26333576fd
Introduce test_and_set_bit_lock / clear_bit_unlock bitops with lock semantics. Convert all architectures to use the generic implementation. Signed-off-by: Nick Piggin <npiggin@suse.de> Acked-By: David Howells <dhowells@redhat.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Bryan Wu <bryan.wu@analog.com> Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Greg Ungerer <gerg@uclinux.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Matthew Wilcox <willy@debian.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Cc: Richard Curnow <rc@rc0.org.uk> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Cc: Andi Kleen <ak@muc.de> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
214 lines
4.4 KiB
C
214 lines
4.4 KiB
C
#ifndef _BLACKFIN_BITOPS_H
|
|
#define _BLACKFIN_BITOPS_H
|
|
|
|
/*
|
|
* Copyright 1992, Linus Torvalds.
|
|
*/
|
|
|
|
#include <linux/compiler.h>
|
|
#include <asm/byteorder.h> /* swab32 */
|
|
#include <asm/system.h> /* save_flags */
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm-generic/bitops/ffs.h>
|
|
#include <asm-generic/bitops/__ffs.h>
|
|
#include <asm-generic/bitops/sched.h>
|
|
#include <asm-generic/bitops/ffz.h>
|
|
|
|
static __inline__ void set_bit(int nr, volatile unsigned long *addr)
|
|
{
|
|
int *a = (int *)addr;
|
|
int mask;
|
|
unsigned long flags;
|
|
|
|
a += nr >> 5;
|
|
mask = 1 << (nr & 0x1f);
|
|
local_irq_save(flags);
|
|
*a |= mask;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static __inline__ void __set_bit(int nr, volatile unsigned long *addr)
|
|
{
|
|
int *a = (int *)addr;
|
|
int mask;
|
|
|
|
a += nr >> 5;
|
|
mask = 1 << (nr & 0x1f);
|
|
*a |= mask;
|
|
}
|
|
|
|
/*
|
|
* 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 unsigned long *addr)
|
|
{
|
|
int *a = (int *)addr;
|
|
int mask;
|
|
unsigned long flags;
|
|
a += nr >> 5;
|
|
mask = 1 << (nr & 0x1f);
|
|
local_irq_save(flags);
|
|
*a &= ~mask;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static __inline__ void __clear_bit(int nr, volatile unsigned long *addr)
|
|
{
|
|
int *a = (int *)addr;
|
|
int mask;
|
|
|
|
a += nr >> 5;
|
|
mask = 1 << (nr & 0x1f);
|
|
*a &= ~mask;
|
|
}
|
|
|
|
static __inline__ void change_bit(int nr, volatile unsigned long *addr)
|
|
{
|
|
int mask, flags;
|
|
unsigned long *ADDR = (unsigned long *)addr;
|
|
|
|
ADDR += nr >> 5;
|
|
mask = 1 << (nr & 31);
|
|
local_irq_save(flags);
|
|
*ADDR ^= mask;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static __inline__ void __change_bit(int nr, volatile unsigned long *addr)
|
|
{
|
|
int mask;
|
|
unsigned long *ADDR = (unsigned long *)addr;
|
|
|
|
ADDR += nr >> 5;
|
|
mask = 1 << (nr & 31);
|
|
*ADDR ^= mask;
|
|
}
|
|
|
|
static __inline__ int test_and_set_bit(int nr, void *addr)
|
|
{
|
|
int mask, retval;
|
|
volatile unsigned int *a = (volatile unsigned int *)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_set_bit(int nr, volatile unsigned long *addr)
|
|
{
|
|
int mask, retval;
|
|
volatile unsigned int *a = (volatile unsigned int *)addr;
|
|
|
|
a += nr >> 5;
|
|
mask = 1 << (nr & 0x1f);
|
|
retval = (mask & *a) != 0;
|
|
*a |= mask;
|
|
return retval;
|
|
}
|
|
|
|
static __inline__ int test_and_clear_bit(int nr, volatile unsigned long *addr)
|
|
{
|
|
int mask, retval;
|
|
volatile unsigned int *a = (volatile unsigned int *)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 unsigned long *addr)
|
|
{
|
|
int mask, retval;
|
|
volatile unsigned int *a = (volatile unsigned int *)addr;
|
|
|
|
a += nr >> 5;
|
|
mask = 1 << (nr & 0x1f);
|
|
retval = (mask & *a) != 0;
|
|
*a &= ~mask;
|
|
return retval;
|
|
}
|
|
|
|
static __inline__ int test_and_change_bit(int nr, volatile unsigned long *addr)
|
|
{
|
|
int mask, retval;
|
|
volatile unsigned int *a = (volatile unsigned int *)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 unsigned long *addr)
|
|
{
|
|
int mask, retval;
|
|
volatile unsigned int *a = (volatile unsigned int *)addr;
|
|
|
|
a += nr >> 5;
|
|
mask = 1 << (nr & 0x1f);
|
|
retval = (mask & *a) != 0;
|
|
*a ^= mask;
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* This routine doesn't need to be atomic.
|
|
*/
|
|
static __inline__ int __constant_test_bit(int nr, const void *addr)
|
|
{
|
|
return ((1UL << (nr & 31)) &
|
|
(((const volatile unsigned int *)addr)[nr >> 5])) != 0;
|
|
}
|
|
|
|
static __inline__ int __test_bit(int nr, const void *addr)
|
|
{
|
|
int *a = (int *)addr;
|
|
int mask;
|
|
|
|
a += nr >> 5;
|
|
mask = 1 << (nr & 0x1f);
|
|
return ((mask & *a) != 0);
|
|
}
|
|
|
|
#define test_bit(nr,addr) \
|
|
(__builtin_constant_p(nr) ? \
|
|
__constant_test_bit((nr),(addr)) : \
|
|
__test_bit((nr),(addr)))
|
|
|
|
#include <asm-generic/bitops/find.h>
|
|
#include <asm-generic/bitops/hweight.h>
|
|
#include <asm-generic/bitops/lock.h>
|
|
|
|
#include <asm-generic/bitops/ext2-atomic.h>
|
|
#include <asm-generic/bitops/ext2-non-atomic.h>
|
|
|
|
#include <asm-generic/bitops/minix.h>
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#include <asm-generic/bitops/fls.h>
|
|
#include <asm-generic/bitops/fls64.h>
|
|
|
|
#endif /* _BLACKFIN_BITOPS_H */
|