| Angel Pons | 80d9238 | 2020-04-05 15:47:00 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Mariusz Szafranski | a404133 | 2017-08-02 17:28:17 +0200 | [diff] [blame] | 2 | |
| 3 | #include <cpu/x86/msr.h> | ||||
| 4 | #include <cpu/x86/tsc.h> | ||||
| Mariusz Szafranski | a404133 | 2017-08-02 17:28:17 +0200 | [diff] [blame] | 5 | |
| 6 | #include <soc/cpu.h> | ||||
| 7 | #include <soc/msr.h> | ||||
| 8 | |||||
| 9 | unsigned long tsc_freq_mhz(void) | ||||
| 10 | { | ||||
| 11 | msr_t platform_info; | ||||
| 12 | |||||
| 13 | platform_info = rdmsr(MSR_PLATFORM_INFO); | ||||
| 14 | return CPU_BCLK * ((platform_info.lo >> 8) & 0xff); | ||||
| 15 | } | ||||