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#define per_cpu_offset(x) (__per_cpu_offset(x))
18
19/* Separate out the type, so (int[3], foo) works. */
20#define DEFINE_PER_CPU(type, name) \
21    __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
22
23/* var is in discarded region: offset to particular copy we want */
24#define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)))
25#define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()))
26#define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()))
27
28/* A macro to avoid #include hell... */
29#define percpu_modcopy(pcpudst, src, size)			\
30do {								\
31	unsigned int __i;					\
32	for_each_possible_cpu(__i)				\
33		memcpy((pcpudst)+__per_cpu_offset(__i),		\
34		       (src), (size));				\
35} while (0)
36
37extern void setup_per_cpu_areas(void);
38
39#else /* ! SMP */
40
41#define DEFINE_PER_CPU(type, name) \
42    __typeof__(type) per_cpu__##name
43
44#define per_cpu(var, cpu)			(*((void)(cpu), &per_cpu__##var))
45#define __get_cpu_var(var)			per_cpu__##var
46#define __raw_get_cpu_var(var)			per_cpu__##var
47
48#endif	/* SMP */
49
50#define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
51
52#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
53#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
54
55#else
56#include <asm-generic/percpu.h>
57#endif
58
59#endif /* _ASM_POWERPC_PERCPU_H_ */
60