minix/sys/arch/x86/include/cpu_msr.h
Ben Gras 1cd76c7513 sys/arch/x86/include updates
. primary purpose is to synchronize with <ieeefp.h> which
	  expects a fp_prec from sys/arch/x86/include/ieeefp.h
2013-01-15 12:14:01 +00:00

64 lines
2.1 KiB
C

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