include/asm-h8300/bitops.h

   1 #ifndef _H8300_BITOPS_H
   2 #define _H8300_BITOPS_H
   3
   4 /*
   5  * Copyright 1992, Linus Torvalds.
   6  * Copyright 2002, Yoshinori Sato
   7  */
   8
   9 #include <linux/compiler.h>
  10 #include <asm/system.h>
  11
  12 #ifdef __KERNEL__
  13 /*
  14  * Function prototypes to keep gcc -Wall happy
  15  */
  16
  17 /*
  18  * ffz = Find First Zero in word. Undefined if no zero exists,
  19  * so code should check against ~0UL first..
  20  */
  21 static __inline__ unsigned long ffz(unsigned long word)
  22 {
  23         unsigned long result;
  24
  25         result = -1;
  26         __asm__("1:\n\t"
  27                 "shlr.l %2\n\t"
  28                 "adds #1,%0\n\t"
  29                 "bcs 1b"
  30                 : "=r" (result)
  31                 : "0"  (result),"r" (word));
  32         return result;
  33 }
  34
  35 #define H8300_GEN_BITOP_CONST(OP,BIT)                       \
  36         case BIT:                                           \
  37         __asm__(OP " #" #BIT ",@%0"::"r"(b_addr):"memory"); \
  38         break;
  39
  40 #define H8300_GEN_BITOP(FNAME,OP)                                     \
  41 static __inline__ void FNAME(int nr, volatile unsigned long* addr)    \
  42 {                                                                     \
  43         volatile unsigned char *b_addr;                               \
  44         b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3);    \
  45         if (__builtin_constant_p(nr)) {                               \
  46                 switch(nr & 7) {                                      \
  47                         H8300_GEN_BITOP_CONST(OP,0)                   \
  48                         H8300_GEN_BITOP_CONST(OP,1)                   \
  49                         H8300_GEN_BITOP_CONST(OP,2)                   \
  50                         H8300_GEN_BITOP_CONST(OP,3)                   \
  51                         H8300_GEN_BITOP_CONST(OP,4)                   \
  52                         H8300_GEN_BITOP_CONST(OP,5)                   \
  53                         H8300_GEN_BITOP_CONST(OP,6)                   \
  54                         H8300_GEN_BITOP_CONST(OP,7)                   \
  55                 }                                                     \
  56         } else {                                                      \
  57                 __asm__(OP " %w0,@%1"::"r"(nr),"r"(b_addr):"memory"); \
  58         }                                                             \
  59 }
  60
  61 /*
  62  * clear_bit() doesn't provide any barrier for the compiler.
  63  */
  64 #define smp_mb__before_clear_bit()      barrier()
  65 #define smp_mb__after_clear_bit()       barrier()
  66
  67 H8300_GEN_BITOP(set_bit   ,"bset")
  68 H8300_GEN_BITOP(clear_bit ,"bclr")
  69 H8300_GEN_BITOP(change_bit,"bnot")
  70 #define __set_bit(nr,addr)    set_bit((nr),(addr))
  71 #define __clear_bit(nr,addr)  clear_bit((nr),(addr))
  72 #define __change_bit(nr,addr) change_bit((nr),(addr))
  73
  74 #undef H8300_GEN_BITOP
  75 #undef H8300_GEN_BITOP_CONST
  76
  77 static __inline__ int test_bit(int nr, const unsigned long* addr)
  78 {
  79         return (*((volatile unsigned char *)addr +
  80                ((nr >> 3) ^ 3)) & (1UL << (nr & 7))) != 0;
  81 }
  82
  83 #define __test_bit(nr, addr) test_bit(nr, addr)
  84
  85 #define H8300_GEN_TEST_BITOP_CONST_INT(OP,BIT)                       \
  86         case BIT:                                                    \
  87         __asm__("stc ccr,%w1\n\t"                                    \
  88                 "orc #0x80,ccr\n\t"                                  \
  89                 "bld #" #BIT ",@%4\n\t"                              \
  90                 OP " #" #BIT ",@%4\n\t"                              \
  91                 "rotxl.l %0\n\t"                                     \
  92                 "ldc %w1,ccr"                                        \
  93                 : "=r"(retval),"=&r"(ccrsave),"=m"(*b_addr)          \
  94                 : "0" (retval),"r" (b_addr)                          \
  95                 : "memory");                                         \
  96         break;
  97
  98 #define H8300_GEN_TEST_BITOP_CONST(OP,BIT)                           \
  99         case BIT:                                                    \
 100         __asm__("bld #" #BIT ",@%3\n\t"                              \
 101                 OP " #" #BIT ",@%3\n\t"                              \
 102                 "rotxl.l %0\n\t"                                     \
 103                 : "=r"(retval),"=m"(*b_addr)                         \
 104                 : "0" (retval),"r" (b_addr)                          \
 105                 : "memory");                                         \
 106         break;
 107
 108 #define H8300_GEN_TEST_BITOP(FNNAME,OP)                              \
 109 static __inline__ int FNNAME(int nr, volatile void * addr)           \
 110 {                                                                    \
 111         int retval = 0;                                              \
 112         char ccrsave;                                                \
 113         volatile unsigned char *b_addr;                              \
 114         b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3);   \
 115         if (__builtin_constant_p(nr)) {                              \
 116                 switch(nr & 7) {                                     \
 117                         H8300_GEN_TEST_BITOP_CONST_INT(OP,0)         \
 118                         H8300_GEN_TEST_BITOP_CONST_INT(OP,1)         \
 119                         H8300_GEN_TEST_BITOP_CONST_INT(OP,2)         \
 120                         H8300_GEN_TEST_BITOP_CONST_INT(OP,3)         \
 121                         H8300_GEN_TEST_BITOP_CONST_INT(OP,4)         \
 122                         H8300_GEN_TEST_BITOP_CONST_INT(OP,5)         \
 123                         H8300_GEN_TEST_BITOP_CONST_INT(OP,6)         \
 124                         H8300_GEN_TEST_BITOP_CONST_INT(OP,7)         \
 125                 }                                                    \
 126         } else {                                                     \
 127                 __asm__("stc ccr,%w1\n\t"                            \
 128                         "orc #0x80,ccr\n\t"                          \
 129                         "btst %w5,@%4\n\t"                           \
 130                         OP " %w5,@%4\n\t"                            \
 131                         "beq 1f\n\t"                                 \
 132                         "inc.l #1,%0\n"                              \
 133                         "1:\n\t"                                     \
 134                         "ldc %w1,ccr"                                \
 135                         : "=r"(retval),"=&r"(ccrsave),"=m"(*b_addr)  \
 136                         : "0" (retval),"r" (b_addr),"r"(nr)          \
 137                         : "memory");                                 \
 138         }                                                            \
 139         return retval;                                               \
 140 }                                                                    \
 141                                                                      \
 142 static __inline__ int __ ## FNNAME(int nr, volatile void * addr)     \
 143 {                                                                    \
 144         int retval = 0;                                              \
 145         volatile unsigned char *b_addr;                              \
 146         b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3);   \
 147         if (__builtin_constant_p(nr)) {                              \
 148                 switch(nr & 7) {                                     \
 149                         H8300_GEN_TEST_BITOP_CONST(OP,0)             \
 150                         H8300_GEN_TEST_BITOP_CONST(OP,1)             \
 151                         H8300_GEN_TEST_BITOP_CONST(OP,2)             \
 152                         H8300_GEN_TEST_BITOP_CONST(OP,3)             \
 153                         H8300_GEN_TEST_BITOP_CONST(OP,4)             \
 154                         H8300_GEN_TEST_BITOP_CONST(OP,5)             \
 155                         H8300_GEN_TEST_BITOP_CONST(OP,6)             \
 156                         H8300_GEN_TEST_BITOP_CONST(OP,7)             \
 157                 }                                                    \
 158         } else {                                                     \
 159                 __asm__("btst %w4,@%3\n\t"                           \
 160                         OP " %w4,@%3\n\t"                            \
 161                         "beq 1f\n\t"                                 \
 162                         "inc.l #1,%0\n"                              \
 163                         "1:"                                         \
 164                         : "=r"(retval),"=m"(*b_addr)                 \
 165                         : "0" (retval),"r" (b_addr),"r"(nr)          \
 166                         : "memory");                                 \
 167         }                                                            \
 168         return retval;                                               \
 169 }
 170
 171 H8300_GEN_TEST_BITOP(test_and_set_bit,   "bset")
 172 H8300_GEN_TEST_BITOP(test_and_clear_bit, "bclr")
 173 H8300_GEN_TEST_BITOP(test_and_change_bit,"bnot")
 174 #undef H8300_GEN_TEST_BITOP_CONST
 175 #undef H8300_GEN_TEST_BITOP_CONST_INT
 176 #undef H8300_GEN_TEST_BITOP
 177
 178 #include <asm-generic/bitops/ffs.h>
 179
 180 static __inline__ unsigned long __ffs(unsigned long word)
 181 {
 182         unsigned long result;
 183
 184         result = -1;
 185         __asm__("1:\n\t"
 186                 "shlr.l %2\n\t"
 187                 "adds #1,%0\n\t"
 188                 "bcc 1b"
 189                 : "=r" (result)
 190                 : "0"(result),"r"(word));
 191         return result;
 192 }
 193
 194 #include <asm-generic/bitops/find.h>
 195 #include <asm-generic/bitops/sched.h>
 196 #include <asm-generic/bitops/hweight.h>
 197 #include <asm-generic/bitops/ext2-non-atomic.h>
 198 #include <asm-generic/bitops/ext2-atomic.h>
 199 #include <asm-generic/bitops/minix.h>
 200
 201 #endif /* __KERNEL__ */
 202
 203 #include <asm-generic/bitops/fls.h>
 204 #include <asm-generic/bitops/fls64.h>
 205
 206 #endif /* _H8300_BITOPS_H */