xref: /openbmc/linux/arch/sparc/include/asm/bitops_32.h (revision e8e8e80ee047b131a0cd6a3e96e0f8dfa14f6d99)
1a439fe51SSam Ravnborg /*
2a439fe51SSam Ravnborg  * bitops.h: Bit string operations on the Sparc.
3a439fe51SSam Ravnborg  *
4a439fe51SSam Ravnborg  * Copyright 1995 David S. Miller (davem@caip.rutgers.edu)
5a439fe51SSam Ravnborg  * Copyright 1996 Eddie C. Dost   (ecd@skynet.be)
6a439fe51SSam Ravnborg  * Copyright 2001 Anton Blanchard (anton@samba.org)
7a439fe51SSam Ravnborg  */
8a439fe51SSam Ravnborg 
9a439fe51SSam Ravnborg #ifndef _SPARC_BITOPS_H
10a439fe51SSam Ravnborg #define _SPARC_BITOPS_H
11a439fe51SSam Ravnborg 
12a439fe51SSam Ravnborg #include <linux/compiler.h>
13a439fe51SSam Ravnborg #include <asm/byteorder.h>
14a439fe51SSam Ravnborg 
15a439fe51SSam Ravnborg #ifdef __KERNEL__
16a439fe51SSam Ravnborg 
17a439fe51SSam Ravnborg #ifndef _LINUX_BITOPS_H
18a439fe51SSam Ravnborg #error only <linux/bitops.h> can be included directly
19a439fe51SSam Ravnborg #endif
20a439fe51SSam Ravnborg 
21a439fe51SSam Ravnborg extern unsigned long ___set_bit(unsigned long *addr, unsigned long mask);
22a439fe51SSam Ravnborg extern unsigned long ___clear_bit(unsigned long *addr, unsigned long mask);
23a439fe51SSam Ravnborg extern unsigned long ___change_bit(unsigned long *addr, unsigned long mask);
24a439fe51SSam Ravnborg 
25a439fe51SSam Ravnborg /*
26a439fe51SSam Ravnborg  * Set bit 'nr' in 32-bit quantity at address 'addr' where bit '0'
27a439fe51SSam Ravnborg  * is in the highest of the four bytes and bit '31' is the high bit
28a439fe51SSam Ravnborg  * within the first byte. Sparc is BIG-Endian. Unless noted otherwise
29a439fe51SSam Ravnborg  * all bit-ops return 0 if bit was previously clear and != 0 otherwise.
30a439fe51SSam Ravnborg  */
31a439fe51SSam Ravnborg static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *addr)
32a439fe51SSam Ravnborg {
33a439fe51SSam Ravnborg 	unsigned long *ADDR, mask;
34a439fe51SSam Ravnborg 
35a439fe51SSam Ravnborg 	ADDR = ((unsigned long *) addr) + (nr >> 5);
36a439fe51SSam Ravnborg 	mask = 1 << (nr & 31);
37a439fe51SSam Ravnborg 
38a439fe51SSam Ravnborg 	return ___set_bit(ADDR, mask) != 0;
39a439fe51SSam Ravnborg }
40a439fe51SSam Ravnborg 
41a439fe51SSam Ravnborg static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
42a439fe51SSam Ravnborg {
43a439fe51SSam Ravnborg 	unsigned long *ADDR, mask;
44a439fe51SSam Ravnborg 
45a439fe51SSam Ravnborg 	ADDR = ((unsigned long *) addr) + (nr >> 5);
46a439fe51SSam Ravnborg 	mask = 1 << (nr & 31);
47a439fe51SSam Ravnborg 
48a439fe51SSam Ravnborg 	(void) ___set_bit(ADDR, mask);
49a439fe51SSam Ravnborg }
50a439fe51SSam Ravnborg 
51a439fe51SSam Ravnborg static inline int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr)
52a439fe51SSam Ravnborg {
53a439fe51SSam Ravnborg 	unsigned long *ADDR, mask;
54a439fe51SSam Ravnborg 
55a439fe51SSam Ravnborg 	ADDR = ((unsigned long *) addr) + (nr >> 5);
56a439fe51SSam Ravnborg 	mask = 1 << (nr & 31);
57a439fe51SSam Ravnborg 
58a439fe51SSam Ravnborg 	return ___clear_bit(ADDR, mask) != 0;
59a439fe51SSam Ravnborg }
60a439fe51SSam Ravnborg 
61a439fe51SSam Ravnborg static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
62a439fe51SSam Ravnborg {
63a439fe51SSam Ravnborg 	unsigned long *ADDR, mask;
64a439fe51SSam Ravnborg 
65a439fe51SSam Ravnborg 	ADDR = ((unsigned long *) addr) + (nr >> 5);
66a439fe51SSam Ravnborg 	mask = 1 << (nr & 31);
67a439fe51SSam Ravnborg 
68a439fe51SSam Ravnborg 	(void) ___clear_bit(ADDR, mask);
69a439fe51SSam Ravnborg }
70a439fe51SSam Ravnborg 
71a439fe51SSam Ravnborg static inline int test_and_change_bit(unsigned long nr, volatile unsigned long *addr)
72a439fe51SSam Ravnborg {
73a439fe51SSam Ravnborg 	unsigned long *ADDR, mask;
74a439fe51SSam Ravnborg 
75a439fe51SSam Ravnborg 	ADDR = ((unsigned long *) addr) + (nr >> 5);
76a439fe51SSam Ravnborg 	mask = 1 << (nr & 31);
77a439fe51SSam Ravnborg 
78a439fe51SSam Ravnborg 	return ___change_bit(ADDR, mask) != 0;
79a439fe51SSam Ravnborg }
80a439fe51SSam Ravnborg 
81a439fe51SSam Ravnborg static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
82a439fe51SSam Ravnborg {
83a439fe51SSam Ravnborg 	unsigned long *ADDR, mask;
84a439fe51SSam Ravnborg 
85a439fe51SSam Ravnborg 	ADDR = ((unsigned long *) addr) + (nr >> 5);
86a439fe51SSam Ravnborg 	mask = 1 << (nr & 31);
87a439fe51SSam Ravnborg 
88a439fe51SSam Ravnborg 	(void) ___change_bit(ADDR, mask);
89a439fe51SSam Ravnborg }
90a439fe51SSam Ravnborg 
91a439fe51SSam Ravnborg #include <asm-generic/bitops/non-atomic.h>
92a439fe51SSam Ravnborg 
93a439fe51SSam Ravnborg #define smp_mb__before_clear_bit()	do { } while(0)
94a439fe51SSam Ravnborg #define smp_mb__after_clear_bit()	do { } while(0)
95a439fe51SSam Ravnborg 
96a439fe51SSam Ravnborg #include <asm-generic/bitops/ffz.h>
97a439fe51SSam Ravnborg #include <asm-generic/bitops/__ffs.h>
98a439fe51SSam Ravnborg #include <asm-generic/bitops/sched.h>
99a439fe51SSam Ravnborg #include <asm-generic/bitops/ffs.h>
100a439fe51SSam Ravnborg #include <asm-generic/bitops/fls.h>
101*e8e8e80eSRusty Russell #include <asm-generic/bitops/__fls.h>
102a439fe51SSam Ravnborg #include <asm-generic/bitops/fls64.h>
103a439fe51SSam Ravnborg #include <asm-generic/bitops/hweight.h>
104a439fe51SSam Ravnborg #include <asm-generic/bitops/lock.h>
105a439fe51SSam Ravnborg #include <asm-generic/bitops/find.h>
106a439fe51SSam Ravnborg #include <asm-generic/bitops/ext2-non-atomic.h>
107a439fe51SSam Ravnborg #include <asm-generic/bitops/ext2-atomic.h>
108a439fe51SSam Ravnborg #include <asm-generic/bitops/minix.h>
109a439fe51SSam Ravnborg 
110a439fe51SSam Ravnborg #endif /* __KERNEL__ */
111a439fe51SSam Ravnborg 
112a439fe51SSam Ravnborg #endif /* defined(_SPARC_BITOPS_H) */
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