diff options
| author | eric_tian <eric_tian@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-09-23 14:49:45 +0000 |
|---|---|---|
| committer | eric_tian <eric_tian@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-09-23 14:49:45 +0000 |
| commit | dc8d93ca0c9a798fe4e23f68b5b5adc032bf5509 (patch) | |
| tree | 27b9574788851b7b5e9fb8fdc008724fa832a6cd /MdeModulePkg/Core | |
| parent | 6fa28b758b1f4f9febd69a07d27bfa2436a9567d (diff) | |
| download | edk2-platforms-dc8d93ca0c9a798fe4e23f68b5b5adc032bf5509.tar.xz | |
add detail comments on the complicated code segment.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5954 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Core')
| -rw-r--r-- | MdeModulePkg/Core/Dxe/Mem/Page.c | 23 | ||||
| -rw-r--r-- | MdeModulePkg/Core/Dxe/Mem/Pool.c | 4 |
2 files changed, 18 insertions, 9 deletions
diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c b/MdeModulePkg/Core/Dxe/Mem/Page.c index 5e3c81d786..c55bbe3b92 100644 --- a/MdeModulePkg/Core/Dxe/Mem/Page.c +++ b/MdeModulePkg/Core/Dxe/Mem/Page.c @@ -35,18 +35,20 @@ typedef struct { //
UINTN mMemoryMapKey = 0;
-//
-// mMapStack - space to use as temp storage to build new map descriptors
-// mMapDepth - depth of new descriptor stack
-//
-
#define MAX_MAP_DEPTH 6
+
+///
+/// mMapDepth - depth of new descriptor stack
+///
UINTN mMapDepth = 0;
+///
+/// mMapStack - space to use as temp storage to build new map descriptors
+///
MEMORY_MAP mMapStack[MAX_MAP_DEPTH];
UINTN mFreeMapStack = 0;
-//
-// This list maintain the free memory map list
-//
+///
+/// This list maintain the free memory map list
+///
LIST_ENTRY mFreeMemoryMapEntryList = INITIALIZE_LIST_HEAD_VARIABLE (mFreeMemoryMapEntryList);
BOOLEAN mMemoryTypeInformationInitialized = FALSE;
@@ -1287,7 +1289,10 @@ CoreGetMemoryMap ( if ((GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeReserved) ||
(GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo)) {
if ((GcdMapEntry->Attributes & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) {
-
+ //
+ // Create EFI_MEMORY_DESCRIPTOR for every Reserved and MMIO GCD entries
+ // that are marked for runtime use
+ //
MemoryMap->PhysicalStart = GcdMapEntry->BaseAddress;
MemoryMap->VirtualStart = 0;
MemoryMap->NumberOfPages = RShiftU64 ((GcdMapEntry->EndAddress - GcdMapEntry->BaseAddress + 1), EFI_PAGE_SHIFT);
diff --git a/MdeModulePkg/Core/Dxe/Mem/Pool.c b/MdeModulePkg/Core/Dxe/Mem/Pool.c index cea6fada4c..ce70cff513 100644 --- a/MdeModulePkg/Core/Dxe/Mem/Pool.c +++ b/MdeModulePkg/Core/Dxe/Mem/Pool.c @@ -124,6 +124,10 @@ LookupPoolHead ( return &mPoolHead[MemoryType];
}
+ //
+ // MemoryType values in the range 0x80000000..0xFFFFFFFF are reserved for use by UEFI
+ // OS loaders that are provided by operating system vendors
+ //
if (MemoryType < 0) {
for (Link = mPoolHeadList.ForwardLink; Link != &mPoolHeadList; Link = Link->ForwardLink) {
|