src/soc/intel/broadwell/cpu_info.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <arch/cpu.h>
  16 #include <cpu/x86/msr.h>
  17 #include <soc/cpu.h>
  18 #include <soc/msr.h>
  19 #include <soc/systemagent.h>
  20
  21 u32 cpu_family_model(void)
  22 {
  23         return cpuid_eax(1) & 0x0fff0ff0;
  24 }
  25
  26 u32 cpu_stepping(void)
  27 {
  28         return cpuid_eax(1) & 0xf;
  29 }
  30
  31 /* Dynamically determine if the part is ULT. */
  32 int cpu_is_ult(void)
  33 {
  34         static int ult = -1;
  35
  36         if (ult < 0) {
  37                 u32 fm = cpu_family_model();
  38                 if (fm == BROADWELL_FAMILY_ULT || fm == HASWELL_FAMILY_ULT)
  39                         ult = 1;
  40                 else
  41                         ult = 0;
  42         }
  43
  44         return ult;
  45 }