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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _H8300_BITOPS_H #define _H8300_BITOPS_H /* * Copyright 1992, Linus Torvalds. * Copyright 2002, Yoshinori Sato */ #include <linux/compiler.h> #ifdef __KERNEL__ #ifndef _LINUX_BITOPS_H #error only <linux/bitops.h> can be included directly #endif /* * Function prototypes to keep gcc -Wall happy */ /* * ffz = Find First Zero in word. Undefined if no zero exists, * so code should check against ~0UL first.. */ static inline unsigned long ffz(unsigned long word) { unsigned long result; result = -1; __asm__("1:\n\t" "shlr.l %2\n\t" "adds #1,%0\n\t" "bcs 1b" : "=r"(result) : "0"(result), "r"(word)); return result; } #define H8300_GEN_BITOP(FNAME, OP) \ static inline void FNAME(int nr, volatile unsigned long *addr) \ { \ unsigned char *b_addr; \ unsigned char bit = nr & 7; \ \ b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \ if (__builtin_constant_p(nr)) { \ __asm__(OP " %1,%0" : "+WU"(*b_addr) : "i"(nr & 7)); \ } else { \ __asm__(OP " %s1,%0" : "+WU"(*b_addr) : "r"(bit)); \ } \ } /* * clear_bit() doesn't provide any barrier for the compiler. */ #define smp_mb__before_clear_bit() barrier() #define smp_mb__after_clear_bit() barrier() H8300_GEN_BITOP(set_bit, "bset") H8300_GEN_BITOP(clear_bit, "bclr") H8300_GEN_BITOP(change_bit, "bnot") #define __set_bit(nr, addr) set_bit((nr), (addr)) #define __clear_bit(nr, addr) clear_bit((nr), (addr)) #define __change_bit(nr, addr) change_bit((nr), (addr)) #undef H8300_GEN_BITOP static inline int test_bit(int nr, const unsigned long *addr) { int ret = 0; unsigned char *b_addr; unsigned char bit = nr & 7; b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); if (__builtin_constant_p(nr)) { __asm__("bld %Z2,%1\n\t" "rotxl %0\n\t" : "=r"(ret) : "WU"(*b_addr), "i"(nr & 7), "0"(ret) : "cc"); } else { __asm__("btst %w2,%1\n\t" "beq 1f\n\t" "inc.l #1,%0\n" "1:" : "=r"(ret) : "WU"(*b_addr), "r"(bit), "0"(ret) : "cc"); } return ret; } #define __test_bit(nr, addr) test_bit(nr, addr) #define H8300_GEN_TEST_BITOP(FNNAME, OP) \ static inline int FNNAME(int nr, void *addr) \ { \ int retval = 0; \ char ccrsave; \ unsigned char *b_addr; \ unsigned char bit = nr & 7; \ \ b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \ if (__builtin_constant_p(nr)) { \ __asm__("stc ccr,%s2\n\t" \ "orc #0x80,ccr\n\t" \ "bld %4,%1\n\t" \ OP " %4,%1\n\t" \ "rotxl.l %0\n\t" \ "ldc %s2,ccr" \ : "=r"(retval), "+WU" (*b_addr), "=&r"(ccrsave) \ : "0"(retval), "i"(nr & 7) : "cc"); \ } else { \ __asm__("stc ccr,%t3\n\t" \ "orc #0x80,ccr\n\t" \ "btst %s3,%1\n\t" \ OP " %s3,%1\n\t" \ "beq 1f\n\t" \ "inc.l #1,%0\n\t" \ "1:\n" \ "ldc %t3,ccr" \ : "=r"(retval), "+WU" (*b_addr) \ : "0" (retval), "r"(bit) : "cc"); \ } \ return retval; \ } \ \ static inline int __ ## FNNAME(int nr, void *addr) \ { \ int retval = 0; \ unsigned char *b_addr; \ unsigned char bit = nr & 7; \ \ b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \ if (__builtin_constant_p(nr)) { \ __asm__("bld %3,%1\n\t" \ OP " %3,%1\n\t" \ "rotxl.l %0\n\t" \ : "=r"(retval), "+WU"(*b_addr) \ : "0" (retval), "i"(nr & 7)); \ } else { \ __asm__("btst %s3,%1\n\t" \ OP " %s3,%1\n\t" \ "beq 1f\n\t" \ "inc.l #1,%0\n\t" \ "1:" \ : "=r"(retval), "+WU"(*b_addr) \ : "0" (retval), "r"(bit)); \ } \ return retval; \ } H8300_GEN_TEST_BITOP(test_and_set_bit, "bset") H8300_GEN_TEST_BITOP(test_and_clear_bit, "bclr") H8300_GEN_TEST_BITOP(test_and_change_bit, "bnot") #undef H8300_GEN_TEST_BITOP #include <asm-generic/bitops/ffs.h> static inline unsigned long __ffs(unsigned long word) { unsigned long result; result = -1; __asm__("1:\n\t" "shlr.l %2\n\t" "adds #1,%0\n\t" "bcc 1b" : "=r" (result) : "0"(result), "r"(word)); return result; } #include <asm-generic/bitops/find.h> #include <asm-generic/bitops/sched.h> #include <asm-generic/bitops/hweight.h> #include <asm-generic/bitops/lock.h> #include <asm-generic/bitops/le.h> #include <asm-generic/bitops/ext2-atomic.h> #endif /* __KERNEL__ */ #include <asm-generic/bitops/fls.h> #include <asm-generic/bitops/__fls.h> #include <asm-generic/bitops/fls64.h> #endif /* _H8300_BITOPS_H */ |