1 /*
2 *
3 * Copyright 2018 Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #ifndef _ARCH_CPUID_H
30 #define _ARCH_CPUID_H
31
32 #define cpuid(fn, eax, ebx, ecx, edx) \
33 asm("cpuid" : "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx) : "0"(fn))
34
35 #define _declare_cpuid(reg) \
36 static inline unsigned int cpuid_##reg(unsigned int fn) \
37 { \
38 unsigned int eax, ebx, ecx, edx; \
39 cpuid(fn, eax, ebx, ecx, edx); \
40 return reg; \
41 }
42
43 _declare_cpuid(eax)
_declare_cpuid(ebx)44 _declare_cpuid(ebx)
45 _declare_cpuid(ecx)
46 _declare_cpuid(edx)
47
48 #undef _declare_cpuid
49
50 #define cpuid_sub_leaf(fn, sub_leaf, eax, ebx, ecx, edx) \
51 asm("cpuid" : "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx) : "0"(fn), "1"(sub_leaf))
52
53 #define _declare_cpuid_sub_leaf(reg) \
54 static inline unsigned int cpuid_sub_leaf_##reg( \
55 unsigned int fn, unsigned int sub_leaf) \
56 { \
57 unsigned int eax, ebx, ecx, edx; \
58 cpuid_sub_leaf(fn, sub_leaf, eax, ebx, ecx, edx); \
59 return reg; \
60 }
61
62 _declare_cpuid_sub_leaf(eax)
63 _declare_cpuid_sub_leaf(ebx)
64 _declare_cpuid_sub_leaf(ecx)
65 _declare_cpuid_sub_leaf(edx)
66
67 #undef _declare_cpuid_sub_leaf
68
69 static inline unsigned int cpuid_max(void)
70 {
71 return cpuid_eax(0);
72 }
73
cpuid_family(void)74 static inline unsigned int cpuid_family(void)
75 {
76 const unsigned int eax = cpuid_eax(1);
77 return (eax & 0xff00000) >> (20 - 4) | (eax & 0xf00) >> 8;
78 }
79
cpuid_model(void)80 static inline unsigned int cpuid_model(void)
81 {
82 const unsigned int eax = cpuid_eax(1);
83 return (eax & 0xf0000) >> (16 - 4) | (eax & 0xf0) >> 4;
84 }
85
86 enum intel_fam6_model {
87 NEHALEM = 0x25,
88 SANDYBRIDGE = 0x2a,
89 IVYBRIDGE = 0x3a,
90 HASWELL = 0x3c,
91 BROADWELL_U = 0x3d,
92 HASWELL_U = 0x45,
93 HASWELL_GT3E = 0x46,
94 BROADWELL = 0x47,
95 SKYLAKE_U_Y = 0x4e,
96 APOLLOLAKE = 0x5c,
97 SKYLAKE_S_H = 0x5e,
98 KABYLAKE_U_Y = 0x8e,
99 KABYLAKE_S_H = 0x9e,
100 };
101
102 #endif
103