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1 | #ifndef _ASM_GENERIC_PERCPU_H_ | |
2 | #define _ASM_GENERIC_PERCPU_H_ | |
3 | ||
4 | #include <linux/compiler.h> | |
5 | #include <linux/threads.h> | |
6 | #include <linux/percpu-defs.h> | |
7 | ||
8 | #ifdef CONFIG_SMP | |
9 | ||
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 | |
18 | extern unsigned long __per_cpu_offset[NR_CPUS]; | |
19 | ||
20 | #define per_cpu_offset(x) (__per_cpu_offset[x]) | |
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()) | |
31 | #endif | |
32 | #ifdef CONFIG_DEBUG_PREEMPT | |
33 | #define my_cpu_offset per_cpu_offset(smp_processor_id()) | |
34 | #else | |
35 | #define my_cpu_offset __my_cpu_offset | |
36 | #endif | |
37 | ||
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) | |
44 | #endif | |
45 | ||
46 | #ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA | |
47 | extern void setup_per_cpu_areas(void); | |
48 | #endif | |
49 | ||
50 | #endif /* SMP */ | |
51 | ||
52 | #ifndef PER_CPU_BASE_SECTION | |
53 | #ifdef CONFIG_SMP | |
54 | #define PER_CPU_BASE_SECTION ".data..percpu" | |
55 | #else | |
56 | #define PER_CPU_BASE_SECTION ".data" | |
57 | #endif | |
58 | #endif | |
59 | ||
60 | #ifndef PER_CPU_ATTRIBUTES | |
61 | #define PER_CPU_ATTRIBUTES | |
62 | #endif | |
63 | ||
64 | #ifndef PER_CPU_DEF_ATTRIBUTES | |
65 | #define PER_CPU_DEF_ATTRIBUTES | |
66 | #endif | |
67 | ||
68 | #define raw_cpu_generic_read(pcp) \ | |
69 | ({ \ | |
70 | *raw_cpu_ptr(&(pcp)); \ | |
71 | }) | |
72 | ||
73 | #define raw_cpu_generic_to_op(pcp, val, op) \ | |
74 | do { \ | |
75 | *raw_cpu_ptr(&(pcp)) op val; \ | |
76 | } while (0) | |
77 | ||
78 | #define raw_cpu_generic_add_return(pcp, val) \ | |
79 | ({ \ | |
80 | typeof(&(pcp)) __p = raw_cpu_ptr(&(pcp)); \ | |
81 | \ | |
82 | *__p += val; \ | |
83 | *__p; \ | |
84 | }) | |
85 | ||
86 | #define raw_cpu_generic_xchg(pcp, nval) \ | |
87 | ({ \ | |
88 | typeof(&(pcp)) __p = raw_cpu_ptr(&(pcp)); \ | |
89 | typeof(pcp) __ret; \ | |
90 | __ret = *__p; \ | |
91 | *__p = nval; \ | |
92 | __ret; \ | |
93 | }) | |
94 | ||
95 | #define raw_cpu_generic_cmpxchg(pcp, oval, nval) \ | |
96 | ({ \ | |
97 | typeof(&(pcp)) __p = raw_cpu_ptr(&(pcp)); \ | |
98 | typeof(pcp) __ret; \ | |
99 | __ret = *__p; \ | |
100 | if (__ret == (oval)) \ | |
101 | *__p = nval; \ | |
102 | __ret; \ | |
103 | }) | |
104 | ||
105 | #define raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
106 | ({ \ | |
107 | typeof(&(pcp1)) __p1 = raw_cpu_ptr(&(pcp1)); \ | |
108 | typeof(&(pcp2)) __p2 = raw_cpu_ptr(&(pcp2)); \ | |
109 | int __ret = 0; \ | |
110 | if (*__p1 == (oval1) && *__p2 == (oval2)) { \ | |
111 | *__p1 = nval1; \ | |
112 | *__p2 = nval2; \ | |
113 | __ret = 1; \ | |
114 | } \ | |
115 | (__ret); \ | |
116 | }) | |
117 | ||
118 | #define __this_cpu_generic_read_nopreempt(pcp) \ | |
119 | ({ \ | |
120 | typeof(pcp) __ret; \ | |
121 | preempt_disable_notrace(); \ | |
122 | __ret = READ_ONCE(*raw_cpu_ptr(&(pcp))); \ | |
123 | preempt_enable_notrace(); \ | |
124 | __ret; \ | |
125 | }) | |
126 | ||
127 | #define __this_cpu_generic_read_noirq(pcp) \ | |
128 | ({ \ | |
129 | typeof(pcp) __ret; \ | |
130 | unsigned long __flags; \ | |
131 | raw_local_irq_save(__flags); \ | |
132 | __ret = raw_cpu_generic_read(pcp); \ | |
133 | raw_local_irq_restore(__flags); \ | |
134 | __ret; \ | |
135 | }) | |
136 | ||
137 | #define this_cpu_generic_read(pcp) \ | |
138 | ({ \ | |
139 | typeof(pcp) __ret; \ | |
140 | if (__native_word(pcp)) \ | |
141 | __ret = __this_cpu_generic_read_nopreempt(pcp); \ | |
142 | else \ | |
143 | __ret = __this_cpu_generic_read_noirq(pcp); \ | |
144 | __ret; \ | |
145 | }) | |
146 | ||
147 | #define this_cpu_generic_to_op(pcp, val, op) \ | |
148 | do { \ | |
149 | unsigned long __flags; \ | |
150 | raw_local_irq_save(__flags); \ | |
151 | raw_cpu_generic_to_op(pcp, val, op); \ | |
152 | raw_local_irq_restore(__flags); \ | |
153 | } while (0) | |
154 | ||
155 | ||
156 | #define this_cpu_generic_add_return(pcp, val) \ | |
157 | ({ \ | |
158 | typeof(pcp) __ret; \ | |
159 | unsigned long __flags; \ | |
160 | raw_local_irq_save(__flags); \ | |
161 | __ret = raw_cpu_generic_add_return(pcp, val); \ | |
162 | raw_local_irq_restore(__flags); \ | |
163 | __ret; \ | |
164 | }) | |
165 | ||
166 | #define this_cpu_generic_xchg(pcp, nval) \ | |
167 | ({ \ | |
168 | typeof(pcp) __ret; \ | |
169 | unsigned long __flags; \ | |
170 | raw_local_irq_save(__flags); \ | |
171 | __ret = raw_cpu_generic_xchg(pcp, nval); \ | |
172 | raw_local_irq_restore(__flags); \ | |
173 | __ret; \ | |
174 | }) | |
175 | ||
176 | #define this_cpu_generic_cmpxchg(pcp, oval, nval) \ | |
177 | ({ \ | |
178 | typeof(pcp) __ret; \ | |
179 | unsigned long __flags; \ | |
180 | raw_local_irq_save(__flags); \ | |
181 | __ret = raw_cpu_generic_cmpxchg(pcp, oval, nval); \ | |
182 | raw_local_irq_restore(__flags); \ | |
183 | __ret; \ | |
184 | }) | |
185 | ||
186 | #define this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
187 | ({ \ | |
188 | int __ret; \ | |
189 | unsigned long __flags; \ | |
190 | raw_local_irq_save(__flags); \ | |
191 | __ret = raw_cpu_generic_cmpxchg_double(pcp1, pcp2, \ | |
192 | oval1, oval2, nval1, nval2); \ | |
193 | raw_local_irq_restore(__flags); \ | |
194 | __ret; \ | |
195 | }) | |
196 | ||
197 | #ifndef raw_cpu_read_1 | |
198 | #define raw_cpu_read_1(pcp) raw_cpu_generic_read(pcp) | |
199 | #endif | |
200 | #ifndef raw_cpu_read_2 | |
201 | #define raw_cpu_read_2(pcp) raw_cpu_generic_read(pcp) | |
202 | #endif | |
203 | #ifndef raw_cpu_read_4 | |
204 | #define raw_cpu_read_4(pcp) raw_cpu_generic_read(pcp) | |
205 | #endif | |
206 | #ifndef raw_cpu_read_8 | |
207 | #define raw_cpu_read_8(pcp) raw_cpu_generic_read(pcp) | |
208 | #endif | |
209 | ||
210 | #ifndef raw_cpu_write_1 | |
211 | #define raw_cpu_write_1(pcp, val) raw_cpu_generic_to_op(pcp, val, =) | |
212 | #endif | |
213 | #ifndef raw_cpu_write_2 | |
214 | #define raw_cpu_write_2(pcp, val) raw_cpu_generic_to_op(pcp, val, =) | |
215 | #endif | |
216 | #ifndef raw_cpu_write_4 | |
217 | #define raw_cpu_write_4(pcp, val) raw_cpu_generic_to_op(pcp, val, =) | |
218 | #endif | |
219 | #ifndef raw_cpu_write_8 | |
220 | #define raw_cpu_write_8(pcp, val) raw_cpu_generic_to_op(pcp, val, =) | |
221 | #endif | |
222 | ||
223 | #ifndef raw_cpu_add_1 | |
224 | #define raw_cpu_add_1(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) | |
225 | #endif | |
226 | #ifndef raw_cpu_add_2 | |
227 | #define raw_cpu_add_2(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) | |
228 | #endif | |
229 | #ifndef raw_cpu_add_4 | |
230 | #define raw_cpu_add_4(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) | |
231 | #endif | |
232 | #ifndef raw_cpu_add_8 | |
233 | #define raw_cpu_add_8(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) | |
234 | #endif | |
235 | ||
236 | #ifndef raw_cpu_and_1 | |
237 | #define raw_cpu_and_1(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) | |
238 | #endif | |
239 | #ifndef raw_cpu_and_2 | |
240 | #define raw_cpu_and_2(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) | |
241 | #endif | |
242 | #ifndef raw_cpu_and_4 | |
243 | #define raw_cpu_and_4(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) | |
244 | #endif | |
245 | #ifndef raw_cpu_and_8 | |
246 | #define raw_cpu_and_8(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) | |
247 | #endif | |
248 | ||
249 | #ifndef raw_cpu_or_1 | |
250 | #define raw_cpu_or_1(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) | |
251 | #endif | |
252 | #ifndef raw_cpu_or_2 | |
253 | #define raw_cpu_or_2(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) | |
254 | #endif | |
255 | #ifndef raw_cpu_or_4 | |
256 | #define raw_cpu_or_4(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) | |
257 | #endif | |
258 | #ifndef raw_cpu_or_8 | |
259 | #define raw_cpu_or_8(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) | |
260 | #endif | |
261 | ||
262 | #ifndef raw_cpu_add_return_1 | |
263 | #define raw_cpu_add_return_1(pcp, val) raw_cpu_generic_add_return(pcp, val) | |
264 | #endif | |
265 | #ifndef raw_cpu_add_return_2 | |
266 | #define raw_cpu_add_return_2(pcp, val) raw_cpu_generic_add_return(pcp, val) | |
267 | #endif | |
268 | #ifndef raw_cpu_add_return_4 | |
269 | #define raw_cpu_add_return_4(pcp, val) raw_cpu_generic_add_return(pcp, val) | |
270 | #endif | |
271 | #ifndef raw_cpu_add_return_8 | |
272 | #define raw_cpu_add_return_8(pcp, val) raw_cpu_generic_add_return(pcp, val) | |
273 | #endif | |
274 | ||
275 | #ifndef raw_cpu_xchg_1 | |
276 | #define raw_cpu_xchg_1(pcp, nval) raw_cpu_generic_xchg(pcp, nval) | |
277 | #endif | |
278 | #ifndef raw_cpu_xchg_2 | |
279 | #define raw_cpu_xchg_2(pcp, nval) raw_cpu_generic_xchg(pcp, nval) | |
280 | #endif | |
281 | #ifndef raw_cpu_xchg_4 | |
282 | #define raw_cpu_xchg_4(pcp, nval) raw_cpu_generic_xchg(pcp, nval) | |
283 | #endif | |
284 | #ifndef raw_cpu_xchg_8 | |
285 | #define raw_cpu_xchg_8(pcp, nval) raw_cpu_generic_xchg(pcp, nval) | |
286 | #endif | |
287 | ||
288 | #ifndef raw_cpu_cmpxchg_1 | |
289 | #define raw_cpu_cmpxchg_1(pcp, oval, nval) \ | |
290 | raw_cpu_generic_cmpxchg(pcp, oval, nval) | |
291 | #endif | |
292 | #ifndef raw_cpu_cmpxchg_2 | |
293 | #define raw_cpu_cmpxchg_2(pcp, oval, nval) \ | |
294 | raw_cpu_generic_cmpxchg(pcp, oval, nval) | |
295 | #endif | |
296 | #ifndef raw_cpu_cmpxchg_4 | |
297 | #define raw_cpu_cmpxchg_4(pcp, oval, nval) \ | |
298 | raw_cpu_generic_cmpxchg(pcp, oval, nval) | |
299 | #endif | |
300 | #ifndef raw_cpu_cmpxchg_8 | |
301 | #define raw_cpu_cmpxchg_8(pcp, oval, nval) \ | |
302 | raw_cpu_generic_cmpxchg(pcp, oval, nval) | |
303 | #endif | |
304 | ||
305 | #ifndef raw_cpu_cmpxchg_double_1 | |
306 | #define raw_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
307 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
308 | #endif | |
309 | #ifndef raw_cpu_cmpxchg_double_2 | |
310 | #define raw_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
311 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
312 | #endif | |
313 | #ifndef raw_cpu_cmpxchg_double_4 | |
314 | #define raw_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
315 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
316 | #endif | |
317 | #ifndef raw_cpu_cmpxchg_double_8 | |
318 | #define raw_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
319 | raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
320 | #endif | |
321 | ||
322 | #ifndef this_cpu_read_1 | |
323 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp) | |
324 | #endif | |
325 | #ifndef this_cpu_read_2 | |
326 | #define this_cpu_read_2(pcp) this_cpu_generic_read(pcp) | |
327 | #endif | |
328 | #ifndef this_cpu_read_4 | |
329 | #define this_cpu_read_4(pcp) this_cpu_generic_read(pcp) | |
330 | #endif | |
331 | #ifndef this_cpu_read_8 | |
332 | #define this_cpu_read_8(pcp) this_cpu_generic_read(pcp) | |
333 | #endif | |
334 | ||
335 | #ifndef this_cpu_write_1 | |
336 | #define this_cpu_write_1(pcp, val) this_cpu_generic_to_op(pcp, val, =) | |
337 | #endif | |
338 | #ifndef this_cpu_write_2 | |
339 | #define this_cpu_write_2(pcp, val) this_cpu_generic_to_op(pcp, val, =) | |
340 | #endif | |
341 | #ifndef this_cpu_write_4 | |
342 | #define this_cpu_write_4(pcp, val) this_cpu_generic_to_op(pcp, val, =) | |
343 | #endif | |
344 | #ifndef this_cpu_write_8 | |
345 | #define this_cpu_write_8(pcp, val) this_cpu_generic_to_op(pcp, val, =) | |
346 | #endif | |
347 | ||
348 | #ifndef this_cpu_add_1 | |
349 | #define this_cpu_add_1(pcp, val) this_cpu_generic_to_op(pcp, val, +=) | |
350 | #endif | |
351 | #ifndef this_cpu_add_2 | |
352 | #define this_cpu_add_2(pcp, val) this_cpu_generic_to_op(pcp, val, +=) | |
353 | #endif | |
354 | #ifndef this_cpu_add_4 | |
355 | #define this_cpu_add_4(pcp, val) this_cpu_generic_to_op(pcp, val, +=) | |
356 | #endif | |
357 | #ifndef this_cpu_add_8 | |
358 | #define this_cpu_add_8(pcp, val) this_cpu_generic_to_op(pcp, val, +=) | |
359 | #endif | |
360 | ||
361 | #ifndef this_cpu_and_1 | |
362 | #define this_cpu_and_1(pcp, val) this_cpu_generic_to_op(pcp, val, &=) | |
363 | #endif | |
364 | #ifndef this_cpu_and_2 | |
365 | #define this_cpu_and_2(pcp, val) this_cpu_generic_to_op(pcp, val, &=) | |
366 | #endif | |
367 | #ifndef this_cpu_and_4 | |
368 | #define this_cpu_and_4(pcp, val) this_cpu_generic_to_op(pcp, val, &=) | |
369 | #endif | |
370 | #ifndef this_cpu_and_8 | |
371 | #define this_cpu_and_8(pcp, val) this_cpu_generic_to_op(pcp, val, &=) | |
372 | #endif | |
373 | ||
374 | #ifndef this_cpu_or_1 | |
375 | #define this_cpu_or_1(pcp, val) this_cpu_generic_to_op(pcp, val, |=) | |
376 | #endif | |
377 | #ifndef this_cpu_or_2 | |
378 | #define this_cpu_or_2(pcp, val) this_cpu_generic_to_op(pcp, val, |=) | |
379 | #endif | |
380 | #ifndef this_cpu_or_4 | |
381 | #define this_cpu_or_4(pcp, val) this_cpu_generic_to_op(pcp, val, |=) | |
382 | #endif | |
383 | #ifndef this_cpu_or_8 | |
384 | #define this_cpu_or_8(pcp, val) this_cpu_generic_to_op(pcp, val, |=) | |
385 | #endif | |
386 | ||
387 | #ifndef this_cpu_add_return_1 | |
388 | #define this_cpu_add_return_1(pcp, val) this_cpu_generic_add_return(pcp, val) | |
389 | #endif | |
390 | #ifndef this_cpu_add_return_2 | |
391 | #define this_cpu_add_return_2(pcp, val) this_cpu_generic_add_return(pcp, val) | |
392 | #endif | |
393 | #ifndef this_cpu_add_return_4 | |
394 | #define this_cpu_add_return_4(pcp, val) this_cpu_generic_add_return(pcp, val) | |
395 | #endif | |
396 | #ifndef this_cpu_add_return_8 | |
397 | #define this_cpu_add_return_8(pcp, val) this_cpu_generic_add_return(pcp, val) | |
398 | #endif | |
399 | ||
400 | #ifndef this_cpu_xchg_1 | |
401 | #define this_cpu_xchg_1(pcp, nval) this_cpu_generic_xchg(pcp, nval) | |
402 | #endif | |
403 | #ifndef this_cpu_xchg_2 | |
404 | #define this_cpu_xchg_2(pcp, nval) this_cpu_generic_xchg(pcp, nval) | |
405 | #endif | |
406 | #ifndef this_cpu_xchg_4 | |
407 | #define this_cpu_xchg_4(pcp, nval) this_cpu_generic_xchg(pcp, nval) | |
408 | #endif | |
409 | #ifndef this_cpu_xchg_8 | |
410 | #define this_cpu_xchg_8(pcp, nval) this_cpu_generic_xchg(pcp, nval) | |
411 | #endif | |
412 | ||
413 | #ifndef this_cpu_cmpxchg_1 | |
414 | #define this_cpu_cmpxchg_1(pcp, oval, nval) \ | |
415 | this_cpu_generic_cmpxchg(pcp, oval, nval) | |
416 | #endif | |
417 | #ifndef this_cpu_cmpxchg_2 | |
418 | #define this_cpu_cmpxchg_2(pcp, oval, nval) \ | |
419 | this_cpu_generic_cmpxchg(pcp, oval, nval) | |
420 | #endif | |
421 | #ifndef this_cpu_cmpxchg_4 | |
422 | #define this_cpu_cmpxchg_4(pcp, oval, nval) \ | |
423 | this_cpu_generic_cmpxchg(pcp, oval, nval) | |
424 | #endif | |
425 | #ifndef this_cpu_cmpxchg_8 | |
426 | #define this_cpu_cmpxchg_8(pcp, oval, nval) \ | |
427 | this_cpu_generic_cmpxchg(pcp, oval, nval) | |
428 | #endif | |
429 | ||
430 | #ifndef this_cpu_cmpxchg_double_1 | |
431 | #define this_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
432 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
433 | #endif | |
434 | #ifndef this_cpu_cmpxchg_double_2 | |
435 | #define this_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
436 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
437 | #endif | |
438 | #ifndef this_cpu_cmpxchg_double_4 | |
439 | #define this_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
440 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
441 | #endif | |
442 | #ifndef this_cpu_cmpxchg_double_8 | |
443 | #define this_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \ | |
444 | this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) | |
445 | #endif | |
446 | ||
447 | #endif /* _ASM_GENERIC_PERCPU_H_ */ |