linux/include/asm-sparc/bitops.h

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/* $Id: bitops.h,v 1.67 2001/11/19 18:36:34 davem Exp $
* bitops.h: Bit string operations on the Sparc.
*
* Copyright 1995 David S. Miller (davem@caip.rutgers.edu)
* Copyright 1996 Eddie C. Dost (ecd@skynet.be)
* Copyright 2001 Anton Blanchard (anton@samba.org)
*/
#ifndef _SPARC_BITOPS_H
#define _SPARC_BITOPS_H
#include <linux/compiler.h>
#include <asm/byteorder.h>
#ifdef __KERNEL__
#ifndef _LINUX_BITOPS_H
#error only <linux/bitops.h> can be included directly
#endif
extern unsigned long ___set_bit(unsigned long *addr, unsigned long mask);
extern unsigned long ___clear_bit(unsigned long *addr, unsigned long mask);
extern unsigned long ___change_bit(unsigned long *addr, unsigned long mask);
/*
* Set bit 'nr' in 32-bit quantity at address 'addr' where bit '0'
* is in the highest of the four bytes and bit '31' is the high bit
* within the first byte. Sparc is BIG-Endian. Unless noted otherwise
* all bit-ops return 0 if bit was previously clear and != 0 otherwise.
*/
static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *addr)
{
unsigned long *ADDR, mask;
ADDR = ((unsigned long *) addr) + (nr >> 5);
mask = 1 << (nr & 31);
return ___set_bit(ADDR, mask) != 0;
}
static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
{
unsigned long *ADDR, mask;
ADDR = ((unsigned long *) addr) + (nr >> 5);
mask = 1 << (nr & 31);
(void) ___set_bit(ADDR, mask);
}
static inline int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr)
{
unsigned long *ADDR, mask;
ADDR = ((unsigned long *) addr) + (nr >> 5);
mask = 1 << (nr & 31);
return ___clear_bit(ADDR, mask) != 0;
}
static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
{
unsigned long *ADDR, mask;
ADDR = ((unsigned long *) addr) + (nr >> 5);
mask = 1 << (nr & 31);
(void) ___clear_bit(ADDR, mask);
}
static inline int test_and_change_bit(unsigned long nr, volatile unsigned long *addr)
{
unsigned long *ADDR, mask;
ADDR = ((unsigned long *) addr) + (nr >> 5);
mask = 1 << (nr & 31);
return ___change_bit(ADDR, mask) != 0;
}
static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
{
unsigned long *ADDR, mask;
ADDR = ((unsigned long *) addr) + (nr >> 5);
mask = 1 << (nr & 31);
(void) ___change_bit(ADDR, mask);
}
#include <asm-generic/bitops/non-atomic.h>
#define smp_mb__before_clear_bit() do { } while(0)
#define smp_mb__after_clear_bit() do { } while(0)
#include <asm-generic/bitops/ffz.h>
#include <asm-generic/bitops/__ffs.h>
#include <asm-generic/bitops/sched.h>
#include <asm-generic/bitops/ffs.h>
#include <asm-generic/bitops/fls.h>
#include <asm-generic/bitops/fls64.h>
#include <asm-generic/bitops/hweight.h>
bitops: introduce lock ops 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>
2007-10-18 12:06:39 +02:00
#include <asm-generic/bitops/lock.h>
#include <asm-generic/bitops/find.h>
#include <asm-generic/bitops/ext2-non-atomic.h>
#include <asm-generic/bitops/ext2-atomic.h>
#include <asm-generic/bitops/minix.h>
#endif /* __KERNEL__ */
#endif /* defined(_SPARC_BITOPS_H) */