[deliverable/linux.git] / include / asm-ia64 / percpu.h

#ifndef _ASM_IA64_PERCPU_H
#define _ASM_IA64_PERCPU_H

/*
 * Copyright (C) 2002-2003 Hewlett-Packard Co
 *	David Mosberger-Tang <davidm@hpl.hp.com>
 */

#define PERCPU_ENOUGH_ROOM PERCPU_PAGE_SIZE

#ifdef __ASSEMBLY__
# define THIS_CPU(var)	(per_cpu__##var)  /* use this to mark accesses to per-CPU variables... */
#else /* !__ASSEMBLY__ */


#include <linux/threads.h>

#ifdef CONFIG_SMP

#ifdef HAVE_MODEL_SMALL_ATTRIBUTE
# define PER_CPU_ATTRIBUTES	__attribute__((__model__ (__small__)))
#endif

#define __my_cpu_offset	__ia64_per_cpu_var(local_per_cpu_offset)

extern void *per_cpu_init(void);

#else /* ! SMP */

#define PER_CPU_ATTRIBUTES	__attribute__((__section__(".data.percpu")))

#define per_cpu_init()				(__phys_per_cpu_start)

#endif	/* SMP */

/*
 * Be extremely careful when taking the address of this variable!  Due to virtual
 * remapping, it is different from the canonical address returned by __get_cpu_var(var)!
 * On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly
 * more efficient.
 */
#define __ia64_per_cpu_var(var)	per_cpu__##var

#include <asm-generic/percpu.h>

/* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */
DECLARE_PER_CPU(unsigned long, local_per_cpu_offset);

#endif /* !__ASSEMBLY__ */

#endif /* _ASM_IA64_PERCPU_H */
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
ab6e14b7 IM	18	#ifdef CONFIG_SMP
ab6e14b7 IM	19
1da177e4	20	#ifdef HAVE_MODEL_SMALL_ATTRIBUTE
5280e004	21	# define PER_CPU_ATTRIBUTES __attribute__((__model__ (__small__)))
1da177e4 LT	22	#endif
1da177e4 LT	23
05991bef	24	#define __my_cpu_offset __ia64_per_cpu_var(local_per_cpu_offset)
1da177e4	25
1da177e4 LT	26	extern void *per_cpu_init(void);
	27
	28	#else /* ! SMP */
	29
ab6e14b7 IM	30	#define PER_CPU_ATTRIBUTES __attribute__((__section__(".data.percpu")))
ab6e14b7 IM	31
1da177e4 LT	32	#define per_cpu_init() (__phys_per_cpu_start)
	33
	34	#endif /* SMP */
	35
1da177e4 LT	36	/*
	37	* Be extremely careful when taking the address of this variable! Due to virtual
	38	* remapping, it is different from the canonical address returned by __get_cpu_var(var)!
	39	* On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly
	40	* more efficient.
	41	*/
05991bef	42	#define __ia64_per_cpu_var(var) per_cpu__##var
	43
	44	#include <asm-generic/percpu.h>
	45
	46	/* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */
	47	DECLARE_PER_CPU(unsigned long, local_per_cpu_offset);
1da177e4 LT	48
	49	#endif /* !__ASSEMBLY__ */
	50
	51	#endif /* _ASM_IA64_PERCPU_H */