#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 HAVE_MODEL_SMALL_ATTRIBUTE # define __SMALL_ADDR_AREA __attribute__((__model__ (__small__))) #else # define __SMALL_ADDR_AREA #endif #define DECLARE_PER_CPU(type, name) \ extern __SMALL_ADDR_AREA __typeof__(type) per_cpu__##name /* Separate out the type, so (int[3], foo) works. */ #define DEFINE_PER_CPU(type, name) \ __attribute__((__section__(".data.percpu"))) \ __SMALL_ADDR_AREA __typeof__(type) per_cpu__##name #ifdef CONFIG_SMP #define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \ __attribute__((__section__(".data.percpu.shared_aligned"))) \ __SMALL_ADDR_AREA __typeof__(type) per_cpu__##name \ ____cacheline_aligned_in_smp #else #define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \ DEFINE_PER_CPU(type, name) #endif /* * Pretty much a literal copy of asm-generic/percpu.h, except that percpu_modcopy() is an * external routine, to avoid include-hell. */ #ifdef CONFIG_SMP extern unsigned long __per_cpu_offset[NR_CPUS]; #define per_cpu_offset(x) (__per_cpu_offset(x)) /* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */ DECLARE_PER_CPU(unsigned long, local_per_cpu_offset); #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu])) #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset))) #define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset))) extern void percpu_modcopy(void *pcpudst, const void *src, unsigned long size); extern void setup_per_cpu_areas (void); extern void *per_cpu_init(void); #else /* ! SMP */ #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var)) #define __get_cpu_var(var) per_cpu__##var #define __raw_get_cpu_var(var) per_cpu__##var #define per_cpu_init() (__phys_per_cpu_start) #endif /* SMP */ #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var) #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var) /* * 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) #endif /* !__ASSEMBLY__ */ #endif /* _ASM_IA64_PERCPU_H */