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 ;------------------------------------------------------------------------------ 37 AsmCpuid 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 60 AsmCpuid ENDP 61 62 END 63
