diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/X64/CpuIdEx.nasm')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/X64/CpuIdEx.nasm | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/X64/CpuIdEx.nasm b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/X64/CpuIdEx.nasm new file mode 100644 index 00000000..66be3be9 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/X64/CpuIdEx.nasm @@ -0,0 +1,60 @@ +;------------------------------------------------------------------------------ +; +; 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 + |