aboutsummaryrefslogtreecommitdiff
path: root/include/asm-powerpc/percpu.h
blob: 1b7568838b43cf92a7ad8ef135c34ad6de5344be (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
#ifndef _ASM_POWERPC_PERCPU_H_
#define _ASM_POWERPC_PERCPU_H_
#ifdef __powerpc64__
#include <linux/compiler.h>

/*
 * Same as asm-generic/percpu.h, except that we store the per cpu offset
 * in the paca. Based on the x86-64 implementation.
 */

#ifdef CONFIG_SMP

#include <asm/paca.h>

#define __per_cpu_offset(cpu) (paca[cpu].data_offset)
#define __my_cpu_offset() get_paca()->data_offset
#define per_cpu_offset(x) (__per_cpu_offset(x))

/* var is in discarded region: offset to particular copy we want */
#define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)))
#define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()))
#define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, local_paca->data_offset))

extern void setup_per_cpu_areas(void);

#else /* ! SMP */

#define per_cpu(var, cpu)			(*((void)(cpu), &per_cpu__##var))
#define __get_cpu_var(var)			per_cpu__##var
#define __raw_get_cpu_var(var)			per_cpu__##var

#endif	/* SMP */

#define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name

#else
#include <asm-generic/percpu.h>
#endif

#endif /* _ASM_POWERPC_PERCPU_H_ */