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Diffstat (limited to 'arch/h8300/include/asm/bitops.h')
| -rw-r--r-- | arch/h8300/include/asm/bitops.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/arch/h8300/include/asm/bitops.h b/arch/h8300/include/asm/bitops.h new file mode 100644 index 000000000..647a83bd4 --- /dev/null +++ b/arch/h8300/include/asm/bitops.h @@ -0,0 +1,186 @@ +/* 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 %1\n\t" + "adds #1,%0\n\t" + "bcs 1b" + : "=r"(result),"=r"(word) + : "0"(result), "1"(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 volatile 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 %1\n\t" + "adds #1,%0\n\t" + "bcc 1b" + : "=r" (result),"=r"(word) + : "0"(result), "1"(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 */ |