1;------------------------------------------------------------------------------ 2; 3; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> 4; This program and the accompanying materials 5; are licensed and made available under the terms and conditions of the BSD License 6; which accompanies this distribution. The full text of the license may be found at 7; http://opensource.org/licenses/bsd-license.php. 8; 9; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11; 12; Module Name: 13; 14; CpuId.Asm 15; 16; Abstract: 17; 18; AsmCpuid function 19; 20; Notes: 21; 22;------------------------------------------------------------------------------ 23 24 .code 25 26;------------------------------------------------------------------------------ 27; VOID 28; EFIAPI 29; AsmCpuid ( 30; IN UINT32 RegisterInEax, 31; OUT UINT32 *RegisterOutEax OPTIONAL, 32; OUT UINT32 *RegisterOutEbx OPTIONAL, 33; OUT UINT32 *RegisterOutEcx OPTIONAL, 34; OUT UINT32 *RegisterOutEdx OPTIONAL 35; ) 36;------------------------------------------------------------------------------ 37AsmCpuid PROC USES rbx 38 mov eax, ecx 39 push rax ; save Index on stack 40 push rdx 41 cpuid 42 test r9, r9 43 jz @F 44 mov [r9], ecx 45@@: 46 pop rcx 47 jrcxz @F 48 mov [rcx], eax 49@@: 50 mov rcx, r8 51 jrcxz @F 52 mov [rcx], ebx 53@@: 54 mov rcx, [rsp + 38h] 55 jrcxz @F 56 mov [rcx], edx 57@@: 58 pop rax ; restore Index to rax as return value 59 ret 60AsmCpuid ENDP 61 62 END 63