1 /* $Id: bitops.h,v 1.67 2001/11/19 18:36:34 davem Exp $
2 * bitops.h: Bit string operations on the Sparc.
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)
9 #ifndef _SPARC_BITOPS_H
10 #define _SPARC_BITOPS_H
12 #include <linux/compiler.h>
13 #include <asm/byteorder.h>
17 #ifndef _LINUX_BITOPS_H
18 #error only <linux/bitops.h> can be included directly
21 extern unsigned long ___set_bit(unsigned long *addr, unsigned long mask);
22 extern unsigned long ___clear_bit(unsigned long *addr, unsigned long mask);
23 extern unsigned long ___change_bit(unsigned long *addr, unsigned long mask);
26 * Set bit 'nr' in 32-bit quantity at address 'addr' where bit '0'
27 * is in the highest of the four bytes and bit '31' is the high bit
28 * within the first byte. Sparc is BIG-Endian. Unless noted otherwise
29 * all bit-ops return 0 if bit was previously clear and != 0 otherwise.
31 static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *addr)
33 unsigned long *ADDR, mask;
35 ADDR = ((unsigned long *) addr) + (nr >> 5);
36 mask = 1 << (nr & 31);
38 return ___set_bit(ADDR, mask) != 0;
41 static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
43 unsigned long *ADDR, mask;
45 ADDR = ((unsigned long *) addr) + (nr >> 5);
46 mask = 1 << (nr & 31);
48 (void) ___set_bit(ADDR, mask);
51 static inline int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr)
53 unsigned long *ADDR, mask;
55 ADDR = ((unsigned long *) addr) + (nr >> 5);
56 mask = 1 << (nr & 31);
58 return ___clear_bit(ADDR, mask) != 0;
61 static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
63 unsigned long *ADDR, mask;
65 ADDR = ((unsigned long *) addr) + (nr >> 5);
66 mask = 1 << (nr & 31);
68 (void) ___clear_bit(ADDR, mask);
71 static inline int test_and_change_bit(unsigned long nr, volatile unsigned long *addr)
73 unsigned long *ADDR, mask;
75 ADDR = ((unsigned long *) addr) + (nr >> 5);
76 mask = 1 << (nr & 31);
78 return ___change_bit(ADDR, mask) != 0;
81 static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
83 unsigned long *ADDR, mask;
85 ADDR = ((unsigned long *) addr) + (nr >> 5);
86 mask = 1 << (nr & 31);
88 (void) ___change_bit(ADDR, mask);
91 #include <asm-generic/bitops/non-atomic.h>
93 #define smp_mb__before_clear_bit() do { } while(0)
94 #define smp_mb__after_clear_bit() do { } while(0)
96 #include <asm-generic/bitops/ffz.h>
97 #include <asm-generic/bitops/__ffs.h>
98 #include <asm-generic/bitops/sched.h>
99 #include <asm-generic/bitops/ffs.h>
100 #include <asm-generic/bitops/fls.h>
101 #include <asm-generic/bitops/fls64.h>
102 #include <asm-generic/bitops/hweight.h>
103 #include <asm-generic/bitops/lock.h>
104 #include <asm-generic/bitops/find.h>
105 #include <asm-generic/bitops/ext2-non-atomic.h>
106 #include <asm-generic/bitops/ext2-atomic.h>
107 #include <asm-generic/bitops/minix.h>
109 #endif /* __KERNEL__ */
111 #endif /* defined(_SPARC_BITOPS_H) */