xref: /openbmc/linux/arch/x86/lib/cpu.c (revision 3381df09)
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);
39