Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
| 16 | #include <linux/threads.h> |
| 17 | |
| 18 | #ifdef HAVE_MODEL_SMALL_ATTRIBUTE |
travis@sgi.com | 5280e00 | 2008-01-30 13:32:52 +0100 | [diff] [blame] | 19 | # define PER_CPU_ATTRIBUTES __attribute__((__model__ (__small__))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #endif |
| 21 | |
| 22 | #define DECLARE_PER_CPU(type, name) \ |
travis@sgi.com | 5280e00 | 2008-01-30 13:32:52 +0100 | [diff] [blame] | 23 | extern PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name |
Fenghua Yu | 5fb7dc3 | 2007-07-19 01:48:12 -0700 | [diff] [blame] | 24 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #ifdef CONFIG_SMP |
| 26 | |
| 27 | extern unsigned long __per_cpu_offset[NR_CPUS]; |
Yu Luming | d7c4086 | 2007-10-29 11:21:45 -0700 | [diff] [blame] | 28 | #define per_cpu_offset(x) (__per_cpu_offset[x]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
| 30 | /* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */ |
| 31 | DECLARE_PER_CPU(unsigned long, local_per_cpu_offset); |
| 32 | |
| 33 | #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu])) |
| 34 | #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset))) |
Paul Mackerras | bfe5d83 | 2006-06-25 05:47:14 -0700 | [diff] [blame] | 35 | #define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | extern void setup_per_cpu_areas (void); |
| 38 | extern void *per_cpu_init(void); |
| 39 | |
| 40 | #else /* ! SMP */ |
| 41 | |
Jan Beulich | 11c80c8 | 2005-06-23 00:09:59 -0700 | [diff] [blame] | 42 | #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #define __get_cpu_var(var) per_cpu__##var |
Paul Mackerras | bfe5d83 | 2006-06-25 05:47:14 -0700 | [diff] [blame] | 44 | #define __raw_get_cpu_var(var) per_cpu__##var |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #define per_cpu_init() (__phys_per_cpu_start) |
| 46 | |
| 47 | #endif /* SMP */ |
| 48 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | /* |
| 50 | * Be extremely careful when taking the address of this variable! Due to virtual |
| 51 | * remapping, it is different from the canonical address returned by __get_cpu_var(var)! |
| 52 | * On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly |
| 53 | * more efficient. |
| 54 | */ |
| 55 | #define __ia64_per_cpu_var(var) (per_cpu__##var) |
| 56 | |
| 57 | #endif /* !__ASSEMBLY__ */ |
| 58 | |
| 59 | #endif /* _ASM_IA64_PERCPU_H */ |