diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/MdePkg/Library/BaseLib/X64/CpuIdEx.nasm | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/MdePkg/Library/BaseLib/X64/CpuIdEx.nasm')
| -rw-r--r-- | roms/edk2/MdePkg/Library/BaseLib/X64/CpuIdEx.nasm | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseLib/X64/CpuIdEx.nasm b/roms/edk2/MdePkg/Library/BaseLib/X64/CpuIdEx.nasm new file mode 100644 index 000000000..fd5caa328 --- /dev/null +++ b/roms/edk2/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
+
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