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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) \ | |
eba11788 TH |
80 | ({ \ |
81 | typeof(pcp) __ret; \ | |
82 | __ret = raw_cpu_read(pcp); \ | |
9c28278a | 83 | raw_cpu_write(pcp, nval); \ |
eba11788 | 84 | __ret; \ |
9c28278a TH |
85 | }) |
86 | ||
87 | #define raw_cpu_generic_cmpxchg(pcp, oval, nval) \ | |
88 | ({ \ | |
eba11788 TH |
89 | typeof(pcp) __ret; \ |
90 | __ret = raw_cpu_read(pcp); \ | |
91 | if (__ret == (oval)) \ | |
9c28278a | 92 | raw_cpu_write(pcp, nval); \ |
eba11788 | 93 | __ret; \ |
9c28278a TH |
94 | }) |
95 | ||
eba11788 | 96 | #define raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \ |
9c28278a TH |
97 | ({ \ |
98 | int __ret = 0; \ | |
99 | if (raw_cpu_read(pcp1) == (oval1) && \ | |
100 | raw_cpu_read(pcp2) == (oval2)) { \ | |
eba11788 TH |
101 | raw_cpu_write(pcp1, nval1); \ |
102 | raw_cpu_write(pcp2, nval2); \ | |
9c28278a TH |
103 | __ret = 1; \ |
104 | } \ | |
105 | (__ret); \ | |
106 | }) | |
107 | ||
eba11788 TH |
108 | #define this_cpu_generic_read(pcp) \ |
109 | ({ \ | |
110 | typeof(pcp) __ret; \ | |
9c28278a | 111 | preempt_disable(); \ |
eba11788 | 112 | __ret = *this_cpu_ptr(&(pcp)); \ |
9c28278a | 113 | preempt_enable(); \ |
eba11788 | 114 | __ret; \ |
9c28278a TH |
115 | }) |
116 | ||
eba11788 | 117 | #define this_cpu_generic_to_op(pcp, val, op) \ |
9c28278a | 118 | do { \ |
eba11788 TH |
119 | unsigned long __flags; \ |
120 | raw_local_irq_save(__flags); \ | |
9c28278a | 121 | *raw_cpu_ptr(&(pcp)) op val; \ |
eba11788 | 122 | raw_local_irq_restore(__flags); \ |
9c28278a TH |
123 | } while (0) |
124 | ||
eba11788 | 125 | #define this_cpu_generic_add_return(pcp, val) \ |
9c28278a | 126 | ({ \ |
eba11788 TH |
127 | typeof(pcp) __ret; \ |
128 | unsigned long __flags; \ | |
129 | raw_local_irq_save(__flags); \ | |
130 | raw_cpu_add(pcp, val); \ | |
131 | __ret = raw_cpu_read(pcp); \ | |
132 | raw_local_irq_restore(__flags); \ | |
133 | __ret; \ | |
9c28278a TH |
134 | }) |
135 | ||
eba11788 TH |
136 | #define this_cpu_generic_xchg(pcp, nval) \ |
137 | ({ \ | |
138 | typeof(pcp) __ret; \ | |
139 | unsigned long __flags; \ | |
140 | raw_local_irq_save(__flags); \ | |
141 | __ret = raw_cpu_read(pcp); \ | |
9c28278a | 142 | raw_cpu_write(pcp, nval); \ |
eba11788 TH |
143 | raw_local_irq_restore(__flags); \ |
144 | __ret; \ | |
9c28278a TH |
145 | }) |
146 | ||
eba11788 | 147 | #define this_cpu_generic_cmpxchg(pcp, oval, nval) \ |
9c28278a | 148 | ({ \ |
eba11788 TH |
149 | typeof(pcp) __ret; \ |
150 | unsigned long __flags; \ | |
151 | raw_local_irq_save(__flags); \ | |
152 | __ret = raw_cpu_read(pcp); \ | |
153 | if (__ret == (oval)) \ | |
9c28278a | 154 | raw_cpu_write(pcp, nval); \ |
eba11788 TH |
155 | raw_local_irq_restore(__flags); \ |
156 | __ret; \ | |
9c28278a TH |
157 | }) |
158 | ||
eba11788 | 159 | #define this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \ |
9c28278a | 160 | ({ \ |
eba11788 TH |
161 | int __ret; \ |
162 | unsigned long __flags; \ | |
163 | raw_local_irq_save(__flags); \ | |
164 | __ret = raw_cpu_generic_cmpxchg_double(pcp1, pcp2, \ | |
9c28278a | 165 | oval1, oval2, nval1, nval2); \ |
eba11788 TH |
166 | raw_local_irq_restore(__flags); \ |
167 | __ret; \ | |
9c28278a TH |
168 | }) |
169 | ||
eba11788 TH |
170 | #ifndef raw_cpu_read_1 |
171 | #define raw_cpu_read_1(pcp) (*raw_cpu_ptr(&(pcp))) | |
172 | #endif | |
173 | #ifndef raw_cpu_read_2 | |
174 | #define raw_cpu_read_2(pcp) (*raw_cpu_ptr(&(pcp))) | |
175 | #endif | |
176 | #ifndef raw_cpu_read_4 | |
177 | #define raw_cpu_read_4(pcp) (*raw_cpu_ptr(&(pcp))) | |
178 | #endif | |
179 | #ifndef raw_cpu_read_8 | |
180 | #define raw_cpu_read_8(pcp) (*raw_cpu_ptr(&(pcp))) | |
181 | #endif | |
182 | ||
183 | #ifndef raw_cpu_write_1 | |
184 | #define raw_cpu_write_1(pcp, val) raw_cpu_generic_to_op(pcp, val, =) | |
185 | #endif | |
186 | #ifndef raw_cpu_write_2 | |
187 | #define raw_cpu_write_2(pcp, val) raw_cpu_generic_to_op(pcp, val, =) | |
188 | #endif | |
189 | #ifndef raw_cpu_write_4 | |
190 | #define raw_cpu_write_4(pcp, val) raw_cpu_generic_to_op(pcp, val, =) | |
191 | #endif | |
192 | #ifndef raw_cpu_write_8 | |
193 | #define raw_cpu_write_8(pcp, val) raw_cpu_generic_to_op(pcp, val, =) | |
194 | #endif | |
195 | ||
196 | #ifndef raw_cpu_add_1 | |
197 | #define raw_cpu_add_1(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) | |
198 | #endif | |
199 | #ifndef raw_cpu_add_2 | |
200 | #define raw_cpu_add_2(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) | |
201 | #endif | |
202 | #ifndef raw_cpu_add_4 | |
203 | #define raw_cpu_add_4(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) | |
204 | #endif | |
205 | #ifndef raw_cpu_add_8 | |
206 | #define raw_cpu_add_8(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) | |
207 | #endif | |
208 | ||
209 | #ifndef raw_cpu_and_1 | |
210 | #define raw_cpu_and_1(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) | |
211 | #endif | |
212 | #ifndef raw_cpu_and_2 | |
213 | #define raw_cpu_and_2(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) | |
214 | #endif | |
215 | #ifndef raw_cpu_and_4 | |
216 | #define raw_cpu_and_4(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) | |
217 | #endif | |
218 | #ifndef raw_cpu_and_8 | |
219 | #define raw_cpu_and_8(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) | |
220 | #endif | |
221 | ||
222 | #ifndef raw_cpu_or_1 | |
223 | #define raw_cpu_or_1(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) | |
224 | #endif | |
225 | #ifndef raw_cpu_or_2 | |
226 | #define raw_cpu_or_2(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) | |
227 | #endif | |
228 | #ifndef raw_cpu_or_4 | |
229 | #define raw_cpu_or_4(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) | |
230 | #endif | |
231 | #ifndef raw_cpu_or_8 | |
232 | #define raw_cpu_or_8(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) | |
233 | #endif | |
234 | ||
235 | #ifndef raw_cpu_add_return_1 | |
236 | #define raw_cpu_add_return_1(pcp, val) raw_cpu_generic_add_return(pcp, val) | |
237 | #endif | |
238 | #ifndef raw_cpu_add_return_2 | |
239 | #define raw_cpu_add_return_2(pcp, val) raw_cpu_generic_add_return(pcp, val) | |
240 | #endif | |
241 | #ifndef raw_cpu_add_return_4 | |
242 | #define raw_cpu_add_return_4(pcp, val) raw_cpu_generic_add_return(pcp, val) | |
243 | #endif | |
244 | #ifndef raw_cpu_add_return_8 | |
245 | #define raw_cpu_add_return_8(pcp, val) raw_cpu_generic_add_return(pcp, val) | |
246 | #endif | |
247 | ||
248 | #ifndef raw_cpu_xchg_1 | |
249 | #define raw_cpu_xchg_1(pcp, nval) raw_cpu_generic_xchg(pcp, nval) | |
250 | #endif | |
251 | #ifndef raw_cpu_xchg_2 | |
252 | #define raw_cpu_xchg_2(pcp, nval) raw_cpu_generic_xchg(pcp, nval) | |
253 | #endif | |
254 | #ifndef raw_cpu_xchg_4 | |
255 | #define raw_cpu_xchg_4(pcp, nval) raw_cpu_generic_xchg(pcp, nval) | |
256 | #endif | |
257 | #ifndef raw_cpu_xchg_8 | |
258 | #define raw_cpu_xchg_8(pcp, nval) raw_cpu_generic_xchg(pcp, nval) | |
259 | #endif | |
260 | ||
261 | #ifndef raw_cpu_cmpxchg_1 | |
262 | #define raw_cpu_cmpxchg_1(pcp, oval, nval) \ | |
263 | raw_cpu_generic_cmpxchg(pcp, oval, nval) | |
264 | #endif | |
265 | #ifndef raw_cpu_cmpxchg_2 | |
266 | #define raw_cpu_cmpxchg_2(pcp, oval, nval) \ | |
267 | raw_cpu_generic_cmpxchg(pcp, oval, nval) | |
268 | #endif | |
269 | #ifndef raw_cpu_cmpxchg_4 | |
270 | #define raw_cpu_cmpxchg_4(pcp, oval, nval) \ | |
271 | raw_cpu_generic_cmpxchg(pcp, oval, nval) | |
272 | #endif | |
273 | #ifndef raw_cpu_cmpxchg_8 | |
274 | #define raw_cpu_cmpxchg_8(pcp, oval, nval) \ | |
275 | raw_cpu_generic_cmpxchg(pcp, oval, nval) | |
276 | #endif | |
277 | ||
278 | #ifndef raw_cpu_cmpxchg_double_1 | |
279 | #define raw_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
47b69ad6 | 280 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) |
eba11788 TH |
281 | #endif |
282 | #ifndef raw_cpu_cmpxchg_double_2 | |
283 | #define raw_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
47b69ad6 | 284 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) |
eba11788 TH |
285 | #endif |
286 | #ifndef raw_cpu_cmpxchg_double_4 | |
287 | #define raw_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
47b69ad6 | 288 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) |
eba11788 TH |
289 | #endif |
290 | #ifndef raw_cpu_cmpxchg_double_8 | |
291 | #define raw_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
47b69ad6 | 292 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) |
eba11788 TH |
293 | #endif |
294 | ||
295 | #ifndef this_cpu_read_1 | |
296 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp) | |
297 | #endif | |
298 | #ifndef this_cpu_read_2 | |
299 | #define this_cpu_read_2(pcp) this_cpu_generic_read(pcp) | |
300 | #endif | |
301 | #ifndef this_cpu_read_4 | |
302 | #define this_cpu_read_4(pcp) this_cpu_generic_read(pcp) | |
303 | #endif | |
304 | #ifndef this_cpu_read_8 | |
305 | #define this_cpu_read_8(pcp) this_cpu_generic_read(pcp) | |
306 | #endif | |
307 | ||
308 | #ifndef this_cpu_write_1 | |
309 | #define this_cpu_write_1(pcp, val) this_cpu_generic_to_op(pcp, val, =) | |
310 | #endif | |
311 | #ifndef this_cpu_write_2 | |
312 | #define this_cpu_write_2(pcp, val) this_cpu_generic_to_op(pcp, val, =) | |
313 | #endif | |
314 | #ifndef this_cpu_write_4 | |
315 | #define this_cpu_write_4(pcp, val) this_cpu_generic_to_op(pcp, val, =) | |
316 | #endif | |
317 | #ifndef this_cpu_write_8 | |
318 | #define this_cpu_write_8(pcp, val) this_cpu_generic_to_op(pcp, val, =) | |
319 | #endif | |
320 | ||
321 | #ifndef this_cpu_add_1 | |
322 | #define this_cpu_add_1(pcp, val) this_cpu_generic_to_op(pcp, val, +=) | |
323 | #endif | |
324 | #ifndef this_cpu_add_2 | |
325 | #define this_cpu_add_2(pcp, val) this_cpu_generic_to_op(pcp, val, +=) | |
326 | #endif | |
327 | #ifndef this_cpu_add_4 | |
328 | #define this_cpu_add_4(pcp, val) this_cpu_generic_to_op(pcp, val, +=) | |
329 | #endif | |
330 | #ifndef this_cpu_add_8 | |
331 | #define this_cpu_add_8(pcp, val) this_cpu_generic_to_op(pcp, val, +=) | |
332 | #endif | |
333 | ||
334 | #ifndef this_cpu_and_1 | |
335 | #define this_cpu_and_1(pcp, val) this_cpu_generic_to_op(pcp, val, &=) | |
336 | #endif | |
337 | #ifndef this_cpu_and_2 | |
338 | #define this_cpu_and_2(pcp, val) this_cpu_generic_to_op(pcp, val, &=) | |
339 | #endif | |
340 | #ifndef this_cpu_and_4 | |
341 | #define this_cpu_and_4(pcp, val) this_cpu_generic_to_op(pcp, val, &=) | |
342 | #endif | |
343 | #ifndef this_cpu_and_8 | |
344 | #define this_cpu_and_8(pcp, val) this_cpu_generic_to_op(pcp, val, &=) | |
345 | #endif | |
346 | ||
347 | #ifndef this_cpu_or_1 | |
348 | #define this_cpu_or_1(pcp, val) this_cpu_generic_to_op(pcp, val, |=) | |
349 | #endif | |
350 | #ifndef this_cpu_or_2 | |
351 | #define this_cpu_or_2(pcp, val) this_cpu_generic_to_op(pcp, val, |=) | |
352 | #endif | |
353 | #ifndef this_cpu_or_4 | |
354 | #define this_cpu_or_4(pcp, val) this_cpu_generic_to_op(pcp, val, |=) | |
355 | #endif | |
356 | #ifndef this_cpu_or_8 | |
357 | #define this_cpu_or_8(pcp, val) this_cpu_generic_to_op(pcp, val, |=) | |
358 | #endif | |
359 | ||
360 | #ifndef this_cpu_add_return_1 | |
361 | #define this_cpu_add_return_1(pcp, val) this_cpu_generic_add_return(pcp, val) | |
362 | #endif | |
363 | #ifndef this_cpu_add_return_2 | |
364 | #define this_cpu_add_return_2(pcp, val) this_cpu_generic_add_return(pcp, val) | |
365 | #endif | |
366 | #ifndef this_cpu_add_return_4 | |
367 | #define this_cpu_add_return_4(pcp, val) this_cpu_generic_add_return(pcp, val) | |
368 | #endif | |
369 | #ifndef this_cpu_add_return_8 | |
370 | #define this_cpu_add_return_8(pcp, val) this_cpu_generic_add_return(pcp, val) | |
371 | #endif | |
372 | ||
373 | #ifndef this_cpu_xchg_1 | |
374 | #define this_cpu_xchg_1(pcp, nval) this_cpu_generic_xchg(pcp, nval) | |
375 | #endif | |
376 | #ifndef this_cpu_xchg_2 | |
377 | #define this_cpu_xchg_2(pcp, nval) this_cpu_generic_xchg(pcp, nval) | |
378 | #endif | |
379 | #ifndef this_cpu_xchg_4 | |
380 | #define this_cpu_xchg_4(pcp, nval) this_cpu_generic_xchg(pcp, nval) | |
381 | #endif | |
382 | #ifndef this_cpu_xchg_8 | |
383 | #define this_cpu_xchg_8(pcp, nval) this_cpu_generic_xchg(pcp, nval) | |
384 | #endif | |
385 | ||
386 | #ifndef this_cpu_cmpxchg_1 | |
387 | #define this_cpu_cmpxchg_1(pcp, oval, nval) \ | |
388 | this_cpu_generic_cmpxchg(pcp, oval, nval) | |
389 | #endif | |
390 | #ifndef this_cpu_cmpxchg_2 | |
391 | #define this_cpu_cmpxchg_2(pcp, oval, nval) \ | |
392 | this_cpu_generic_cmpxchg(pcp, oval, nval) | |
393 | #endif | |
394 | #ifndef this_cpu_cmpxchg_4 | |
395 | #define this_cpu_cmpxchg_4(pcp, oval, nval) \ | |
396 | this_cpu_generic_cmpxchg(pcp, oval, nval) | |
397 | #endif | |
398 | #ifndef this_cpu_cmpxchg_8 | |
399 | #define this_cpu_cmpxchg_8(pcp, oval, nval) \ | |
400 | this_cpu_generic_cmpxchg(pcp, oval, nval) | |
401 | #endif | |
402 | ||
403 | #ifndef this_cpu_cmpxchg_double_1 | |
404 | #define this_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
405 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
406 | #endif | |
407 | #ifndef this_cpu_cmpxchg_double_2 | |
408 | #define this_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
409 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
410 | #endif | |
411 | #ifndef this_cpu_cmpxchg_double_4 | |
412 | #define this_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
413 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
414 | #endif | |
415 | #ifndef this_cpu_cmpxchg_double_8 | |
416 | #define this_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
417 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
418 | #endif | |
47b69ad6 | 419 | |
1da177e4 | 420 | #endif /* _ASM_GENERIC_PERCPU_H_ */ |