[PATCH 5/6] ShellPkg DpDynamicCommand: 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 DpDynamicCommand 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: Dandan Bi <dandan.bi@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
---
 ShellPkg/DynamicCommand/DpDynamicCommand/Dp.c      | 136 +--------------------
 ShellPkg/DynamicCommand/DpDynamicCommand/Dp.h      |   1 -
 ShellPkg/DynamicCommand/DpDynamicCommand/Dp.uni    |   1 -
 ShellPkg/DynamicCommand/DpDynamicCommand/DpApp.inf |   2 -
 .../DpDynamicCommand/DpDynamicCommand.inf          |   2 -
 5 files changed, 3 insertions(+), 139 deletions(-)

diff --git a/ShellPkg/DynamicCommand/DpDynamicCommand/Dp.c b/ShellPkg/DynamicCommand/DpDynamicCommand/Dp.c
index 2c094b63c94a..3b9549c2be8e 100644
--- a/ShellPkg/DynamicCommand/DpDynamicCommand/Dp.c
+++ b/ShellPkg/DynamicCommand/DpDynamicCommand/Dp.c
@@ -118,116 +118,6 @@ DumpStatistics( void )
 }
 
 /**
-  This function scan ACPI table in RSDT.
-
-  @param  Rsdt        ACPI RSDT
-  @param  Signature   ACPI table signature
-
-  @return ACPI table
-**/
-VOID *
-ScanTableInRSDT (
-  IN RSDT_TABLE                   *Rsdt,
-  IN UINT32                       Signature
-  )
-{
-  UINTN                         Index;
-  UINT32                        EntryCount;
-  UINT32                        *EntryPtr;
-  EFI_ACPI_DESCRIPTION_HEADER   *Table;
-
-  EntryCount = (Rsdt->Header.Length - sizeof (EFI_ACPI_DESCRIPTION_HEADER)) / sizeof(UINT32);
-
-  EntryPtr = &Rsdt->Entry;
-  for (Index = 0; Index < EntryCount; Index ++, EntryPtr ++) {
-    Table = (EFI_ACPI_DESCRIPTION_HEADER*)((UINTN)(*EntryPtr));
-    if (Table->Signature == Signature) {
-      return Table;
-    }
-  }
-
-  return NULL;
-}
-
-/**
-  This function scan ACPI table in XSDT.
-
-  @param  Xsdt       ACPI XSDT
-  @param  Signature  ACPI table signature
-
-  @return ACPI table
-**/
-VOID *
-ScanTableInXSDT (
-  IN XSDT_TABLE                   *Xsdt,
-  IN UINT32                       Signature
-  )
-{
-  UINTN                        Index;
-  UINT32                       EntryCount;
-  UINT64                       EntryPtr;
-  UINTN                        BasePtr;
-  EFI_ACPI_DESCRIPTION_HEADER  *Table;
-
-  EntryCount = (Xsdt->Header.Length - sizeof (EFI_ACPI_DESCRIPTION_HEADER)) / sizeof(UINT64);
-
-  BasePtr = (UINTN)(&(Xsdt->Entry));
-  for (Index = 0; Index < EntryCount; Index ++) {
-    CopyMem (&EntryPtr, (VOID *)(BasePtr + Index * sizeof(UINT64)), sizeof(UINT64));
-    Table = (EFI_ACPI_DESCRIPTION_HEADER*)((UINTN)(EntryPtr));
-    if (Table->Signature == Signature) {
-      return Table;
-    }
-  }
-
-  return NULL;
-}
-
-/**
-  This function scan ACPI table in RSDP.
-
-  @param  Rsdp       ACPI RSDP
-  @param  Signature  ACPI table signature
-
-  @return ACPI table
-**/
-VOID *
-FindAcpiPtr (
-  IN EFI_ACPI_5_0_ROOT_SYSTEM_DESCRIPTION_POINTER *Rsdp,
-  IN UINT32                                       Signature
-  )
-{
-  EFI_ACPI_DESCRIPTION_HEADER                    *AcpiTable;
-  RSDT_TABLE                                     *Rsdt;
-  XSDT_TABLE                                     *Xsdt;
-
-  AcpiTable = NULL;
-
-  //
-  // Check ACPI2.0 table
-  //
-  Rsdt = (RSDT_TABLE *)(UINTN)Rsdp->RsdtAddress;
-  Xsdt = NULL;
-  if ((Rsdp->Revision >= 2) && (Rsdp->XsdtAddress < (UINT64)(UINTN)-1)) {
-    Xsdt = (XSDT_TABLE *)(UINTN)Rsdp->XsdtAddress;
-  }
-  //
-  // Check Xsdt
-  //
-  if (Xsdt != NULL) {
-    AcpiTable = ScanTableInXSDT (Xsdt, Signature);
-  }
-  //
-  // Check Rsdt
-  //
-  if ((AcpiTable == NULL) && (Rsdt != NULL)) {
-    AcpiTable = ScanTableInRSDT (Rsdt, Signature);
-  }
-
-  return AcpiTable;
-}
-
-/**
   Get Boot performance table form Acpi table.
 
 **/
@@ -235,31 +125,11 @@ EFI_STATUS
 GetBootPerformanceTable (
   )
 {
-  EFI_STATUS                  Status;
-  VOID                        *AcpiTable;
   FIRMWARE_PERFORMANCE_TABLE  *FirmwarePerformanceTable;
 
-  AcpiTable = NULL;
-
-  Status = EfiGetSystemConfigurationTable (
-             &gEfiAcpi20TableGuid,
-             &AcpiTable
-             );
-  if (EFI_ERROR (Status)) {
-    Status = EfiGetSystemConfigurationTable (
-               &gEfiAcpi10TableGuid,
-               &AcpiTable
-                 );
-  }
-  if (EFI_ERROR(Status) || AcpiTable == NULL) {
-    ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_DP_GET_ACPI_TABLE_FAIL), mDpHiiHandle);
-    return Status;
-  }
-
-  FirmwarePerformanceTable = FindAcpiPtr (
-                      (EFI_ACPI_5_0_ROOT_SYSTEM_DESCRIPTION_POINTER *)AcpiTable,
-                      EFI_ACPI_5_0_FIRMWARE_PERFORMANCE_DATA_TABLE_SIGNATURE
-                      );
+  FirmwarePerformanceTable = (FIRMWARE_PERFORMANCE_TABLE *) EfiFindAcpiTableBySignature (
+                                                              EFI_ACPI_5_0_FIRMWARE_PERFORMANCE_DATA_TABLE_SIGNATURE
+                                                              );
   if (FirmwarePerformanceTable == NULL) {
     ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_DP_GET_ACPI_FPDT_FAIL), mDpHiiHandle);
     return EFI_NOT_FOUND;
diff --git a/ShellPkg/DynamicCommand/DpDynamicCommand/Dp.h b/ShellPkg/DynamicCommand/DpDynamicCommand/Dp.h
index 0e6e9422effc..db8472f6558f 100644
--- a/ShellPkg/DynamicCommand/DpDynamicCommand/Dp.h
+++ b/ShellPkg/DynamicCommand/DpDynamicCommand/Dp.h
@@ -21,7 +21,6 @@
 #include <Guid/Performance.h>
 #include <Guid/ExtendedFirmwarePerformance.h>
 #include <Guid/FirmwarePerformance.h>
-#include <Guid/Acpi.h>
 
 #include <Protocol/HiiPackageList.h>
 #include <Protocol/DevicePath.h>
diff --git a/ShellPkg/DynamicCommand/DpDynamicCommand/Dp.uni b/ShellPkg/DynamicCommand/DpDynamicCommand/Dp.uni
index 1d6f25b8c252..7fc2b8d1c966 100644
--- a/ShellPkg/DynamicCommand/DpDynamicCommand/Dp.uni
+++ b/ShellPkg/DynamicCommand/DpDynamicCommand/Dp.uni
@@ -94,7 +94,6 @@
 #string STR_DP_INCOMPLETE              #language en-US  " I "
 #string STR_DP_COMPLETE                #language en-US  "   "
 #string STR_ALIT_UNKNOWN               #language en-US  "Unknown"
-#string STR_DP_GET_ACPI_TABLE_FAIL     #language en-US  "Fail to get ACPI Table\n"
 #string STR_DP_GET_ACPI_FPDT_FAIL      #language en-US  "Fail to get Firmware Performance Data Table (FPDT) in ACPI Table\n"
 
 #string STR_GET_HELP_DP         #language en-US ""
diff --git a/ShellPkg/DynamicCommand/DpDynamicCommand/DpApp.inf b/ShellPkg/DynamicCommand/DpDynamicCommand/DpApp.inf
index cedb333b285c..3a35fca310b0 100644
--- a/ShellPkg/DynamicCommand/DpDynamicCommand/DpApp.inf
+++ b/ShellPkg/DynamicCommand/DpDynamicCommand/DpApp.inf
@@ -59,8 +59,6 @@ [LibraryClasses]
 
 [Guids]
   gPerformanceProtocolGuid                                ## CONSUMES ## SystemTable
-  gEfiAcpi20TableGuid                                     ## CONSUMES ## SystemTable
-  gEfiAcpi10TableGuid                                     ## CONSUMES ## SystemTable
 
 [Protocols]
   gEfiLoadedImageProtocolGuid                             ## CONSUMES
diff --git a/ShellPkg/DynamicCommand/DpDynamicCommand/DpDynamicCommand.inf b/ShellPkg/DynamicCommand/DpDynamicCommand/DpDynamicCommand.inf
index 8fd3bbd5df83..62a3b5246500 100644
--- a/ShellPkg/DynamicCommand/DpDynamicCommand/DpDynamicCommand.inf
+++ b/ShellPkg/DynamicCommand/DpDynamicCommand/DpDynamicCommand.inf
@@ -60,8 +60,6 @@ [LibraryClasses]
 
 [Guids]
   gPerformanceProtocolGuid                                ## CONSUMES ## SystemTable
-  gEfiAcpi20TableGuid                                     ## CONSUMES
-  gEfiAcpi10TableGuid                                     ## CONSUMES
 
 [Protocols]
   gEfiLoadedImageProtocolGuid                             ## CONSUMES
-- 
2.7.0.windows.1