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/*
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
*
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 _ARCH_MSR_H
#define _ARCH_MSR_H
static inline unsigned long long _rdmsr(unsigned int msr)
{
unsigned long long val;
asm volatile("rdmsr" : "=A" (val) : "c" (msr));
return val;
}
static inline void _wrmsr(unsigned int msr, unsigned long long val)
{
asm volatile("wrmsr" : : "c" (msr), "A"(val));
}
#define rdmsr(_m, _l, _h) \
do { \
unsigned long long _v = _rdmsr((_m)); \
(_l) = (unsigned int) _v; \
(_h) = (unsigned int) ((_v >> 32) & 0xFFFFFFFF); \
} while(0)
static inline void wrmsr(unsigned int msr, unsigned int lo, unsigned int hi)
{
unsigned long long val = (((unsigned long long) hi) << 32) | lo;
_wrmsr(msr, val);
}
#endif
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