diff options
author | Stephen Rothwell <sfr@canb.auug.org.au> | 2008-08-01 01:20:30 -0400 |
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committer | Paul Mackerras <paulus@samba.org> | 2008-08-03 22:02:00 -0400 |
commit | b8b572e1015f81b4e748417be2629dfe51ab99f9 (patch) | |
tree | 7df58667d5ed71d6c8f8f4ce40ca16b6fb776d0b /include/asm-powerpc/local.h | |
parent | 2b12a4c524812fb3f6ee590a02e65b95c8c32229 (diff) |
powerpc: Move include files to arch/powerpc/include/asm
from include/asm-powerpc. This is the result of a
mkdir arch/powerpc/include/asm
git mv include/asm-powerpc/* arch/powerpc/include/asm
Followed by a few documentation/comment fixups and a couple of places
where <asm-powepc/...> was being used explicitly. Of the latter only
one was outside the arch code and it is a driver only built for powerpc.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc/local.h')
-rw-r--r-- | include/asm-powerpc/local.h | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/include/asm-powerpc/local.h b/include/asm-powerpc/local.h deleted file mode 100644 index 612d83276653..000000000000 --- a/include/asm-powerpc/local.h +++ /dev/null | |||
@@ -1,200 +0,0 @@ | |||
1 | #ifndef _ARCH_POWERPC_LOCAL_H | ||
2 | #define _ARCH_POWERPC_LOCAL_H | ||
3 | |||
4 | #include <linux/percpu.h> | ||
5 | #include <asm/atomic.h> | ||
6 | |||
7 | typedef struct | ||
8 | { | ||
9 | atomic_long_t a; | ||
10 | } local_t; | ||
11 | |||
12 | #define LOCAL_INIT(i) { ATOMIC_LONG_INIT(i) } | ||
13 | |||
14 | #define local_read(l) atomic_long_read(&(l)->a) | ||
15 | #define local_set(l,i) atomic_long_set(&(l)->a, (i)) | ||
16 | |||
17 | #define local_add(i,l) atomic_long_add((i),(&(l)->a)) | ||
18 | #define local_sub(i,l) atomic_long_sub((i),(&(l)->a)) | ||
19 | #define local_inc(l) atomic_long_inc(&(l)->a) | ||
20 | #define local_dec(l) atomic_long_dec(&(l)->a) | ||
21 | |||
22 | static __inline__ long local_add_return(long a, local_t *l) | ||
23 | { | ||
24 | long t; | ||
25 | |||
26 | __asm__ __volatile__( | ||
27 | "1:" PPC_LLARX "%0,0,%2 # local_add_return\n\ | ||
28 | add %0,%1,%0\n" | ||
29 | PPC405_ERR77(0,%2) | ||
30 | PPC_STLCX "%0,0,%2 \n\ | ||
31 | bne- 1b" | ||
32 | : "=&r" (t) | ||
33 | : "r" (a), "r" (&(l->a.counter)) | ||
34 | : "cc", "memory"); | ||
35 | |||
36 | return t; | ||
37 | } | ||
38 | |||
39 | #define local_add_negative(a, l) (local_add_return((a), (l)) < 0) | ||
40 | |||
41 | static __inline__ long local_sub_return(long a, local_t *l) | ||
42 | { | ||
43 | long t; | ||
44 | |||
45 | __asm__ __volatile__( | ||
46 | "1:" PPC_LLARX "%0,0,%2 # local_sub_return\n\ | ||
47 | subf %0,%1,%0\n" | ||
48 | PPC405_ERR77(0,%2) | ||
49 | PPC_STLCX "%0,0,%2 \n\ | ||
50 | bne- 1b" | ||
51 | : "=&r" (t) | ||
52 | : "r" (a), "r" (&(l->a.counter)) | ||
53 | : "cc", "memory"); | ||
54 | |||
55 | return t; | ||
56 | } | ||
57 | |||
58 | static __inline__ long local_inc_return(local_t *l) | ||
59 | { | ||
60 | long t; | ||
61 | |||
62 | __asm__ __volatile__( | ||
63 | "1:" PPC_LLARX "%0,0,%1 # local_inc_return\n\ | ||
64 | addic %0,%0,1\n" | ||
65 | PPC405_ERR77(0,%1) | ||
66 | PPC_STLCX "%0,0,%1 \n\ | ||
67 | bne- 1b" | ||
68 | : "=&r" (t) | ||
69 | : "r" (&(l->a.counter)) | ||
70 | : "cc", "memory"); | ||
71 | |||
72 | return t; | ||
73 | } | ||
74 | |||
75 | /* | ||
76 | * local_inc_and_test - increment and test | ||
77 | * @l: pointer of type local_t | ||
78 | * | ||
79 | * Atomically increments @l by 1 | ||
80 | * and returns true if the result is zero, or false for all | ||
81 | * other cases. | ||
82 | */ | ||
83 | #define local_inc_and_test(l) (local_inc_return(l) == 0) | ||
84 | |||
85 | static __inline__ long local_dec_return(local_t *l) | ||
86 | { | ||
87 | long t; | ||
88 | |||
89 | __asm__ __volatile__( | ||
90 | "1:" PPC_LLARX "%0,0,%1 # local_dec_return\n\ | ||
91 | addic %0,%0,-1\n" | ||
92 | PPC405_ERR77(0,%1) | ||
93 | PPC_STLCX "%0,0,%1\n\ | ||
94 | bne- 1b" | ||
95 | : "=&r" (t) | ||
96 | : "r" (&(l->a.counter)) | ||
97 | : "cc", "memory"); | ||
98 | |||
99 | return t; | ||
100 | } | ||
101 | |||
102 | #define local_cmpxchg(l, o, n) \ | ||
103 | (cmpxchg_local(&((l)->a.counter), (o), (n))) | ||
104 | #define local_xchg(l, n) (xchg_local(&((l)->a.counter), (n))) | ||
105 | |||
106 | /** | ||
107 | * local_add_unless - add unless the number is a given value | ||
108 | * @l: pointer of type local_t | ||
109 | * @a: the amount to add to v... | ||
110 | * @u: ...unless v is equal to u. | ||
111 | * | ||
112 | * Atomically adds @a to @l, so long as it was not @u. | ||
113 | * Returns non-zero if @l was not @u, and zero otherwise. | ||
114 | */ | ||
115 | static __inline__ int local_add_unless(local_t *l, long a, long u) | ||
116 | { | ||
117 | long t; | ||
118 | |||
119 | __asm__ __volatile__ ( | ||
120 | "1:" PPC_LLARX "%0,0,%1 # local_add_unless\n\ | ||
121 | cmpw 0,%0,%3 \n\ | ||
122 | beq- 2f \n\ | ||
123 | add %0,%2,%0 \n" | ||
124 | PPC405_ERR77(0,%2) | ||
125 | PPC_STLCX "%0,0,%1 \n\ | ||
126 | bne- 1b \n" | ||
127 | " subf %0,%2,%0 \n\ | ||
128 | 2:" | ||
129 | : "=&r" (t) | ||
130 | : "r" (&(l->a.counter)), "r" (a), "r" (u) | ||
131 | : "cc", "memory"); | ||
132 | |||
133 | return t != u; | ||
134 | } | ||
135 | |||
136 | #define local_inc_not_zero(l) local_add_unless((l), 1, 0) | ||
137 | |||
138 | #define local_sub_and_test(a, l) (local_sub_return((a), (l)) == 0) | ||
139 | #define local_dec_and_test(l) (local_dec_return((l)) == 0) | ||
140 | |||
141 | /* | ||
142 | * Atomically test *l and decrement if it is greater than 0. | ||
143 | * The function returns the old value of *l minus 1. | ||
144 | */ | ||
145 | static __inline__ long local_dec_if_positive(local_t *l) | ||
146 | { | ||
147 | long t; | ||
148 | |||
149 | __asm__ __volatile__( | ||
150 | "1:" PPC_LLARX "%0,0,%1 # local_dec_if_positive\n\ | ||
151 | cmpwi %0,1\n\ | ||
152 | addi %0,%0,-1\n\ | ||
153 | blt- 2f\n" | ||
154 | PPC405_ERR77(0,%1) | ||
155 | PPC_STLCX "%0,0,%1\n\ | ||
156 | bne- 1b" | ||
157 | "\n\ | ||
158 | 2:" : "=&b" (t) | ||
159 | : "r" (&(l->a.counter)) | ||
160 | : "cc", "memory"); | ||
161 | |||
162 | return t; | ||
163 | } | ||
164 | |||
165 | /* Use these for per-cpu local_t variables: on some archs they are | ||
166 | * much more efficient than these naive implementations. Note they take | ||
167 | * a variable, not an address. | ||
168 | */ | ||
169 | |||
170 | #define __local_inc(l) ((l)->a.counter++) | ||
171 | #define __local_dec(l) ((l)->a.counter++) | ||
172 | #define __local_add(i,l) ((l)->a.counter+=(i)) | ||
173 | #define __local_sub(i,l) ((l)->a.counter-=(i)) | ||
174 | |||
175 | /* Need to disable preemption for the cpu local counters otherwise we could | ||
176 | still access a variable of a previous CPU in a non atomic way. */ | ||
177 | #define cpu_local_wrap_v(l) \ | ||
178 | ({ local_t res__; \ | ||
179 | preempt_disable(); \ | ||
180 | res__ = (l); \ | ||
181 | preempt_enable(); \ | ||
182 | res__; }) | ||
183 | #define cpu_local_wrap(l) \ | ||
184 | ({ preempt_disable(); \ | ||
185 | l; \ | ||
186 | preempt_enable(); }) \ | ||
187 | |||
188 | #define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l))) | ||
189 | #define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i))) | ||
190 | #define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l))) | ||
191 | #define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l))) | ||
192 | #define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l))) | ||
193 | #define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l))) | ||
194 | |||
195 | #define __cpu_local_inc(l) cpu_local_inc(l) | ||
196 | #define __cpu_local_dec(l) cpu_local_dec(l) | ||
197 | #define __cpu_local_add(i, l) cpu_local_add((i), (l)) | ||
198 | #define __cpu_local_sub(i, l) cpu_local_sub((i), (l)) | ||
199 | |||
200 | #endif /* _ARCH_POWERPC_LOCAL_H */ | ||