From 3df4b6e7e96f671a0fc045119e44130936666030 Mon Sep 17 00:00:00 2001
From: mdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Mon, 1 Mar 2010 05:32:59 +0000
Subject: Update PI SMM Core to ignore memory ranges from SMRAM Descriptors
 that are already allocated or not tested or not ECC initialized yet

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10132 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdeModulePkg/Core/PiSmmCore/Page.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'MdeModulePkg/Core')

diff --git a/MdeModulePkg/Core/PiSmmCore/Page.c b/MdeModulePkg/Core/PiSmmCore/Page.c
index ec4dd4fcb8..781707e244 100644
--- a/MdeModulePkg/Core/PiSmmCore/Page.c
+++ b/MdeModulePkg/Core/PiSmmCore/Page.c
@@ -312,6 +312,16 @@ SmmAddMemoryRegion (
 {
   UINTN  AlignedMemBase;
 
+  //
+  // Do not add memory regions that is already allocated, needs testing, or needs ECC initialization
+  //
+  if ((Attributes & (EFI_ALLOCATED | EFI_NEEDS_TESTING | EFI_NEEDS_ECC_INITIALIZATION)) != 0) {
+    return;
+  }
+  
+  //
+  // Align range on an EFI_PAGE_SIZE boundary
+  //  
   AlignedMemBase = (UINTN)(MemBase + EFI_PAGE_MASK) & ~EFI_PAGE_MASK;
   MemLength -= AlignedMemBase - MemBase;
   SmmFreePages (AlignedMemBase, TRUNCATE_TO_PAGES ((UINTN)MemLength));
-- 
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