1cd76c7513
. primary purpose is to synchronize with <ieeefp.h> which expects a fp_prec from sys/arch/x86/include/ieeefp.h
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
/* $NetBSD: cpu_msr.h,v 1.7 2009/10/05 23:59:31 rmind Exp $ */
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/*-
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* Copyright (c) 2007 Juan Romero Pardines.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _X86_CPU_MSR_H
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#define _X86_CPU_MSR_H
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#include <sys/param.h>
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#include <sys/types.h>
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#ifdef _KERNEL
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struct msr_rw_info {
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int msr_read;
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int msr_type;
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uint64_t msr_value;
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uint64_t msr_mask;
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};
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static inline void
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x86_msr_xcall(void *arg1, void *arg2)
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{
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struct msr_rw_info *msrdat = arg1;
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uint64_t msr = 0;
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KASSERT(msrdat->msr_type != 0);
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/* Read the MSR requested and apply the mask if defined. */
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if (msrdat->msr_read) {
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msr = rdmsr(msrdat->msr_type);
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if (msrdat->msr_mask) {
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msr &= ~msrdat->msr_mask;
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}
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}
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/* Assign (or extract, on read) the value and perform the write. */
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msr |= msrdat->msr_value;
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wrmsr(msrdat->msr_type, msr);
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}
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#endif /* ! _KERNEL */
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#endif /* ! _X86_CPU_MSR_H */
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