From 873b7997efe978eab9b8fc9d41e6fe9baf35d127 Mon Sep 17 00:00:00 2001
From: jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Mon, 27 Apr 2009 18:26:15 +0000
Subject: [PATCH] Add PcdDxeIplSupportUefiDecompress usage into DxeIpl to save
 space if UEFI decompression is not needed to find the DXE Core.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8190 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf |  3 +
 MdeModulePkg/Core/DxeIplPeim/DxeLoad.c  | 96 +++++++++++++------------
 2 files changed, 53 insertions(+), 46 deletions(-)

diff --git a/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf b/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
index 7b8bffcd8c..6e2eab8a04 100644
--- a/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
+++ b/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
@@ -91,6 +91,9 @@
 [FeaturePcd.IA32]
   gEfiMdeModulePkgTokenSpaceGuid.PcdDxeIplSwitchToLongMode
 
+[FeaturePcd.common]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdDxeIplSupportUefiDecompress
+
 [FixedPcd.common]
   gEfiMdePkgTokenSpaceGuid.PcdStatusCodeValuePeiHandoffToDxe
 
diff --git a/MdeModulePkg/Core/DxeIplPeim/DxeLoad.c b/MdeModulePkg/Core/DxeIplPeim/DxeLoad.c
index fc485b9d24..e756f0ba58 100644
--- a/MdeModulePkg/Core/DxeIplPeim/DxeLoad.c
+++ b/MdeModulePkg/Core/DxeIplPeim/DxeLoad.c
@@ -586,58 +586,62 @@ Decompress (
   //
   switch (CompressionSection->CompressionType) {
   case EFI_STANDARD_COMPRESSION:
-    //
-    // Load EFI standard compression.
-    // For compressed data, decompress them to destination buffer.
-    //
-    Status = UefiDecompressGetInfo (
-               (UINT8 *) ((EFI_COMPRESSION_SECTION *) Section + 1),
-               (UINT32) SectionLength - sizeof (EFI_COMPRESSION_SECTION),
-               (UINT32 *) &DstBufferSize,
-               &ScratchBufferSize
-               );
-    if (EFI_ERROR (Status)) {
+    if (FeaturePcdGet(PcdDxeIplSupportUefiDecompress)) {
       //
-      // GetInfo failed
+      // Load EFI standard compression.
+      // For compressed data, decompress them to destination buffer.
       //
-      DEBUG ((DEBUG_ERROR, "Decompress GetInfo Failed - %r\n", Status));
-      return EFI_NOT_FOUND;
-    }
-    //
-    // Allocate scratch buffer
-    //
-    ScratchBuffer = AllocatePages (EFI_SIZE_TO_PAGES (ScratchBufferSize));
-    if (ScratchBuffer == NULL) {
-      return EFI_OUT_OF_RESOURCES;
-    }
-    //
-    // Allocate destination buffer, extra one page for adjustment 
-    //
-    DstBuffer = AllocatePages (EFI_SIZE_TO_PAGES (DstBufferSize) + 1);
-    if (DstBuffer == NULL) {
-      return EFI_OUT_OF_RESOURCES;
-    }
-    //
-    // DstBuffer still is one section. Adjust DstBuffer offset, skip EFI section header
-    // to make section data at page alignment.
-    //
-    DstBuffer = DstBuffer + EFI_PAGE_SIZE - sizeof (EFI_COMMON_SECTION_HEADER);
-    //
-    // Call decompress function
-    //
-    Status = UefiDecompress (
-                (CHAR8 *) ((EFI_COMPRESSION_SECTION *) Section + 1),
-                DstBuffer,
-                ScratchBuffer
-                );
-    if (EFI_ERROR (Status)) {
+      Status = UefiDecompressGetInfo (
+                 (UINT8 *) ((EFI_COMPRESSION_SECTION *) Section + 1),
+                 (UINT32) SectionLength - sizeof (EFI_COMPRESSION_SECTION),
+                 (UINT32 *) &DstBufferSize,
+                 &ScratchBufferSize
+                 );
+      if (EFI_ERROR (Status)) {
+        //
+        // GetInfo failed
+        //
+        DEBUG ((DEBUG_ERROR, "Decompress GetInfo Failed - %r\n", Status));
+        return EFI_NOT_FOUND;
+      }
+      //
+      // Allocate scratch buffer
+      //
+      ScratchBuffer = AllocatePages (EFI_SIZE_TO_PAGES (ScratchBufferSize));
+      if (ScratchBuffer == NULL) {
+        return EFI_OUT_OF_RESOURCES;
+      }
+      //
+      // Allocate destination buffer, extra one page for adjustment 
+      //
+      DstBuffer = AllocatePages (EFI_SIZE_TO_PAGES (DstBufferSize) + 1);
+      if (DstBuffer == NULL) {
+        return EFI_OUT_OF_RESOURCES;
+      }
+      //
+      // DstBuffer still is one section. Adjust DstBuffer offset, skip EFI section header
+      // to make section data at page alignment.
       //
-      // Decompress failed
+      DstBuffer = DstBuffer + EFI_PAGE_SIZE - sizeof (EFI_COMMON_SECTION_HEADER);
       //
-      DEBUG ((DEBUG_ERROR, "Decompress Failed - %r\n", Status));
+      // Call decompress function
+      //
+      Status = UefiDecompress (
+                  (CHAR8 *) ((EFI_COMPRESSION_SECTION *) Section + 1),
+                  DstBuffer,
+                  ScratchBuffer
+                  );
+      if (EFI_ERROR (Status)) {
+        //
+        // Decompress failed
+        //
+        DEBUG ((DEBUG_ERROR, "Decompress Failed - %r\n", Status));
+        return EFI_NOT_FOUND;
+      }
+      break;
+    } else {
       return EFI_NOT_FOUND;
     }
-    break;
 
   case EFI_NOT_COMPRESSED:
     //
-- 
2.39.2