src/arch/x86/msr.cpp

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/***********************************************************
*PANALIX 0.06, (c) Adrian Panasiuk 2002-4                  *
*adek336[at]o2.pl, panalix.prv.pl                          *
*under GPLv3 license                                       *
*                                                          *
*panalix - small osdev project                             *
************************************************************
*       msr.cpp, version 1.1                               *
************************************************************
*                                                          *
*Machine specific registers on the ia32                    *
*                                                          *
*28'07'04- fork'd from branch 0.05j(1.1)                   *
*                                                          *
***********************************************************/

#include "src/common/shared.hpp"
#include "src/arch/x86/msr.hpp"


namespace Arch {
namespace x86 {

/*==========================IA-32 MACHINE SPECIFIC REGISTERS===============================*/

/*write a msr register*/
void wrmsr(uint32 reg, uint64 val)
 {
union
 {
        uint64 q;
        uint32 l[2];
 } uu;
        uu.q=val;
        asm volatile ("wrmsr" : : "c" (reg), "d" (uu.l[1]), "a" (uu.l[0]));
 }

/*read a msr register*/
uint64 rdmsr(uint32 reg)
 {
union
 {
        uint64 q;
        uint32 l[2];
 } uu;
        asm volatile ("rdmsr" : "=d" (uu.l[1]), "=a" (uu.l[0]) : "c" (reg));

        return uu.q;
 }


  };    /*namespace x86*/
 };     /*namespace Arch*/


/*****************************************************
*                                                    *
*panalix 0.05 (c) Adrian Panasiuk 2002-4             *
*adek336[at]o2.pl, panalix.prv.pl                    *
*                                                    *
******************************************************/

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