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 #include <asm/barrier.h>
31
32 #ifndef CONFIG_SMP
33 #include <linux/irqflags.h>
34 /*
35 * clear_bit may not imply a memory barrier
36 */
37 #include <asm-generic/bitops/atomic.h>
38 #include <asm-generic/bitops/non-atomic.h>
39 #else
40
41 #include <asm/byteorder.h> /* swab32 */
42 #include <linux/linkage.h>
43
44 asmlinkage int __raw_bit_set_asm(volatile unsigned long *addr, int nr);
45
46 asmlinkage int __raw_bit_clear_asm(volatile unsigned long *addr, int nr);
47
48 asmlinkage int __raw_bit_toggle_asm(volatile unsigned long *addr, int nr);
49
50 asmlinkage int __raw_bit_test_set_asm(volatile unsigned long *addr, int nr);
51
52 asmlinkage int __raw_bit_test_clear_asm(volatile unsigned long *addr, int nr);
53
54 asmlinkage int __raw_bit_test_toggle_asm(volatile unsigned long *addr, int nr);
55
56 asmlinkage int __raw_bit_test_asm(const volatile unsigned long *addr, int nr);
57
set_bit(int nr,volatile unsigned long * addr)58 static inline void set_bit(int nr, volatile unsigned long *addr)
59 {
60 volatile unsigned long *a = addr + (nr >> 5);
61 __raw_bit_set_asm(a, nr & 0x1f);
62 }
63
clear_bit(int nr,volatile unsigned long * addr)64 static inline void clear_bit(int nr, volatile unsigned long *addr)
65 {
66 volatile unsigned long *a = addr + (nr >> 5);
67 __raw_bit_clear_asm(a, nr & 0x1f);
68 }
69
change_bit(int nr,volatile unsigned long * addr)70 static inline void change_bit(int nr, volatile unsigned long *addr)
71 {
72 volatile unsigned long *a = addr + (nr >> 5);
73 __raw_bit_toggle_asm(a, nr & 0x1f);
74 }
75
test_bit(int nr,const volatile unsigned long * addr)76 static inline int test_bit(int nr, const volatile unsigned long *addr)
77 {
78 volatile const unsigned long *a = addr + (nr >> 5);
79 return __raw_bit_test_asm(a, nr & 0x1f) != 0;
80 }
81
test_and_set_bit(int nr,volatile unsigned long * addr)82 static inline int test_and_set_bit(int nr, volatile unsigned long *addr)
83 {
84 volatile unsigned long *a = addr + (nr >> 5);
85 return __raw_bit_test_set_asm(a, nr & 0x1f);
86 }
87
test_and_clear_bit(int nr,volatile unsigned long * addr)88 static inline int test_and_clear_bit(int nr, volatile unsigned long *addr)
89 {
90 volatile unsigned long *a = addr + (nr >> 5);
91 return __raw_bit_test_clear_asm(a, nr & 0x1f);
92 }
93
test_and_change_bit(int nr,volatile unsigned long * addr)94 static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
95 {
96 volatile unsigned long *a = addr + (nr >> 5);
97 return __raw_bit_test_toggle_asm(a, nr & 0x1f);
98 }
99
100 #define test_bit __skip_test_bit
101 #include <asm-generic/bitops/non-atomic.h>
102 #undef test_bit
103
104 #endif /* CONFIG_SMP */
105
106 /* Needs to be after test_bit and friends */
107 #include <asm-generic/bitops/le.h>
108
109 /*
110 * hweightN: returns the hamming weight (i.e. the number
111 * of bits set) of a N-bit word
112 */
113
__arch_hweight32(unsigned int w)114 static inline unsigned int __arch_hweight32(unsigned int w)
115 {
116 unsigned int res;
117
118 __asm__ ("%0.l = ONES %1;"
119 "%0 = %0.l (Z);"
120 : "=d" (res) : "d" (w));
121 return res;
122 }
123
__arch_hweight64(__u64 w)124 static inline unsigned int __arch_hweight64(__u64 w)
125 {
126 return __arch_hweight32((unsigned int)(w >> 32)) +
127 __arch_hweight32((unsigned int)w);
128 }
129
__arch_hweight16(unsigned int w)130 static inline unsigned int __arch_hweight16(unsigned int w)
131 {
132 return __arch_hweight32(w & 0xffff);
133 }
134
__arch_hweight8(unsigned int w)135 static inline unsigned int __arch_hweight8(unsigned int w)
136 {
137 return __arch_hweight32(w & 0xff);
138 }
139
140 #endif /* _BLACKFIN_BITOPS_H */
141