56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
|
#ifndef _ASM_X8664_PERCPU_H_
|
||
|
|
#define _ASM_X8664_PERCPU_H_
|
||
|
|
#include <linux/compiler.h>
|
||
|
|
|
||
|
|
/* Same as asm-generic/percpu.h, except that we store the per cpu offset
|
||
|
|
in the PDA. Longer term the PDA and every per cpu variable
|
||
|
|
should be just put into a single section and referenced directly
|
||
|
|
from %gs */
|
||
|
|
|
||
|
|
#ifdef CONFIG_SMP
|
||
|
|
|
||
|
|
#include <asm/pda.h>
|
||
|
|
|
||
|
|
#define __per_cpu_offset(cpu) (cpu_pda(cpu)->data_offset)
|
||
|
|
#define __my_cpu_offset() read_pda(data_offset)
|
||
|
|
|
||
|
|
#define per_cpu_offset(x) (__per_cpu_offset(x))
|
||
|
|
|
||
|
|
/* Separate out the type, so (int[3], foo) works. */
|
||
|
|
#define DEFINE_PER_CPU(type, name) \
|
||
|
|
__attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
|
||
|
|
|
||
|
|
/* 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, __my_cpu_offset()))
|
||
|
|
|
||
|
|
/* A macro to avoid #include hell... */
|
||
|
|
#define percpu_modcopy(pcpudst, src, size) \
|
||
|
|
do { \
|
||
|
|
unsigned int __i; \
|
||
|
|
for_each_possible_cpu(__i) \
|
||
|
|
memcpy((pcpudst)+__per_cpu_offset(__i), \
|
||
|
|
(src), (size)); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
extern void setup_per_cpu_areas(void);
|
||
|
|
|
||
|
|
#else /* ! SMP */
|
||
|
|
|
||
|
|
#define DEFINE_PER_CPU(type, name) \
|
||
|
|
__typeof__(type) per_cpu__##name
|
||
|
|
|
||
|
|
#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
|
||
|
|
|
||
|
|
#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
|
||
|
|
#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
|
||
|
|
|
||
|
|
#endif /* _ASM_X8664_PERCPU_H_ */
|