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1 | /* $Id: bitops.h,v 1.67 2001/11/19 18:36:34 davem 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 | ||
0624517d JS |
17 | #ifndef _LINUX_BITOPS_H |
18 | #error only <linux/bitops.h> can be included directly | |
19 | #endif | |
20 | ||
8a8b836b DM |
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); | |
24 | ||
1da177e4 LT |
25 | /* |
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. | |
30 | */ | |
31 | static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *addr) | |
32 | { | |
8a8b836b | 33 | unsigned long *ADDR, mask; |
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34 | |
35 | ADDR = ((unsigned long *) addr) + (nr >> 5); | |
36 | mask = 1 << (nr & 31); | |
37 | ||
8a8b836b | 38 | return ___set_bit(ADDR, mask) != 0; |
1da177e4 LT |
39 | } |
40 | ||
41 | static inline void set_bit(unsigned long nr, volatile unsigned long *addr) | |
42 | { | |
8a8b836b | 43 | unsigned long *ADDR, mask; |
1da177e4 LT |
44 | |
45 | ADDR = ((unsigned long *) addr) + (nr >> 5); | |
46 | mask = 1 << (nr & 31); | |
47 | ||
8a8b836b | 48 | (void) ___set_bit(ADDR, mask); |
1da177e4 LT |
49 | } |
50 | ||
51 | static inline int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr) | |
52 | { | |
8a8b836b | 53 | unsigned long *ADDR, mask; |
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54 | |
55 | ADDR = ((unsigned long *) addr) + (nr >> 5); | |
56 | mask = 1 << (nr & 31); | |
57 | ||
8a8b836b | 58 | return ___clear_bit(ADDR, mask) != 0; |
1da177e4 LT |
59 | } |
60 | ||
61 | static inline void clear_bit(unsigned long nr, volatile unsigned long *addr) | |
62 | { | |
8a8b836b | 63 | unsigned long *ADDR, mask; |
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64 | |
65 | ADDR = ((unsigned long *) addr) + (nr >> 5); | |
66 | mask = 1 << (nr & 31); | |
67 | ||
8a8b836b | 68 | (void) ___clear_bit(ADDR, mask); |
1da177e4 LT |
69 | } |
70 | ||
71 | static inline int test_and_change_bit(unsigned long nr, volatile unsigned long *addr) | |
72 | { | |
8a8b836b | 73 | unsigned long *ADDR, mask; |
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74 | |
75 | ADDR = ((unsigned long *) addr) + (nr >> 5); | |
76 | mask = 1 << (nr & 31); | |
77 | ||
8a8b836b | 78 | return ___change_bit(ADDR, mask) != 0; |
1da177e4 LT |
79 | } |
80 | ||
81 | static inline void change_bit(unsigned long nr, volatile unsigned long *addr) | |
82 | { | |
8a8b836b | 83 | unsigned long *ADDR, mask; |
1da177e4 LT |
84 | |
85 | ADDR = ((unsigned long *) addr) + (nr >> 5); | |
86 | mask = 1 << (nr & 31); | |
87 | ||
8a8b836b | 88 | (void) ___change_bit(ADDR, mask); |
1da177e4 LT |
89 | } |
90 | ||
d59288b7 | 91 | #include <asm-generic/bitops/non-atomic.h> |
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92 | |
93 | #define smp_mb__before_clear_bit() do { } while(0) | |
94 | #define smp_mb__after_clear_bit() do { } while(0) | |
95 | ||
d59288b7 AM |
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> | |
26333576 | 103 | #include <asm-generic/bitops/lock.h> |
d59288b7 AM |
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> | |
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108 | |
109 | #endif /* __KERNEL__ */ | |
110 | ||
111 | #endif /* defined(_SPARC_BITOPS_H) */ |