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

1 files changed, 24 insertions, 0 deletions

diff --git a/OvmfPkg/PlatformPei/Platform.c b/OvmfPkg/PlatformPei/Platform.c
index 833f62a..66bb098 100644
--- a/OvmfPkg/PlatformPei/Platform.c
+++ b/OvmfPkg/PlatformPei/Platform.c
@@ -31,6 +31,7 @@
 #include <Guid/MemoryTypeInformation.h>

 

 #include "Platform.h"

+#include "Cmos.h"

 

 EFI_MEMORY_TYPE_INFORMATION mDefaultMemoryTypeInformation[] = {

   { EfiACPIMemoryNVS,       0x004 },

@@ -200,6 +201,27 @@ ReserveEmuVariableNvStore (
 }

 

 

+VOID

+DebugDumpCmos (

+  VOID

+  )

+{

+  UINTN  Loop;

+

+  DEBUG ((EFI_D_INFO, "CMOS:\n"));

+

+  for (Loop = 0; Loop < 0x80; Loop++) {

+    if ((Loop % 0x10) == 0) {

+      DEBUG ((EFI_D_INFO, "%02x:", Loop));

+    }

+    DEBUG ((EFI_D_INFO, " %02x", CmosRead8 (Loop)));

+    if ((Loop % 0x10) == 0xf) {

+      DEBUG ((EFI_D_INFO, "\n"));

+    }

+  }

+}

+

+

 /**

   Perform Platform PEI initialization.

 

@@ -220,6 +242,8 @@ InitializePlatform (
 

   DEBUG ((EFI_D_ERROR, "Platform PEIM Loaded\n"));

 

+  DebugDumpCmos ();

+

   TopOfMemory = MemDetect ();

 

   ReserveEmuVariableNvStore ();