mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
9ddabc2a29
Like fls, but can't be handed 0 and returns the bit number. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
214 lines
6.1 KiB
C
214 lines
6.1 KiB
C
#ifndef _H8300_BITOPS_H
|
|
#define _H8300_BITOPS_H
|
|
|
|
/*
|
|
* Copyright 1992, Linus Torvalds.
|
|
* Copyright 2002, Yoshinori Sato
|
|
*/
|
|
|
|
#include <linux/compiler.h>
|
|
#include <asm/system.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_CONST(OP,BIT) \
|
|
case BIT: \
|
|
__asm__(OP " #" #BIT ",@%0"::"r"(b_addr):"memory"); \
|
|
break;
|
|
|
|
#define H8300_GEN_BITOP(FNAME,OP) \
|
|
static __inline__ void FNAME(int nr, volatile unsigned long* addr) \
|
|
{ \
|
|
volatile unsigned char *b_addr; \
|
|
b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3); \
|
|
if (__builtin_constant_p(nr)) { \
|
|
switch(nr & 7) { \
|
|
H8300_GEN_BITOP_CONST(OP,0) \
|
|
H8300_GEN_BITOP_CONST(OP,1) \
|
|
H8300_GEN_BITOP_CONST(OP,2) \
|
|
H8300_GEN_BITOP_CONST(OP,3) \
|
|
H8300_GEN_BITOP_CONST(OP,4) \
|
|
H8300_GEN_BITOP_CONST(OP,5) \
|
|
H8300_GEN_BITOP_CONST(OP,6) \
|
|
H8300_GEN_BITOP_CONST(OP,7) \
|
|
} \
|
|
} else { \
|
|
__asm__(OP " %w0,@%1"::"r"(nr),"r"(b_addr):"memory"); \
|
|
} \
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
#undef H8300_GEN_BITOP_CONST
|
|
|
|
static __inline__ int test_bit(int nr, const unsigned long* addr)
|
|
{
|
|
return (*((volatile unsigned char *)addr +
|
|
((nr >> 3) ^ 3)) & (1UL << (nr & 7))) != 0;
|
|
}
|
|
|
|
#define __test_bit(nr, addr) test_bit(nr, addr)
|
|
|
|
#define H8300_GEN_TEST_BITOP_CONST_INT(OP,BIT) \
|
|
case BIT: \
|
|
__asm__("stc ccr,%w1\n\t" \
|
|
"orc #0x80,ccr\n\t" \
|
|
"bld #" #BIT ",@%4\n\t" \
|
|
OP " #" #BIT ",@%4\n\t" \
|
|
"rotxl.l %0\n\t" \
|
|
"ldc %w1,ccr" \
|
|
: "=r"(retval),"=&r"(ccrsave),"=m"(*b_addr) \
|
|
: "0" (retval),"r" (b_addr) \
|
|
: "memory"); \
|
|
break;
|
|
|
|
#define H8300_GEN_TEST_BITOP_CONST(OP,BIT) \
|
|
case BIT: \
|
|
__asm__("bld #" #BIT ",@%3\n\t" \
|
|
OP " #" #BIT ",@%3\n\t" \
|
|
"rotxl.l %0\n\t" \
|
|
: "=r"(retval),"=m"(*b_addr) \
|
|
: "0" (retval),"r" (b_addr) \
|
|
: "memory"); \
|
|
break;
|
|
|
|
#define H8300_GEN_TEST_BITOP(FNNAME,OP) \
|
|
static __inline__ int FNNAME(int nr, volatile void * addr) \
|
|
{ \
|
|
int retval = 0; \
|
|
char ccrsave; \
|
|
volatile unsigned char *b_addr; \
|
|
b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3); \
|
|
if (__builtin_constant_p(nr)) { \
|
|
switch(nr & 7) { \
|
|
H8300_GEN_TEST_BITOP_CONST_INT(OP,0) \
|
|
H8300_GEN_TEST_BITOP_CONST_INT(OP,1) \
|
|
H8300_GEN_TEST_BITOP_CONST_INT(OP,2) \
|
|
H8300_GEN_TEST_BITOP_CONST_INT(OP,3) \
|
|
H8300_GEN_TEST_BITOP_CONST_INT(OP,4) \
|
|
H8300_GEN_TEST_BITOP_CONST_INT(OP,5) \
|
|
H8300_GEN_TEST_BITOP_CONST_INT(OP,6) \
|
|
H8300_GEN_TEST_BITOP_CONST_INT(OP,7) \
|
|
} \
|
|
} else { \
|
|
__asm__("stc ccr,%w1\n\t" \
|
|
"orc #0x80,ccr\n\t" \
|
|
"btst %w5,@%4\n\t" \
|
|
OP " %w5,@%4\n\t" \
|
|
"beq 1f\n\t" \
|
|
"inc.l #1,%0\n" \
|
|
"1:\n\t" \
|
|
"ldc %w1,ccr" \
|
|
: "=r"(retval),"=&r"(ccrsave),"=m"(*b_addr) \
|
|
: "0" (retval),"r" (b_addr),"r"(nr) \
|
|
: "memory"); \
|
|
} \
|
|
return retval; \
|
|
} \
|
|
\
|
|
static __inline__ int __ ## FNNAME(int nr, volatile void * addr) \
|
|
{ \
|
|
int retval = 0; \
|
|
volatile unsigned char *b_addr; \
|
|
b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3); \
|
|
if (__builtin_constant_p(nr)) { \
|
|
switch(nr & 7) { \
|
|
H8300_GEN_TEST_BITOP_CONST(OP,0) \
|
|
H8300_GEN_TEST_BITOP_CONST(OP,1) \
|
|
H8300_GEN_TEST_BITOP_CONST(OP,2) \
|
|
H8300_GEN_TEST_BITOP_CONST(OP,3) \
|
|
H8300_GEN_TEST_BITOP_CONST(OP,4) \
|
|
H8300_GEN_TEST_BITOP_CONST(OP,5) \
|
|
H8300_GEN_TEST_BITOP_CONST(OP,6) \
|
|
H8300_GEN_TEST_BITOP_CONST(OP,7) \
|
|
} \
|
|
} else { \
|
|
__asm__("btst %w4,@%3\n\t" \
|
|
OP " %w4,@%3\n\t" \
|
|
"beq 1f\n\t" \
|
|
"inc.l #1,%0\n" \
|
|
"1:" \
|
|
: "=r"(retval),"=m"(*b_addr) \
|
|
: "0" (retval),"r" (b_addr),"r"(nr) \
|
|
: "memory"); \
|
|
} \
|
|
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_CONST
|
|
#undef H8300_GEN_TEST_BITOP_CONST_INT
|
|
#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/ext2-non-atomic.h>
|
|
#include <asm-generic/bitops/ext2-atomic.h>
|
|
#include <asm-generic/bitops/minix.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 */
|