0624517d80
forbid asm/bitops.h direct inclusion Because of compile errors that may occur after bit changes if asm/bitops.h is included directly without e.g. linux/kernel.h which includes linux/bitops.h, forbid direct inclusion of asm/bitops.h. Thanks to Adrian Bunk. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Adrian Bunk <bunk@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
156 lines
3.0 KiB
C
156 lines
3.0 KiB
C
#ifndef __ASM_SH_BITOPS_H
|
|
#define __ASM_SH_BITOPS_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#ifndef _LINUX_BITOPS_H
|
|
#error only <linux/bitops.h> can be included directly
|
|
#endif
|
|
|
|
#include <asm/system.h>
|
|
/* For __swab32 */
|
|
#include <asm/byteorder.h>
|
|
|
|
static inline void set_bit(int nr, volatile void * addr)
|
|
{
|
|
int mask;
|
|
volatile unsigned int *a = addr;
|
|
unsigned long flags;
|
|
|
|
a += nr >> 5;
|
|
mask = 1 << (nr & 0x1f);
|
|
local_irq_save(flags);
|
|
*a |= mask;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
/*
|
|
* clear_bit() doesn't provide any barrier for the compiler.
|
|
*/
|
|
#define smp_mb__before_clear_bit() barrier()
|
|
#define smp_mb__after_clear_bit() barrier()
|
|
static inline void clear_bit(int nr, volatile void * addr)
|
|
{
|
|
int mask;
|
|
volatile unsigned int *a = addr;
|
|
unsigned long flags;
|
|
|
|
a += nr >> 5;
|
|
mask = 1 << (nr & 0x1f);
|
|
local_irq_save(flags);
|
|
*a &= ~mask;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static inline void change_bit(int nr, volatile void * addr)
|
|
{
|
|
int mask;
|
|
volatile unsigned int *a = addr;
|
|
unsigned long flags;
|
|
|
|
a += nr >> 5;
|
|
mask = 1 << (nr & 0x1f);
|
|
local_irq_save(flags);
|
|
*a ^= mask;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static inline int test_and_set_bit(int nr, volatile void * addr)
|
|
{
|
|
int mask, retval;
|
|
volatile unsigned int *a = addr;
|
|
unsigned long flags;
|
|
|
|
a += nr >> 5;
|
|
mask = 1 << (nr & 0x1f);
|
|
local_irq_save(flags);
|
|
retval = (mask & *a) != 0;
|
|
*a |= mask;
|
|
local_irq_restore(flags);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static inline int test_and_clear_bit(int nr, volatile void * addr)
|
|
{
|
|
int mask, retval;
|
|
volatile unsigned int *a = addr;
|
|
unsigned long flags;
|
|
|
|
a += nr >> 5;
|
|
mask = 1 << (nr & 0x1f);
|
|
local_irq_save(flags);
|
|
retval = (mask & *a) != 0;
|
|
*a &= ~mask;
|
|
local_irq_restore(flags);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static inline int test_and_change_bit(int nr, volatile void * addr)
|
|
{
|
|
int mask, retval;
|
|
volatile unsigned int *a = addr;
|
|
unsigned long flags;
|
|
|
|
a += nr >> 5;
|
|
mask = 1 << (nr & 0x1f);
|
|
local_irq_save(flags);
|
|
retval = (mask & *a) != 0;
|
|
*a ^= mask;
|
|
local_irq_restore(flags);
|
|
|
|
return retval;
|
|
}
|
|
|
|
#include <asm-generic/bitops/non-atomic.h>
|
|
|
|
static inline unsigned long ffz(unsigned long word)
|
|
{
|
|
unsigned long result;
|
|
|
|
__asm__("1:\n\t"
|
|
"shlr %1\n\t"
|
|
"bt/s 1b\n\t"
|
|
" add #1, %0"
|
|
: "=r" (result), "=r" (word)
|
|
: "0" (~0L), "1" (word)
|
|
: "t");
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* __ffs - find first bit in word.
|
|
* @word: The word to search
|
|
*
|
|
* Undefined if no bit exists, so code should check against 0 first.
|
|
*/
|
|
static inline unsigned long __ffs(unsigned long word)
|
|
{
|
|
unsigned long result;
|
|
|
|
__asm__("1:\n\t"
|
|
"shlr %1\n\t"
|
|
"bf/s 1b\n\t"
|
|
" add #1, %0"
|
|
: "=r" (result), "=r" (word)
|
|
: "0" (~0L), "1" (word)
|
|
: "t");
|
|
return result;
|
|
}
|
|
|
|
#include <asm-generic/bitops/find.h>
|
|
#include <asm-generic/bitops/ffs.h>
|
|
#include <asm-generic/bitops/hweight.h>
|
|
#include <asm-generic/bitops/lock.h>
|
|
#include <asm-generic/bitops/sched.h>
|
|
#include <asm-generic/bitops/ext2-non-atomic.h>
|
|
#include <asm-generic/bitops/ext2-atomic.h>
|
|
#include <asm-generic/bitops/minix.h>
|
|
#include <asm-generic/bitops/fls.h>
|
|
#include <asm-generic/bitops/fls64.h>
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* __ASM_SH_BITOPS_H */
|