diff options
Diffstat (limited to 'EdkModulePkg/Core/Dxe/Mem/Page.c')
| -rw-r--r-- | EdkModulePkg/Core/Dxe/Mem/Page.c | 1589 |
1 files changed, 1589 insertions, 0 deletions
diff --git a/EdkModulePkg/Core/Dxe/Mem/Page.c b/EdkModulePkg/Core/Dxe/Mem/Page.c new file mode 100644 index 0000000000..e65b0283c6 --- /dev/null +++ b/EdkModulePkg/Core/Dxe/Mem/Page.c @@ -0,0 +1,1589 @@ +/*++
+
+Copyright (c) 2006, Intel Corporation
+All rights reserved. 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
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+Module Name:
+
+ page.c
+
+Abstract:
+
+ EFI Memory page management
+
+
+Revision History
+
+--*/
+
+#include <DxeMain.h>
+
+#define EFI_DEFAULT_PAGE_ALLOCATION_ALIGNMENT (EFI_PAGE_SIZE)
+
+//
+// Entry for tracking the memory regions for each memory type to help cooalese like memory types
+//
+typedef struct {
+ EFI_PHYSICAL_ADDRESS BaseAddress;
+ EFI_PHYSICAL_ADDRESS MaximumAddress;
+ UINT64 CurrentNumberOfPages;
+ UINTN InformationIndex;
+} EFI_MEMORY_TYPE_STAISTICS;
+
+//
+// MemoryMap - The current memory map
+//
+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
+UINTN mMapDepth = 0;
+MEMORY_MAP mMapStack[MAX_MAP_DEPTH];
+UINTN mFreeMapStack = 0;
+
+BOOLEAN mMemoryTypeInformationInitialized = FALSE;
+
+EFI_MEMORY_TYPE_STAISTICS mMemoryTypeStatistics[EfiMaxMemoryType + 1] = {
+ { 0, EFI_MAX_ADDRESS, 0, EfiMaxMemoryType }, // EfiReservedMemoryType
+ { 0, EFI_MAX_ADDRESS, 0, EfiMaxMemoryType }, // EfiLoaderCode
+ { 0, EFI_MAX_ADDRESS, 0, EfiMaxMemoryType }, // EfiLoaderData
+ { 0, EFI_MAX_ADDRESS, 0, EfiMaxMemoryType }, // EfiBootServicesCode
+ { 0, EFI_MAX_ADDRESS, 0, EfiMaxMemoryType }, // EfiBootServicesData
+ { 0, EFI_MAX_ADDRESS, 0, EfiMaxMemoryType }, // EfiRuntimeServicesCode
+ { 0, EFI_MAX_ADDRESS, 0, EfiMaxMemoryType }, // EfiRuntimeServicesData
+ { 0, EFI_MAX_ADDRESS, 0, EfiMaxMemoryType }, // EfiConventionalMemory
+ { 0, EFI_MAX_ADDRESS, 0, EfiMaxMemoryType }, // EfiUnusableMemory
+ { 0, EFI_MAX_ADDRESS, 0, EfiMaxMemoryType }, // EfiACPIReclaimMemory
+ { 0, EFI_MAX_ADDRESS, 0, EfiMaxMemoryType }, // EfiACPIMemoryNVS
+ { 0, EFI_MAX_ADDRESS, 0, EfiMaxMemoryType }, // EfiMemoryMappedIO
+ { 0, EFI_MAX_ADDRESS, 0, EfiMaxMemoryType }, // EfiMemoryMappedIOPortSpace
+ { 0, EFI_MAX_ADDRESS, 0, EfiMaxMemoryType }, // EfiPalCode
+ { 0, EFI_MAX_ADDRESS, 0, EfiMaxMemoryType } // EfiMaxMemoryType
+};
+
+EFI_PHYSICAL_ADDRESS mDefaultMaximumAddress = EFI_MAX_ADDRESS;
+
+EFI_MEMORY_TYPE_INFORMATION gMemoryTypeInformation[EfiMaxMemoryType + 1] = {
+ { EfiReservedMemoryType, 0 },
+ { EfiLoaderCode, 0 },
+ { EfiLoaderData, 0 },
+ { EfiBootServicesCode, 0 },
+ { EfiBootServicesData, 0 },
+ { EfiRuntimeServicesCode, 0 },
+ { EfiRuntimeServicesData, 0 },
+ { EfiConventionalMemory, 0 },
+ { EfiUnusableMemory, 0 },
+ { EfiACPIReclaimMemory, 0 },
+ { EfiACPIMemoryNVS, 0 },
+ { EfiMemoryMappedIO, 0 },
+ { EfiMemoryMappedIOPortSpace, 0 },
+ { EfiPalCode, 0 },
+ { EfiMaxMemoryType, 0 }
+};
+
+//
+// Internal prototypes
+//
+VOID
+PromoteMemoryResource (
+ VOID
+);
+
+STATIC
+VOID
+CoreAddRange (
+ IN EFI_MEMORY_TYPE Type,
+ IN EFI_PHYSICAL_ADDRESS Start,
+ IN EFI_PHYSICAL_ADDRESS End,
+ IN UINT64 Attribute
+ );
+
+STATIC
+VOID
+CoreFreeMemoryMapStack (
+ VOID
+ );
+
+STATIC
+EFI_STATUS
+CoreConvertPages (
+ IN UINT64 Start,
+ IN UINT64 NumberOfPages,
+ IN EFI_MEMORY_TYPE NewType
+ );
+
+STATIC
+VOID
+RemoveMemoryMapEntry (
+ MEMORY_MAP *Entry
+ );
+
+VOID
+CoreAcquireMemoryLock (
+ VOID
+ )
+/*++
+
+Routine Description:
+
+ Enter critical section by gaining lock on gMemoryLock
+
+Arguments:
+
+ None
+
+Returns:
+
+ None
+
+--*/
+{
+ CoreAcquireLock (&gMemoryLock);
+}
+
+
+VOID
+CoreReleaseMemoryLock (
+ VOID
+ )
+/*++
+
+Routine Description:
+
+ Exit critical section by releasing lock on gMemoryLock
+
+Arguments:
+
+ None
+
+Returns:
+
+ None
+
+--*/
+{
+ CoreReleaseLock (&gMemoryLock);
+}
+
+VOID
+PromoteMemoryResource (
+ VOID
+ )
+/*++
+
+Routine Description:
+
+ Find untested but initialized memory regions in GCD map and convert them to be DXE allocatable.
+
+Arguments:
+
+ None
+
+Returns:
+
+ None
+
+--*/
+{
+ LIST_ENTRY *Link;
+ EFI_GCD_MAP_ENTRY *Entry;
+
+ DEBUG ((EFI_D_ERROR | EFI_D_PAGE, "Promote the memory resource\n"));
+
+ CoreAcquireGcdMemoryLock ();
+
+ Link = mGcdMemorySpaceMap.ForwardLink;
+ while (Link != &mGcdMemorySpaceMap) {
+
+ Entry = CR (Link, EFI_GCD_MAP_ENTRY, Link, EFI_GCD_MAP_SIGNATURE);
+
+ if (Entry->GcdMemoryType == EfiGcdMemoryTypeReserved &&
+ Entry->EndAddress < EFI_MAX_ADDRESS &&
+ (Entry->Capabilities & (EFI_MEMORY_PRESENT | EFI_MEMORY_INITIALIZED | EFI_MEMORY_TESTED)) ==
+ (EFI_MEMORY_PRESENT | EFI_MEMORY_INITIALIZED)) {
+ //
+ // Update the GCD map
+ //
+ Entry->GcdMemoryType = EfiGcdMemoryTypeSystemMemory;
+ Entry->Capabilities |= EFI_MEMORY_TESTED;
+ Entry->ImageHandle = gDxeCoreImageHandle;
+ Entry->DeviceHandle = NULL;
+
+ //
+ // Add to allocable system memory resource
+ //
+
+ CoreAddRange (
+ EfiConventionalMemory,
+ Entry->BaseAddress,
+ Entry->EndAddress,
+ Entry->Capabilities & ~(EFI_MEMORY_PRESENT | EFI_MEMORY_INITIALIZED | EFI_MEMORY_TESTED | EFI_MEMORY_RUNTIME)
+ );
+ CoreFreeMemoryMapStack ();
+
+ }
+
+ Link = Link->ForwardLink;
+ }
+
+ CoreReleaseGcdMemoryLock ();
+
+ return;
+}
+
+VOID
+CoreAddMemoryDescriptor (
+ IN EFI_MEMORY_TYPE Type,
+ IN EFI_PHYSICAL_ADDRESS Start,
+ IN UINT64 NumberOfPages,
+ IN UINT64 Attribute
+ )
+/*++
+
+Routine Description:
+
+ Called to initialize the memory map and add descriptors to
+ the current descriptor list.
+
+ The first descriptor that is added must be general usable
+ memory as the addition allocates heap.
+
+Arguments:
+
+ Type - The type of memory to add
+
+ Start - The starting address in the memory range
+ Must be page aligned
+
+ NumberOfPages - The number of pages in the range
+
+ Attribute - Attributes of the memory to add
+
+Returns:
+
+ None. The range is added to the memory map
+
+--*/
+{
+ EFI_PHYSICAL_ADDRESS End;
+ EFI_STATUS Status;
+ UINTN Index;
+ UINTN FreeIndex;
+
+ if ((Start & EFI_PAGE_MASK) != 0) {
+ return;
+ }
+
+ if (Type >= EfiMaxMemoryType && Type <= 0x7fffffff) {
+ return;
+ }
+
+ CoreAcquireMemoryLock ();
+ End = Start + LShiftU64 (NumberOfPages, EFI_PAGE_SHIFT) - 1;
+ CoreAddRange (Type, Start, End, Attribute);
+ CoreFreeMemoryMapStack ();
+ CoreReleaseMemoryLock ();
+
+ //
+ // Check to see if the statistics for the different memory types have already been established
+ //
+ if (mMemoryTypeInformationInitialized) {
+ return;
+ }
+
+ //
+ // Loop through each memory type in the order specified by the gMemoryTypeInformation[] array
+ //
+ for (Index = 0; gMemoryTypeInformation[Index].Type != EfiMaxMemoryType; Index++) {
+ //
+ // Make sure the memory type in the gMemoryTypeInformation[] array is valid
+ //
+ Type = gMemoryTypeInformation[Index].Type;
+ if (Type < 0 || Type > EfiMaxMemoryType) {
+ continue;
+ }
+
+ if (gMemoryTypeInformation[Index].NumberOfPages != 0) {
+ //
+ // Allocate pages for the current memory type from the top of available memory
+ //
+ Status = CoreAllocatePages (
+ AllocateAnyPages,
+ Type,
+ gMemoryTypeInformation[Index].NumberOfPages,
+ &mMemoryTypeStatistics[Type].BaseAddress
+ );
+ if (EFI_ERROR (Status)) {
+ //
+ // If an error occurs allocating the pages for the current memory type, then
+ // free all the pages allocates for the previous memory types and return. This
+ // operation with be retied when/if more memory is added to the system
+ //
+ for (FreeIndex = 0; FreeIndex < Index; FreeIndex++) {
+ //
+ // Make sure the memory type in the gMemoryTypeInformation[] array is valid
+ //
+ Type = gMemoryTypeInformation[FreeIndex].Type;
+ if (Type < 0 || Type > EfiMaxMemoryType) {
+ continue;
+ }
+
+ if (gMemoryTypeInformation[FreeIndex].NumberOfPages != 0) {
+ CoreFreePages (
+ mMemoryTypeStatistics[Type].BaseAddress,
+ gMemoryTypeInformation[FreeIndex].NumberOfPages
+ );
+ mMemoryTypeStatistics[Type].BaseAddress = 0;
+ mMemoryTypeStatistics[Type].MaximumAddress = EFI_MAX_ADDRESS;
+ }
+ }
+ return;
+ }
+
+ //
+ // Compute the address at the top of the current statistics
+ //
+ mMemoryTypeStatistics[Type].MaximumAddress =
+ mMemoryTypeStatistics[Type].BaseAddress +
+ LShiftU64 (gMemoryTypeInformation[Index].NumberOfPages, EFI_PAGE_SHIFT) - 1;
+
+ //
+ // If the current base address is the lowest address so far, then update the default
+ // maximum address
+ //
+ if (mMemoryTypeStatistics[Type].BaseAddress < mDefaultMaximumAddress) {
+ mDefaultMaximumAddress = mMemoryTypeStatistics[Type].BaseAddress - 1;
+ }
+ }
+ }
+
+ //
+ // There was enough system memory for all the the memory types were allocated. So,
+ // those memory areas can be freed for future allocations, and all future memory
+ // allocations can occur within their respective bins
+ //
+ for (Index = 0; gMemoryTypeInformation[Index].Type != EfiMaxMemoryType; Index++) {
+ //
+ // Make sure the memory type in the gMemoryTypeInformation[] array is valid
+ //
+ Type = gMemoryTypeInformation[Index].Type;
+ if (Type < 0 || Type > EfiMaxMemoryType) {
+ continue;
+ }
+
+ if (gMemoryTypeInformation[Index].NumberOfPages != 0) {
+ CoreFreePages (
+ mMemoryTypeStatistics[Type].BaseAddress,
+ gMemoryTypeInformation[Index].NumberOfPages
+ );
+ gMemoryTypeInformation[Index].NumberOfPages = 0;
+ }
+ }
+
+ //
+ // If the number of pages reserved for a memory type is 0, then all allocations for that type
+ // should be in the default range.
+ //
+ for (Type = 0; Type < EfiMaxMemoryType; Type++) {
+ for (Index = 0; gMemoryTypeInformation[Index].Type != EfiMaxMemoryType; Index++) {
+ if (Type == (EFI_MEMORY_TYPE)gMemoryTypeInformation[Index].Type) {
+ mMemoryTypeStatistics[Type].InformationIndex = Index;
+ }
+ }
+ mMemoryTypeStatistics[Type].CurrentNumberOfPages = 0;
+ if (mMemoryTypeStatistics[Type].MaximumAddress == EFI_MAX_ADDRESS) {
+ mMemoryTypeStatistics[Type].MaximumAddress = mDefaultMaximumAddress;
+ }
+ }
+
+ mMemoryTypeInformationInitialized = TRUE;
+}
+
+
+STATIC
+VOID
+CoreAddRange (
+ IN EFI_MEMORY_TYPE Type,
+ IN EFI_PHYSICAL_ADDRESS Start,
+ IN EFI_PHYSICAL_ADDRESS End,
+ IN UINT64 Attribute
+ )
+/*++
+
+Routine Description:
+
+ Internal function. Adds a ranges to the memory map.
+ The range must not already exist in the map.
+
+Arguments:
+
+ Type - The type of memory range to add
+
+ Start - The starting address in the memory range
+ Must be paged aligned
+
+ End - The last address in the range
+ Must be the last byte of a page
+
+ Attribute - The attributes of the memory range to add
+
+Returns:
+
+ None. The range is added to the memory map
+
+--*/
+{
+ LIST_ENTRY *Link;
+ MEMORY_MAP *Entry;
+
+ ASSERT ((Start & EFI_PAGE_MASK) == 0);
+ ASSERT (End > Start) ;
+
+ ASSERT_LOCKED (&gMemoryLock);
+
+ DEBUG ((EFI_D_PAGE, "AddRange: %lx-%lx to %d\n", Start, End, Type));
+
+ //
+ // Memory map being altered so updated key
+ //
+ mMemoryMapKey += 1;
+
+ //
+ // UEFI 2.0 added an event group for notificaiton on memory map changes.
+ // So we need to signal this Event Group every time the memory map changes.
+ // If we are in EFI 1.10 compatability mode no event groups will be
+ // found and nothing will happen we we call this function. These events
+ // will get signaled but since a lock is held around the call to this
+ // function the notificaiton events will only be called after this funciton
+ // returns and the lock is released.
+ //
+ CoreNotifySignalList (&gEfiEventMemoryMapChangeGuid);
+
+ //
+ // Look for adjoining memory descriptor
+ //
+
+ // Two memory descriptors can only be merged if they have the same Type
+ // and the same Attribute
+ //
+
+ Link = gMemoryMap.ForwardLink;
+ while (Link != &gMemoryMap) {
+ Entry = CR (Link, MEMORY_MAP, Link, MEMORY_MAP_SIGNATURE);
+ Link = Link->ForwardLink;
+
+ if (Entry->Type != Type) {
+ continue;
+ }
+
+ if (Entry->Attribute != Attribute) {
+ continue;
+ }
+
+ if (Entry->End + 1 == Start) {
+
+ Start = Entry->Start;
+ RemoveMemoryMapEntry (Entry);
+
+ } else if (Entry->Start == End + 1) {
+
+ End = Entry->End;
+ RemoveMemoryMapEntry (Entry);
+ }
+ }
+
+ //
+ // Add descriptor
+ //
+
+ mMapStack[mMapDepth].Signature = MEMORY_MAP_SIGNATURE;
+ mMapStack[mMapDepth].FromPool = FALSE;
+ mMapStack[mMapDepth].Type = Type;
+ mMapStack[mMapDepth].Start = Start;
+ mMapStack[mMapDepth].End = End;
+ mMapStack[mMapDepth].VirtualStart = 0;
+ mMapStack[mMapDepth].Attribute = Attribute;
+ InsertTailList (&gMemoryMap, &mMapStack[mMapDepth].Link);
+
+ mMapDepth += 1;
+ ASSERT (mMapDepth < MAX_MAP_DEPTH);
+
+ return ;
+}
+
+STATIC
+VOID
+CoreFreeMemoryMapStack (
+ VOID
+ )
+/*++
+
+Routine Description:
+
+ Internal function. Moves any memory descriptors that are on the
+ temporary descriptor stack to heap.
+
+Arguments:
+
+ None
+
+Returns:
+
+ None
+
+--*/
+{
+ MEMORY_MAP *Entry;
+ MEMORY_MAP *Entry2;
+ LIST_ENTRY *Link2;
+
+ ASSERT_LOCKED (&gMemoryLock);
+
+ //
+ // If already freeing the map stack, then return
+ //
+ if (mFreeMapStack) {
+ return ;
+ }
+
+ //
+ // Move the temporary memory descriptor stack into pool
+ //
+ mFreeMapStack += 1;
+
+ while (mMapDepth) {
+
+ //
+ // Allocate memory for a entry
+ //
+ Entry = CoreAllocatePoolI (EfiRuntimeServicesData, sizeof(MEMORY_MAP));
+
+ ASSERT (Entry);
+
+ //
+ // Update to proper entry
+ //
+ mMapDepth -= 1;
+
+ if (mMapStack[mMapDepth].Link.ForwardLink != NULL) {
+
+ //
+ // Move this entry to general pool
+ //
+ RemoveEntryList (&mMapStack[mMapDepth].Link);
+ mMapStack[mMapDepth].Link.ForwardLink = NULL;
+
+ CopyMem (Entry , &mMapStack[mMapDepth], sizeof (MEMORY_MAP));
+ Entry->FromPool = TRUE;
+
+ //
+ // Find insertion location
+ //
+ for (Link2 = gMemoryMap.ForwardLink; Link2 != &gMemoryMap; Link2 = Link2->ForwardLink) {
+ Entry2 = CR (Link2, MEMORY_MAP, Link, MEMORY_MAP_SIGNATURE);
+ if (Entry2->FromPool && Entry2->Start > Entry->Start) {
+ break;
+ }
+ }
+
+ InsertTailList (Link2, &Entry->Link);
+
+ } else {
+
+ //
+ // It was removed, don't move it
+ //
+ CoreFreePoolI (Entry);
+
+ }
+ }
+
+ mFreeMapStack -= 1;
+}
+
+STATIC
+VOID
+RemoveMemoryMapEntry (
+ MEMORY_MAP *Entry
+ )
+/*++
+
+Routine Description:
+
+ Internal function. Removes a descriptor entry.
+
+Arguments:
+
+ Entry - The entry to remove
+
+Returns:
+
+ None
+
+--*/
+{
+ RemoveEntryList (&Entry->Link);
+ Entry->Link.ForwardLink = NULL;
+
+ if (Entry->FromPool) {
+ CoreFreePoolI (Entry);
+ }
+}
+
+
+STATIC
+EFI_STATUS
+CoreConvertPages (
+ IN UINT64 Start,
+ IN UINT64 NumberOfPages,
+ IN EFI_MEMORY_TYPE NewType
+ )
+/*++
+
+Routine Description:
+
+ Internal function. Converts a memory range to the specified type.
+ The range must exist in the memory map.
+
+Arguments:
+
+ Start - The first address of the range
+ Must be page aligned
+
+ NumberOfPages - The number of pages to convert
+
+ NewType - The new type for the memory range
+
+Returns:
+
+ EFI_INVALID_PARAMETER - Invalid parameter
+
+ EFI_NOT_FOUND - Could not find a descriptor cover the specified range
+ or convertion not allowed.
+
+ EFI_SUCCESS - Successfully converts the memory range to the specified type.
+
+--*/
+{
+
+ UINT64 NumberOfBytes;
+ UINT64 End;
+ UINT64 RangeEnd;
+ UINT64 Attribute;
+ LIST_ENTRY *Link;
+ MEMORY_MAP *Entry;
+
+ Entry = NULL;
+ NumberOfBytes = LShiftU64 (NumberOfPages, EFI_PAGE_SHIFT);
+ End = Start + NumberOfBytes - 1;
+
+ ASSERT (NumberOfPages);
+ ASSERT ((Start & EFI_PAGE_MASK) == 0);
+ ASSERT (End > Start) ;
+ ASSERT_LOCKED (&gMemoryLock);
+
+ if (NumberOfPages == 0 || (Start & EFI_PAGE_MASK ) || (Start > (Start + NumberOfBytes))) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Convert the entire range
+ //
+
+ while (Start < End) {
+
+ //
+ // Find the entry that the covers the range
+ //
+ for (Link = gMemoryMap.ForwardLink; Link != &gMemoryMap; Link = Link->ForwardLink) {
+ Entry = CR (Link, MEMORY_MAP, Link, MEMORY_MAP_SIGNATURE);
+
+ if (Entry->Start <= Start && Entry->End > Start) {
+ break;
+ }
+ }
+
+ if (Link == &gMemoryMap) {
+ DEBUG ((EFI_D_ERROR | EFI_D_PAGE, "ConvertPages: failed to find range %lx - %lx\n", Start, End));
+ return EFI_NOT_FOUND;
+ }
+
+ //
+ // Convert range to the end, or to the end of the descriptor
+ // if that's all we've got
+ //
+ RangeEnd = End;
+ if (Entry->End < End) {
+ RangeEnd = Entry->End;
+ }
+
+ DEBUG ((EFI_D_PAGE, "ConvertRange: %lx-%lx to %d\n", Start, RangeEnd, NewType));
+
+ //
+ // Debug code - verify conversion is allowed
+ //
+ if (!(NewType == EfiConventionalMemory ? 1 : 0) ^ (Entry->Type == EfiConventionalMemory ? 1 : 0)) {
+ DEBUG ((EFI_D_ERROR , "ConvertPages: Incompatible memory types\n"));
+ return EFI_NOT_FOUND;
+ }
+
+ //
+ // Update counters for the number of pages allocated to each memory type
+ //
+ if (Entry->Type >= 0 && Entry->Type < EfiMaxMemoryType) {
+ if (Start >= mMemoryTypeStatistics[Entry->Type].BaseAddress &&
+ Start <= mMemoryTypeStatistics[Entry->Type].MaximumAddress) {
+ if (NumberOfPages > mMemoryTypeStatistics[Entry->Type].CurrentNumberOfPages) {
+ mMemoryTypeStatistics[Entry->Type].CurrentNumberOfPages = 0;
+ } else {
+ mMemoryTypeStatistics[Entry->Type].CurrentNumberOfPages -= NumberOfPages;
+ }
+ }
+ }
+
+ if (NewType >= 0 && NewType < EfiMaxMemoryType) {
+ if (Start >= mMemoryTypeStatistics[NewType].BaseAddress && Start <= mMemoryTypeStatistics[NewType].MaximumAddress) {
+ mMemoryTypeStatistics[NewType].CurrentNumberOfPages += NumberOfPages;
+ if (mMemoryTypeStatistics[NewType].CurrentNumberOfPages >
+ gMemoryTypeInformation[mMemoryTypeStatistics[NewType].InformationIndex].NumberOfPages) {
+ gMemoryTypeInformation[mMemoryTypeStatistics[NewType].InformationIndex].NumberOfPages = (UINT32)mMemoryTypeStatistics[NewType].CurrentNumberOfPages;
+ }
+ }
+ }
+
+ //
+ // Pull range out of descriptor
+ //
+ if (Entry->Start == Start) {
+
+ //
+ // Clip start
+ //
+ Entry->Start = RangeEnd + 1;
+
+ } else if (Entry->End == RangeEnd) {
+
+ //
+ // Clip end
+ //
+ Entry->End = Start - 1;
+
+ } else {
+
+ //
+ // Pull it out of the center, clip current
+ //
+
+ //
+ // Add a new one
+ //
+ mMapStack[mMapDepth].Signature = MEMORY_MAP_SIGNATURE;
+ mMapStack[mMapDepth].FromPool = FALSE;
+ mMapStack[mMapDepth].Type = Entry->Type;
+ mMapStack[mMapDepth].Start = RangeEnd+1;
+ mMapStack[mMapDepth].End = Entry->End;
+
+ //
+ // Inherit Attribute from the Memory Descriptor that is being clipped
+ //
+ mMapStack[mMapDepth].Attribute = Entry->Attribute;
+
+ Entry->End = Start - 1;
+ ASSERT (Entry->Start < Entry->End);
+
+ Entry = &mMapStack[mMapDepth];
+ InsertTailList (&gMemoryMap, &Entry->Link);
+
+ mMapDepth += 1;
+ ASSERT (mMapDepth < MAX_MAP_DEPTH);
+ }
+
+ //
+ // The new range inherits the same Attribute as the Entry
+ //it is being cut out of
+ //
+ Attribute = Entry->Attribute;
+
+ //
+ // If the descriptor is empty, then remove it from the map
+ //
+ if (Entry->Start == Entry->End + 1) {
+ RemoveMemoryMapEntry (Entry);
+ Entry = NULL;
+ }
+
+ //
+ // Add our new range in
+ //
+ CoreAddRange (NewType, Start, RangeEnd, Attribute);
+
+ //
+ // Move any map descriptor stack to general pool
+ //
+ CoreFreeMemoryMapStack ();
+
+ //
+ // Bump the starting address, and convert the next range
+ //
+ Start = RangeEnd + 1;
+ }
+
+ //
+ // Converted the whole range, done
+ //
+
+ return EFI_SUCCESS;
+}
+
+
+STATIC
+UINT64
+CoreFindFreePagesI (
+ IN UINT64 MaxAddress,
+ IN UINT64 NumberOfPages,
+ IN EFI_MEMORY_TYPE NewType,
+ IN UINTN Alignment
+ )
+/*++
+
+Routine Description:
+
+ Internal function. Finds a consecutive free page range below
+ the requested address.
+
+Arguments:
+
+ MaxAddress - The address that the range must be below
+
+ NumberOfPages - Number of pages needed
+
+ NewType - The type of memory the range is going to be turned into
+
+ Alignment - Bits to align with
+
+Returns:
+
+ The base address of the range, or 0 if the range was not found
+
+--*/
+{
+ UINT64 NumberOfBytes;
+ UINT64 Target;
+ UINT64 DescStart;
+ UINT64 DescEnd;
+ UINT64 DescNumberOfBytes;
+ LIST_ENTRY *Link;
+ MEMORY_MAP *Entry;
+
+ if ((MaxAddress < EFI_PAGE_MASK) ||(NumberOfPages == 0)) {
+ return 0;
+ }
+
+ if ((MaxAddress & EFI_PAGE_MASK) != EFI_PAGE_MASK) {
+
+ //
+ // If MaxAddress is not aligned to the end of a page
+ //
+
+ //
+ // Change MaxAddress to be 1 page lower
+ //
+ MaxAddress -= (EFI_PAGE_MASK + 1);
+
+ //
+ // Set MaxAddress to a page boundary
+ //
+ MaxAddress &= ~EFI_PAGE_MASK;
+
+ //
+ // Set MaxAddress to end of the page
+ //
+ MaxAddress |= EFI_PAGE_MASK;
+ }
+
+ NumberOfBytes = LShiftU64 (NumberOfPages, EFI_PAGE_SHIFT);
+ Target = 0;
+
+ for (Link = gMemoryMap.ForwardLink; Link != &gMemoryMap; Link = Link->ForwardLink) {
+ Entry = CR (Link, MEMORY_MAP, Link, MEMORY_MAP_SIGNATURE);
+
+ //
+ // If it's not a free entry, don't bother with it
+ //
+ if (Entry->Type != EfiConventionalMemory) {
+ continue;
+ }
+
+ DescStart = Entry->Start;
+ DescEnd = Entry->End;
+
+ //
+ // If desc is past max allowed address, skip it
+ //
+ if (DescStart >= MaxAddress) {
+ continue;
+ }
+
+ //
+ // If desc ends past max allowed address, clip the end
+ //
+ if (DescEnd >= MaxAddress) {
+ DescEnd = MaxAddress;
+ }
+
+ DescEnd = ((DescEnd + 1) & (~(Alignment - 1))) - 1;
+
+ //
+ // Compute the number of bytes we can used from this
+ // descriptor, and see it's enough to satisfy the request
+ //
+ DescNumberOfBytes = DescEnd - DescStart + 1;
+
+ if (DescNumberOfBytes >= NumberOfBytes) {
+
+ //
+ // If this is the best match so far remember it
+ //
+ if (DescEnd > Target) {
+ Target = DescEnd;
+ }
+ }
+ }
+
+ //
+ // If this is a grow down, adjust target to be the allocation base
+ //
+ Target -= NumberOfBytes - 1;
+
+ //
+ // If we didn't find a match, return 0
+ //
+ if ((Target & EFI_PAGE_MASK) != 0) {
+ return 0;
+ }
+
+ return Target;
+}
+
+STATIC
+UINT64
+FindFreePages (
+ IN UINT64 MaxAddress,
+ IN UINT64 NoPages,
+ IN EFI_MEMORY_TYPE NewType,
+ IN UINTN Alignment
+ )
+/*++
+
+Routine Description:
+
+ Internal function. Finds a consecutive free page range below
+ the requested address
+
+Arguments:
+
+ MaxAddress - The address that the range must be below
+
+ NoPages - Number of pages needed
+
+ NewType - The type of memory the range is going to be turned into
+
+ Alignment - Bits to align with
+
+Returns:
+
+ The base address of the range, or 0 if the range was not found.
+
+--*/
+{
+ UINT64 NewMaxAddress;
+ UINT64 Start;
+
+ NewMaxAddress = MaxAddress;
+
+ if (NewType >= 0 && NewType < EfiMaxMemoryType && NewMaxAddress >= mMemoryTypeStatistics[NewType].MaximumAddress) {
+ NewMaxAddress = mMemoryTypeStatistics[NewType].MaximumAddress;
+ } else {
+ if (NewMaxAddress > mDefaultMaximumAddress) {
+ NewMaxAddress = mDefaultMaximumAddress;
+ }
+ }
+
+ Start = CoreFindFreePagesI (NewMaxAddress, NoPages, NewType, Alignment);
+ if (!Start) {
+ Start = CoreFindFreePagesI (MaxAddress, NoPages, NewType, Alignment);
+ if (!Start) {
+ //
+ // Here means there may be no enough memory to use, so try to go through
+ // all the memory descript to promote the untested memory directly
+ //
+ PromoteMemoryResource ();
+
+ //
+ // Allocate memory again after the memory resource re-arranged
+ //
+ Start = CoreFindFreePagesI (MaxAddress, NoPages, NewType, Alignment);
+ }
+ }
+
+ return Start;
+}
+
+
+EFI_STATUS
+EFIAPI
+CoreAllocatePages (
+ IN EFI_ALLOCATE_TYPE Type,
+ IN EFI_MEMORY_TYPE MemoryType,
+ IN UINTN NumberOfPages,
+ IN OUT EFI_PHYSICAL_ADDRESS *Memory
+ )
+/*++
+
+Routine Description:
+
+ Allocates pages from the memory map.
+
+Arguments:
+
+ Type - The type of allocation to perform
+
+ MemoryType - The type of memory to turn the allocated pages into
+
+ NumberOfPages - The number of pages to allocate
+
+ Memory - A pointer to receive the base allocated memory address
+
+Returns:
+
+ Status. On success, Memory is filled in with the base address allocated
+
+ EFI_INVALID_PARAMETER - Parameters violate checking rules defined in spec.
+
+ EFI_NOT_FOUND - Could not allocate pages match the requirement.
+
+ EFI_OUT_OF_RESOURCES - No enough pages to allocate.
+
+ EFI_SUCCESS - Pages successfully allocated.
+
+--*/
+{
+ EFI_STATUS Status;
+ UINT64 Start;
+ UINT64 MaxAddress;
+ UINTN Alignment;
+
+ if (Type < AllocateAnyPages || Type >= (UINTN) MaxAllocateType) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if ((MemoryType >= EfiMaxMemoryType && MemoryType <= 0x7fffffff) ||
+ MemoryType == EfiConventionalMemory) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Alignment = EFI_DEFAULT_PAGE_ALLOCATION_ALIGNMENT;
+
+ if (MemoryType == EfiACPIReclaimMemory ||
+ MemoryType == EfiACPIMemoryNVS ||
+ MemoryType == EfiRuntimeServicesCode ||
+ MemoryType == EfiRuntimeServicesData) {
+
+ Alignment = EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT;
+ }
+
+ if (Type == AllocateAddress) {
+ if ((*Memory & (Alignment - 1)) != 0) {
+ return EFI_NOT_FOUND;
+ }
+ }
+
+ NumberOfPages += EFI_SIZE_TO_PAGES (Alignment) - 1;
+ NumberOfPages &= ~(EFI_SIZE_TO_PAGES (Alignment) - 1);
+
+ //
+ // If this is for below a particular address, then
+ //
+ Start = *Memory;
+
+ //
+ // The max address is the max natively addressable address for the processor
+ //
+ MaxAddress = EFI_MAX_ADDRESS;
+
+ if (Type == AllocateMaxAddress) {
+ MaxAddress = Start;
+ }
+
+ CoreAcquireMemoryLock ();
+
+ //
+ // If not a specific address, then find an address to allocate
+ //
+ if (Type != AllocateAddress) {
+ Start = FindFreePages (MaxAddress, NumberOfPages, MemoryType, Alignment);
+ if (Start == 0) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Done;
+ }
+ }
+
+ //
+ // Convert pages from FreeMemory to the requested type
+ //
+ Status = CoreConvertPages (Start, NumberOfPages, MemoryType);
+
+Done:
+ CoreReleaseMemoryLock ();
+
+ if (!EFI_ERROR (Status)) {
+ *Memory = Start;
+ }
+
+ return Status;
+}
+
+
+
+
+EFI_STATUS
+EFIAPI
+CoreFreePages (
+ IN EFI_PHYSICAL_ADDRESS Memory,
+ IN UINTN NumberOfPages
+ )
+/*++
+
+Routine Description:
+
+ Frees previous allocated pages.
+
+Arguments:
+
+ Memory - Base address of memory being freed
+
+ NumberOfPages - The number of pages to free
+
+Returns:
+
+ EFI_NOT_FOUND - Could not find the entry that covers the range
+
+ EFI_INVALID_PARAMETER - Address not aligned
+
+ EFI_SUCCESS -Pages successfully freed.
+
+--*/
+{
+ EFI_STATUS Status;
+ LIST_ENTRY *Link;
+ MEMORY_MAP *Entry;
+ UINTN Alignment;
+
+ //
+ // Free the range
+ //
+ CoreAcquireMemoryLock ();
+
+ //
+ // Find the entry that the covers the range
+ //
+ Entry = NULL;
+ for (Link = gMemoryMap.ForwardLink; Link != &gMemoryMap; Link = Link->ForwardLink) {
+ Entry = CR(Link, MEMORY_MAP, Link, MEMORY_MAP_SIGNATURE);
+ if (Entry->Start <= Memory && Entry->End > Memory) {
+ break;
+ }
+ }
+ if (Link == &gMemoryMap) {
+ CoreReleaseMemoryLock ();
+ return EFI_NOT_FOUND;
+ }
+
+ Alignment = EFI_DEFAULT_PAGE_ALLOCATION_ALIGNMENT;
+
+ if (Entry->Type == EfiACPIReclaimMemory ||
+ Entry->Type == EfiACPIMemoryNVS ||
+ Entry->Type == EfiRuntimeServicesCode ||
+ Entry->Type == EfiRuntimeServicesData) {
+
+ Alignment = EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT;
+
+ }
+
+ if ((Memory & (Alignment - 1)) != 0) {
+ CoreReleaseMemoryLock ();
+ return EFI_INVALID_PARAMETER;
+ }
+
+ NumberOfPages += EFI_SIZE_TO_PAGES (Alignment) - 1;
+ NumberOfPages &= ~(EFI_SIZE_TO_PAGES (Alignment) - 1);
+
+ Status = CoreConvertPages (Memory, NumberOfPages, EfiConventionalMemory);
+
+ CoreReleaseMemoryLock ();
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Destroy the contents
+ //
+ if (Memory < EFI_MAX_ADDRESS) {
+ DEBUG_CLEAR_MEMORY ((VOID *)(UINTN)Memory, NumberOfPages << EFI_PAGE_SHIFT);
+ }
+
+ return Status;
+}
+
+
+
+EFI_STATUS
+EFIAPI
+CoreGetMemoryMap (
+ IN OUT UINTN *MemoryMapSize,
+ IN OUT EFI_MEMORY_DESCRIPTOR *MemoryMap,
+ OUT UINTN *MapKey,
+ OUT UINTN *DescriptorSize,
+ OUT UINT32 *DescriptorVersion
+ )
+/*++
+
+Routine Description:
+
+ This function returns a copy of the current memory map. The map is an array of
+ memory descriptors, each of which describes a contiguous block of memory.
+
+Arguments:
+
+ MemoryMapSize - A pointer to the size, in bytes, of the MemoryMap buffer. On
+ input, this is the size of the buffer allocated by the caller.
+ On output, it is the size of the buffer returned by the firmware
+ if the buffer was large enough, or the size of the buffer needed
+ to contain the map if the buffer was too small.
+ MemoryMap - A pointer to the buffer in which firmware places the current memory map.
+ MapKey - A pointer to the location in which firmware returns the key for the
+ current memory map.
+ DescriptorSize - A pointer to the location in which firmware returns the size, in
+ bytes, of an individual EFI_MEMORY_DESCRIPTOR.
+ DescriptorVersion - A pointer to the location in which firmware returns the version
+ number associated with the EFI_MEMORY_DESCRIPTOR.
+
+Returns:
+
+ EFI_SUCCESS - The memory map was returned in the MemoryMap buffer.
+ EFI_BUFFER_TOO_SMALL - The MemoryMap buffer was too small. The current buffer size
+ needed to hold the memory map is returned in MemoryMapSize.
+ EFI_INVALID_PARAMETER - One of the parameters has an invalid value.
+
+--*/
+{
+ EFI_STATUS Status;
+ UINTN Size;
+ UINTN BufferSize;
+ UINTN NumberOfRuntimeEntries;
+ LIST_ENTRY *Link;
+ MEMORY_MAP *Entry;
+ EFI_GCD_MAP_ENTRY *GcdMapEntry;
+
+ //
+ // Make sure the parameters are valid
+ //
+ if (MemoryMapSize == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ CoreAcquireGcdMemoryLock ();
+
+ //
+ // Count the number of Reserved and MMIO entries that are marked for runtime use
+ //
+ NumberOfRuntimeEntries = 0;
+ 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)) {
+ if ((GcdMapEntry->Attributes & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) {
+ NumberOfRuntimeEntries++;
+ }
+ }
+ }
+
+ Size = sizeof (EFI_MEMORY_DESCRIPTOR);
+
+ //
+ // Make sure Size != sizeof(EFI_MEMORY_DESCRIPTOR). This will
+ // prevent people from having pointer math bugs in their code.
+ // now you have to use *DescriptorSize to make things work.
+ //
+ Size += sizeof(UINT64) - (Size % sizeof (UINT64));
+
+ if (DescriptorSize != NULL) {
+ *DescriptorSize = Size;
+ }
+
+ if (DescriptorVersion != NULL) {
+ *DescriptorVersion = EFI_MEMORY_DESCRIPTOR_VERSION;
+ }
+
+ CoreAcquireMemoryLock ();
+
+ //
+ // Compute the buffer size needed to fit the entire map
+ //
+ BufferSize = Size * NumberOfRuntimeEntries;
+ for (Link = gMemoryMap.ForwardLink; Link != &gMemoryMap; Link = Link->ForwardLink) {
+ BufferSize += Size;
+ }
+
+ if (*MemoryMapSize < BufferSize) {
+ Status = EFI_BUFFER_TOO_SMALL;
+ goto Done;
+ }
+
+ if (MemoryMap == NULL) {
+ Status = EFI_INVALID_PARAMETER;
+ goto Done;
+ }
+
+ //
+ // Build the map
+ //
+ ZeroMem (MemoryMap, Size);
+ for (Link = gMemoryMap.ForwardLink; Link != &gMemoryMap; Link = Link->ForwardLink) {
+ Entry = CR (Link, MEMORY_MAP, Link, MEMORY_MAP_SIGNATURE);
+ ASSERT (Entry->VirtualStart == 0);
+
+ MemoryMap->Type = Entry->Type;
+ MemoryMap->PhysicalStart = Entry->Start;
+ MemoryMap->VirtualStart = Entry->VirtualStart;
+ MemoryMap->NumberOfPages = RShiftU64 (Entry->End - Entry->Start + 1, EFI_PAGE_SHIFT);
+
+ switch (Entry->Type) {
+ case EfiRuntimeServicesCode:
+ case EfiRuntimeServicesData:
+ case EfiPalCode:
+ MemoryMap->Attribute = Entry->Attribute | EFI_MEMORY_RUNTIME;
+ break;
+
+ default:
+ MemoryMap->Attribute = Entry->Attribute;
+ break;
+ }
+
+ MemoryMap = NextMemoryDescriptor (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)) {
+ if ((GcdMapEntry->Attributes & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) {
+
+ MemoryMap->PhysicalStart = GcdMapEntry->BaseAddress;
+ MemoryMap->VirtualStart = 0;
+ MemoryMap->NumberOfPages = MemoryMap->NumberOfPages = RShiftU64 ((GcdMapEntry->EndAddress - GcdMapEntry->BaseAddress + 1), EFI_PAGE_SHIFT);
+ MemoryMap->Attribute = GcdMapEntry->Attributes & ~EFI_MEMORY_PORT_IO;
+
+ if (GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeReserved) {
+ MemoryMap->Type = EfiReservedMemoryType;
+ } else if (GcdMapEntry->GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo) {
+ if ((GcdMapEntry->Attributes & EFI_MEMORY_PORT_IO) == EFI_MEMORY_PORT_IO) {
+ MemoryMap->Type = EfiMemoryMappedIOPortSpace;
+ } else {
+ MemoryMap->Type = EfiMemoryMappedIO;
+ }
+ }
+
+ MemoryMap = NextMemoryDescriptor (MemoryMap, Size);
+ }
+ }
+ }
+
+ Status = EFI_SUCCESS;
+
+Done:
+
+ CoreReleaseMemoryLock ();
+
+ CoreReleaseGcdMemoryLock ();
+
+ //
+ // Update the map key finally
+ //
+ if (MapKey != NULL) {
+ *MapKey = mMemoryMapKey;
+ }
+
+ *MemoryMapSize = BufferSize;
+
+ return Status;
+}
+
+VOID *
+CoreAllocatePoolPages (
+ IN EFI_MEMORY_TYPE PoolType,
+ IN UINTN NumberOfPages,
+ IN UINTN Alignment
+ )
+/*++
+
+Routine Description:
+
+ Internal function. Used by the pool functions to allocate pages
+ to back pool allocation requests.
+
+Arguments:
+
+ PoolType - The type of memory for the new pool pages
+
+ NumberOfPages - No of pages to allocate
+
+ Alignment - Bits to align.
+
+Returns:
+
+ The allocated memory, or NULL
+
+--*/
+{
+ EFI_STATUS Status;
+ UINT64 Start;
+
+ //
+ // Find the pages to convert
+ //
+ Start = FindFreePages (EFI_MAX_ADDRESS, NumberOfPages, PoolType, Alignment);
+
+ //
+ // Convert it to boot services data
+ //
+ if (Start == 0) {
+ DEBUG ((EFI_D_ERROR | EFI_D_PAGE, "AllocatePoolPages: failed to allocate %d pages\n", NumberOfPages));
+ } else {
+ Status = CoreConvertPages (Start, NumberOfPages, PoolType);
+ }
+
+ return (VOID *)(UINTN)Start;
+}
+
+VOID
+CoreFreePoolPages (
+ IN EFI_PHYSICAL_ADDRESS Memory,
+ IN UINTN NumberOfPages
+ )
+/*++
+
+Routine Description:
+
+ Internal function. Frees pool pages allocated via AllocatePoolPages ()
+
+Arguments:
+
+ Memory - The base address to free
+
+ NumberOfPages - The number of pages to free
+
+Returns:
+
+ None
+
+--*/
+{
+ CoreConvertPages (Memory, NumberOfPages, EfiConventionalMemory);
+}
+
+
+EFI_STATUS
+CoreTerminateMemoryMap (
+ IN UINTN MapKey
+ )
+/*++
+
+Routine Description:
+
+ Make sure the memory map is following all the construction rules,
+ it is the last time to check memory map error before exit boot services.
+
+Arguments:
+
+ MapKey - Memory map key
+
+Returns:
+
+ EFI_INVALID_PARAMETER - Memory map not consistent with construction rules.
+
+ EFI_SUCCESS - Valid memory map.
+
+--*/
+{
+ EFI_STATUS Status;
+ LIST_ENTRY *Link;
+ MEMORY_MAP *Entry;
+
+ Status = EFI_SUCCESS;
+
+ CoreAcquireMemoryLock ();
+
+ if (MapKey == mMemoryMapKey) {
+
+ //
+ // Make sure the memory map is following all the construction rules
+ // This is the last chance we will be able to display any messages on
+ // the console devices.
+ //
+
+ for (Link = gMemoryMap.ForwardLink; Link != &gMemoryMap; Link = Link->ForwardLink) {
+ Entry = CR(Link, MEMORY_MAP, Link, MEMORY_MAP_SIGNATURE);
+ if (Entry->Attribute & EFI_MEMORY_RUNTIME) {
+ if (Entry->Type == EfiACPIReclaimMemory || Entry->Type == EfiACPIMemoryNVS) {
+ DEBUG((EFI_D_ERROR, "ExitBootServices: ACPI memory entry has RUNTIME attribute set.\n"));
+ CoreReleaseMemoryLock ();
+ return EFI_INVALID_PARAMETER;
+ }
+ if (Entry->Start & (EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT - 1)) {
+ DEBUG((EFI_D_ERROR, "ExitBootServices: A RUNTIME memory entry is not on a proper alignment.\n"));
+ CoreReleaseMemoryLock ();
+ return EFI_INVALID_PARAMETER;
+ }
+ if ((Entry->End + 1) & (EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT - 1)) {
+ DEBUG((EFI_D_ERROR, "ExitBootServices: A RUNTIME memory entry is not on a proper alignment.\n"));
+ CoreReleaseMemoryLock ();
+ return EFI_INVALID_PARAMETER;
+ }
+ }
+ }
+
+ //
+ // The map key they gave us matches what we expect. Fall through and
+ // return success. In an ideal world we would clear out all of
+ // EfiBootServicesCode and EfiBootServicesData. However this function
+ // is not the last one called by ExitBootServices(), so we have to
+ // preserve the memory contents.
+ //
+ } else {
+ Status = EFI_INVALID_PARAMETER;
+ }
+
+ CoreReleaseMemoryLock ();
+
+ return Status;
+}
+
+
+
+
+
+
+
+
|