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7a0268fa AB |
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 (__i = 0; __i < NR_CPUS; __i++) \ | |
31 | if (cpu_possible(__i)) \ | |
32 | memcpy((pcpudst)+__per_cpu_offset(__i), \ | |
33 | (src), (size)); \ | |
34 | } while (0) | |
35 | ||
36 | extern void setup_per_cpu_areas(void); | |
37 | ||
38 | #else /* ! SMP */ | |
39 | ||
40 | #define DEFINE_PER_CPU(type, name) \ | |
41 | __typeof__(type) per_cpu__##name | |
42 | ||
43 | #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var)) | |
44 | #define __get_cpu_var(var) per_cpu__##var | |
45 | ||
46 | #endif /* SMP */ | |
47 | ||
48 | #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name | |
49 | ||
50 | #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var) | |
51 | #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var) | |
52 | ||
53 | #else | |
6f9aa727 | 54 | #include <asm-generic/percpu.h> |
7a0268fa AB |
55 | #endif |
56 | ||
57 | #endif /* _ASM_POWERPC_PERCPU_H_ */ |