[PATCH] for_each_possible_cpu: powerpc
[linux-2.6.git] / include / asm-powerpc / percpu.h
1 #ifndef _ASM_POWERPC_PERCPU_H_
2 #define _ASM_POWERPC_PERCPU_H_
3 #ifdef __powerpc64__
4 #include <linux/compiler.h>
5
6 /*
7  * Same as asm-generic/percpu.h, except that we store the per cpu offset
8  * in the paca. Based on the x86-64 implementation.
9  */
10
11 #ifdef CONFIG_SMP
12
13 #include <asm/paca.h>
14
15 #define __per_cpu_offset(cpu) (paca[cpu].data_offset)
16 #define __my_cpu_offset() get_paca()->data_offset
17
18 /* Separate out the type, so (int[3], foo) works. */
19 #define DEFINE_PER_CPU(type, name) \
20     __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
21
22 /* var is in discarded region: offset to particular copy we want */
23 #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)))
24 #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()))
25
26 /* A macro to avoid #include hell... */
27 #define percpu_modcopy(pcpudst, src, size)                      \
28 do {                                                            \
29         unsigned int __i;                                       \
30         for_each_possible_cpu(__i)                              \
31                 memcpy((pcpudst)+__per_cpu_offset(__i),         \
32                        (src), (size));                          \
33 } while (0)
34
35 extern void setup_per_cpu_areas(void);
36
37 #else /* ! SMP */
38
39 #define DEFINE_PER_CPU(type, name) \
40     __typeof__(type) per_cpu__##name
41
42 #define per_cpu(var, cpu)                       (*((void)(cpu), &per_cpu__##var))
43 #define __get_cpu_var(var)                      per_cpu__##var
44
45 #endif  /* SMP */
46
47 #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
48
49 #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
50 #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
51
52 #else
53 #include <asm-generic/percpu.h>
54 #endif
55
56 #endif /* _ASM_POWERPC_PERCPU_H_ */