Moved the MdePkg to OldMdePkg so that new code in MdePkg does not break existing...

[mirror_edk2.git] / OldMdePkg / Library / BaseLib / Ia32 / CpuIdEx.c

diff --git a/OldMdePkg/Library/BaseLib/Ia32/CpuIdEx.c b/OldMdePkg/Library/BaseLib/Ia32/CpuIdEx.c
new file mode 100644 (file)
index 0000000..8e475d8
--- /dev/null
+++ b/OldMdePkg/Library/BaseLib/Ia32/CpuIdEx.c
@@ -0,0 +1,50 @@
+/** @file\r
+  AsmCpuidEx function.\r
+\r
+  Copyright (c) 2006 - 2007, Intel Corporation<BR>\r
+  All rights reserved. This program and the accompanying materials\r
+  are licensed and made available under the terms and conditions of the BSD License\r
+  which accompanies this distribution.  The full text of the license may be found at\r
+  http://opensource.org/licenses/bsd-license.php\r
+\r
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+UINT32\r
+EFIAPI\r
+AsmCpuidEx (\r
+  IN      UINT32                    Index,\r
+  IN      UINT32                    SubIndex,\r
+  OUT     UINT32                    *RegisterEax,  OPTIONAL\r
+  OUT     UINT32                    *RegisterEbx,  OPTIONAL\r
+  OUT     UINT32                    *RegisterEcx,  OPTIONAL\r
+  OUT     UINT32                    *RegisterEdx   OPTIONAL\r
+  )\r
+{\r
+  _asm {\r
+    mov     eax, Index\r
+    mov     ecx, SubIndex\r
+    cpuid\r
+    push    ecx\r
+    mov     ecx, RegisterEax\r
+    jecxz   SkipEax\r
+    mov     [ecx], eax\r
+SkipEax:\r
+    mov     ecx, RegisterEbx\r
+    jecxz   SkipEbx\r
+    mov     [ecx], ebx\r
+SkipEbx:\r
+    pop     eax\r
+    mov     ecx, RegisterEcx\r
+    jecxz   SkipEcx\r
+    mov     [ecx], eax\r
+SkipEcx:\r
+    mov     ecx, RegisterEdx\r
+    jecxz   SkipEdx\r
+    mov     [ecx], edx\r
+SkipEdx:\r
+    mov     eax, Index\r
+  }\r
+}\r