src/soc/intel/broadwell/tsc_freq.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <cpu/x86/msr.h>
   4 #include <cpu/x86/tsc.h>
   5 #include <soc/cpu.h>
   6 #include <soc/msr.h>
   7
   8 unsigned long tsc_freq_mhz(void)
   9 {
  10         msr_t platform_info;
  11
  12         platform_info = rdmsr(MSR_PLATFORM_INFO);
  13         return CPU_BCLK * ((platform_info.lo >> 8) & 0xff);
  14 }