OvmfPkg: Create initial version of PlatformInitLib

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3863

There are 3 variants of PlatformPei in OvmfPkg:
 - OvmfPkg/PlatformPei
 - OvmfPkg/XenPlatformPei
 - OvmfPkg/Bhyve/PlatformPei/PlatformPei.inf
These PlatformPeis can share many common codes, such as
Cmos / Hob / Memory / Platform related functions. This commit
(and its following several patches) are to create a PlatformInitLib
which wraps the common code called in above PlatformPeis.

In this initial version of PlatformInitLib, below Cmos related functions
are introduced:
 - PlatformCmosRead8
 - PlatformCmosWrite8
 - PlatformDebugDumpCmos

They correspond to the functions in OvmfPkg/PlatformPei:
 - CmosRead8
 - CmosWrite8
 - DebugDumpCmos

Considering this PlatformInitLib will be used in SEC phase, global
variables and dynamic PCDs are avoided. We use PlatformInfoHob
to exchange information between functions.

EFI_HOB_PLATFORM_INFO is the data struct which contains the platform
information, such as HostBridgeDevId, BootMode, S3Supported,
SmmSmramRequire, etc.

After PlatformInitLib is created, OvmfPkg/PlatformPei is refactored
with this library.

Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>

1 files changed, 4 insertions, 25 deletions

diff --git a/OvmfPkg/PlatformPei/Platform.c b/OvmfPkg/PlatformPei/Platform.c
index d0323c6451..5948917864 100644
--- a/OvmfPkg/PlatformPei/Platform.c
+++ b/OvmfPkg/PlatformPei/Platform.c
@@ -36,10 +36,10 @@
 #include <IndustryStandard/Pci22.h>

 #include <IndustryStandard/Q35MchIch9.h>

 #include <IndustryStandard/QemuCpuHotplug.h>

+#include <Library/PlatformInitLib.h>

 #include <OvmfPlatforms.h>

 

 #include "Platform.h"

-#include "Cmos.h"

 

 EFI_PEI_PPI_DESCRIPTOR  mPpiBootMode[] = {

   {

@@ -505,11 +505,11 @@ BootModeInitialization (
 {

   EFI_STATUS  Status;

 

-  if (CmosRead8 (0xF) == 0xFE) {

+  if (PlatformCmosRead8 (0xF) == 0xFE) {

     mBootMode = BOOT_ON_S3_RESUME;

   }

 

-  CmosWrite8 (0xF, 0x00);

+  PlatformCmosWrite8 (0xF, 0x00);

 

   Status = PeiServicesSetBootMode (mBootMode);

   ASSERT_EFI_ERROR (Status);

@@ -547,27 +547,6 @@ ReserveEmuVariableNvStore (
 }

 

 VOID

-DebugDumpCmos (

-  VOID

-  )

-{

-  UINT32  Loop;

-

-  DEBUG ((DEBUG_INFO, "CMOS:\n"));

-

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

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

-      DEBUG ((DEBUG_INFO, "%02x:", Loop));

-    }

-

-    DEBUG ((DEBUG_INFO, " %02x", CmosRead8 (Loop)));

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

-      DEBUG ((DEBUG_INFO, "\n"));

-    }

-  }

-}

-

-VOID

 S3Verification (

   VOID

   )

@@ -810,7 +789,7 @@ InitializePlatform (
 

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

 

-  DebugDumpCmos ();

+  PlatformDebugDumpCmos ();

 

   if (QemuFwCfgS3Enabled ()) {

     DEBUG ((DEBUG_INFO, "S3 support was detected on QEMU\n"));