X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=MdeModulePkg%2FCore%2FPiSmmCore%2FPool.c;h=ea28484d68d9cf00fb8680a91f5dfcd1be48598c;hb=fbe12b79aef4c2706e90078cc75b94dcf7926ba8;hp=9e86d93e1865ed249a28c73863dd6ade768bf2da;hpb=e42e94041f7c71a5e2e57154bd568f3c14fd6eec;p=mirror_edk2.git

diff --git a/MdeModulePkg/Core/PiSmmCore/Pool.c b/MdeModulePkg/Core/PiSmmCore/Pool.c
index 9e86d93e18..ea28484d68 100644
--- a/MdeModulePkg/Core/PiSmmCore/Pool.c
+++ b/MdeModulePkg/Core/PiSmmCore/Pool.c
@@ -1,7 +1,7 @@
 /** @file
   SMM Memory pool management functions.
 
-  Copyright (c) 2009 - 2010, Intel Corporation.  All rights reserved.<BR>
+  Copyright (c) 2009 - 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        
@@ -42,6 +42,11 @@ typedef struct {
 } FREE_POOL_HEADER;
 
 LIST_ENTRY  mSmmPoolLists[MAX_POOL_INDEX];
+//
+// To cache the SMRAM base since when Loading modules At fixed address feature is enabled, 
+// all module is assigned an offset relative the SMRAM base in build time.
+//
+GLOBAL_REMOVE_IF_UNREFERENCED  EFI_PHYSICAL_ADDRESS       gLoadModuleAtFixAddressSmramBase = 0;
 
 /**
   Called to initialize the memory service.
@@ -56,7 +61,10 @@ SmmInitializeMemoryServices (
   IN EFI_SMRAM_DESCRIPTOR  *SmramRanges
   )
 {
-  UINTN  Index;
+  UINTN                  Index;
+ 	UINT64                 SmmCodeSize;
+ 	UINTN                  CurrentSmramRangesIndex;
+ 	UINT64                 MaxSize;
 
   //
   // Initialize Pool list
@@ -64,7 +72,38 @@ SmmInitializeMemoryServices (
   for (Index = sizeof (mSmmPoolLists) / sizeof (*mSmmPoolLists); Index > 0;) {
     InitializeListHead (&mSmmPoolLists[--Index]);
   }
-
+  CurrentSmramRangesIndex = 0;
+  //
+  // If Loadding Module At fixed Address feature is enabled, cache the SMRAM base here
+  //
+  if (PcdGet64(PcdLoadModuleAtFixAddressEnable) != 0) {
+    //
+    // Build tool will calculate the smm code size and then patch the PcdLoadFixAddressSmmCodePageNumber
+    //
+    SmmCodeSize = LShiftU64 (PcdGet32(PcdLoadFixAddressSmmCodePageNumber), EFI_PAGE_SHIFT);
+    
+    //
+    // Find the largest SMRAM range between 1MB and 4GB that is at least 256KB - 4K in size
+    //
+    for (Index = 0, MaxSize = SIZE_256KB - EFI_PAGE_SIZE; Index < SmramRangeCount; Index++) {
+      if (SmramRanges[Index].CpuStart >= BASE_1MB) {
+        if ((SmramRanges[Index].CpuStart + SmramRanges[Index].PhysicalSize) <= BASE_4GB) {
+          if (SmramRanges[Index].PhysicalSize >= MaxSize) {
+            MaxSize = SmramRanges[Index].PhysicalSize;
+            CurrentSmramRangesIndex = Index;
+          }
+        }
+      }
+    }
+    gLoadModuleAtFixAddressSmramBase = SmramRanges[CurrentSmramRangesIndex].CpuStart;
+    
+    //
+    // cut out a memory range from this SMRAM range with the size SmmCodeSize to hold SMM driver code
+    // A notable thing is that SMM core is already loaded into this range.
+    //
+    SmramRanges[CurrentSmramRangesIndex].CpuStart     = SmramRanges[CurrentSmramRangesIndex].CpuStart + SmmCodeSize; 
+    SmramRanges[CurrentSmramRangesIndex].PhysicalSize = SmramRanges[CurrentSmramRangesIndex].PhysicalSize - SmmCodeSize;
+  }
   //
   // Initialize free SMRAM regions
   //
@@ -76,6 +115,7 @@ SmmInitializeMemoryServices (
       SmramRanges[Index].RegionState
       );
   }
+
 }
 
 /**
@@ -97,11 +137,12 @@ InternalAllocPoolByIndex (
   EFI_STATUS        Status;
   FREE_POOL_HEADER  *Hdr;
 
+  ASSERT (PoolIndex <= MAX_POOL_INDEX);
   Status = EFI_SUCCESS;
   if (PoolIndex == MAX_POOL_INDEX) {
     Hdr = (FREE_POOL_HEADER *)AllocatePages (EFI_SIZE_TO_PAGES (MAX_POOL_SIZE << 1));
     if (Hdr == NULL) {
-      Status = EFI_OUT_OF_RESOURCES;
+      return EFI_OUT_OF_RESOURCES;
     }
   } else if (!IsListEmpty (&mSmmPoolLists[PoolIndex])) {
     Hdr = BASE_CR (GetFirstNode (&mSmmPoolLists[PoolIndex]), FREE_POOL_HEADER, Link);
@@ -144,8 +185,9 @@ InternalFreePoolByIndex (
   ASSERT (((UINTN)FreePoolHdr & (FreePoolHdr->Header.Size - 1)) == 0);
   ASSERT (FreePoolHdr->Header.Size >= MIN_POOL_SIZE);
 
-  PoolIndex = HighBitSet32 ((UINT32)FreePoolHdr->Header.Size) - MIN_POOL_SHIFT;
+  PoolIndex = (UINTN) (HighBitSet32 ((UINT32)FreePoolHdr->Header.Size) - MIN_POOL_SHIFT);
   FreePoolHdr->Header.Available = TRUE;
+  ASSERT (PoolIndex < MAX_POOL_INDEX);
   InsertHeadList (&mSmmPoolLists[PoolIndex], &FreePoolHdr->Link);
   return EFI_SUCCESS;
 }
@@ -182,11 +224,6 @@ SmmAllocatePool (
     return EFI_INVALID_PARAMETER;
   }
 
-  if (Size == 0) {
-    *Buffer = NULL;
-    return EFI_SUCCESS;
-  }
-
   Size += sizeof (*PoolHdr);
   if (Size > MAX_POOL_SIZE) {
     Size = EFI_SIZE_TO_PAGES (Size);
@@ -203,7 +240,7 @@ SmmAllocatePool (
   }
 
   Size = (Size + MIN_POOL_SIZE - 1) >> MIN_POOL_SHIFT;
-  PoolIndex = HighBitSet32 ((UINT32)Size);
+  PoolIndex = (UINTN) HighBitSet32 ((UINT32)Size);
   if ((Size & (Size - 1)) != 0) {
     PoolIndex++;
   }