Files
jsix/src/kernel/msr.cpp
F in Chat for Tabs 8f529046a9 [project] Lose the battle between tabs & spaces
I'm a tabs guy. I like tabs, it's an elegant way to represent
indentation instead of brute-forcing it. But I have to admit that the
world seems to be going towards spaces, and tooling tends not to play
nice with tabs. So here we go, changing the whole repo to spaces since
I'm getting tired of all the inconsistent formatting.
2021-08-01 17:46:16 -07:00

25 lines
499 B
C++

#include "msr.h"
msr
find_mtrr(msr type, unsigned index)
{
return static_cast<msr>(static_cast<uint32_t>(type) + (2 * index));
}
uint64_t
rdmsr(msr addr)
{
uint32_t low, high;
__asm__ __volatile__ ("rdmsr" : "=a"(low), "=d"(high) : "c"(addr));
return (static_cast<uint64_t>(high) << 32) | low;
}
void
wrmsr(msr addr, uint64_t value)
{
uint32_t low = value & 0xffffffff;
uint32_t high = value >> 32;
__asm__ __volatile__ ("wrmsr" :: "c"(addr), "a"(low), "d"(high));
}