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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_SH_BITOPS_LLSC_H
   3 #define __ASM_SH_BITOPS_LLSC_H
   4
   5 static inline void set_bit(int nr, volatile void *addr)
   6 {
   7         int     mask;
   8         volatile unsigned int *a = addr;
   9         unsigned long tmp;
  10
  11         a += nr >> 5;
  12         mask = 1 << (nr & 0x1f);
  13
  14         __asm__ __volatile__ (
  15                 "1:                                             \n\t"
  16                 "movli.l        @%1, %0 ! set_bit               \n\t"
  17                 "or             %2, %0                          \n\t"
  18                 "movco.l        %0, @%1                         \n\t"
  19                 "bf             1b                              \n\t"
  20                 : "=&z" (tmp)
  21                 : "r" (a), "r" (mask)
  22                 : "t", "memory"
  23         );
  24 }
  25
  26 static inline void clear_bit(int nr, volatile void *addr)
  27 {
  28         int     mask;
  29         volatile unsigned int *a = addr;
  30         unsigned long tmp;
  31
  32         a += nr >> 5;
  33         mask = 1 << (nr & 0x1f);
  34
  35         __asm__ __volatile__ (
  36                 "1:                                             \n\t"
  37                 "movli.l        @%1, %0 ! clear_bit             \n\t"
  38                 "and            %2, %0                          \n\t"
  39                 "movco.l        %0, @%1                         \n\t"
  40                 "bf             1b                              \n\t"
  41                 : "=&z" (tmp)
  42                 : "r" (a), "r" (~mask)
  43                 : "t", "memory"
  44         );
  45 }
  46
  47 static inline void change_bit(int nr, volatile void *addr)
  48 {
  49         int     mask;
  50         volatile unsigned int *a = addr;
  51         unsigned long tmp;
  52
  53         a += nr >> 5;
  54         mask = 1 << (nr & 0x1f);
  55
  56         __asm__ __volatile__ (
  57                 "1:                                             \n\t"
  58                 "movli.l        @%1, %0 ! change_bit            \n\t"
  59                 "xor            %2, %0                          \n\t"
  60                 "movco.l        %0, @%1                         \n\t"
  61                 "bf             1b                              \n\t"
  62                 : "=&z" (tmp)
  63                 : "r" (a), "r" (mask)
  64                 : "t", "memory"
  65         );
  66 }
  67
  68 static inline int test_and_set_bit(int nr, volatile void *addr)
  69 {
  70         int     mask, retval;
  71         volatile unsigned int *a = addr;
  72         unsigned long tmp;
  73
  74         a += nr >> 5;
  75         mask = 1 << (nr & 0x1f);
  76
  77         __asm__ __volatile__ (
  78                 "1:                                             \n\t"
  79                 "movli.l        @%2, %0 ! test_and_set_bit      \n\t"
  80                 "mov            %0, %1                          \n\t"
  81                 "or             %3, %0                          \n\t"
  82                 "movco.l        %0, @%2                         \n\t"
  83                 "bf             1b                              \n\t"
  84                 "and            %3, %1                          \n\t"
  85                 : "=&z" (tmp), "=&r" (retval)
  86                 : "r" (a), "r" (mask)
  87                 : "t", "memory"
  88         );
  89
  90         return retval != 0;
  91 }
  92
  93 static inline int test_and_clear_bit(int nr, volatile void *addr)
  94 {
  95         int     mask, retval;
  96         volatile unsigned int *a = addr;
  97         unsigned long tmp;
  98
  99         a += nr >> 5;
 100         mask = 1 << (nr & 0x1f);
 101
 102         __asm__ __volatile__ (
 103                 "1:                                             \n\t"
 104                 "movli.l        @%2, %0 ! test_and_clear_bit    \n\t"
 105                 "mov            %0, %1                          \n\t"
 106                 "and            %4, %0                          \n\t"
 107                 "movco.l        %0, @%2                         \n\t"
 108                 "bf             1b                              \n\t"
 109                 "and            %3, %1                          \n\t"
 110                 "synco                                          \n\t"
 111                 : "=&z" (tmp), "=&r" (retval)
 112                 : "r" (a), "r" (mask), "r" (~mask)
 113                 : "t", "memory"
 114         );
 115
 116         return retval != 0;
 117 }
 118
 119 static inline int test_and_change_bit(int nr, volatile void *addr)
 120 {
 121         int     mask, retval;
 122         volatile unsigned int *a = addr;
 123         unsigned long tmp;
 124
 125         a += nr >> 5;
 126         mask = 1 << (nr & 0x1f);
 127
 128         __asm__ __volatile__ (
 129                 "1:                                             \n\t"
 130                 "movli.l        @%2, %0 ! test_and_change_bit   \n\t"
 131                 "mov            %0, %1                          \n\t"
 132                 "xor            %3, %0                          \n\t"
 133                 "movco.l        %0, @%2                         \n\t"
 134                 "bf             1b                              \n\t"
 135                 "and            %3, %1                          \n\t"
 136                 "synco                                          \n\t"
 137                 : "=&z" (tmp), "=&r" (retval)
 138                 : "r" (a), "r" (mask)
 139                 : "t", "memory"
 140         );
 141
 142         return retval != 0;
 143 }
 144
 145 #include <asm-generic/bitops/non-atomic.h>
 146
 147 #endif /* __ASM_SH_BITOPS_LLSC_H */