| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2014 Google Inc. |
| * Copyright (C) 2015 Intel Corporation. |
| * |
| * 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; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <stdint.h> |
| #include <cpu/x86/msr.h> |
| #include <cpu/x86/tsc.h> |
| #include <soc/msr.h> |
| |
| unsigned long tsc_freq_mhz(void) |
| { |
| msr_t platform_info; |
| |
| platform_info = rdmsr(MSR_PLATFORM_INFO); |
| return CONFIG_CPU_BCLK_MHZ * ((platform_info.lo >> 8) & 0xff); |
| } |