blob: b6320eda8fb3fa247967ace30391b89cef9b25b6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2015 Intel Corp.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <cpu/x86/msr.h>
#include <cpu/x86/tsc.h>
#include <soc/cpu.h>
unsigned long tsc_freq_mhz(void)
{
msr_t msr = rdmsr(MSR_PLATFORM_INFO);
return (BASE_CLOCK_MHZ * ((msr.lo >> 8) & 0xff));
}
|