projects / mirror_ubuntu-kernels.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | |
| 5280e004 | 19 | # define PER_CPU_ATTRIBUTES __attribute__((__model__ (__small__))) |
| 1da177e4 LT |
20 | #endif |
| 21 | ||
| 22 | #define DECLARE_PER_CPU(type, name) \ | |
| 5280e004 | 23 | extern PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name |
| 5fb7dc37 | 24 | |
| 1da177e4 LT |
25 | /* |
| 26 | * Pretty much a literal copy of asm-generic/percpu.h, except that percpu_modcopy() is an | |
| 27 | * external routine, to avoid include-hell. | |
| 28 | */ | |
| 29 | #ifdef CONFIG_SMP | |
| 30 | ||
| 31 | extern unsigned long __per_cpu_offset[NR_CPUS]; | |
| d7c4086a | 32 | #define per_cpu_offset(x) (__per_cpu_offset[x]) |
| 1da177e4 LT |
33 | |
| 34 | /* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */ | |
| 35 | DECLARE_PER_CPU(unsigned long, local_per_cpu_offset); | |
| 36 | ||
| 37 | #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu])) | |
| 38 | #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset))) | |
| bfe5d834 | 39 | #define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset))) |
| 1da177e4 LT |
40 | |
| 41 | extern void percpu_modcopy(void *pcpudst, const void *src, unsigned long size); | |
| 42 | extern void setup_per_cpu_areas (void); | |
| 43 | extern void *per_cpu_init(void); | |
| 44 | ||
| 45 | #else /* ! SMP */ | |
| 46 | ||
| 11c80c83 | 47 | #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var)) |
| 1da177e4 | 48 | #define __get_cpu_var(var) per_cpu__##var |
| bfe5d834 | 49 | #define __raw_get_cpu_var(var) per_cpu__##var |
| 1da177e4 LT |
50 | #define per_cpu_init() (__phys_per_cpu_start) |
| 51 | ||
| 52 | #endif /* SMP */ | |
| 53 | ||
| 1da177e4 LT |
54 | /* |
| 55 | * Be extremely careful when taking the address of this variable! Due to virtual | |
| 56 | * remapping, it is different from the canonical address returned by __get_cpu_var(var)! | |
| 57 | * On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly | |
| 58 | * more efficient. | |
| 59 | */ | |
| 60 | #define __ia64_per_cpu_var(var) (per_cpu__##var) | |
| 61 | ||
| 62 | #endif /* !__ASSEMBLY__ */ | |
| 63 | ||
| 64 | #endif /* _ASM_IA64_PERCPU_H */ |