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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) \
28do { \
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
36extern 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
54#include <asm-generic/percpu.h>
55#endif
56
57#endif /* _ASM_POWERPC_PERCPU_H_ */