1/* $Id: bitops.h,v 1.1.1.1 2007/08/03 18:53:36 Exp $
2 * bitops.h: Bit string operations on the Sparc.
3 *
4 * Copyright 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright 1996 Eddie C. Dost   (ecd@skynet.be)
6 * Copyright 2001 Anton Blanchard (anton@samba.org)
7 */
8
9#ifndef _SPARC_BITOPS_H
10#define _SPARC_BITOPS_H
11
12#include <linux/compiler.h>
13#include <asm/byteorder.h>
14
15#ifdef __KERNEL__
16
17extern unsigned long ___set_bit(unsigned long *addr, unsigned long mask);
18extern unsigned long ___clear_bit(unsigned long *addr, unsigned long mask);
19extern unsigned long ___change_bit(unsigned long *addr, unsigned long mask);
20
21/*
22 * Set bit 'nr' in 32-bit quantity at address 'addr' where bit '0'
23 * is in the highest of the four bytes and bit '31' is the high bit
24 * within the first byte. Sparc is BIG-Endian. Unless noted otherwise
25 * all bit-ops return 0 if bit was previously clear and != 0 otherwise.
26 */
27static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *addr)
28{
29	unsigned long *ADDR, mask;
30
31	ADDR = ((unsigned long *) addr) + (nr >> 5);
32	mask = 1 << (nr & 31);
33
34	return ___set_bit(ADDR, mask) != 0;
35}
36
37static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
38{
39	unsigned long *ADDR, mask;
40
41	ADDR = ((unsigned long *) addr) + (nr >> 5);
42	mask = 1 << (nr & 31);
43
44	(void) ___set_bit(ADDR, mask);
45}
46
47static inline int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr)
48{
49	unsigned long *ADDR, mask;
50
51	ADDR = ((unsigned long *) addr) + (nr >> 5);
52	mask = 1 << (nr & 31);
53
54	return ___clear_bit(ADDR, mask) != 0;
55}
56
57static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
58{
59	unsigned long *ADDR, mask;
60
61	ADDR = ((unsigned long *) addr) + (nr >> 5);
62	mask = 1 << (nr & 31);
63
64	(void) ___clear_bit(ADDR, mask);
65}
66
67static inline int test_and_change_bit(unsigned long nr, volatile unsigned long *addr)
68{
69	unsigned long *ADDR, mask;
70
71	ADDR = ((unsigned long *) addr) + (nr >> 5);
72	mask = 1 << (nr & 31);
73
74	return ___change_bit(ADDR, mask) != 0;
75}
76
77static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
78{
79	unsigned long *ADDR, mask;
80
81	ADDR = ((unsigned long *) addr) + (nr >> 5);
82	mask = 1 << (nr & 31);
83
84	(void) ___change_bit(ADDR, mask);
85}
86
87#include <asm-generic/bitops/non-atomic.h>
88
89#define smp_mb__before_clear_bit()	do { } while(0)
90#define smp_mb__after_clear_bit()	do { } while(0)
91
92#include <asm-generic/bitops/ffz.h>
93#include <asm-generic/bitops/__ffs.h>
94#include <asm-generic/bitops/sched.h>
95#include <asm-generic/bitops/ffs.h>
96#include <asm-generic/bitops/fls.h>
97#include <asm-generic/bitops/fls64.h>
98#include <asm-generic/bitops/hweight.h>
99#include <asm-generic/bitops/find.h>
100#include <asm-generic/bitops/ext2-non-atomic.h>
101#include <asm-generic/bitops/ext2-atomic.h>
102#include <asm-generic/bitops/minix.h>
103
104#endif /* __KERNEL__ */
105
106#endif /* defined(_SPARC_BITOPS_H) */
107