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1da177e4 LT |
1 | #ifndef _ASM_IA64_PERCPU_H |
2 | #define _ASM_IA64_PERCPU_H | |
3 | ||
4 | /* | |
5 | * Copyright (C) 2002-2003 Hewlett-Packard Co | |
6 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
7 | */ | |
8 | ||
9 | #define PERCPU_ENOUGH_ROOM PERCPU_PAGE_SIZE | |
10 | ||
11 | #ifdef __ASSEMBLY__ | |
12 | # define THIS_CPU(var) (per_cpu__##var) /* use this to mark accesses to per-CPU variables... */ | |
13 | #else /* !__ASSEMBLY__ */ | |
14 | ||
1da177e4 LT |
15 | |
16 | #include <linux/threads.h> | |
17 | ||
18 | #ifdef HAVE_MODEL_SMALL_ATTRIBUTE | |
19 | # define __SMALL_ADDR_AREA __attribute__((__model__ (__small__))) | |
20 | #else | |
21 | # define __SMALL_ADDR_AREA | |
22 | #endif | |
23 | ||
24 | #define DECLARE_PER_CPU(type, name) \ | |
25 | extern __SMALL_ADDR_AREA __typeof__(type) per_cpu__##name | |
26 | ||
27 | /* Separate out the type, so (int[3], foo) works. */ | |
28 | #define DEFINE_PER_CPU(type, name) \ | |
29 | __attribute__((__section__(".data.percpu"))) \ | |
30 | __SMALL_ADDR_AREA __typeof__(type) per_cpu__##name | |
31 | ||
32 | /* | |
33 | * Pretty much a literal copy of asm-generic/percpu.h, except that percpu_modcopy() is an | |
34 | * external routine, to avoid include-hell. | |
35 | */ | |
36 | #ifdef CONFIG_SMP | |
37 | ||
38 | extern unsigned long __per_cpu_offset[NR_CPUS]; | |
39 | ||
40 | /* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */ | |
41 | DECLARE_PER_CPU(unsigned long, local_per_cpu_offset); | |
42 | ||
43 | #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu])) | |
44 | #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset))) | |
bfe5d834 | 45 | #define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset))) |
1da177e4 LT |
46 | |
47 | extern void percpu_modcopy(void *pcpudst, const void *src, unsigned long size); | |
48 | extern void setup_per_cpu_areas (void); | |
49 | extern void *per_cpu_init(void); | |
50 | ||
51 | #else /* ! SMP */ | |
52 | ||
11c80c83 | 53 | #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var)) |
1da177e4 | 54 | #define __get_cpu_var(var) per_cpu__##var |
bfe5d834 | 55 | #define __raw_get_cpu_var(var) per_cpu__##var |
1da177e4 LT |
56 | #define per_cpu_init() (__phys_per_cpu_start) |
57 | ||
58 | #endif /* SMP */ | |
59 | ||
60 | #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var) | |
61 | #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var) | |
62 | ||
63 | /* | |
64 | * Be extremely careful when taking the address of this variable! Due to virtual | |
65 | * remapping, it is different from the canonical address returned by __get_cpu_var(var)! | |
66 | * On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly | |
67 | * more efficient. | |
68 | */ | |
69 | #define __ia64_per_cpu_var(var) (per_cpu__##var) | |
70 | ||
71 | #endif /* !__ASSEMBLY__ */ | |
72 | ||
73 | #endif /* _ASM_IA64_PERCPU_H */ |