187 lines
4.4 KiB
C
187 lines
4.4 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _H8300_BITOPS_H
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#define _H8300_BITOPS_H
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/*
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* Copyright 1992, Linus Torvalds.
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* Copyright 2002, Yoshinori Sato
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*/
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#include <linux/compiler.h>
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#ifdef __KERNEL__
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#ifndef _LINUX_BITOPS_H
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#error only <linux/bitops.h> can be included directly
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#endif
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/*
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* Function prototypes to keep gcc -Wall happy
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*/
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/*
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* ffz = Find First Zero in word. Undefined if no zero exists,
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* so code should check against ~0UL first..
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*/
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static inline unsigned long ffz(unsigned long word)
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{
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unsigned long result;
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result = -1;
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__asm__("1:\n\t"
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"shlr.l %2\n\t"
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"adds #1,%0\n\t"
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"bcs 1b"
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: "=r"(result)
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: "0"(result), "r"(word));
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return result;
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}
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#define H8300_GEN_BITOP(FNAME, OP) \
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static inline void FNAME(int nr, volatile unsigned long *addr) \
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{ \
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unsigned char *b_addr; \
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unsigned char bit = nr & 7; \
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\
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b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \
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if (__builtin_constant_p(nr)) { \
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__asm__(OP " %1,%0" : "+WU"(*b_addr) : "i"(nr & 7)); \
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} else { \
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__asm__(OP " %s1,%0" : "+WU"(*b_addr) : "r"(bit)); \
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} \
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}
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/*
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* clear_bit() doesn't provide any barrier for the compiler.
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*/
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#define smp_mb__before_clear_bit() barrier()
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#define smp_mb__after_clear_bit() barrier()
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H8300_GEN_BITOP(set_bit, "bset")
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H8300_GEN_BITOP(clear_bit, "bclr")
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H8300_GEN_BITOP(change_bit, "bnot")
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#define __set_bit(nr, addr) set_bit((nr), (addr))
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#define __clear_bit(nr, addr) clear_bit((nr), (addr))
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#define __change_bit(nr, addr) change_bit((nr), (addr))
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#undef H8300_GEN_BITOP
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static inline int test_bit(int nr, const unsigned long *addr)
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{
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int ret = 0;
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unsigned char *b_addr;
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unsigned char bit = nr & 7;
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b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3);
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if (__builtin_constant_p(nr)) {
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__asm__("bld %Z2,%1\n\t"
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"rotxl %0\n\t"
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: "=r"(ret)
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: "WU"(*b_addr), "i"(nr & 7), "0"(ret) : "cc");
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} else {
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__asm__("btst %w2,%1\n\t"
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"beq 1f\n\t"
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"inc.l #1,%0\n"
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"1:"
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: "=r"(ret)
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: "WU"(*b_addr), "r"(bit), "0"(ret) : "cc");
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}
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return ret;
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}
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#define __test_bit(nr, addr) test_bit(nr, addr)
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#define H8300_GEN_TEST_BITOP(FNNAME, OP) \
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static inline int FNNAME(int nr, void *addr) \
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{ \
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int retval = 0; \
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char ccrsave; \
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unsigned char *b_addr; \
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unsigned char bit = nr & 7; \
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\
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b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \
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if (__builtin_constant_p(nr)) { \
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__asm__("stc ccr,%s2\n\t" \
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"orc #0x80,ccr\n\t" \
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"bld %4,%1\n\t" \
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OP " %4,%1\n\t" \
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"rotxl.l %0\n\t" \
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"ldc %s2,ccr" \
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: "=r"(retval), "+WU" (*b_addr), "=&r"(ccrsave) \
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: "0"(retval), "i"(nr & 7) : "cc"); \
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} else { \
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__asm__("stc ccr,%t3\n\t" \
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"orc #0x80,ccr\n\t" \
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"btst %s3,%1\n\t" \
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OP " %s3,%1\n\t" \
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"beq 1f\n\t" \
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"inc.l #1,%0\n\t" \
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"1:\n" \
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"ldc %t3,ccr" \
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: "=r"(retval), "+WU" (*b_addr) \
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: "0" (retval), "r"(bit) : "cc"); \
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} \
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return retval; \
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} \
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\
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static inline int __ ## FNNAME(int nr, void *addr) \
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{ \
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int retval = 0; \
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unsigned char *b_addr; \
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unsigned char bit = nr & 7; \
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\
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b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \
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if (__builtin_constant_p(nr)) { \
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__asm__("bld %3,%1\n\t" \
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OP " %3,%1\n\t" \
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"rotxl.l %0\n\t" \
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: "=r"(retval), "+WU"(*b_addr) \
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: "0" (retval), "i"(nr & 7)); \
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} else { \
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__asm__("btst %s3,%1\n\t" \
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OP " %s3,%1\n\t" \
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"beq 1f\n\t" \
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"inc.l #1,%0\n\t" \
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"1:" \
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: "=r"(retval), "+WU"(*b_addr) \
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: "0" (retval), "r"(bit)); \
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} \
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return retval; \
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}
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H8300_GEN_TEST_BITOP(test_and_set_bit, "bset")
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H8300_GEN_TEST_BITOP(test_and_clear_bit, "bclr")
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H8300_GEN_TEST_BITOP(test_and_change_bit, "bnot")
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#undef H8300_GEN_TEST_BITOP
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#include <asm-generic/bitops/ffs.h>
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static inline unsigned long __ffs(unsigned long word)
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{
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unsigned long result;
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result = -1;
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__asm__("1:\n\t"
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"shlr.l %2\n\t"
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"adds #1,%0\n\t"
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"bcc 1b"
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: "=r" (result)
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: "0"(result), "r"(word));
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return result;
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}
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#include <asm-generic/bitops/find.h>
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#include <asm-generic/bitops/sched.h>
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#include <asm-generic/bitops/hweight.h>
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#include <asm-generic/bitops/lock.h>
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#include <asm-generic/bitops/le.h>
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#include <asm-generic/bitops/ext2-atomic.h>
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#endif /* __KERNEL__ */
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#include <asm-generic/bitops/fls.h>
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#include <asm-generic/bitops/__fls.h>
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#include <asm-generic/bitops/fls64.h>
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#endif /* _H8300_BITOPS_H */
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