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Diffstat (limited to 'include/asm-cris/bitops.h')
-rw-r--r-- | include/asm-cris/bitops.h | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/include/asm-cris/bitops.h b/include/asm-cris/bitops.h deleted file mode 100644 index 75ea6e096483..000000000000 --- a/include/asm-cris/bitops.h +++ /dev/null | |||
@@ -1,166 +0,0 @@ | |||
1 | /* asm/bitops.h for Linux/CRIS | ||
2 | * | ||
3 | * TODO: asm versions if speed is needed | ||
4 | * | ||
5 | * All bit operations return 0 if the bit was cleared before the | ||
6 | * operation and != 0 if it was not. | ||
7 | * | ||
8 | * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1). | ||
9 | */ | ||
10 | |||
11 | #ifndef _CRIS_BITOPS_H | ||
12 | #define _CRIS_BITOPS_H | ||
13 | |||
14 | /* Currently this is unsuitable for consumption outside the kernel. */ | ||
15 | #ifdef __KERNEL__ | ||
16 | |||
17 | #ifndef _LINUX_BITOPS_H | ||
18 | #error only <linux/bitops.h> can be included directly | ||
19 | #endif | ||
20 | |||
21 | #include <asm/arch/bitops.h> | ||
22 | #include <asm/system.h> | ||
23 | #include <asm/atomic.h> | ||
24 | #include <linux/compiler.h> | ||
25 | |||
26 | /* | ||
27 | * set_bit - Atomically set a bit in memory | ||
28 | * @nr: the bit to set | ||
29 | * @addr: the address to start counting from | ||
30 | * | ||
31 | * This function is atomic and may not be reordered. See __set_bit() | ||
32 | * if you do not require the atomic guarantees. | ||
33 | * Note that @nr may be almost arbitrarily large; this function is not | ||
34 | * restricted to acting on a single-word quantity. | ||
35 | */ | ||
36 | |||
37 | #define set_bit(nr, addr) (void)test_and_set_bit(nr, addr) | ||
38 | |||
39 | /* | ||
40 | * clear_bit - Clears a bit in memory | ||
41 | * @nr: Bit to clear | ||
42 | * @addr: Address to start counting from | ||
43 | * | ||
44 | * clear_bit() is atomic and may not be reordered. However, it does | ||
45 | * not contain a memory barrier, so if it is used for locking purposes, | ||
46 | * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit() | ||
47 | * in order to ensure changes are visible on other processors. | ||
48 | */ | ||
49 | |||
50 | #define clear_bit(nr, addr) (void)test_and_clear_bit(nr, addr) | ||
51 | |||
52 | /* | ||
53 | * change_bit - Toggle a bit in memory | ||
54 | * @nr: Bit to change | ||
55 | * @addr: Address to start counting from | ||
56 | * | ||
57 | * change_bit() is atomic and may not be reordered. | ||
58 | * Note that @nr may be almost arbitrarily large; this function is not | ||
59 | * restricted to acting on a single-word quantity. | ||
60 | */ | ||
61 | |||
62 | #define change_bit(nr, addr) (void)test_and_change_bit(nr, addr) | ||
63 | |||
64 | /** | ||
65 | * test_and_set_bit - Set a bit and return its old value | ||
66 | * @nr: Bit to set | ||
67 | * @addr: Address to count from | ||
68 | * | ||
69 | * This operation is atomic and cannot be reordered. | ||
70 | * It also implies a memory barrier. | ||
71 | */ | ||
72 | |||
73 | static inline int test_and_set_bit(int nr, volatile unsigned long *addr) | ||
74 | { | ||
75 | unsigned int mask, retval; | ||
76 | unsigned long flags; | ||
77 | unsigned int *adr = (unsigned int *)addr; | ||
78 | |||
79 | adr += nr >> 5; | ||
80 | mask = 1 << (nr & 0x1f); | ||
81 | cris_atomic_save(addr, flags); | ||
82 | retval = (mask & *adr) != 0; | ||
83 | *adr |= mask; | ||
84 | cris_atomic_restore(addr, flags); | ||
85 | return retval; | ||
86 | } | ||
87 | |||
88 | /* | ||
89 | * clear_bit() doesn't provide any barrier for the compiler. | ||
90 | */ | ||
91 | #define smp_mb__before_clear_bit() barrier() | ||
92 | #define smp_mb__after_clear_bit() barrier() | ||
93 | |||
94 | /** | ||
95 | * test_and_clear_bit - Clear a bit and return its old value | ||
96 | * @nr: Bit to clear | ||
97 | * @addr: Address to count from | ||
98 | * | ||
99 | * This operation is atomic and cannot be reordered. | ||
100 | * It also implies a memory barrier. | ||
101 | */ | ||
102 | |||
103 | static inline int test_and_clear_bit(int nr, volatile unsigned long *addr) | ||
104 | { | ||
105 | unsigned int mask, retval; | ||
106 | unsigned long flags; | ||
107 | unsigned int *adr = (unsigned int *)addr; | ||
108 | |||
109 | adr += nr >> 5; | ||
110 | mask = 1 << (nr & 0x1f); | ||
111 | cris_atomic_save(addr, flags); | ||
112 | retval = (mask & *adr) != 0; | ||
113 | *adr &= ~mask; | ||
114 | cris_atomic_restore(addr, flags); | ||
115 | return retval; | ||
116 | } | ||
117 | |||
118 | /** | ||
119 | * test_and_change_bit - Change a bit and return its old value | ||
120 | * @nr: Bit to change | ||
121 | * @addr: Address to count from | ||
122 | * | ||
123 | * This operation is atomic and cannot be reordered. | ||
124 | * It also implies a memory barrier. | ||
125 | */ | ||
126 | |||
127 | static inline int test_and_change_bit(int nr, volatile unsigned long *addr) | ||
128 | { | ||
129 | unsigned int mask, retval; | ||
130 | unsigned long flags; | ||
131 | unsigned int *adr = (unsigned int *)addr; | ||
132 | adr += nr >> 5; | ||
133 | mask = 1 << (nr & 0x1f); | ||
134 | cris_atomic_save(addr, flags); | ||
135 | retval = (mask & *adr) != 0; | ||
136 | *adr ^= mask; | ||
137 | cris_atomic_restore(addr, flags); | ||
138 | return retval; | ||
139 | } | ||
140 | |||
141 | #include <asm-generic/bitops/non-atomic.h> | ||
142 | |||
143 | /* | ||
144 | * Since we define it "external", it collides with the built-in | ||
145 | * definition, which doesn't have the same semantics. We don't want to | ||
146 | * use -fno-builtin, so just hide the name ffs. | ||
147 | */ | ||
148 | #define ffs kernel_ffs | ||
149 | |||
150 | #include <asm-generic/bitops/fls.h> | ||
151 | #include <asm-generic/bitops/fls64.h> | ||
152 | #include <asm-generic/bitops/hweight.h> | ||
153 | #include <asm-generic/bitops/find.h> | ||
154 | #include <asm-generic/bitops/lock.h> | ||
155 | |||
156 | #include <asm-generic/bitops/ext2-non-atomic.h> | ||
157 | |||
158 | #define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a) | ||
159 | #define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a) | ||
160 | |||
161 | #include <asm-generic/bitops/minix.h> | ||
162 | #include <asm-generic/bitops/sched.h> | ||
163 | |||
164 | #endif /* __KERNEL__ */ | ||
165 | |||
166 | #endif /* _CRIS_BITOPS_H */ | ||