2015-05-13 03:19:47 +02:00
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/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2014 Google Inc.
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2015-05-13 03:23:27 +02:00
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* Copyright (C) 2015 Intel Corporation.
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2015-05-13 03:19:47 +02:00
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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2015-05-13 03:23:27 +02:00
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* Foundation, Inc.
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2015-05-13 03:19:47 +02:00
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*/
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#include <stdint.h>
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#include <cpu/x86/msr.h>
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#include <cpu/x86/tsc.h>
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#include <soc/cpu.h>
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#include <soc/msr.h>
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unsigned long tsc_freq_mhz(void)
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{
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msr_t platform_info;
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platform_info = rdmsr(MSR_PLATFORM_INFO);
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return CPU_BCLK * ((platform_info.lo >> 8) & 0xff);
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}
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