Linux kernel mirror (for testing)
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linux
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
18extern 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
47extern 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) \
74do { \
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(pcp) \
119({ \
120 typeof(pcp) __ret; \
121 preempt_disable_notrace(); \
122 __ret = raw_cpu_generic_read(pcp); \
123 preempt_enable_notrace(); \
124 __ret; \
125})
126
127#define this_cpu_generic_to_op(pcp, val, op) \
128do { \
129 unsigned long __flags; \
130 raw_local_irq_save(__flags); \
131 raw_cpu_generic_to_op(pcp, val, op); \
132 raw_local_irq_restore(__flags); \
133} while (0)
134
135
136#define this_cpu_generic_add_return(pcp, val) \
137({ \
138 typeof(pcp) __ret; \
139 unsigned long __flags; \
140 raw_local_irq_save(__flags); \
141 __ret = raw_cpu_generic_add_return(pcp, val); \
142 raw_local_irq_restore(__flags); \
143 __ret; \
144})
145
146#define this_cpu_generic_xchg(pcp, nval) \
147({ \
148 typeof(pcp) __ret; \
149 unsigned long __flags; \
150 raw_local_irq_save(__flags); \
151 __ret = raw_cpu_generic_xchg(pcp, nval); \
152 raw_local_irq_restore(__flags); \
153 __ret; \
154})
155
156#define this_cpu_generic_cmpxchg(pcp, oval, nval) \
157({ \
158 typeof(pcp) __ret; \
159 unsigned long __flags; \
160 raw_local_irq_save(__flags); \
161 __ret = raw_cpu_generic_cmpxchg(pcp, oval, nval); \
162 raw_local_irq_restore(__flags); \
163 __ret; \
164})
165
166#define this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
167({ \
168 int __ret; \
169 unsigned long __flags; \
170 raw_local_irq_save(__flags); \
171 __ret = raw_cpu_generic_cmpxchg_double(pcp1, pcp2, \
172 oval1, oval2, nval1, nval2); \
173 raw_local_irq_restore(__flags); \
174 __ret; \
175})
176
177#ifndef raw_cpu_read_1
178#define raw_cpu_read_1(pcp) raw_cpu_generic_read(pcp)
179#endif
180#ifndef raw_cpu_read_2
181#define raw_cpu_read_2(pcp) raw_cpu_generic_read(pcp)
182#endif
183#ifndef raw_cpu_read_4
184#define raw_cpu_read_4(pcp) raw_cpu_generic_read(pcp)
185#endif
186#ifndef raw_cpu_read_8
187#define raw_cpu_read_8(pcp) raw_cpu_generic_read(pcp)
188#endif
189
190#ifndef raw_cpu_write_1
191#define raw_cpu_write_1(pcp, val) raw_cpu_generic_to_op(pcp, val, =)
192#endif
193#ifndef raw_cpu_write_2
194#define raw_cpu_write_2(pcp, val) raw_cpu_generic_to_op(pcp, val, =)
195#endif
196#ifndef raw_cpu_write_4
197#define raw_cpu_write_4(pcp, val) raw_cpu_generic_to_op(pcp, val, =)
198#endif
199#ifndef raw_cpu_write_8
200#define raw_cpu_write_8(pcp, val) raw_cpu_generic_to_op(pcp, val, =)
201#endif
202
203#ifndef raw_cpu_add_1
204#define raw_cpu_add_1(pcp, val) raw_cpu_generic_to_op(pcp, val, +=)
205#endif
206#ifndef raw_cpu_add_2
207#define raw_cpu_add_2(pcp, val) raw_cpu_generic_to_op(pcp, val, +=)
208#endif
209#ifndef raw_cpu_add_4
210#define raw_cpu_add_4(pcp, val) raw_cpu_generic_to_op(pcp, val, +=)
211#endif
212#ifndef raw_cpu_add_8
213#define raw_cpu_add_8(pcp, val) raw_cpu_generic_to_op(pcp, val, +=)
214#endif
215
216#ifndef raw_cpu_and_1
217#define raw_cpu_and_1(pcp, val) raw_cpu_generic_to_op(pcp, val, &=)
218#endif
219#ifndef raw_cpu_and_2
220#define raw_cpu_and_2(pcp, val) raw_cpu_generic_to_op(pcp, val, &=)
221#endif
222#ifndef raw_cpu_and_4
223#define raw_cpu_and_4(pcp, val) raw_cpu_generic_to_op(pcp, val, &=)
224#endif
225#ifndef raw_cpu_and_8
226#define raw_cpu_and_8(pcp, val) raw_cpu_generic_to_op(pcp, val, &=)
227#endif
228
229#ifndef raw_cpu_or_1
230#define raw_cpu_or_1(pcp, val) raw_cpu_generic_to_op(pcp, val, |=)
231#endif
232#ifndef raw_cpu_or_2
233#define raw_cpu_or_2(pcp, val) raw_cpu_generic_to_op(pcp, val, |=)
234#endif
235#ifndef raw_cpu_or_4
236#define raw_cpu_or_4(pcp, val) raw_cpu_generic_to_op(pcp, val, |=)
237#endif
238#ifndef raw_cpu_or_8
239#define raw_cpu_or_8(pcp, val) raw_cpu_generic_to_op(pcp, val, |=)
240#endif
241
242#ifndef raw_cpu_add_return_1
243#define raw_cpu_add_return_1(pcp, val) raw_cpu_generic_add_return(pcp, val)
244#endif
245#ifndef raw_cpu_add_return_2
246#define raw_cpu_add_return_2(pcp, val) raw_cpu_generic_add_return(pcp, val)
247#endif
248#ifndef raw_cpu_add_return_4
249#define raw_cpu_add_return_4(pcp, val) raw_cpu_generic_add_return(pcp, val)
250#endif
251#ifndef raw_cpu_add_return_8
252#define raw_cpu_add_return_8(pcp, val) raw_cpu_generic_add_return(pcp, val)
253#endif
254
255#ifndef raw_cpu_xchg_1
256#define raw_cpu_xchg_1(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
257#endif
258#ifndef raw_cpu_xchg_2
259#define raw_cpu_xchg_2(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
260#endif
261#ifndef raw_cpu_xchg_4
262#define raw_cpu_xchg_4(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
263#endif
264#ifndef raw_cpu_xchg_8
265#define raw_cpu_xchg_8(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
266#endif
267
268#ifndef raw_cpu_cmpxchg_1
269#define raw_cpu_cmpxchg_1(pcp, oval, nval) \
270 raw_cpu_generic_cmpxchg(pcp, oval, nval)
271#endif
272#ifndef raw_cpu_cmpxchg_2
273#define raw_cpu_cmpxchg_2(pcp, oval, nval) \
274 raw_cpu_generic_cmpxchg(pcp, oval, nval)
275#endif
276#ifndef raw_cpu_cmpxchg_4
277#define raw_cpu_cmpxchg_4(pcp, oval, nval) \
278 raw_cpu_generic_cmpxchg(pcp, oval, nval)
279#endif
280#ifndef raw_cpu_cmpxchg_8
281#define raw_cpu_cmpxchg_8(pcp, oval, nval) \
282 raw_cpu_generic_cmpxchg(pcp, oval, nval)
283#endif
284
285#ifndef raw_cpu_cmpxchg_double_1
286#define raw_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \
287 raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
288#endif
289#ifndef raw_cpu_cmpxchg_double_2
290#define raw_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \
291 raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
292#endif
293#ifndef raw_cpu_cmpxchg_double_4
294#define raw_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \
295 raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
296#endif
297#ifndef raw_cpu_cmpxchg_double_8
298#define raw_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \
299 raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
300#endif
301
302#ifndef this_cpu_read_1
303#define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
304#endif
305#ifndef this_cpu_read_2
306#define this_cpu_read_2(pcp) this_cpu_generic_read(pcp)
307#endif
308#ifndef this_cpu_read_4
309#define this_cpu_read_4(pcp) this_cpu_generic_read(pcp)
310#endif
311#ifndef this_cpu_read_8
312#define this_cpu_read_8(pcp) this_cpu_generic_read(pcp)
313#endif
314
315#ifndef this_cpu_write_1
316#define this_cpu_write_1(pcp, val) this_cpu_generic_to_op(pcp, val, =)
317#endif
318#ifndef this_cpu_write_2
319#define this_cpu_write_2(pcp, val) this_cpu_generic_to_op(pcp, val, =)
320#endif
321#ifndef this_cpu_write_4
322#define this_cpu_write_4(pcp, val) this_cpu_generic_to_op(pcp, val, =)
323#endif
324#ifndef this_cpu_write_8
325#define this_cpu_write_8(pcp, val) this_cpu_generic_to_op(pcp, val, =)
326#endif
327
328#ifndef this_cpu_add_1
329#define this_cpu_add_1(pcp, val) this_cpu_generic_to_op(pcp, val, +=)
330#endif
331#ifndef this_cpu_add_2
332#define this_cpu_add_2(pcp, val) this_cpu_generic_to_op(pcp, val, +=)
333#endif
334#ifndef this_cpu_add_4
335#define this_cpu_add_4(pcp, val) this_cpu_generic_to_op(pcp, val, +=)
336#endif
337#ifndef this_cpu_add_8
338#define this_cpu_add_8(pcp, val) this_cpu_generic_to_op(pcp, val, +=)
339#endif
340
341#ifndef this_cpu_and_1
342#define this_cpu_and_1(pcp, val) this_cpu_generic_to_op(pcp, val, &=)
343#endif
344#ifndef this_cpu_and_2
345#define this_cpu_and_2(pcp, val) this_cpu_generic_to_op(pcp, val, &=)
346#endif
347#ifndef this_cpu_and_4
348#define this_cpu_and_4(pcp, val) this_cpu_generic_to_op(pcp, val, &=)
349#endif
350#ifndef this_cpu_and_8
351#define this_cpu_and_8(pcp, val) this_cpu_generic_to_op(pcp, val, &=)
352#endif
353
354#ifndef this_cpu_or_1
355#define this_cpu_or_1(pcp, val) this_cpu_generic_to_op(pcp, val, |=)
356#endif
357#ifndef this_cpu_or_2
358#define this_cpu_or_2(pcp, val) this_cpu_generic_to_op(pcp, val, |=)
359#endif
360#ifndef this_cpu_or_4
361#define this_cpu_or_4(pcp, val) this_cpu_generic_to_op(pcp, val, |=)
362#endif
363#ifndef this_cpu_or_8
364#define this_cpu_or_8(pcp, val) this_cpu_generic_to_op(pcp, val, |=)
365#endif
366
367#ifndef this_cpu_add_return_1
368#define this_cpu_add_return_1(pcp, val) this_cpu_generic_add_return(pcp, val)
369#endif
370#ifndef this_cpu_add_return_2
371#define this_cpu_add_return_2(pcp, val) this_cpu_generic_add_return(pcp, val)
372#endif
373#ifndef this_cpu_add_return_4
374#define this_cpu_add_return_4(pcp, val) this_cpu_generic_add_return(pcp, val)
375#endif
376#ifndef this_cpu_add_return_8
377#define this_cpu_add_return_8(pcp, val) this_cpu_generic_add_return(pcp, val)
378#endif
379
380#ifndef this_cpu_xchg_1
381#define this_cpu_xchg_1(pcp, nval) this_cpu_generic_xchg(pcp, nval)
382#endif
383#ifndef this_cpu_xchg_2
384#define this_cpu_xchg_2(pcp, nval) this_cpu_generic_xchg(pcp, nval)
385#endif
386#ifndef this_cpu_xchg_4
387#define this_cpu_xchg_4(pcp, nval) this_cpu_generic_xchg(pcp, nval)
388#endif
389#ifndef this_cpu_xchg_8
390#define this_cpu_xchg_8(pcp, nval) this_cpu_generic_xchg(pcp, nval)
391#endif
392
393#ifndef this_cpu_cmpxchg_1
394#define this_cpu_cmpxchg_1(pcp, oval, nval) \
395 this_cpu_generic_cmpxchg(pcp, oval, nval)
396#endif
397#ifndef this_cpu_cmpxchg_2
398#define this_cpu_cmpxchg_2(pcp, oval, nval) \
399 this_cpu_generic_cmpxchg(pcp, oval, nval)
400#endif
401#ifndef this_cpu_cmpxchg_4
402#define this_cpu_cmpxchg_4(pcp, oval, nval) \
403 this_cpu_generic_cmpxchg(pcp, oval, nval)
404#endif
405#ifndef this_cpu_cmpxchg_8
406#define this_cpu_cmpxchg_8(pcp, oval, nval) \
407 this_cpu_generic_cmpxchg(pcp, oval, nval)
408#endif
409
410#ifndef this_cpu_cmpxchg_double_1
411#define this_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \
412 this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
413#endif
414#ifndef this_cpu_cmpxchg_double_2
415#define this_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \
416 this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
417#endif
418#ifndef this_cpu_cmpxchg_double_4
419#define this_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \
420 this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
421#endif
422#ifndef this_cpu_cmpxchg_double_8
423#define this_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \
424 this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
425#endif
426
427#endif /* _ASM_GENERIC_PERCPU_H_ */