projects / linux-block.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 | |
| 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 | ||
| 5fb7dc37 FY |
32 | #ifdef CONFIG_SMP |
| 33 | #define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \ | |
| 34 | __attribute__((__section__(".data.percpu.shared_aligned"))) \ | |
| 35 | __SMALL_ADDR_AREA __typeof__(type) per_cpu__##name \ | |
| 36 | ____cacheline_aligned_in_smp | |
| 37 | #else | |
| 38 | #define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \ | |
| 39 | DEFINE_PER_CPU(type, name) | |
| 40 | #endif | |
| 41 | ||
| 1da177e4 LT |
42 | /* |
| 43 | * Pretty much a literal copy of asm-generic/percpu.h, except that percpu_modcopy() is an | |
| 44 | * external routine, to avoid include-hell. | |
| 45 | */ | |
| 46 | #ifdef CONFIG_SMP | |
| 47 | ||
| 48 | extern unsigned long __per_cpu_offset[NR_CPUS]; | |
| a875a69f | 49 | #define per_cpu_offset(x) (__per_cpu_offset(x)) |
| 1da177e4 LT |
50 | |
| 51 | /* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */ | |
| 52 | DECLARE_PER_CPU(unsigned long, local_per_cpu_offset); | |
| 53 | ||
| 54 | #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu])) | |
| 55 | #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset))) | |
| bfe5d834 | 56 | #define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset))) |
| 1da177e4 LT |
57 | |
| 58 | extern void percpu_modcopy(void *pcpudst, const void *src, unsigned long size); | |
| 59 | extern void setup_per_cpu_areas (void); | |
| 60 | extern void *per_cpu_init(void); | |
| 61 | ||
| 62 | #else /* ! SMP */ | |
| 63 | ||
| 11c80c83 | 64 | #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var)) |
| 1da177e4 | 65 | #define __get_cpu_var(var) per_cpu__##var |
| bfe5d834 | 66 | #define __raw_get_cpu_var(var) per_cpu__##var |
| 1da177e4 LT |
67 | #define per_cpu_init() (__phys_per_cpu_start) |
| 68 | ||
| 69 | #endif /* SMP */ | |
| 70 | ||
| 71 | #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var) | |
| 72 | #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var) | |
| 73 | ||
| 74 | /* | |
| 75 | * Be extremely careful when taking the address of this variable! Due to virtual | |
| 76 | * remapping, it is different from the canonical address returned by __get_cpu_var(var)! | |
| 77 | * On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly | |
| 78 | * more efficient. | |
| 79 | */ | |
| 80 | #define __ia64_per_cpu_var(var) (per_cpu__##var) | |
| 81 | ||
| 82 | #endif /* !__ASSEMBLY__ */ | |
| 83 | ||
| 84 | #endif /* _ASM_IA64_PERCPU_H */ |