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
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
#ifndef _ASM_IA64_PERCPU_H
#define _ASM_IA64_PERCPU_H
/*
* Copyright (C) 2002-2003 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
*/
#define PERCPU_ENOUGH_ROOM PERCPU_PAGE_SIZE
#ifdef __ASSEMBLY__
# define THIS_CPU(var) (per_cpu__##var) /* use this to mark accesses to per-CPU variables... */
#else /* !__ASSEMBLY__ */
#include <linux/config.h>
#include <linux/threads.h>
#ifdef HAVE_MODEL_SMALL_ATTRIBUTE
# define __SMALL_ADDR_AREA __attribute__((__model__ (__small__)))
#else
# define __SMALL_ADDR_AREA
#endif
#define DECLARE_PER_CPU(type, name) \
extern __SMALL_ADDR_AREA __typeof__(type) per_cpu__##name
/* Separate out the type, so (int[3], foo) works. */
#define DEFINE_PER_CPU(type, name) \
__attribute__((__section__(".data.percpu"))) \
__SMALL_ADDR_AREA __typeof__(type) per_cpu__##name
/*
* Pretty much a literal copy of asm-generic/percpu.h, except that percpu_modcopy() is an
* external routine, to avoid include-hell.
*/
#ifdef CONFIG_SMP
extern unsigned long __per_cpu_offset[NR_CPUS];
/* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */
DECLARE_PER_CPU(unsigned long, local_per_cpu_offset);
#define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu]))
#define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset)))
extern void percpu_modcopy(void *pcpudst, const void *src, unsigned long size);
extern void setup_per_cpu_areas (void);
extern void *per_cpu_init(void);
#else /* ! SMP */
#define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var))
#define __get_cpu_var(var) per_cpu__##var
#define per_cpu_init() (__phys_per_cpu_start)
#endif /* SMP */
#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
/*
* Be extremely careful when taking the address of this variable! Due to virtual
* remapping, it is different from the canonical address returned by __get_cpu_var(var)!
* On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly
* more efficient.
*/
#define __ia64_per_cpu_var(var) (per_cpu__##var)
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_IA64_PERCPU_H */
|
