arch/h8300/include/asm/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 #ifndef _LINUX_BITOPS_H
  15 #error only <linux/bitops.h> can be included directly
  16 #endif
  17
  18 /*
  19  * Function prototypes to keep gcc -Wall happy
  20  */
  21
  22 /*
  23  * ffz = Find First Zero in word. Undefined if no zero exists,
  24  * so code should check against ~0UL first..
  25  */
  26 static __inline__ unsigned long ffz(unsigned long word)
  27 {
  28         unsigned long result;
  29
  30         result = -1;
  31         __asm__("1:\n\t"
  32                 "shlr.l %2\n\t"
  33                 "adds #1,%0\n\t"
  34                 "bcs 1b"
  35                 : "=r" (result)
  36                 : "0"  (result),"r" (word));
  37         return result;
  38 }
  39
  40 #define H8300_GEN_BITOP_CONST(OP,BIT)                       \
  41         case BIT:                                           \
  42         __asm__(OP " #" #BIT ",@%0"::"r"(b_addr):"memory"); \
  43         break;
  44
  45 #define H8300_GEN_BITOP(FNAME,OP)                                     \
  46 static __inline__ void FNAME(int nr, volatile unsigned long* addr)    \
  47 {                                                                     \
  48         volatile unsigned char *b_addr;                               \
  49         b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3);    \
  50         if (__builtin_constant_p(nr)) {                               \
  51                 switch(nr & 7) {                                      \
  52                         H8300_GEN_BITOP_CONST(OP,0)                   \
  53                         H8300_GEN_BITOP_CONST(OP,1)                   \
  54                         H8300_GEN_BITOP_CONST(OP,2)                   \
  55                         H8300_GEN_BITOP_CONST(OP,3)                   \
  56                         H8300_GEN_BITOP_CONST(OP,4)                   \
  57                         H8300_GEN_BITOP_CONST(OP,5)                   \
  58                         H8300_GEN_BITOP_CONST(OP,6)                   \
  59                         H8300_GEN_BITOP_CONST(OP,7)                   \
  60                 }                                                     \
  61         } else {                                                      \
  62                 __asm__(OP " %w0,@%1"::"r"(nr),"r"(b_addr):"memory"); \
  63         }                                                             \
  64 }
  65
  66 /*
  67  * clear_bit() doesn't provide any barrier for the compiler.
  68  */
  69 #define smp_mb__before_clear_bit()      barrier()
  70 #define smp_mb__after_clear_bit()       barrier()
  71
  72 H8300_GEN_BITOP(set_bit   ,"bset")
  73 H8300_GEN_BITOP(clear_bit ,"bclr")
  74 H8300_GEN_BITOP(change_bit,"bnot")
  75 #define __set_bit(nr,addr)    set_bit((nr),(addr))
  76 #define __clear_bit(nr,addr)  clear_bit((nr),(addr))
  77 #define __change_bit(nr,addr) change_bit((nr),(addr))
  78
  79 #undef H8300_GEN_BITOP
  80 #undef H8300_GEN_BITOP_CONST
  81
  82 static __inline__ int test_bit(int nr, const unsigned long* addr)
  83 {
  84         return (*((volatile unsigned char *)addr +
  85                ((nr >> 3) ^ 3)) & (1UL << (nr & 7))) != 0;
  86 }
  87
  88 #define __test_bit(nr, addr) test_bit(nr, addr)
  89
  90 #define H8300_GEN_TEST_BITOP_CONST_INT(OP,BIT)                       \
  91         case BIT:                                                    \
  92         __asm__("stc ccr,%w1\n\t"                                    \
  93                 "orc #0x80,ccr\n\t"                                  \
  94                 "bld #" #BIT ",@%4\n\t"                              \
  95                 OP " #" #BIT ",@%4\n\t"                              \
  96                 "rotxl.l %0\n\t"                                     \
  97                 "ldc %w1,ccr"                                        \
  98                 : "=r"(retval),"=&r"(ccrsave),"=m"(*b_addr)          \
  99                 : "0" (retval),"r" (b_addr)                          \
 100                 : "memory");                                         \
 101         break;
 102
 103 #define H8300_GEN_TEST_BITOP_CONST(OP,BIT)                           \
 104         case BIT:                                                    \
 105         __asm__("bld #" #BIT ",@%3\n\t"                              \
 106                 OP " #" #BIT ",@%3\n\t"                              \
 107                 "rotxl.l %0\n\t"                                     \
 108                 : "=r"(retval),"=m"(*b_addr)                         \
 109                 : "0" (retval),"r" (b_addr)                          \
 110                 : "memory");                                         \
 111         break;
 112
 113 #define H8300_GEN_TEST_BITOP(FNNAME,OP)                              \
 114 static __inline__ int FNNAME(int nr, volatile void * addr)           \
 115 {                                                                    \
 116         int retval = 0;                                              \
 117         char ccrsave;                                                \
 118         volatile unsigned char *b_addr;                              \
 119         b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3);   \
 120         if (__builtin_constant_p(nr)) {                              \
 121                 switch(nr & 7) {                                     \
 122                         H8300_GEN_TEST_BITOP_CONST_INT(OP,0)         \
 123                         H8300_GEN_TEST_BITOP_CONST_INT(OP,1)         \
 124                         H8300_GEN_TEST_BITOP_CONST_INT(OP,2)         \
 125                         H8300_GEN_TEST_BITOP_CONST_INT(OP,3)         \
 126                         H8300_GEN_TEST_BITOP_CONST_INT(OP,4)         \
 127                         H8300_GEN_TEST_BITOP_CONST_INT(OP,5)         \
 128                         H8300_GEN_TEST_BITOP_CONST_INT(OP,6)         \
 129                         H8300_GEN_TEST_BITOP_CONST_INT(OP,7)         \
 130                 }                                                    \
 131         } else {                                                     \
 132                 __asm__("stc ccr,%w1\n\t"                            \
 133                         "orc #0x80,ccr\n\t"                          \
 134                         "btst %w5,@%4\n\t"                           \
 135                         OP " %w5,@%4\n\t"                            \
 136                         "beq 1f\n\t"                                 \
 137                         "inc.l #1,%0\n"                              \
 138                         "1:\n\t"                                     \
 139                         "ldc %w1,ccr"                                \
 140                         : "=r"(retval),"=&r"(ccrsave),"=m"(*b_addr)  \
 141                         : "0" (retval),"r" (b_addr),"r"(nr)          \
 142                         : "memory");                                 \
 143         }                                                            \
 144         return retval;                                               \
 145 }                                                                    \
 146                                                                      \
 147 static __inline__ int __ ## FNNAME(int nr, volatile void * addr)     \
 148 {                                                                    \
 149         int retval = 0;                                              \
 150         volatile unsigned char *b_addr;                              \
 151         b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3);   \
 152         if (__builtin_constant_p(nr)) {                              \
 153                 switch(nr & 7) {                                     \
 154                         H8300_GEN_TEST_BITOP_CONST(OP,0)             \
 155                         H8300_GEN_TEST_BITOP_CONST(OP,1)             \
 156                         H8300_GEN_TEST_BITOP_CONST(OP,2)             \
 157                         H8300_GEN_TEST_BITOP_CONST(OP,3)             \
 158                         H8300_GEN_TEST_BITOP_CONST(OP,4)             \
 159                         H8300_GEN_TEST_BITOP_CONST(OP,5)             \
 160                         H8300_GEN_TEST_BITOP_CONST(OP,6)             \
 161                         H8300_GEN_TEST_BITOP_CONST(OP,7)             \
 162                 }                                                    \
 163         } else {                                                     \
 164                 __asm__("btst %w4,@%3\n\t"                           \
 165                         OP " %w4,@%3\n\t"                            \
 166                         "beq 1f\n\t"                                 \
 167                         "inc.l #1,%0\n"                              \
 168                         "1:"                                         \
 169                         : "=r"(retval),"=m"(*b_addr)                 \
 170                         : "0" (retval),"r" (b_addr),"r"(nr)          \
 171                         : "memory");                                 \
 172         }                                                            \
 173         return retval;                                               \
 174 }
 175
 176 H8300_GEN_TEST_BITOP(test_and_set_bit,   "bset")
 177 H8300_GEN_TEST_BITOP(test_and_clear_bit, "bclr")
 178 H8300_GEN_TEST_BITOP(test_and_change_bit,"bnot")
 179 #undef H8300_GEN_TEST_BITOP_CONST
 180 #undef H8300_GEN_TEST_BITOP_CONST_INT
 181 #undef H8300_GEN_TEST_BITOP
 182
 183 #include <asm-generic/bitops/ffs.h>
 184
 185 static __inline__ unsigned long __ffs(unsigned long word)
 186 {
 187         unsigned long result;
 188
 189         result = -1;
 190         __asm__("1:\n\t"
 191                 "shlr.l %2\n\t"
 192                 "adds #1,%0\n\t"
 193                 "bcc 1b"
 194                 : "=r" (result)
 195                 : "0"(result),"r"(word));
 196         return result;
 197 }
 198
 199 #include <asm-generic/bitops/find.h>
 200 #include <asm-generic/bitops/sched.h>
 201 #include <asm-generic/bitops/hweight.h>
 202 #include <asm-generic/bitops/lock.h>
 203 #include <asm-generic/bitops/le.h>
 204 #include <asm-generic/bitops/ext2-atomic.h>
 205
 206 #endif /* __KERNEL__ */
 207
 208 #include <asm-generic/bitops/fls.h>
 209 #include <asm-generic/bitops/__fls.h>
 210 #include <asm-generic/bitops/fls64.h>
 211
 212 #endif /* _H8300_BITOPS_H */