From af1a266670d040d2f4083ff309d732d648afba2a Mon Sep 17 00:00:00 2001
From: Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com>
Date: Tue, 10 Oct 2023 14:33:42 +0000
Subject: Add submodule dependency files

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
---
 roms/edk2/MdePkg/Library/BaseLib/Ia32/CpuId.c | 68 +++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 roms/edk2/MdePkg/Library/BaseLib/Ia32/CpuId.c

(limited to 'roms/edk2/MdePkg/Library/BaseLib/Ia32/CpuId.c')

diff --git a/roms/edk2/MdePkg/Library/BaseLib/Ia32/CpuId.c b/roms/edk2/MdePkg/Library/BaseLib/Ia32/CpuId.c
new file mode 100644
index 000000000..bcb0fa78f
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/BaseLib/Ia32/CpuId.c
@@ -0,0 +1,68 @@
+/** @file
+  AsmCpuid function.
+
+  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+/**
+  Retrieves CPUID information.
+
+  Executes the CPUID instruction with EAX set to the value specified by Index.
+  This function always returns Index.
+  If Eax is not NULL, then the value of EAX after CPUID is returned in Eax.
+  If Ebx is not NULL, then the value of EBX after CPUID is returned in Ebx.
+  If Ecx is not NULL, then the value of ECX after CPUID is returned in Ecx.
+  If Edx is not NULL, then the value of EDX after CPUID is returned in Edx.
+  This function is only available on IA-32 and x64.
+
+  @param  Index         The 32-bit value to load into EAX prior to invoking the CPUID
+                        instruction.
+  @param  RegisterEax   A pointer to the 32-bit EAX value returned by the CPUID
+                        instruction. This is an optional parameter that may be NULL.
+  @param  RegisterEbx   A pointer to the 32-bit EBX value returned by the CPUID
+                        instruction. This is an optional parameter that may be NULL.
+  @param  RegisterEcx   A pointer to the 32-bit ECX value returned by the CPUID
+                        instruction. This is an optional parameter that may be NULL.
+  @param  RegisterEdx   A pointer to the 32-bit EDX value returned by the CPUID
+                        instruction. This is an optional parameter that may be NULL.
+
+  @return Index.
+
+**/
+UINT32
+EFIAPI
+AsmCpuid (
+  IN      UINT32                    Index,
+  OUT     UINT32                    *RegisterEax,  OPTIONAL
+  OUT     UINT32                    *RegisterEbx,  OPTIONAL
+  OUT     UINT32                    *RegisterEcx,  OPTIONAL
+  OUT     UINT32                    *RegisterEdx   OPTIONAL
+  )
+{
+  _asm {
+    mov     eax, Index
+    cpuid
+    push    ecx
+    mov     ecx, RegisterEax
+    jecxz   SkipEax
+    mov     [ecx], eax
+SkipEax:
+    mov     ecx, RegisterEbx
+    jecxz   SkipEbx
+    mov     [ecx], ebx
+SkipEbx:
+    pop     eax
+    mov     ecx, RegisterEcx
+    jecxz   SkipEcx
+    mov     [ecx], eax
+SkipEcx:
+    mov     ecx, RegisterEdx
+    jecxz   SkipEdx
+    mov     [ecx], edx
+SkipEdx:
+    mov     eax, Index
+  }
+}
+
-- 
cgit