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