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