From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/asm-ia64/percpu.h | 72 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 include/asm-ia64/percpu.h (limited to 'include/asm-ia64/percpu.h') diff --git a/include/asm-ia64/percpu.h b/include/asm-ia64/percpu.h new file mode 100644 index 00000000000..1e87f19dad5 --- /dev/null +++ b/include/asm-ia64/percpu.h @@ -0,0 +1,72 @@ +#ifndef _ASM_IA64_PERCPU_H +#define _ASM_IA64_PERCPU_H + +/* + * Copyright (C) 2002-2003 Hewlett-Packard Co + * David Mosberger-Tang + */ + +#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 + +#include + +#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 + +/* + * 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]; + +/* 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))) + +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 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 */ -- cgit v1.2.3-18-g5258