1*49cdfc7eSAndroid Build Coastguard Worker /*
2*49cdfc7eSAndroid Build Coastguard Worker * Copyright (c) 2012-2013 The Chromium OS Authors. All rights reserved.
3*49cdfc7eSAndroid Build Coastguard Worker *
4*49cdfc7eSAndroid Build Coastguard Worker * Licensed under the BSD 3-clause.
5*49cdfc7eSAndroid Build Coastguard Worker */
6*49cdfc7eSAndroid Build Coastguard Worker
7*49cdfc7eSAndroid Build Coastguard Worker #ifndef __LTP_CPUID_H__
8*49cdfc7eSAndroid Build Coastguard Worker #define __LTP_CPUID_H__
9*49cdfc7eSAndroid Build Coastguard Worker
cpuid(unsigned int info,unsigned int * eax,unsigned int * ebx,unsigned int * ecx,unsigned int * edx)10*49cdfc7eSAndroid Build Coastguard Worker static inline void cpuid(unsigned int info, unsigned int *eax, unsigned int *ebx,
11*49cdfc7eSAndroid Build Coastguard Worker unsigned int *ecx, unsigned int *edx)
12*49cdfc7eSAndroid Build Coastguard Worker {
13*49cdfc7eSAndroid Build Coastguard Worker #if defined(__i386__) || defined(__x86_64__)
14*49cdfc7eSAndroid Build Coastguard Worker unsigned int _eax = info, _ebx, _ecx, _edx;
15*49cdfc7eSAndroid Build Coastguard Worker asm volatile(
16*49cdfc7eSAndroid Build Coastguard Worker # ifdef __i386__
17*49cdfc7eSAndroid Build Coastguard Worker "xchg %%ebx, %%esi;" /* save ebx (for PIC) */
18*49cdfc7eSAndroid Build Coastguard Worker "cpuid;"
19*49cdfc7eSAndroid Build Coastguard Worker "xchg %%esi, %%ebx;" /* restore ebx & pass to caller */
20*49cdfc7eSAndroid Build Coastguard Worker : "=S" (_ebx),
21*49cdfc7eSAndroid Build Coastguard Worker # else
22*49cdfc7eSAndroid Build Coastguard Worker "cpuid;"
23*49cdfc7eSAndroid Build Coastguard Worker : "=b" (_ebx),
24*49cdfc7eSAndroid Build Coastguard Worker # endif
25*49cdfc7eSAndroid Build Coastguard Worker "+a" (_eax), "=c" (_ecx), "=d" (_edx)
26*49cdfc7eSAndroid Build Coastguard Worker : /* inputs: eax is handled above */
27*49cdfc7eSAndroid Build Coastguard Worker );
28*49cdfc7eSAndroid Build Coastguard Worker if (eax) *eax = _eax;
29*49cdfc7eSAndroid Build Coastguard Worker if (ebx) *ebx = _ebx;
30*49cdfc7eSAndroid Build Coastguard Worker if (ecx) *ecx = _ecx;
31*49cdfc7eSAndroid Build Coastguard Worker if (edx) *edx = _edx;
32*49cdfc7eSAndroid Build Coastguard Worker #endif
33*49cdfc7eSAndroid Build Coastguard Worker }
34*49cdfc7eSAndroid Build Coastguard Worker
35*49cdfc7eSAndroid Build Coastguard Worker #endif
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