OvmfPkg: Add DEBUG messages to dump the contents of CMOS

The contents of CMOS on boot can describe some aspects of
the system configuration.  For example, the size of memory
available to qemu/kvm.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11264 6f19259b-4bc3-4df7-8a09-765794883524

diff --git a/OvmfPkg/PlatformPei/Platform.c b/OvmfPkg/PlatformPei/Platform.c
index 833f62adffbe6ed2698fda14cedd772b6e7d9383..66bb0984c864e8c44538496367d9a05214d8625d 100644 (file)
--- a/OvmfPkg/PlatformPei/Platform.c
+++ b/OvmfPkg/PlatformPei/Platform.c
@@ -31,6 +31,7 @@
 #include <Guid/MemoryTypeInformation.h>\r
 \r
 #include "Platform.h"\r
+#include "Cmos.h"\r
 \r
 EFI_MEMORY_TYPE_INFORMATION mDefaultMemoryTypeInformation[] = {\r
   { EfiACPIMemoryNVS,       0x004 },\r
@@ -200,6 +201,27 @@ ReserveEmuVariableNvStore (
 }\r
 \r
 \r
+VOID\r
+DebugDumpCmos (\r
+  VOID\r
+  )\r
+{\r
+  UINTN  Loop;\r
+\r
+  DEBUG ((EFI_D_INFO, "CMOS:\n"));\r
+\r
+  for (Loop = 0; Loop < 0x80; Loop++) {\r
+    if ((Loop % 0x10) == 0) {\r
+      DEBUG ((EFI_D_INFO, "%02x:", Loop));\r
+    }\r
+    DEBUG ((EFI_D_INFO, " %02x", CmosRead8 (Loop)));\r
+    if ((Loop % 0x10) == 0xf) {\r
+      DEBUG ((EFI_D_INFO, "\n"));\r
+    }\r
+  }\r
+}\r
+\r
+\r
 /**\r
   Perform Platform PEI initialization.\r
 \r
@@ -220,6 +242,8 @@ InitializePlatform (
 \r
   DEBUG ((EFI_D_ERROR, "Platform PEIM Loaded\n"));\r
 \r
+  DebugDumpCmos ();\r
+\r
   TopOfMemory = MemDetect ();\r
 \r
   ReserveEmuVariableNvStore ();\r