1 /*
2 * Copyright 2004-2009 Analog Devices Inc.
3 *
4 * Licensed under the GPL-2 or later.
5 */
6
7 #ifndef _BLACKFIN_BITOPS_H
8 #define _BLACKFIN_BITOPS_H
9
10 #include <linux/compiler.h>
11
12 #include <asm-generic/bitops/__ffs.h>
13 #include <asm-generic/bitops/ffz.h>
14 #include <asm-generic/bitops/fls.h>
15 #include <asm-generic/bitops/__fls.h>
16 #include <asm-generic/bitops/fls64.h>
17 #include <asm-generic/bitops/find.h>
18
19 #ifndef _LINUX_BITOPS_H
20 #error only <linux/bitops.h> can be included directly
21 #endif
22
23 #include <asm-generic/bitops/sched.h>
24 #include <asm-generic/bitops/ffs.h>
25 #include <asm-generic/bitops/const_hweight.h>
26 #include <asm-generic/bitops/lock.h>
27
28 #include <asm-generic/bitops/ext2-atomic.h>
29
30 #ifndef CONFIG_SMP
31 #include <linux/irqflags.h>
32
33 /*
34 * clear_bit may not imply a memory barrier
35 */
36 #ifndef smp_mb__before_clear_bit
37 #define smp_mb__before_clear_bit() smp_mb()
38 #define smp_mb__after_clear_bit() smp_mb()
39 #endif
40 #include <asm-generic/bitops/atomic.h>
41 #include <asm-generic/bitops/non-atomic.h>
42 #else
43
44 #include <asm/byteorder.h> /* swab32 */
45 #include <linux/linkage.h>
46
47 asmlinkage int __raw_bit_set_asm(volatile unsigned long *addr, int nr);
48
49 asmlinkage int __raw_bit_clear_asm(volatile unsigned long *addr, int nr);
50
51 asmlinkage int __raw_bit_toggle_asm(volatile unsigned long *addr, int nr);
52
53 asmlinkage int __raw_bit_test_set_asm(volatile unsigned long *addr, int nr);
54
55 asmlinkage int __raw_bit_test_clear_asm(volatile unsigned long *addr, int nr);
56
57 asmlinkage int __raw_bit_test_toggle_asm(volatile unsigned long *addr, int nr);
58
59 asmlinkage int __raw_bit_test_asm(const volatile unsigned long *addr, int nr);
60
set_bit(int nr,volatile unsigned long * addr)61 static inline void set_bit(int nr, volatile unsigned long *addr)
62 {
63 volatile unsigned long *a = addr + (nr >> 5);
64 __raw_bit_set_asm(a, nr & 0x1f);
65 }
66
clear_bit(int nr,volatile unsigned long * addr)67 static inline void clear_bit(int nr, volatile unsigned long *addr)
68 {
69 volatile unsigned long *a = addr + (nr >> 5);
70 __raw_bit_clear_asm(a, nr & 0x1f);
71 }
72
change_bit(int nr,volatile unsigned long * addr)73 static inline void change_bit(int nr, volatile unsigned long *addr)
74 {
75 volatile unsigned long *a = addr + (nr >> 5);
76 __raw_bit_toggle_asm(a, nr & 0x1f);
77 }
78
test_bit(int nr,const volatile unsigned long * addr)79 static inline int test_bit(int nr, const volatile unsigned long *addr)
80 {
81 volatile const unsigned long *a = addr + (nr >> 5);
82 return __raw_bit_test_asm(a, nr & 0x1f) != 0;
83 }
84
test_and_set_bit(int nr,volatile unsigned long * addr)85 static inline int test_and_set_bit(int nr, volatile unsigned long *addr)
86 {
87 volatile unsigned long *a = addr + (nr >> 5);
88 return __raw_bit_test_set_asm(a, nr & 0x1f);
89 }
90
test_and_clear_bit(int nr,volatile unsigned long * addr)91 static inline int test_and_clear_bit(int nr, volatile unsigned long *addr)
92 {
93 volatile unsigned long *a = addr + (nr >> 5);
94 return __raw_bit_test_clear_asm(a, nr & 0x1f);
95 }
96
test_and_change_bit(int nr,volatile unsigned long * addr)97 static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
98 {
99 volatile unsigned long *a = addr + (nr >> 5);
100 return __raw_bit_test_toggle_asm(a, nr & 0x1f);
101 }
102
103 /*
104 * clear_bit() doesn't provide any barrier for the compiler.
105 */
106 #define smp_mb__before_clear_bit() barrier()
107 #define smp_mb__after_clear_bit() barrier()
108
109 #define test_bit __skip_test_bit
110 #include <asm-generic/bitops/non-atomic.h>
111 #undef test_bit
112
113 #endif /* CONFIG_SMP */
114
115 /* Needs to be after test_bit and friends */
116 #include <asm-generic/bitops/le.h>
117
118 /*
119 * hweightN: returns the hamming weight (i.e. the number
120 * of bits set) of a N-bit word
121 */
122
__arch_hweight32(unsigned int w)123 static inline unsigned int __arch_hweight32(unsigned int w)
124 {
125 unsigned int res;
126
127 __asm__ ("%0.l = ONES %1;"
128 "%0 = %0.l (Z);"
129 : "=d" (res) : "d" (w));
130 return res;
131 }
132
__arch_hweight64(__u64 w)133 static inline unsigned int __arch_hweight64(__u64 w)
134 {
135 return __arch_hweight32((unsigned int)(w >> 32)) +
136 __arch_hweight32((unsigned int)w);
137 }
138
__arch_hweight16(unsigned int w)139 static inline unsigned int __arch_hweight16(unsigned int w)
140 {
141 return __arch_hweight32(w & 0xffff);
142 }
143
__arch_hweight8(unsigned int w)144 static inline unsigned int __arch_hweight8(unsigned int w)
145 {
146 return __arch_hweight32(w & 0xff);
147 }
148
149 #endif /* _BLACKFIN_BITOPS_H */
150