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author | Thomas Gleixner <tglx@linutronix.de> | 2007-10-11 13:20:03 +0400 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2007-10-11 13:20:03 +0400 |
commit | 96a388de5dc53a8b234b3fd41f3ae2cedc9ffd42 (patch) | |
tree | d947a467aa2da3140279617bc4b9b101640d7bf4 /include/asm-x86/percpu_64.h | |
parent | 27bd0c955648646abf2a353a8371d28c37bcd982 (diff) | |
download | linux-96a388de5dc53a8b234b3fd41f3ae2cedc9ffd42.tar.xz |
i386/x86_64: move headers to include/asm-x86
Move the headers to include/asm-x86 and fixup the
header install make rules
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-x86/percpu_64.h')
-rw-r--r-- | include/asm-x86/percpu_64.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/include/asm-x86/percpu_64.h b/include/asm-x86/percpu_64.h new file mode 100644 index 000000000000..5abd48270101 --- /dev/null +++ b/include/asm-x86/percpu_64.h @@ -0,0 +1,68 @@ +#ifndef _ASM_X8664_PERCPU_H_ +#define _ASM_X8664_PERCPU_H_ +#include <linux/compiler.h> + +/* Same as asm-generic/percpu.h, except that we store the per cpu offset + in the PDA. Longer term the PDA and every per cpu variable + should be just put into a single section and referenced directly + from %gs */ + +#ifdef CONFIG_SMP + +#include <asm/pda.h> + +#define __per_cpu_offset(cpu) (cpu_pda(cpu)->data_offset) +#define __my_cpu_offset() read_pda(data_offset) + +#define per_cpu_offset(x) (__per_cpu_offset(x)) + +/* Separate out the type, so (int[3], foo) works. */ +#define DEFINE_PER_CPU(type, name) \ + __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name + +#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \ + __attribute__((__section__(".data.percpu.shared_aligned"))) \ + __typeof__(type) per_cpu__##name \ + ____cacheline_internodealigned_in_smp + +/* var is in discarded region: offset to particular copy we want */ +#define per_cpu(var, cpu) (*({ \ + extern int simple_identifier_##var(void); \ + RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)); })) +#define __get_cpu_var(var) (*({ \ + extern int simple_identifier_##var(void); \ + RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()); })) +#define __raw_get_cpu_var(var) (*({ \ + extern int simple_identifier_##var(void); \ + RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()); })) + +/* A macro to avoid #include hell... */ +#define percpu_modcopy(pcpudst, src, size) \ +do { \ + unsigned int __i; \ + for_each_possible_cpu(__i) \ + memcpy((pcpudst)+__per_cpu_offset(__i), \ + (src), (size)); \ +} while (0) + +extern void setup_per_cpu_areas(void); + +#else /* ! SMP */ + +#define DEFINE_PER_CPU(type, name) \ + __typeof__(type) per_cpu__##name +#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \ + DEFINE_PER_CPU(type, name) + +#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 + +#endif /* SMP */ + +#define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name + +#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var) +#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var) + +#endif /* _ASM_X8664_PERCPU_H_ */ |