2005-04-16 16:20:36 -06:00
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#ifndef _ASM_GENERIC_PERCPU_H_
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#define _ASM_GENERIC_PERCPU_H_
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2009-04-21 16:00:29 -06:00
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2005-04-16 16:20:36 -06:00
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#include <linux/compiler.h>
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2007-05-02 11:27:10 -06:00
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#include <linux/threads.h>
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2009-04-21 16:00:29 -06:00
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#include <linux/percpu-defs.h>
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2008-01-30 05:32:52 -07:00
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2005-04-16 16:20:36 -06:00
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#ifdef CONFIG_SMP
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2008-01-30 05:32:52 -07:00
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/*
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* per_cpu_offset() is the offset that has to be added to a
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* percpu variable to get to the instance for a certain processor.
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*
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* Most arches use the __per_cpu_offset array for those offsets but
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* some arches have their own ways of determining the offset (x86_64, s390).
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*/
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#ifndef __per_cpu_offset
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2005-04-16 16:20:36 -06:00
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extern unsigned long __per_cpu_offset[NR_CPUS];
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2006-07-03 01:24:26 -06:00
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#define per_cpu_offset(x) (__per_cpu_offset[x])
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2008-01-30 05:32:52 -07:00
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#endif
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/*
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* Determine the offset for the currently active processor.
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* An arch may define __my_cpu_offset to provide a more effective
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* means of obtaining the offset to the per cpu variables of the
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* current processor.
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*/
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#ifndef __my_cpu_offset
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#define __my_cpu_offset per_cpu_offset(raw_smp_processor_id())
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2008-02-23 12:40:17 -07:00
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#endif
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#ifdef CONFIG_DEBUG_PREEMPT
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2008-01-30 05:32:52 -07:00
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#define my_cpu_offset per_cpu_offset(smp_processor_id())
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#else
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#define my_cpu_offset __my_cpu_offset
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#endif
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2014-06-17 17:12:34 -06:00
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/*
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* Arch may define arch_raw_cpu_ptr() to provide more efficient address
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* translations for raw_cpu_ptr().
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*/
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#ifndef arch_raw_cpu_ptr
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#define arch_raw_cpu_ptr(ptr) SHIFT_PERCPU_PTR(ptr, __my_cpu_offset)
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2010-09-09 10:17:26 -06:00
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#endif
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2014-06-17 17:12:34 -06:00
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2008-01-30 05:33:32 -07:00
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#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
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2008-01-30 05:32:52 -07:00
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extern void setup_per_cpu_areas(void);
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#endif
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2005-04-16 16:20:36 -06:00
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#endif /* SMP */
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2009-04-21 16:00:24 -06:00
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#ifndef PER_CPU_BASE_SECTION
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#ifdef CONFIG_SMP
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2010-02-19 17:03:43 -07:00
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#define PER_CPU_BASE_SECTION ".data..percpu"
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2009-04-21 16:00:24 -06:00
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#else
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#define PER_CPU_BASE_SECTION ".data"
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#endif
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#endif
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2008-01-30 05:32:52 -07:00
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#ifndef PER_CPU_ATTRIBUTES
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#define PER_CPU_ATTRIBUTES
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#endif
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2009-06-30 12:41:18 -06:00
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#ifndef PER_CPU_DEF_ATTRIBUTES
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#define PER_CPU_DEF_ATTRIBUTES
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#endif
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2005-04-16 16:20:36 -06:00
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#endif /* _ASM_GENERIC_PERCPU_H_ */
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