mirror of https://github.com/acidanthera/audk.git
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
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@ -35,18 +35,20 @@ typedef struct {
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//
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//
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UINTN mMemoryMapKey = 0;
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UINTN mMemoryMapKey = 0;
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//
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// mMapStack - space to use as temp storage to build new map descriptors
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// mMapDepth - depth of new descriptor stack
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//
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#define MAX_MAP_DEPTH 6
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#define MAX_MAP_DEPTH 6
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///
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/// mMapDepth - depth of new descriptor stack
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///
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UINTN mMapDepth = 0;
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UINTN mMapDepth = 0;
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///
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/// mMapStack - space to use as temp storage to build new map descriptors
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///
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MEMORY_MAP mMapStack[MAX_MAP_DEPTH];
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MEMORY_MAP mMapStack[MAX_MAP_DEPTH];
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UINTN mFreeMapStack = 0;
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UINTN mFreeMapStack = 0;
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//
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///
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// This list maintain the free memory map list
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/// This list maintain the free memory map list
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//
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///
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LIST_ENTRY mFreeMemoryMapEntryList = INITIALIZE_LIST_HEAD_VARIABLE (mFreeMemoryMapEntryList);
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LIST_ENTRY mFreeMemoryMapEntryList = INITIALIZE_LIST_HEAD_VARIABLE (mFreeMemoryMapEntryList);
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BOOLEAN mMemoryTypeInformationInitialized = FALSE;
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BOOLEAN mMemoryTypeInformationInitialized = FALSE;
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@ -1287,7 +1289,10 @@ CoreGetMemoryMap (
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if ((GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeReserved) ||
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if ((GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeReserved) ||
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(GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo)) {
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(GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo)) {
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if ((GcdMapEntry->Attributes & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) {
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if ((GcdMapEntry->Attributes & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) {
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//
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// Create EFI_MEMORY_DESCRIPTOR for every Reserved and MMIO GCD entries
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// that are marked for runtime use
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//
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MemoryMap->PhysicalStart = GcdMapEntry->BaseAddress;
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MemoryMap->PhysicalStart = GcdMapEntry->BaseAddress;
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MemoryMap->VirtualStart = 0;
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MemoryMap->VirtualStart = 0;
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MemoryMap->NumberOfPages = RShiftU64 ((GcdMapEntry->EndAddress - GcdMapEntry->BaseAddress + 1), EFI_PAGE_SHIFT);
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MemoryMap->NumberOfPages = RShiftU64 ((GcdMapEntry->EndAddress - GcdMapEntry->BaseAddress + 1), EFI_PAGE_SHIFT);
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@ -124,6 +124,10 @@ LookupPoolHead (
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return &mPoolHead[MemoryType];
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return &mPoolHead[MemoryType];
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}
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}
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//
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// MemoryType values in the range 0x80000000..0xFFFFFFFF are reserved for use by UEFI
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// OS loaders that are provided by operating system vendors
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//
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if (MemoryType < 0) {
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if (MemoryType < 0) {
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for (Link = mPoolHeadList.ForwardLink; Link != &mPoolHeadList; Link = Link->ForwardLink) {
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for (Link = mPoolHeadList.ForwardLink; Link != &mPoolHeadList; Link = Link->ForwardLink) {
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