59 lines
2.2 KiB
C
59 lines
2.2 KiB
C
/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2008 Advanced Micro Devices, Inc.
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _ARCH_MSR_H
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#define _ARCH_MSR_H
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static inline unsigned long long _rdmsr(unsigned int msr)
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{
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unsigned long long val;
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asm volatile("rdmsr" : "=A" (val) : "c" (msr));
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return val;
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}
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static inline void _wrmsr(unsigned int msr, unsigned long long val)
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{
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asm volatile("wrmsr" : : "c" (msr), "A"(val));
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}
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#define rdmsr(_m, _l, _h) \
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do { \
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unsigned long long _v = _rdmsr((_m)); \
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(_l) = (unsigned int) _v; \
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(_h) = (unsigned int) ((_v >> 32) & 0xFFFFFFFF); \
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} while(0)
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static inline void wrmsr(unsigned int msr, unsigned int lo, unsigned int hi)
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{
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unsigned long long val = (((unsigned long long) hi) << 32) | lo;
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_wrmsr(msr, val);
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}
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#endif
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