From: Liming Gao <liming.gao@intel.com>
Date: Thu, 2 Jul 2015 07:48:48 +0000 (+0000)
Subject: MdeModulePkg: Merge GCD range before convert it to EFI memory
X-Git-Tag: edk2-stable201903~9461
X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=commitdiff_plain;h=46a65f1885a16de8eda0797c36638e83555061fc;hp=0255cfb89c1d61f7182cf1689e64ba40f2ad6764

MdeModulePkg: Merge GCD range before convert it to EFI memory

GCD Range is byte address. EFI memory range is page address. To make sure
GCD range is converted to EFI memory range, the following things are added:
1. Merge adjacent GCD range first.
2. Add ASSERT check on GCD range alignment.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17813 6f19259b-4bc3-4df7-8a09-765794883524
---

diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c b/MdeModulePkg/Core/Dxe/Mem/Page.c
index a28552934f..9dbb85da7c 100644
--- a/MdeModulePkg/Core/Dxe/Mem/Page.c
+++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
@@ -1543,6 +1543,7 @@ CoreGetMemoryMap (
   LIST_ENTRY                        *Link;
   MEMORY_MAP                        *Entry;
   EFI_GCD_MAP_ENTRY                 *GcdMapEntry;
+  EFI_GCD_MAP_ENTRY                 MergeGcdMapEntry;
   EFI_MEMORY_TYPE                   Type;
   EFI_MEMORY_DESCRIPTOR             *MemoryMapStart;
 
@@ -1654,25 +1655,49 @@ CoreGetMemoryMap (
     MemoryMap = MergeMemoryMapDescriptor (MemoryMapStart, MemoryMap, Size);
   }
 
-  for (Link = mGcdMemorySpaceMap.ForwardLink; Link != &mGcdMemorySpaceMap; Link = Link->ForwardLink) {
-    GcdMapEntry = CR (Link, EFI_GCD_MAP_ENTRY, Link, EFI_GCD_MAP_SIGNATURE);
-    if ((GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeReserved) ||
-        ((GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo) &&
-        ((GcdMapEntry->Attributes & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME))) {
+ 
+  ZeroMem (&MergeGcdMapEntry, sizeof (MergeGcdMapEntry));
+  GcdMapEntry = NULL;
+  for (Link = mGcdMemorySpaceMap.ForwardLink; ; Link = Link->ForwardLink) {
+    if (Link != &mGcdMemorySpaceMap) {
+      //
+      // Merge adjacent same type and attribute GCD memory range
+      //
+      GcdMapEntry = CR (Link, EFI_GCD_MAP_ENTRY, Link, EFI_GCD_MAP_SIGNATURE);
+  
+      if ((MergeGcdMapEntry.Capabilities == GcdMapEntry->Capabilities) && 
+          (MergeGcdMapEntry.Attributes == GcdMapEntry->Attributes) &&
+          (MergeGcdMapEntry.GcdMemoryType == GcdMapEntry->GcdMemoryType) &&
+          (MergeGcdMapEntry.GcdIoType == GcdMapEntry->GcdIoType)) {
+        MergeGcdMapEntry.EndAddress  = GcdMapEntry->EndAddress;
+        continue;
+      }
+    }
+
+    if ((MergeGcdMapEntry.GcdMemoryType == EfiGcdMemoryTypeReserved) ||
+        ((MergeGcdMapEntry.GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo) &&
+        ((MergeGcdMapEntry.Attributes & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME))) {
+      //
+      // Page Align GCD range is required. When it is converted to EFI_MEMORY_DESCRIPTOR, 
+      // it will be recorded as page PhysicalStart and NumberOfPages. 
+      //
+      ASSERT ((MergeGcdMapEntry.BaseAddress & EFI_PAGE_MASK) == 0);
+      ASSERT (((MergeGcdMapEntry.EndAddress - MergeGcdMapEntry.BaseAddress + 1) & EFI_PAGE_MASK) == 0);
+      
       // 
       // Create EFI_MEMORY_DESCRIPTOR for every Reserved and runtime MMIO GCD entries
       //
-      MemoryMap->PhysicalStart = GcdMapEntry->BaseAddress;
+      MemoryMap->PhysicalStart = MergeGcdMapEntry.BaseAddress;
       MemoryMap->VirtualStart  = 0;
-      MemoryMap->NumberOfPages = RShiftU64 ((GcdMapEntry->EndAddress - GcdMapEntry->BaseAddress + 1), EFI_PAGE_SHIFT);
-      MemoryMap->Attribute     = (GcdMapEntry->Attributes & ~EFI_MEMORY_PORT_IO) | 
-                                (GcdMapEntry->Capabilities & (EFI_MEMORY_RP | EFI_MEMORY_WP | EFI_MEMORY_XP | EFI_MEMORY_RO |
+      MemoryMap->NumberOfPages = RShiftU64 ((MergeGcdMapEntry.EndAddress - MergeGcdMapEntry.BaseAddress + 1), EFI_PAGE_SHIFT);
+      MemoryMap->Attribute     = (MergeGcdMapEntry.Attributes & ~EFI_MEMORY_PORT_IO) | 
+                                (MergeGcdMapEntry.Capabilities & (EFI_MEMORY_RP | EFI_MEMORY_WP | EFI_MEMORY_XP | EFI_MEMORY_RO |
                                 EFI_MEMORY_UC | EFI_MEMORY_UCE | EFI_MEMORY_WC | EFI_MEMORY_WT | EFI_MEMORY_WB));
 
-      if (GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeReserved) {
+      if (MergeGcdMapEntry.GcdMemoryType == EfiGcdMemoryTypeReserved) {
         MemoryMap->Type = EfiReservedMemoryType;
-      } else if (GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo) {
-        if ((GcdMapEntry->Attributes & EFI_MEMORY_PORT_IO) == EFI_MEMORY_PORT_IO) {
+      } else if (MergeGcdMapEntry.GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo) {
+        if ((MergeGcdMapEntry.Attributes & EFI_MEMORY_PORT_IO) == EFI_MEMORY_PORT_IO) {
           MemoryMap->Type = EfiMemoryMappedIOPortSpace;
         } else {
           MemoryMap->Type = EfiMemoryMappedIO;
@@ -1686,15 +1711,22 @@ CoreGetMemoryMap (
       MemoryMap = MergeMemoryMapDescriptor (MemoryMapStart, MemoryMap, Size);
     }
     
-    if (GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypePersistentMemory) {
+    if (MergeGcdMapEntry.GcdMemoryType == EfiGcdMemoryTypePersistentMemory) {
+      //
+      // Page Align GCD range is required. When it is converted to EFI_MEMORY_DESCRIPTOR, 
+      // it will be recorded as page PhysicalStart and NumberOfPages. 
+      //
+      ASSERT ((MergeGcdMapEntry.BaseAddress & EFI_PAGE_MASK) == 0);
+      ASSERT (((MergeGcdMapEntry.EndAddress - MergeGcdMapEntry.BaseAddress + 1) & EFI_PAGE_MASK) == 0);
+
       // 
       // Create EFI_MEMORY_DESCRIPTOR for every Persistent GCD entries
       //
-      MemoryMap->PhysicalStart = GcdMapEntry->BaseAddress;
+      MemoryMap->PhysicalStart = MergeGcdMapEntry.BaseAddress;
       MemoryMap->VirtualStart  = 0;
-      MemoryMap->NumberOfPages = RShiftU64 ((GcdMapEntry->EndAddress - GcdMapEntry->BaseAddress + 1), EFI_PAGE_SHIFT);
-      MemoryMap->Attribute     = GcdMapEntry->Attributes | EFI_MEMORY_NV | 
-                                (GcdMapEntry->Capabilities & (EFI_MEMORY_RP | EFI_MEMORY_WP | EFI_MEMORY_XP | EFI_MEMORY_RO |
+      MemoryMap->NumberOfPages = RShiftU64 ((MergeGcdMapEntry.EndAddress - MergeGcdMapEntry.BaseAddress + 1), EFI_PAGE_SHIFT);
+      MemoryMap->Attribute     = MergeGcdMapEntry.Attributes | EFI_MEMORY_NV | 
+                                (MergeGcdMapEntry.Capabilities & (EFI_MEMORY_RP | EFI_MEMORY_WP | EFI_MEMORY_XP | EFI_MEMORY_RO |
                                 EFI_MEMORY_UC | EFI_MEMORY_UCE | EFI_MEMORY_WC | EFI_MEMORY_WT | EFI_MEMORY_WB));
       MemoryMap->Type          = EfiPersistentMemory;
       
@@ -1704,6 +1736,18 @@ CoreGetMemoryMap (
       //
       MemoryMap = MergeMemoryMapDescriptor (MemoryMapStart, MemoryMap, Size);
     }
+    if (Link == &mGcdMemorySpaceMap) {
+      //
+      // break loop when arrive at head.
+      //
+      break;
+    }
+    if (GcdMapEntry != NULL) {
+      //
+      // Copy new GCD map entry for the following GCD range merge
+      //
+      CopyMem (&MergeGcdMapEntry, GcdMapEntry, sizeof (MergeGcdMapEntry));
+    }
   }
 
   //