186 lines
4.4 KiB
C
186 lines
4.4 KiB
C
#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 */
|