37 lines
2.1 KiB
C
37 lines
2.1 KiB
C
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/****************************************************************************
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****************************************************************************
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***
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*** This header was automatically generated from a Linux kernel header
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*** of the same name, to make information necessary for userspace to
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*** call into the kernel available to libc. It contains only constants,
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*** structures, and macros generated from the original header, and thus,
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*** contains no copyrightable information.
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***
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****************************************************************************
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****************************************************************************/
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#ifndef __ARCH_I386_PERCPU__
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#define __ARCH_I386_PERCPU__
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#ifdef __ASSEMBLY__
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#define PER_CPU(var, reg) movl $per_cpu__##var, reg
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#define PER_CPU_VAR(var) per_cpu__##var
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#else
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#include <asm-generic/percpu.h>
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#define __percpu_seg ""
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#define percpu_to_op(op,var,val) do { typedef typeof(var) T__; if (0) { T__ tmp__; tmp__ = (val); } switch (sizeof(var)) { case 1: asm(op "b %1,"__percpu_seg"%0" : "+m" (var) :"ri" ((T__)val)); break; case 2: asm(op "w %1,"__percpu_seg"%0" : "+m" (var) :"ri" ((T__)val)); break; case 4: asm(op "l %1,"__percpu_seg"%0" : "+m" (var) :"ri" ((T__)val)); break; default: __bad_percpu_size(); } } while (0)
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#define percpu_from_op(op,var) ({ typeof(var) ret__; switch (sizeof(var)) { case 1: asm(op "b "__percpu_seg"%1,%0" : "=r" (ret__) : "m" (var)); break; case 2: asm(op "w "__percpu_seg"%1,%0" : "=r" (ret__) : "m" (var)); break; case 4: asm(op "l "__percpu_seg"%1,%0" : "=r" (ret__) : "m" (var)); break; default: __bad_percpu_size(); } ret__; })
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#define x86_read_percpu(var) percpu_from_op("mov", per_cpu__##var)
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#define x86_write_percpu(var,val) percpu_to_op("mov", per_cpu__##var, val)
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#define x86_add_percpu(var,val) percpu_to_op("add", per_cpu__##var, val)
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#define x86_sub_percpu(var,val) percpu_to_op("sub", per_cpu__##var, val)
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#define x86_or_percpu(var,val) percpu_to_op("or", per_cpu__##var, val)
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#endif
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#endif
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