arch/x86/lib/cpu.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 #include <linux/types.h>
   3 #include <linux/export.h>
   4 #include <asm/cpu.h>
   5
   6 unsigned int x86_family(unsigned int sig)
   7 {
   8         unsigned int x86;
   9
  10         x86 = (sig >> 8) & 0xf;
  11
  12         if (x86 == 0xf)
  13                 x86 += (sig >> 20) & 0xff;
  14
  15         return x86;
  16 }
  17 EXPORT_SYMBOL_GPL(x86_family);
  18
  19 unsigned int x86_model(unsigned int sig)
  20 {
  21         unsigned int fam, model;
  22
  23         fam = x86_family(sig);
  24
  25         model = (sig >> 4) & 0xf;
  26
  27         if (fam >= 0x6)
  28                 model += ((sig >> 16) & 0xf) << 4;
  29
  30         return model;
  31 }
  32 EXPORT_SYMBOL_GPL(x86_model);
  33
  34 unsigned int x86_stepping(unsigned int sig)
  35 {
  36         return sig & 0xf;
  37 }
  38 EXPORT_SYMBOL_GPL(x86_stepping);