1 #ifndef _ASM_IA64_PERCPU_H
2 #define _ASM_IA64_PERCPU_H
5 * Copyright (C) 2002-2003 Hewlett-Packard Co
6 * David Mosberger-Tang <davidm@hpl.hp.com>
9 #define PERCPU_ENOUGH_ROOM PERCPU_PAGE_SIZE
12 # define THIS_CPU(var) (per_cpu__##var) /* use this to mark accesses to per-CPU variables... */
13 #else /* !__ASSEMBLY__ */
16 #include <linux/threads.h>
18 #ifdef HAVE_MODEL_SMALL_ATTRIBUTE
19 # define __SMALL_ADDR_AREA __attribute__((__model__ (__small__)))
21 # define __SMALL_ADDR_AREA
24 #define DECLARE_PER_CPU(type, name) \
25 extern __SMALL_ADDR_AREA __typeof__(type) per_cpu__##name
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
33 * Pretty much a literal copy of asm-generic/percpu.h, except that percpu_modcopy() is an
34 * external routine, to avoid include-hell.
38 extern unsigned long __per_cpu_offset
[NR_CPUS
];
40 /* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */
41 DECLARE_PER_CPU(unsigned long, local_per_cpu_offset
);
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)))
46 extern void percpu_modcopy(void *pcpudst
, const void *src
, unsigned long size
);
47 extern void setup_per_cpu_areas (void);
48 extern void *per_cpu_init(void);
52 #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var))
53 #define __get_cpu_var(var) per_cpu__##var
54 #define per_cpu_init() (__phys_per_cpu_start)
58 #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
59 #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
62 * Be extremely careful when taking the address of this variable! Due to virtual
63 * remapping, it is different from the canonical address returned by __get_cpu_var(var)!
64 * On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly
67 #define __ia64_per_cpu_var(var) (per_cpu__##var)
69 #endif /* !__ASSEMBLY__ */
71 #endif /* _ASM_IA64_PERCPU_H */