;------------------------------------------------------------------------------ | |
; | |
; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> | |
; SPDX-License-Identifier: BSD-2-Clause-Patent | |
; | |
; Module Name: | |
; | |
; CpuIdEx.Asm | |
; | |
; Abstract: | |
; | |
; AsmCpuidEx function | |
; | |
; Notes: | |
; | |
;------------------------------------------------------------------------------ | |
DEFAULT REL | |
SECTION .text | |
;------------------------------------------------------------------------------ | |
; UINT32 | |
; EFIAPI | |
; AsmCpuidEx ( | |
; IN UINT32 RegisterInEax, | |
; IN UINT32 RegisterInEcx, | |
; OUT UINT32 *RegisterOutEax OPTIONAL, | |
; OUT UINT32 *RegisterOutEbx OPTIONAL, | |
; OUT UINT32 *RegisterOutEcx OPTIONAL, | |
; OUT UINT32 *RegisterOutEdx OPTIONAL | |
; ) | |
;------------------------------------------------------------------------------ | |
global ASM_PFX(AsmCpuidEx) | |
ASM_PFX(AsmCpuidEx): | |
push rbx | |
mov eax, ecx | |
mov ecx, edx | |
push rax ; save Index on stack | |
cpuid | |
mov r10, [rsp + 0x38] | |
test r10, r10 | |
jz .0 | |
mov [r10], ecx | |
.0: | |
mov rcx, r8 | |
jrcxz .1 | |
mov [rcx], eax | |
.1: | |
mov rcx, r9 | |
jrcxz .2 | |
mov [rcx], ebx | |
.2: | |
mov rcx, [rsp + 0x40] | |
jrcxz .3 | |
mov [rcx], edx | |
.3: | |
pop rax ; restore Index to rax as return value | |
pop rbx | |
ret | |