Add new PCD gEfiMdeModulePkgTokenSpaceGuid.PcdMaxEfiSystemTablePointerAddress for the MdeModulePkg that allows the platform DSC file to specify the address below which the EFI_SYSTEM_TABLE_POINTER structure is allocated.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11018 6f19259b-4bc3-4df7-8a09-765794883524

2 files changed, 89 insertions, 9 deletions

diff --git a/MdeModulePkg/Core/Dxe/DxeMain.inf b/MdeModulePkg/Core/Dxe/DxeMain.inf
index 52a47f9f8c..8b99908df0 100644
--- a/MdeModulePkg/Core/Dxe/DxeMain.inf
+++ b/MdeModulePkg/Core/Dxe/DxeMain.inf
@@ -147,4 +147,6 @@
 [Pcd]

   gEfiMdeModulePkgTokenSpaceGuid.PcdLoadFixAddressBootTimeCodePageNumber    ## SOMETIMES_CONSUMES

   gEfiMdeModulePkgTokenSpaceGuid.PcdLoadFixAddressRuntimeCodePageNumber     ## SOMETIMES_CONSUMES

-  gEfiMdeModulePkgTokenSpaceGuid.PcdLoadModuleAtFixAddressEnable            ## CONSUMES
\ No newline at end of file
+  gEfiMdeModulePkgTokenSpaceGuid.PcdLoadModuleAtFixAddressEnable            ## CONSUMES

+  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxEfiSystemTablePointerAddress         ## CONSUMES

+  
\ No newline at end of file
diff --git a/MdeModulePkg/Core/Dxe/Misc/DebugImageInfo.c b/MdeModulePkg/Core/Dxe/Misc/DebugImageInfo.c
index 2bff6e8dc7..47660729ba 100644
--- a/MdeModulePkg/Core/Dxe/Misc/DebugImageInfo.c
+++ b/MdeModulePkg/Core/Dxe/Misc/DebugImageInfo.c
@@ -2,7 +2,7 @@
   Support functions for managing debug image info table when loading and unloading

   images.

 

-Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>

+Copyright (c) 2006 - 2010, 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

@@ -24,9 +24,7 @@ EFI_DEBUG_IMAGE_INFO_TABLE_HEADER  mDebugInfoTableHeader = {
 

 UINTN mMaxTableEntries = 0;

 

-EFI_SYSTEM_TABLE_POINTER *mDebugTable = NULL;

-

-#define FOUR_MEG_ALIGNMENT   0x400000

+EFI_SYSTEM_TABLE_POINTER  *mDebugTable = NULL;

 

 #define EFI_DEBUG_TABLE_ENTRY_SIZE       (sizeof (VOID *))

 

@@ -40,18 +38,98 @@ CoreInitializeDebugImageInfoTable (
   VOID

   )

 {

-  EFI_STATUS                          Status;

+  EFI_STATUS            Status;

+  UINTN                 Pages;

+  EFI_PHYSICAL_ADDRESS  Memory;

+  UINTN                 AlignedMemory;

+  UINTN                 AlignmentMask;

+  UINTN                 UnalignedPages;

+  UINTN                 RealPages;

 

   //

   // Allocate 4M aligned page for the structure and fill in the data.

   // Ideally we would update the CRC now as well, but the service may not yet be available.

   // See comments in the CoreUpdateDebugTableCrc32() function below for details.

   //

-  mDebugTable = AllocateAlignedPages (EFI_SIZE_TO_PAGES (sizeof (EFI_SYSTEM_TABLE_POINTER)), FOUR_MEG_ALIGNMENT); 

+  Pages          = EFI_SIZE_TO_PAGES (sizeof (EFI_SYSTEM_TABLE_POINTER));

+  AlignmentMask  = SIZE_4MB - 1;

+  RealPages      = Pages + EFI_SIZE_TO_PAGES (SIZE_4MB);

+

+  //

+  // Attempt to allocate memory below PcdMaxEfiSystemTablePointerAddress

+  // If PcdMaxEfiSystemTablePointerAddress is 0, then allocate memory below

+  // MAX_ADDRESS

+  //

+  Memory = PcdGet64 (PcdMaxEfiSystemTablePointerAddress);

+  if (Memory == 0) {

+    Memory = MAX_ADDRESS;

+  }

+  Status = CoreAllocatePages (

+             AllocateMaxAddress, 

+             EfiBootServicesData,

+             RealPages, 

+             &Memory

+             );

+  if (EFI_ERROR (Status)) {

+    if (PcdGet64 (PcdMaxEfiSystemTablePointerAddress) != 0) {

+      DEBUG ((EFI_D_INFO, "Allocate memory for EFI_SYSTEM_TABLE_POINTER below PcdMaxEfiSystemTablePointerAddress failed. \

+                          Retry to allocate memroy as close to the top of memory as feasible.\n"));

+    }

+    //

+    // If the initial memory allocation fails, then reattempt allocation

+    // as close to the top of memory as feasible.

+    //

+    Status = CoreAllocatePages (

+               AllocateAnyPages, 

+               EfiBootServicesData,

+               RealPages, 

+               &Memory

+               );

+    ASSERT_EFI_ERROR (Status);

+    if (EFI_ERROR (Status)) {

+      return;

+    }

+  }  

+

+  //

+  // Free overallocated pages

+  //

+  AlignedMemory  = ((UINTN) Memory + AlignmentMask) & ~AlignmentMask;

+  UnalignedPages = EFI_SIZE_TO_PAGES (AlignedMemory - (UINTN)Memory);

+  if (UnalignedPages > 0) {

+    //

+    // Free first unaligned page(s).

+    //

+    Status = CoreFreePages (Memory, UnalignedPages);

+    ASSERT_EFI_ERROR (Status);

+  }

+  Memory         = (EFI_PHYSICAL_ADDRESS)(AlignedMemory + EFI_PAGES_TO_SIZE (Pages));

+  UnalignedPages = RealPages - Pages - UnalignedPages;

+  if (UnalignedPages > 0) {

+    //

+    // Free last unaligned page(s).

+    //

+    Status = CoreFreePages (Memory, UnalignedPages);

+    ASSERT_EFI_ERROR (Status);

+  }

+

+  //

+  // Set mDebugTable to the 4MB aligned allocated pages

+  //

+  mDebugTable = (EFI_SYSTEM_TABLE_POINTER  *)(AlignedMemory);

   ASSERT (mDebugTable != NULL);

-  mDebugTable->Signature = EFI_SYSTEM_TABLE_SIGNATURE;

+

+  //

+  // Initialize EFI_SYSTEM_TABLE_POINTER structure

+  //  

+  mDebugTable->Signature          = EFI_SYSTEM_TABLE_SIGNATURE;

   mDebugTable->EfiSystemTableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) gDxeCoreST;

-  mDebugTable->Crc32 = 0;

+  mDebugTable->Crc32              = 0;

+  

+  //

+  // Install the EFI_SYSTEM_TABLE_POINTER structure in the EFI System 

+  // Configuration Table

+  //

   Status = CoreInstallConfigurationTable (&gEfiDebugImageInfoTableGuid, &mDebugInfoTableHeader);

   ASSERT_EFI_ERROR (Status);

 }