *a = addr;
  71         unsigned long tmp;
  72
  73         a += nr >> 5;
  74         mask = 1 << (nr & 0x1f);
  75
  76         __asm__ __volatile__ (
  77                 "1:                                             \n\t"
  78                 "movli.l        @%2, %0 ! test_and_set_bit      \n\t"
  79                 "mov            %0, %1                          \n\t"
  80                 "or             %3, %0                          \n\t"
  81                 "movco.l        %0, @%2                         \n\t"
  82                 "bf             1b                              \n\t"
  83                 "and            %3, %1                          \n\t"
  84                 : "=&z" (tmp), "=&r" (retval)
  85                 : "r" (a), "r" (mask)
  86                 : "t", "memory"
  87         );
  88
  89         return retval != 0;
  90 }
  91
  92 static inline int test_and_clear_bit(int nr, volatile void *addr)
  93 {
  94         int     mask, retval;
  95         volatile unsigned int *a = addr;
  96         unsigned long tmp;
  97
  98         a += nr >> 5;
  99         mask = 1 << (nr & 0x1f);
 100
 101         __asm__ __volatile__ (
 102                 "1:                                             \n\t"
 103                 "movli.l        @%2, %0 ! test_and_clear_bit    \n\t"
 104                 "mov            %0, %1                          \n\t"
 105                 "and            %4, %0                          \n\t"
 106                 "movco.l        %0, @%2                         \n\t"
 107                 "bf             1b                              \n\t"
 108                 "and            %3, %1                          \n\t"
 109                 "synco                                          \n\t"
 110                 : "=&z" (tmp), "=&r" (retval)
 111                 : "r" (a), "r" (mask), "r" (~mask)
 112                 : "t", "memory"
 113         );
 114
 115         return retval != 0;
 116 }
 117
 118 static inline int test_and_change_bit(int nr, volatile void *addr)
 119 {
 120         int     mask, retval;
 121         volatile unsigned int *a = addr;
 122         unsigned long tmp;
 123
 124         a += nr >> 5;
 125         mask = 1 << (nr & 0x1f);
 126
 127         __asm__ __volatile__ (
 128                 "1:                                             \n\t"
 129                 "movli.l        @%2, %0 ! test_and_change_bit   \n\t"
 130                 "mov            %0, %1                          \n\t"
 131                 "xor            %3, %0                          \n\t"
 132                 "movco.l        %0, @%2                         \n\t"
 133                 "bf             1b                              \n\t"
 134                 "and            %3, %1                          \n\t"
 135                 "synco                                          \n\t"
 136                 : "=&z" (tmp), "=&r" (retval)
 137                 : "r" (a), "r" (mask)
 138                 : "t", "memory"
 139         );
 140
 141         return retval != 0;
 142 }
 143
 144 #include <asm-generic/bitops/non-atomic.h>
 145
 146 #endif /* __ASM_SH_BITOPS_LLSC_H */