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1da177e4 LT |
1 | #ifndef _ASM_GENERIC_PERCPU_H_ |
2 | #define _ASM_GENERIC_PERCPU_H_ | |
5028eaa9 | 3 | |
1da177e4 | 4 | #include <linux/compiler.h> |
ae1ee11b | 5 | #include <linux/threads.h> |
5028eaa9 | 6 | #include <linux/percpu-defs.h> |
acdac872 | 7 | |
1da177e4 LT |
8 | #ifdef CONFIG_SMP |
9 | ||
acdac872 | 10 | /* |
11 | * per_cpu_offset() is the offset that has to be added to a | |
12 | * percpu variable to get to the instance for a certain processor. | |
13 | * | |
14 | * Most arches use the __per_cpu_offset array for those offsets but | |
15 | * some arches have their own ways of determining the offset (x86_64, s390). | |
16 | */ | |
17 | #ifndef __per_cpu_offset | |
1da177e4 LT |
18 | extern unsigned long __per_cpu_offset[NR_CPUS]; |
19 | ||
a875a69f | 20 | #define per_cpu_offset(x) (__per_cpu_offset[x]) |
acdac872 | 21 | #endif |
22 | ||
23 | /* | |
24 | * Determine the offset for the currently active processor. | |
25 | * An arch may define __my_cpu_offset to provide a more effective | |
26 | * means of obtaining the offset to the per cpu variables of the | |
27 | * current processor. | |
28 | */ | |
29 | #ifndef __my_cpu_offset | |
30 | #define __my_cpu_offset per_cpu_offset(raw_smp_processor_id()) | |
1e835278 HD |
31 | #endif |
32 | #ifdef CONFIG_DEBUG_PREEMPT | |
acdac872 | 33 | #define my_cpu_offset per_cpu_offset(smp_processor_id()) |
34 | #else | |
35 | #define my_cpu_offset __my_cpu_offset | |
36 | #endif | |
37 | ||
bbc344e1 TH |
38 | /* |
39 | * Arch may define arch_raw_cpu_ptr() to provide more efficient address | |
40 | * translations for raw_cpu_ptr(). | |
41 | */ | |
42 | #ifndef arch_raw_cpu_ptr | |
43 | #define arch_raw_cpu_ptr(ptr) SHIFT_PERCPU_PTR(ptr, __my_cpu_offset) | |
db7829c6 | 44 | #endif |
bbc344e1 | 45 | |
dd5af90a | 46 | #ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA |
acdac872 | 47 | extern void setup_per_cpu_areas(void); |
48 | #endif | |
1da177e4 | 49 | |
1da177e4 LT |
50 | #endif /* SMP */ |
51 | ||
9b8de747 DH |
52 | #ifndef PER_CPU_BASE_SECTION |
53 | #ifdef CONFIG_SMP | |
3d9a854c | 54 | #define PER_CPU_BASE_SECTION ".data..percpu" |
9b8de747 DH |
55 | #else |
56 | #define PER_CPU_BASE_SECTION ".data" | |
57 | #endif | |
58 | #endif | |
59 | ||
acdac872 | 60 | #ifndef PER_CPU_ATTRIBUTES |
61 | #define PER_CPU_ATTRIBUTES | |
62 | #endif | |
63 | ||
b01e8dc3 TH |
64 | #ifndef PER_CPU_DEF_ATTRIBUTES |
65 | #define PER_CPU_DEF_ATTRIBUTES | |
66 | #endif | |
67 | ||
9c28278a TH |
68 | #define raw_cpu_generic_to_op(pcp, val, op) \ |
69 | do { \ | |
70 | *raw_cpu_ptr(&(pcp)) op val; \ | |
71 | } while (0) | |
72 | ||
73 | #define raw_cpu_generic_add_return(pcp, val) \ | |
74 | ({ \ | |
75 | raw_cpu_add(pcp, val); \ | |
76 | raw_cpu_read(pcp); \ | |
77 | }) | |
78 | ||
79 | #define raw_cpu_generic_xchg(pcp, nval) \ | |
80 | ({ typeof(pcp) ret__; \ | |
81 | ret__ = raw_cpu_read(pcp); \ | |
82 | raw_cpu_write(pcp, nval); \ | |
83 | ret__; \ | |
84 | }) | |
85 | ||
86 | #define raw_cpu_generic_cmpxchg(pcp, oval, nval) \ | |
87 | ({ \ | |
88 | typeof(pcp) ret__; \ | |
89 | ret__ = raw_cpu_read(pcp); \ | |
90 | if (ret__ == (oval)) \ | |
91 | raw_cpu_write(pcp, nval); \ | |
92 | ret__; \ | |
93 | }) | |
94 | ||
95 | #define raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
96 | ({ \ | |
97 | int __ret = 0; \ | |
98 | if (raw_cpu_read(pcp1) == (oval1) && \ | |
99 | raw_cpu_read(pcp2) == (oval2)) { \ | |
100 | raw_cpu_write(pcp1, (nval1)); \ | |
101 | raw_cpu_write(pcp2, (nval2)); \ | |
102 | __ret = 1; \ | |
103 | } \ | |
104 | (__ret); \ | |
105 | }) | |
106 | ||
107 | #define _this_cpu_generic_read(pcp) \ | |
108 | ({ typeof(pcp) ret__; \ | |
109 | preempt_disable(); \ | |
110 | ret__ = *this_cpu_ptr(&(pcp)); \ | |
111 | preempt_enable(); \ | |
112 | ret__; \ | |
113 | }) | |
114 | ||
115 | #define _this_cpu_generic_to_op(pcp, val, op) \ | |
116 | do { \ | |
117 | unsigned long flags; \ | |
118 | raw_local_irq_save(flags); \ | |
119 | *raw_cpu_ptr(&(pcp)) op val; \ | |
120 | raw_local_irq_restore(flags); \ | |
121 | } while (0) | |
122 | ||
123 | #define _this_cpu_generic_add_return(pcp, val) \ | |
124 | ({ \ | |
125 | typeof(pcp) ret__; \ | |
126 | unsigned long flags; \ | |
127 | raw_local_irq_save(flags); \ | |
128 | raw_cpu_add(pcp, val); \ | |
129 | ret__ = raw_cpu_read(pcp); \ | |
130 | raw_local_irq_restore(flags); \ | |
131 | ret__; \ | |
132 | }) | |
133 | ||
134 | #define _this_cpu_generic_xchg(pcp, nval) \ | |
135 | ({ typeof(pcp) ret__; \ | |
136 | unsigned long flags; \ | |
137 | raw_local_irq_save(flags); \ | |
138 | ret__ = raw_cpu_read(pcp); \ | |
139 | raw_cpu_write(pcp, nval); \ | |
140 | raw_local_irq_restore(flags); \ | |
141 | ret__; \ | |
142 | }) | |
143 | ||
144 | #define _this_cpu_generic_cmpxchg(pcp, oval, nval) \ | |
145 | ({ \ | |
146 | typeof(pcp) ret__; \ | |
147 | unsigned long flags; \ | |
148 | raw_local_irq_save(flags); \ | |
149 | ret__ = raw_cpu_read(pcp); \ | |
150 | if (ret__ == (oval)) \ | |
151 | raw_cpu_write(pcp, nval); \ | |
152 | raw_local_irq_restore(flags); \ | |
153 | ret__; \ | |
154 | }) | |
155 | ||
156 | #define _this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
157 | ({ \ | |
158 | int ret__; \ | |
159 | unsigned long flags; \ | |
160 | raw_local_irq_save(flags); \ | |
161 | ret__ = raw_cpu_generic_cmpxchg_double(pcp1, pcp2, \ | |
162 | oval1, oval2, nval1, nval2); \ | |
163 | raw_local_irq_restore(flags); \ | |
164 | ret__; \ | |
165 | }) | |
166 | ||
47b69ad6 TH |
167 | # ifndef raw_cpu_read_1 |
168 | # define raw_cpu_read_1(pcp) (*raw_cpu_ptr(&(pcp))) | |
169 | # endif | |
170 | # ifndef raw_cpu_read_2 | |
171 | # define raw_cpu_read_2(pcp) (*raw_cpu_ptr(&(pcp))) | |
172 | # endif | |
173 | # ifndef raw_cpu_read_4 | |
174 | # define raw_cpu_read_4(pcp) (*raw_cpu_ptr(&(pcp))) | |
175 | # endif | |
176 | # ifndef raw_cpu_read_8 | |
177 | # define raw_cpu_read_8(pcp) (*raw_cpu_ptr(&(pcp))) | |
178 | # endif | |
179 | ||
47b69ad6 TH |
180 | # ifndef raw_cpu_write_1 |
181 | # define raw_cpu_write_1(pcp, val) raw_cpu_generic_to_op((pcp), (val), =) | |
182 | # endif | |
183 | # ifndef raw_cpu_write_2 | |
184 | # define raw_cpu_write_2(pcp, val) raw_cpu_generic_to_op((pcp), (val), =) | |
185 | # endif | |
186 | # ifndef raw_cpu_write_4 | |
187 | # define raw_cpu_write_4(pcp, val) raw_cpu_generic_to_op((pcp), (val), =) | |
188 | # endif | |
189 | # ifndef raw_cpu_write_8 | |
190 | # define raw_cpu_write_8(pcp, val) raw_cpu_generic_to_op((pcp), (val), =) | |
191 | # endif | |
192 | ||
193 | # ifndef raw_cpu_add_1 | |
194 | # define raw_cpu_add_1(pcp, val) raw_cpu_generic_to_op((pcp), (val), +=) | |
195 | # endif | |
196 | # ifndef raw_cpu_add_2 | |
197 | # define raw_cpu_add_2(pcp, val) raw_cpu_generic_to_op((pcp), (val), +=) | |
198 | # endif | |
199 | # ifndef raw_cpu_add_4 | |
200 | # define raw_cpu_add_4(pcp, val) raw_cpu_generic_to_op((pcp), (val), +=) | |
201 | # endif | |
202 | # ifndef raw_cpu_add_8 | |
203 | # define raw_cpu_add_8(pcp, val) raw_cpu_generic_to_op((pcp), (val), +=) | |
204 | # endif | |
205 | ||
206 | # ifndef raw_cpu_and_1 | |
207 | # define raw_cpu_and_1(pcp, val) raw_cpu_generic_to_op((pcp), (val), &=) | |
208 | # endif | |
209 | # ifndef raw_cpu_and_2 | |
210 | # define raw_cpu_and_2(pcp, val) raw_cpu_generic_to_op((pcp), (val), &=) | |
211 | # endif | |
212 | # ifndef raw_cpu_and_4 | |
213 | # define raw_cpu_and_4(pcp, val) raw_cpu_generic_to_op((pcp), (val), &=) | |
214 | # endif | |
215 | # ifndef raw_cpu_and_8 | |
216 | # define raw_cpu_and_8(pcp, val) raw_cpu_generic_to_op((pcp), (val), &=) | |
217 | # endif | |
218 | ||
219 | # ifndef raw_cpu_or_1 | |
220 | # define raw_cpu_or_1(pcp, val) raw_cpu_generic_to_op((pcp), (val), |=) | |
221 | # endif | |
222 | # ifndef raw_cpu_or_2 | |
223 | # define raw_cpu_or_2(pcp, val) raw_cpu_generic_to_op((pcp), (val), |=) | |
224 | # endif | |
225 | # ifndef raw_cpu_or_4 | |
226 | # define raw_cpu_or_4(pcp, val) raw_cpu_generic_to_op((pcp), (val), |=) | |
227 | # endif | |
228 | # ifndef raw_cpu_or_8 | |
229 | # define raw_cpu_or_8(pcp, val) raw_cpu_generic_to_op((pcp), (val), |=) | |
230 | # endif | |
231 | ||
47b69ad6 TH |
232 | # ifndef raw_cpu_add_return_1 |
233 | # define raw_cpu_add_return_1(pcp, val) raw_cpu_generic_add_return(pcp, val) | |
234 | # endif | |
235 | # ifndef raw_cpu_add_return_2 | |
236 | # define raw_cpu_add_return_2(pcp, val) raw_cpu_generic_add_return(pcp, val) | |
237 | # endif | |
238 | # ifndef raw_cpu_add_return_4 | |
239 | # define raw_cpu_add_return_4(pcp, val) raw_cpu_generic_add_return(pcp, val) | |
240 | # endif | |
241 | # ifndef raw_cpu_add_return_8 | |
242 | # define raw_cpu_add_return_8(pcp, val) raw_cpu_generic_add_return(pcp, val) | |
243 | # endif | |
244 | ||
47b69ad6 TH |
245 | # ifndef raw_cpu_xchg_1 |
246 | # define raw_cpu_xchg_1(pcp, nval) raw_cpu_generic_xchg(pcp, nval) | |
247 | # endif | |
248 | # ifndef raw_cpu_xchg_2 | |
249 | # define raw_cpu_xchg_2(pcp, nval) raw_cpu_generic_xchg(pcp, nval) | |
250 | # endif | |
251 | # ifndef raw_cpu_xchg_4 | |
252 | # define raw_cpu_xchg_4(pcp, nval) raw_cpu_generic_xchg(pcp, nval) | |
253 | # endif | |
254 | # ifndef raw_cpu_xchg_8 | |
255 | # define raw_cpu_xchg_8(pcp, nval) raw_cpu_generic_xchg(pcp, nval) | |
256 | # endif | |
257 | ||
47b69ad6 TH |
258 | # ifndef raw_cpu_cmpxchg_1 |
259 | # define raw_cpu_cmpxchg_1(pcp, oval, nval) raw_cpu_generic_cmpxchg(pcp, oval, nval) | |
260 | # endif | |
261 | # ifndef raw_cpu_cmpxchg_2 | |
262 | # define raw_cpu_cmpxchg_2(pcp, oval, nval) raw_cpu_generic_cmpxchg(pcp, oval, nval) | |
263 | # endif | |
264 | # ifndef raw_cpu_cmpxchg_4 | |
265 | # define raw_cpu_cmpxchg_4(pcp, oval, nval) raw_cpu_generic_cmpxchg(pcp, oval, nval) | |
266 | # endif | |
267 | # ifndef raw_cpu_cmpxchg_8 | |
268 | # define raw_cpu_cmpxchg_8(pcp, oval, nval) raw_cpu_generic_cmpxchg(pcp, oval, nval) | |
269 | # endif | |
270 | ||
47b69ad6 TH |
271 | # ifndef raw_cpu_cmpxchg_double_1 |
272 | # define raw_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
273 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
274 | # endif | |
275 | # ifndef raw_cpu_cmpxchg_double_2 | |
276 | # define raw_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
277 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
278 | # endif | |
279 | # ifndef raw_cpu_cmpxchg_double_4 | |
280 | # define raw_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
281 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
282 | # endif | |
283 | # ifndef raw_cpu_cmpxchg_double_8 | |
284 | # define raw_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
285 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
286 | # endif | |
287 | ||
47b69ad6 TH |
288 | # ifndef this_cpu_read_1 |
289 | # define this_cpu_read_1(pcp) _this_cpu_generic_read(pcp) | |
290 | # endif | |
291 | # ifndef this_cpu_read_2 | |
292 | # define this_cpu_read_2(pcp) _this_cpu_generic_read(pcp) | |
293 | # endif | |
294 | # ifndef this_cpu_read_4 | |
295 | # define this_cpu_read_4(pcp) _this_cpu_generic_read(pcp) | |
296 | # endif | |
297 | # ifndef this_cpu_read_8 | |
298 | # define this_cpu_read_8(pcp) _this_cpu_generic_read(pcp) | |
299 | # endif | |
300 | ||
47b69ad6 TH |
301 | # ifndef this_cpu_write_1 |
302 | # define this_cpu_write_1(pcp, val) _this_cpu_generic_to_op((pcp), (val), =) | |
303 | # endif | |
304 | # ifndef this_cpu_write_2 | |
305 | # define this_cpu_write_2(pcp, val) _this_cpu_generic_to_op((pcp), (val), =) | |
306 | # endif | |
307 | # ifndef this_cpu_write_4 | |
308 | # define this_cpu_write_4(pcp, val) _this_cpu_generic_to_op((pcp), (val), =) | |
309 | # endif | |
310 | # ifndef this_cpu_write_8 | |
311 | # define this_cpu_write_8(pcp, val) _this_cpu_generic_to_op((pcp), (val), =) | |
312 | # endif | |
313 | ||
314 | # ifndef this_cpu_add_1 | |
315 | # define this_cpu_add_1(pcp, val) _this_cpu_generic_to_op((pcp), (val), +=) | |
316 | # endif | |
317 | # ifndef this_cpu_add_2 | |
318 | # define this_cpu_add_2(pcp, val) _this_cpu_generic_to_op((pcp), (val), +=) | |
319 | # endif | |
320 | # ifndef this_cpu_add_4 | |
321 | # define this_cpu_add_4(pcp, val) _this_cpu_generic_to_op((pcp), (val), +=) | |
322 | # endif | |
323 | # ifndef this_cpu_add_8 | |
324 | # define this_cpu_add_8(pcp, val) _this_cpu_generic_to_op((pcp), (val), +=) | |
325 | # endif | |
326 | ||
327 | # ifndef this_cpu_and_1 | |
328 | # define this_cpu_and_1(pcp, val) _this_cpu_generic_to_op((pcp), (val), &=) | |
329 | # endif | |
330 | # ifndef this_cpu_and_2 | |
331 | # define this_cpu_and_2(pcp, val) _this_cpu_generic_to_op((pcp), (val), &=) | |
332 | # endif | |
333 | # ifndef this_cpu_and_4 | |
334 | # define this_cpu_and_4(pcp, val) _this_cpu_generic_to_op((pcp), (val), &=) | |
335 | # endif | |
336 | # ifndef this_cpu_and_8 | |
337 | # define this_cpu_and_8(pcp, val) _this_cpu_generic_to_op((pcp), (val), &=) | |
338 | # endif | |
339 | ||
340 | # ifndef this_cpu_or_1 | |
341 | # define this_cpu_or_1(pcp, val) _this_cpu_generic_to_op((pcp), (val), |=) | |
342 | # endif | |
343 | # ifndef this_cpu_or_2 | |
344 | # define this_cpu_or_2(pcp, val) _this_cpu_generic_to_op((pcp), (val), |=) | |
345 | # endif | |
346 | # ifndef this_cpu_or_4 | |
347 | # define this_cpu_or_4(pcp, val) _this_cpu_generic_to_op((pcp), (val), |=) | |
348 | # endif | |
349 | # ifndef this_cpu_or_8 | |
350 | # define this_cpu_or_8(pcp, val) _this_cpu_generic_to_op((pcp), (val), |=) | |
351 | # endif | |
352 | ||
47b69ad6 TH |
353 | # ifndef this_cpu_add_return_1 |
354 | # define this_cpu_add_return_1(pcp, val) _this_cpu_generic_add_return(pcp, val) | |
355 | # endif | |
356 | # ifndef this_cpu_add_return_2 | |
357 | # define this_cpu_add_return_2(pcp, val) _this_cpu_generic_add_return(pcp, val) | |
358 | # endif | |
359 | # ifndef this_cpu_add_return_4 | |
360 | # define this_cpu_add_return_4(pcp, val) _this_cpu_generic_add_return(pcp, val) | |
361 | # endif | |
362 | # ifndef this_cpu_add_return_8 | |
363 | # define this_cpu_add_return_8(pcp, val) _this_cpu_generic_add_return(pcp, val) | |
364 | # endif | |
365 | ||
47b69ad6 TH |
366 | # ifndef this_cpu_xchg_1 |
367 | # define this_cpu_xchg_1(pcp, nval) _this_cpu_generic_xchg(pcp, nval) | |
368 | # endif | |
369 | # ifndef this_cpu_xchg_2 | |
370 | # define this_cpu_xchg_2(pcp, nval) _this_cpu_generic_xchg(pcp, nval) | |
371 | # endif | |
372 | # ifndef this_cpu_xchg_4 | |
373 | # define this_cpu_xchg_4(pcp, nval) _this_cpu_generic_xchg(pcp, nval) | |
374 | # endif | |
375 | # ifndef this_cpu_xchg_8 | |
376 | # define this_cpu_xchg_8(pcp, nval) _this_cpu_generic_xchg(pcp, nval) | |
377 | # endif | |
378 | ||
47b69ad6 TH |
379 | # ifndef this_cpu_cmpxchg_1 |
380 | # define this_cpu_cmpxchg_1(pcp, oval, nval) _this_cpu_generic_cmpxchg(pcp, oval, nval) | |
381 | # endif | |
382 | # ifndef this_cpu_cmpxchg_2 | |
383 | # define this_cpu_cmpxchg_2(pcp, oval, nval) _this_cpu_generic_cmpxchg(pcp, oval, nval) | |
384 | # endif | |
385 | # ifndef this_cpu_cmpxchg_4 | |
386 | # define this_cpu_cmpxchg_4(pcp, oval, nval) _this_cpu_generic_cmpxchg(pcp, oval, nval) | |
387 | # endif | |
388 | # ifndef this_cpu_cmpxchg_8 | |
389 | # define this_cpu_cmpxchg_8(pcp, oval, nval) _this_cpu_generic_cmpxchg(pcp, oval, nval) | |
390 | # endif | |
391 | ||
47b69ad6 TH |
392 | # ifndef this_cpu_cmpxchg_double_1 |
393 | # define this_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
394 | _this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
395 | # endif | |
396 | # ifndef this_cpu_cmpxchg_double_2 | |
397 | # define this_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
398 | _this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
399 | # endif | |
400 | # ifndef this_cpu_cmpxchg_double_4 | |
401 | # define this_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
402 | _this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
403 | # endif | |
404 | # ifndef this_cpu_cmpxchg_double_8 | |
405 | # define this_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
406 | _this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
407 | # endif | |
408 | ||
1da177e4 | 409 | #endif /* _ASM_GENERIC_PERCPU_H_ */ |