1 files changed, 68 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/CpuId.S b/MdePkg/Library/BaseLib/Ia32/CpuId.S
new file mode 100644
index 0000000000..2373ad1a8e
--- /dev/null
+++ b/MdePkg/Library/BaseLib/Ia32/CpuId.S
@@ -0,0 +1,68 @@
+//
+// Include common header file for this module.
+//
+#include "CommonHeader.h"
+
+#------------------------------------------------------------------------------
+#
+# Copyright (c) 2006, Intel Corporation
+# All rights reserved. This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution.  The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+# Module Name:
+#
+#   CpuId.Asm
+#
+# Abstract:
+#
+#   AsmCpuid function
+#
+# Notes:
+#
+#------------------------------------------------------------------------------
+
+.globl  ASM_PFX(AsmCpuid)
+
+#------------------------------------------------------------------------------
+#  VOID
+#  EFIAPI
+#  AsmCpuid (
+#    IN   UINT32  RegisterInEax,
+#    OUT  UINT32  *RegisterOutEax  OPTIONAL,
+#    OUT  UINT32  *RegisterOutEbx  OPTIONAL,
+#    OUT  UINT32  *RegisterOutEcx  OPTIONAL,
+#    OUT  UINT32  *RegisterOutEdx  OPTIONAL
+#    )
+#------------------------------------------------------------------------------
+ASM_PFX(AsmCpuid):
+    push    %ebx
+    push    %ebp
+    movl    %esp, %ebp
+    movl    12(%ebp), %eax
+    cpuid
+    push    %ecx
+    movl    16(%ebp), %ecx
+    jecxz   L1
+    movl    %eax, (%ecx)
+L1:
+    movl    20(%ebp), %ecx
+    jecxz   L2
+    movl    %ebx, (%ecx)
+L2:
+    movl    24(%ebp), %ecx
+    jecxz   L3
+    popl    (%ecx)
+L3:
+    movl    28(%ebp), %ecx
+    jecxz   L4
+    movl    %edx, (%ecx)
+L4:
+    movl    12(%ebp), %eax
+    leave
+    pop     %ebx
+    ret