[PATCH 6/6] UefiCpuPkg PiSmmCpuDxeSmm: Use new EfiFindAcpiTableBySignature()

[Star Zeng <star.zeng@intel.com>]

https://bugzilla.tianocore.org/show_bug.cgi?id=967
Request to add a library function for GetAcpiTable() in order
to get ACPI table using signature as input.

After evaluation, we found there are many duplicated code to
find ACPI table by signature in different modules.

This patch updates PiSmmCpuDxeSmm to use new
EfiFindAcpiTableBySignature() and remove the duplicated code.

Cc: Younas khan <pmdyounaskhan786@gmail.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
---
 UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf   |  4 +-
 UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c         | 84 ++------------------------
 UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfileInternal.h |  3 +-
 3 files changed, 6 insertions(+), 85 deletions(-)

diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf
index a7fb7b0b1482..0fdc1b134ea3 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf
@@ -4,7 +4,7 @@
 # This SMM driver performs SMM initialization, deploy SMM Entry Vector,
 # provides CPU specific services in SMM.
 #
-# Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
 # Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
 #
 # This program and the accompanying materials
@@ -114,8 +114,6 @@ [Protocols]
 [Guids]
   gEfiAcpiVariableGuid                     ## SOMETIMES_CONSUMES ## HOB # it is used for S3 boot.
   gEfiGlobalVariableGuid                   ## SOMETIMES_PRODUCES ## Variable:L"SmmProfileData"
-  gEfiAcpi20TableGuid                      ## SOMETIMES_CONSUMES ## SystemTable
-  gEfiAcpi10TableGuid                      ## SOMETIMES_CONSUMES ## SystemTable
   gEdkiiPiSmmMemoryAttributesTableGuid     ## CONSUMES ## SystemTable
   gEfiMemoryAttributesTableGuid            ## CONSUMES ## SystemTable
 
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c
index a743cf64f907..df643b72c517 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c
@@ -1,7 +1,7 @@
 /** @file
 Enable SMM profile.
 
-Copyright (c) 2012 - 2017, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2012 - 2018, Intel Corporation. All rights reserved.<BR>
 Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
 
 This program and the accompanying materials
@@ -726,84 +726,6 @@ InitPaging (
 }
 
 /**
-  To find FADT in ACPI tables.
-
-  @param AcpiTableGuid   The GUID used to find ACPI table in UEFI ConfigurationTable.
-
-  @return  FADT table pointer.
-**/
-EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE  *
-FindAcpiFadtTableByAcpiGuid (
-  IN EFI_GUID  *AcpiTableGuid
-  )
-{
-  EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER  *Rsdp;
-  EFI_ACPI_DESCRIPTION_HEADER                   *Rsdt;
-  EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE     *Fadt;
-  UINTN                                         Index;
-  UINT32                                        Data32;
-  Rsdp  = NULL;
-  Rsdt  = NULL;
-  Fadt  = NULL;
-  //
-  // found ACPI table RSD_PTR from system table
-  //
-  for (Index = 0; Index < gST->NumberOfTableEntries; Index++) {
-    if (CompareGuid (&(gST->ConfigurationTable[Index].VendorGuid), AcpiTableGuid)) {
-      //
-      // A match was found.
-      //
-      Rsdp = gST->ConfigurationTable[Index].VendorTable;
-      break;
-    }
-  }
-
-  if (Rsdp == NULL) {
-    return NULL;
-  }
-
-  Rsdt = (EFI_ACPI_DESCRIPTION_HEADER *)(UINTN) Rsdp->RsdtAddress;
-  if (Rsdt == NULL || Rsdt->Signature != EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_TABLE_SIGNATURE) {
-    return NULL;
-  }
-
-  for (Index = sizeof (EFI_ACPI_DESCRIPTION_HEADER); Index < Rsdt->Length; Index = Index + sizeof (UINT32)) {
-
-    Data32  = *(UINT32 *) ((UINT8 *) Rsdt + Index);
-    Fadt    = (EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *) (UINT32 *) (UINTN) Data32;
-    if (Fadt->Header.Signature == EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE_SIGNATURE) {
-      break;
-    }
-  }
-
-  if (Fadt == NULL || Fadt->Header.Signature != EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE_SIGNATURE) {
-    return NULL;
-  }
-
-  return Fadt;
-}
-
-/**
-  To find FADT in ACPI tables.
-
-  @return  FADT table pointer.
-**/
-EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE  *
-FindAcpiFadtTable (
-  VOID
-  )
-{
-  EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt;
-
-  Fadt = FindAcpiFadtTableByAcpiGuid (&gEfiAcpi20TableGuid);
-  if (Fadt != NULL) {
-    return Fadt;
-  }
-
-  return FindAcpiFadtTableByAcpiGuid (&gEfiAcpi10TableGuid);
-}
-
-/**
   To get system port address of the SMI Command Port in FADT table.
 
 **/
@@ -814,7 +736,9 @@ GetSmiCommandPort (
 {
   EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt;
 
-  Fadt = FindAcpiFadtTable ();
+  Fadt = (EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *) EfiFindAcpiTableBySignature (
+                                                         EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE_SIGNATURE
+                                                         );
   ASSERT (Fadt != NULL);
 
   mSmiCommandPort = Fadt->SmiCmd;
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfileInternal.h b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfileInternal.h
index bacb2f8ad32c..f93e90c143d2 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfileInternal.h
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfileInternal.h
@@ -1,7 +1,7 @@
 /** @file
 SMM profile internal header file.
 
-Copyright (c) 2012 - 2017, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2012 - 2018, Intel Corporation. All rights reserved.<BR>
 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
@@ -16,7 +16,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #define _SMM_PROFILE_INTERNAL_H_
 
 #include <Guid/GlobalVariable.h>
-#include <Guid/Acpi.h>
 #include <Protocol/SmmReadyToLock.h>
 #include <Library/UefiRuntimeServicesTableLib.h>
 #include <Library/DxeServicesTableLib.h>
-- 
2.7.0.windows.1