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1 /*===---- cpuid.h - X86 cpu model detection --------------------------------===
2  *
3  * Permission is hereby granted, free of charge, to any person obtaining a copy
4  * of this software and associated documentation files (the "Software"), to deal
5  * in the Software without restriction, including without limitation the rights
6  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7  * copies of the Software, and to permit persons to whom the Software is
8  * furnished to do so, subject to the following conditions:
9  *
10  * The above copyright notice and this permission notice shall be included in
11  * all copies or substantial portions of the Software.
12  *
13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
19  * THE SOFTWARE.
20  *
21  *===-----------------------------------------------------------------------===
22  */
23 
24 #if !(__x86_64__ || __i386__)
25 #error this header is for x86 only
26 #endif
27 
28 /* Responses identification request with %eax 0 */
29 /* AMD:     "AuthenticAMD" */
30 #define signature_AMD_ebx 0x68747541
31 #define signature_AMD_edx 0x69746e65
32 #define signature_AMD_ecx 0x444d4163
33 /* CENTAUR: "CentaurHauls" */
34 #define signature_CENTAUR_ebx 0x746e6543
35 #define signature_CENTAUR_edx 0x48727561
36 #define signature_CENTAUR_ecx 0x736c7561
37 /* CYRIX:   "CyrixInstead" */
38 #define signature_CYRIX_ebx 0x69727943
39 #define signature_CYRIX_edx 0x736e4978
40 #define signature_CYRIX_ecx 0x64616574
41 /* INTEL:   "GenuineIntel" */
42 #define signature_INTEL_ebx 0x756e6547
43 #define signature_INTEL_edx 0x49656e69
44 #define signature_INTEL_ecx 0x6c65746e
45 /* TM1:     "TransmetaCPU" */
46 #define signature_TM1_ebx 0x6e617254
47 #define signature_TM1_edx 0x74656d73
48 #define signature_TM1_ecx 0x55504361
49 /* TM2:     "GenuineTMx86" */
50 #define signature_TM2_ebx 0x756e6547
51 #define signature_TM2_edx 0x54656e69
52 #define signature_TM2_ecx 0x3638784d
53 /* NSC:     "Geode by NSC" */
54 #define signature_NSC_ebx 0x646f6547
55 #define signature_NSC_edx 0x43534e20
56 #define signature_NSC_ecx 0x79622065
57 /* NEXGEN:  "NexGenDriven" */
58 #define signature_NEXGEN_ebx 0x4778654e
59 #define signature_NEXGEN_edx 0x72446e65
60 #define signature_NEXGEN_ecx 0x6e657669
61 /* RISE:    "RiseRiseRise" */
62 #define signature_RISE_ebx 0x65736952
63 #define signature_RISE_edx 0x65736952
64 #define signature_RISE_ecx 0x65736952
65 /* SIS:     "SiS SiS SiS " */
66 #define signature_SIS_ebx 0x20536953
67 #define signature_SIS_edx 0x20536953
68 #define signature_SIS_ecx 0x20536953
69 /* UMC:     "UMC UMC UMC " */
70 #define signature_UMC_ebx 0x20434d55
71 #define signature_UMC_edx 0x20434d55
72 #define signature_UMC_ecx 0x20434d55
73 /* VIA:     "VIA VIA VIA " */
74 #define signature_VIA_ebx 0x20414956
75 #define signature_VIA_edx 0x20414956
76 #define signature_VIA_ecx 0x20414956
77 /* VORTEX:  "Vortex86 SoC" */
78 #define signature_VORTEX_ebx 0x74726f56
79 #define signature_VORTEX_edx 0x36387865
80 #define signature_VORTEX_ecx 0x436f5320
81 
82 /* Features in %ecx for level 1 */
83 #define bit_SSE3        0x00000001
84 #define bit_PCLMULQDQ   0x00000002
85 #define bit_DTES64      0x00000004
86 #define bit_MONITOR     0x00000008
87 #define bit_DSCPL       0x00000010
88 #define bit_VMX         0x00000020
89 #define bit_SMX         0x00000040
90 #define bit_EIST        0x00000080
91 #define bit_TM2         0x00000100
92 #define bit_SSSE3       0x00000200
93 #define bit_CNXTID      0x00000400
94 #define bit_FMA         0x00001000
95 #define bit_CMPXCHG16B  0x00002000
96 #define bit_xTPR        0x00004000
97 #define bit_PDCM        0x00008000
98 #define bit_PCID        0x00020000
99 #define bit_DCA         0x00040000
100 #define bit_SSE41       0x00080000
101 #define bit_SSE42       0x00100000
102 #define bit_x2APIC      0x00200000
103 #define bit_MOVBE       0x00400000
104 #define bit_POPCNT      0x00800000
105 #define bit_TSCDeadline 0x01000000
106 #define bit_AESNI       0x02000000
107 #define bit_XSAVE       0x04000000
108 #define bit_OSXSAVE     0x08000000
109 #define bit_AVX         0x10000000
110 #define bit_RDRND       0x40000000
111 
112 /* Features in %edx for level 1 */
113 #define bit_FPU         0x00000001
114 #define bit_VME         0x00000002
115 #define bit_DE          0x00000004
116 #define bit_PSE         0x00000008
117 #define bit_TSC         0x00000010
118 #define bit_MSR         0x00000020
119 #define bit_PAE         0x00000040
120 #define bit_MCE         0x00000080
121 #define bit_CX8         0x00000100
122 #define bit_APIC        0x00000200
123 #define bit_SEP         0x00000800
124 #define bit_MTRR        0x00001000
125 #define bit_PGE         0x00002000
126 #define bit_MCA         0x00004000
127 #define bit_CMOV        0x00008000
128 #define bit_PAT         0x00010000
129 #define bit_PSE36       0x00020000
130 #define bit_PSN         0x00040000
131 #define bit_CLFSH       0x00080000
132 #define bit_DS          0x00200000
133 #define bit_ACPI        0x00400000
134 #define bit_MMX         0x00800000
135 #define bit_FXSR        0x01000000
136 #define bit_FXSAVE      bit_FXSR    /* for gcc compat */
137 #define bit_SSE         0x02000000
138 #define bit_SSE2        0x04000000
139 #define bit_SS          0x08000000
140 #define bit_HTT         0x10000000
141 #define bit_TM          0x20000000
142 #define bit_PBE         0x80000000
143 
144 /* Features in %ebx for level 7 sub-leaf 0 */
145 #define bit_FSGSBASE    0x00000001
146 #define bit_SMEP        0x00000080
147 #define bit_ENH_MOVSB   0x00000200
148 
149 #if __i386__
150 #define __cpuid(__level, __eax, __ebx, __ecx, __edx) \
151     __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \
152                   : "0"(__level))
153 
154 #define __cpuid_count(__level, __count, __eax, __ebx, __ecx, __edx) \
155     __asm("cpuid" : "=a"(__eax), "=b" (__ebx), "=c"(__ecx), "=d"(__edx) \
156                   : "0"(__level), "2"(__count))
157 #else
158 /* x86-64 uses %rbx as the base register, so preserve it. */
159 #define __cpuid(__level, __eax, __ebx, __ecx, __edx) \
160     __asm("  xchgq  %%rbx,%q1\n" \
161           "  cpuid\n" \
162           "  xchgq  %%rbx,%q1" \
163         : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \
164         : "0"(__level))
165 
166 #define __cpuid_count(__level, __count, __eax, __ebx, __ecx, __edx) \
167     __asm("  xchgq  %%rbx,%q1\n" \
168           "  cpuid\n" \
169           "  xchgq  %%rbx,%q1" \
170         : "=a"(__eax), "=r" (__ebx), "=c"(__ecx), "=d"(__edx) \
171         : "0"(__level), "2"(__count))
172 #endif
173 
__get_cpuid(unsigned int __level,unsigned int * __eax,unsigned int * __ebx,unsigned int * __ecx,unsigned int * __edx)174 static __inline int __get_cpuid (unsigned int __level, unsigned int *__eax,
175                                  unsigned int *__ebx, unsigned int *__ecx,
176                                  unsigned int *__edx) {
177     __cpuid(__level, *__eax, *__ebx, *__ecx, *__edx);
178     return 1;
179 }
180 
__get_cpuid_max(unsigned int __level,unsigned int * __sig)181 static __inline int __get_cpuid_max (unsigned int __level, unsigned int *__sig)
182 {
183     unsigned int __eax, __ebx, __ecx, __edx;
184 #if __i386__
185     int __cpuid_supported;
186 
187     __asm("  pushfl\n"
188           "  popl   %%eax\n"
189           "  movl   %%eax,%%ecx\n"
190           "  xorl   $0x00200000,%%eax\n"
191           "  pushl  %%eax\n"
192           "  popfl\n"
193           "  pushfl\n"
194           "  popl   %%eax\n"
195           "  movl   $0,%0\n"
196           "  cmpl   %%eax,%%ecx\n"
197           "  je     1f\n"
198           "  movl   $1,%0\n"
199           "1:"
200         : "=r" (__cpuid_supported) : : "eax", "ecx");
201     if (!__cpuid_supported)
202         return 0;
203 #endif
204 
205     __cpuid(__level, __eax, __ebx, __ecx, __edx);
206     if (__sig)
207         *__sig = __ebx;
208     return __eax;
209 }
210