2 UEFI Memory page management functions.
4 Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
18 #define EFI_DEFAULT_PAGE_ALLOCATION_ALIGNMENT (EFI_PAGE_SIZE)
21 // Entry for tracking the memory regions for each memory type to coalesce similar memory types
24 EFI_PHYSICAL_ADDRESS BaseAddress
;
25 EFI_PHYSICAL_ADDRESS MaximumAddress
;
26 UINT64 CurrentNumberOfPages
;
28 UINTN InformationIndex
;
31 } EFI_MEMORY_TYPE_STAISTICS
;
34 // MemoryMap - The current memory map
36 UINTN mMemoryMapKey
= 0;
38 #define MAX_MAP_DEPTH 6
41 /// mMapDepth - depth of new descriptor stack
45 /// mMapStack - space to use as temp storage to build new map descriptors
47 MEMORY_MAP mMapStack
[MAX_MAP_DEPTH
];
48 UINTN mFreeMapStack
= 0;
50 /// This list maintain the free memory map list
52 LIST_ENTRY mFreeMemoryMapEntryList
= INITIALIZE_LIST_HEAD_VARIABLE (mFreeMemoryMapEntryList
);
53 BOOLEAN mMemoryTypeInformationInitialized
= FALSE
;
55 EFI_MEMORY_TYPE_STAISTICS mMemoryTypeStatistics
[EfiMaxMemoryType
+ 1] = {
56 { 0, MAX_ADDRESS
, 0, 0, EfiMaxMemoryType
, TRUE
, FALSE
}, // EfiReservedMemoryType
57 { 0, MAX_ADDRESS
, 0, 0, EfiMaxMemoryType
, FALSE
, FALSE
}, // EfiLoaderCode
58 { 0, MAX_ADDRESS
, 0, 0, EfiMaxMemoryType
, FALSE
, FALSE
}, // EfiLoaderData
59 { 0, MAX_ADDRESS
, 0, 0, EfiMaxMemoryType
, FALSE
, FALSE
}, // EfiBootServicesCode
60 { 0, MAX_ADDRESS
, 0, 0, EfiMaxMemoryType
, FALSE
, FALSE
}, // EfiBootServicesData
61 { 0, MAX_ADDRESS
, 0, 0, EfiMaxMemoryType
, TRUE
, TRUE
}, // EfiRuntimeServicesCode
62 { 0, MAX_ADDRESS
, 0, 0, EfiMaxMemoryType
, TRUE
, TRUE
}, // EfiRuntimeServicesData
63 { 0, MAX_ADDRESS
, 0, 0, EfiMaxMemoryType
, FALSE
, FALSE
}, // EfiConventionalMemory
64 { 0, MAX_ADDRESS
, 0, 0, EfiMaxMemoryType
, FALSE
, FALSE
}, // EfiUnusableMemory
65 { 0, MAX_ADDRESS
, 0, 0, EfiMaxMemoryType
, TRUE
, FALSE
}, // EfiACPIReclaimMemory
66 { 0, MAX_ADDRESS
, 0, 0, EfiMaxMemoryType
, TRUE
, FALSE
}, // EfiACPIMemoryNVS
67 { 0, MAX_ADDRESS
, 0, 0, EfiMaxMemoryType
, FALSE
, FALSE
}, // EfiMemoryMappedIO
68 { 0, MAX_ADDRESS
, 0, 0, EfiMaxMemoryType
, FALSE
, FALSE
}, // EfiMemoryMappedIOPortSpace
69 { 0, MAX_ADDRESS
, 0, 0, EfiMaxMemoryType
, TRUE
, TRUE
}, // EfiPalCode
70 { 0, MAX_ADDRESS
, 0, 0, EfiMaxMemoryType
, FALSE
, FALSE
} // EfiMaxMemoryType
73 EFI_PHYSICAL_ADDRESS mDefaultMaximumAddress
= MAX_ADDRESS
;
74 EFI_PHYSICAL_ADDRESS mDefaultBaseAddress
= MAX_ADDRESS
;
76 EFI_MEMORY_TYPE_INFORMATION gMemoryTypeInformation
[EfiMaxMemoryType
+ 1] = {
77 { EfiReservedMemoryType
, 0 },
80 { EfiBootServicesCode
, 0 },
81 { EfiBootServicesData
, 0 },
82 { EfiRuntimeServicesCode
, 0 },
83 { EfiRuntimeServicesData
, 0 },
84 { EfiConventionalMemory
, 0 },
85 { EfiUnusableMemory
, 0 },
86 { EfiACPIReclaimMemory
, 0 },
87 { EfiACPIMemoryNVS
, 0 },
88 { EfiMemoryMappedIO
, 0 },
89 { EfiMemoryMappedIOPortSpace
, 0 },
91 { EfiMaxMemoryType
, 0 }
94 // Only used when load module at fixed address feature is enabled. True means the memory is alreay successfully allocated
95 // and ready to load the module in to specified address.or else, the memory is not ready and module will be loaded at a
96 // address assigned by DXE core.
98 GLOBAL_REMOVE_IF_UNREFERENCED BOOLEAN gLoadFixedAddressCodeMemoryReady
= FALSE
;
101 Enter critical section by gaining lock on gMemoryLock.
105 CoreAcquireMemoryLock (
109 CoreAcquireLock (&gMemoryLock
);
115 Exit critical section by releasing lock on gMemoryLock.
119 CoreReleaseMemoryLock (
123 CoreReleaseLock (&gMemoryLock
);
130 Internal function. Removes a descriptor entry.
132 @param Entry The entry to remove
136 RemoveMemoryMapEntry (
137 IN OUT MEMORY_MAP
*Entry
140 RemoveEntryList (&Entry
->Link
);
141 Entry
->Link
.ForwardLink
= NULL
;
143 if (Entry
->FromPages
) {
145 // Insert the free memory map descriptor to the end of mFreeMemoryMapEntryList
147 InsertTailList (&mFreeMemoryMapEntryList
, &Entry
->Link
);
152 Internal function. Adds a ranges to the memory map.
153 The range must not already exist in the map.
155 @param Type The type of memory range to add
156 @param Start The starting address in the memory range Must be
158 @param End The last address in the range Must be the last
160 @param Attribute The attributes of the memory range to add
165 IN EFI_MEMORY_TYPE Type
,
166 IN EFI_PHYSICAL_ADDRESS Start
,
167 IN EFI_PHYSICAL_ADDRESS End
,
174 ASSERT ((Start
& EFI_PAGE_MASK
) == 0);
175 ASSERT (End
> Start
) ;
177 ASSERT_LOCKED (&gMemoryLock
);
179 DEBUG ((DEBUG_PAGE
, "AddRange: %lx-%lx to %d\n", Start
, End
, Type
));
182 // Memory map being altered so updated key
187 // UEFI 2.0 added an event group for notificaiton on memory map changes.
188 // So we need to signal this Event Group every time the memory map changes.
189 // If we are in EFI 1.10 compatability mode no event groups will be
190 // found and nothing will happen we we call this function. These events
191 // will get signaled but since a lock is held around the call to this
192 // function the notificaiton events will only be called after this funciton
193 // returns and the lock is released.
195 CoreNotifySignalList (&gEfiEventMemoryMapChangeGuid
);
198 // Look for adjoining memory descriptor
201 // Two memory descriptors can only be merged if they have the same Type
202 // and the same Attribute
205 Link
= gMemoryMap
.ForwardLink
;
206 while (Link
!= &gMemoryMap
) {
207 Entry
= CR (Link
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
208 Link
= Link
->ForwardLink
;
210 if (Entry
->Type
!= Type
) {
214 if (Entry
->Attribute
!= Attribute
) {
218 if (Entry
->End
+ 1 == Start
) {
220 Start
= Entry
->Start
;
221 RemoveMemoryMapEntry (Entry
);
223 } else if (Entry
->Start
== End
+ 1) {
226 RemoveMemoryMapEntry (Entry
);
234 mMapStack
[mMapDepth
].Signature
= MEMORY_MAP_SIGNATURE
;
235 mMapStack
[mMapDepth
].FromPages
= FALSE
;
236 mMapStack
[mMapDepth
].Type
= Type
;
237 mMapStack
[mMapDepth
].Start
= Start
;
238 mMapStack
[mMapDepth
].End
= End
;
239 mMapStack
[mMapDepth
].VirtualStart
= 0;
240 mMapStack
[mMapDepth
].Attribute
= Attribute
;
241 InsertTailList (&gMemoryMap
, &mMapStack
[mMapDepth
].Link
);
244 ASSERT (mMapDepth
< MAX_MAP_DEPTH
);
250 Internal function. Deque a descriptor entry from the mFreeMemoryMapEntryList.
251 If the list is emtry, then allocate a new page to refuel the list.
252 Please Note this algorithm to allocate the memory map descriptor has a property
253 that the memory allocated for memory entries always grows, and will never really be freed
254 For example, if the current boot uses 2000 memory map entries at the maximum point, but
255 ends up with only 50 at the time the OS is booted, then the memory associated with the 1950
256 memory map entries is still allocated from EfiBootServicesMemory.
259 @return The Memory map descriptor dequed from the mFreeMemoryMapEntryList
263 AllocateMemoryMapEntry (
267 MEMORY_MAP
* FreeDescriptorEntries
;
271 if (IsListEmpty (&mFreeMemoryMapEntryList
)) {
273 // The list is empty, to allocate one page to refuel the list
275 FreeDescriptorEntries
= CoreAllocatePoolPages (EfiBootServicesData
, EFI_SIZE_TO_PAGES(DEFAULT_PAGE_ALLOCATION
), DEFAULT_PAGE_ALLOCATION
);
276 if(FreeDescriptorEntries
!= NULL
) {
278 // Enque the free memmory map entries into the list
280 for (Index
= 0; Index
< DEFAULT_PAGE_ALLOCATION
/ sizeof(MEMORY_MAP
); Index
++) {
281 FreeDescriptorEntries
[Index
].Signature
= MEMORY_MAP_SIGNATURE
;
282 InsertTailList (&mFreeMemoryMapEntryList
, &FreeDescriptorEntries
[Index
].Link
);
289 // dequeue the first descriptor from the list
291 Entry
= CR (mFreeMemoryMapEntryList
.ForwardLink
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
292 RemoveEntryList (&Entry
->Link
);
299 Internal function. Moves any memory descriptors that are on the
300 temporary descriptor stack to heap.
304 CoreFreeMemoryMapStack (
312 ASSERT_LOCKED (&gMemoryLock
);
315 // If already freeing the map stack, then return
317 if (mFreeMapStack
!= 0) {
322 // Move the temporary memory descriptor stack into pool
326 while (mMapDepth
!= 0) {
328 // Deque an memory map entry from mFreeMemoryMapEntryList
330 Entry
= AllocateMemoryMapEntry ();
335 // Update to proper entry
339 if (mMapStack
[mMapDepth
].Link
.ForwardLink
!= NULL
) {
342 // Move this entry to general memory
344 RemoveEntryList (&mMapStack
[mMapDepth
].Link
);
345 mMapStack
[mMapDepth
].Link
.ForwardLink
= NULL
;
347 CopyMem (Entry
, &mMapStack
[mMapDepth
], sizeof (MEMORY_MAP
));
348 Entry
->FromPages
= TRUE
;
351 // Find insertion location
353 for (Link2
= gMemoryMap
.ForwardLink
; Link2
!= &gMemoryMap
; Link2
= Link2
->ForwardLink
) {
354 Entry2
= CR (Link2
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
355 if (Entry2
->FromPages
&& Entry2
->Start
> Entry
->Start
) {
360 InsertTailList (Link2
, &Entry
->Link
);
364 // This item of mMapStack[mMapDepth] has already been dequeued from gMemoryMap list,
365 // so here no need to move it to memory.
367 InsertTailList (&mFreeMemoryMapEntryList
, &Entry
->Link
);
375 Find untested but initialized memory regions in GCD map and convert them to be DXE allocatable.
379 PromoteMemoryResource (
384 EFI_GCD_MAP_ENTRY
*Entry
;
387 DEBUG ((DEBUG_PAGE
, "Promote the memory resource\n"));
389 CoreAcquireGcdMemoryLock ();
392 Link
= mGcdMemorySpaceMap
.ForwardLink
;
393 while (Link
!= &mGcdMemorySpaceMap
) {
395 Entry
= CR (Link
, EFI_GCD_MAP_ENTRY
, Link
, EFI_GCD_MAP_SIGNATURE
);
397 if (Entry
->GcdMemoryType
== EfiGcdMemoryTypeReserved
&&
398 Entry
->EndAddress
< MAX_ADDRESS
&&
399 (Entry
->Capabilities
& (EFI_MEMORY_PRESENT
| EFI_MEMORY_INITIALIZED
| EFI_MEMORY_TESTED
)) ==
400 (EFI_MEMORY_PRESENT
| EFI_MEMORY_INITIALIZED
)) {
402 // Update the GCD map
404 Entry
->GcdMemoryType
= EfiGcdMemoryTypeSystemMemory
;
405 Entry
->Capabilities
|= EFI_MEMORY_TESTED
;
406 Entry
->ImageHandle
= gDxeCoreImageHandle
;
407 Entry
->DeviceHandle
= NULL
;
410 // Add to allocable system memory resource
414 EfiConventionalMemory
,
417 Entry
->Capabilities
& ~(EFI_MEMORY_PRESENT
| EFI_MEMORY_INITIALIZED
| EFI_MEMORY_TESTED
| EFI_MEMORY_RUNTIME
)
419 CoreFreeMemoryMapStack ();
424 Link
= Link
->ForwardLink
;
427 CoreReleaseGcdMemoryLock ();
432 This function try to allocate Runtime code & Boot time code memory range. If LMFA enabled, 2 patchable PCD
433 PcdLoadFixAddressRuntimeCodePageNumber & PcdLoadFixAddressBootTimeCodePageNumber which are set by tools will record the
434 size of boot time and runtime code.
438 CoreLoadingFixedAddressHook (
442 UINT32 RuntimeCodePageNumber
;
443 UINT32 BootTimeCodePageNumber
;
444 EFI_PHYSICAL_ADDRESS RuntimeCodeBase
;
445 EFI_PHYSICAL_ADDRESS BootTimeCodeBase
;
449 // Make sure these 2 areas are not initialzied.
451 if (!gLoadFixedAddressCodeMemoryReady
) {
452 RuntimeCodePageNumber
= PcdGet32(PcdLoadFixAddressRuntimeCodePageNumber
);
453 BootTimeCodePageNumber
= PcdGet32(PcdLoadFixAddressBootTimeCodePageNumber
);
454 RuntimeCodeBase
= (EFI_PHYSICAL_ADDRESS
)(gLoadModuleAtFixAddressConfigurationTable
.DxeCodeTopAddress
- EFI_PAGES_TO_SIZE (RuntimeCodePageNumber
));
455 BootTimeCodeBase
= (EFI_PHYSICAL_ADDRESS
)(RuntimeCodeBase
- EFI_PAGES_TO_SIZE (BootTimeCodePageNumber
));
457 // Try to allocate runtime memory.
459 Status
= CoreAllocatePages (
461 EfiRuntimeServicesCode
,
462 RuntimeCodePageNumber
,
465 if (EFI_ERROR(Status
)) {
467 // Runtime memory allocation failed
472 // Try to allocate boot memory.
474 Status
= CoreAllocatePages (
477 BootTimeCodePageNumber
,
480 if (EFI_ERROR(Status
)) {
482 // boot memory allocation failed. Free Runtime code range and will try the allocation again when
483 // new memory range is installed.
487 RuntimeCodePageNumber
491 gLoadFixedAddressCodeMemoryReady
= TRUE
;
497 Called to initialize the memory map and add descriptors to
498 the current descriptor list.
499 The first descriptor that is added must be general usable
500 memory as the addition allocates heap.
502 @param Type The type of memory to add
503 @param Start The starting address in the memory range Must be
505 @param NumberOfPages The number of pages in the range
506 @param Attribute Attributes of the memory to add
508 @return None. The range is added to the memory map
512 CoreAddMemoryDescriptor (
513 IN EFI_MEMORY_TYPE Type
,
514 IN EFI_PHYSICAL_ADDRESS Start
,
515 IN UINT64 NumberOfPages
,
519 EFI_PHYSICAL_ADDRESS End
;
524 if ((Start
& EFI_PAGE_MASK
) != 0) {
528 if (Type
>= EfiMaxMemoryType
&& Type
<= 0x7fffffff) {
531 CoreAcquireMemoryLock ();
532 End
= Start
+ LShiftU64 (NumberOfPages
, EFI_PAGE_SHIFT
) - 1;
533 CoreAddRange (Type
, Start
, End
, Attribute
);
534 CoreFreeMemoryMapStack ();
535 CoreReleaseMemoryLock ();
538 // If Loading Module At Fixed Address feature is enabled. try to allocate memory with Runtime code & Boot time code type
540 if (PcdGet64(PcdLoadModuleAtFixAddressEnable
) != 0) {
541 CoreLoadingFixedAddressHook();
545 // Check to see if the statistics for the different memory types have already been established
547 if (mMemoryTypeInformationInitialized
) {
553 // Loop through each memory type in the order specified by the gMemoryTypeInformation[] array
555 for (Index
= 0; gMemoryTypeInformation
[Index
].Type
!= EfiMaxMemoryType
; Index
++) {
557 // Make sure the memory type in the gMemoryTypeInformation[] array is valid
559 Type
= (EFI_MEMORY_TYPE
) (gMemoryTypeInformation
[Index
].Type
);
560 if (Type
< 0 || Type
> EfiMaxMemoryType
) {
563 if (gMemoryTypeInformation
[Index
].NumberOfPages
!= 0) {
565 // Allocate pages for the current memory type from the top of available memory
567 Status
= CoreAllocatePages (
570 gMemoryTypeInformation
[Index
].NumberOfPages
,
571 &mMemoryTypeStatistics
[Type
].BaseAddress
573 if (EFI_ERROR (Status
)) {
575 // If an error occurs allocating the pages for the current memory type, then
576 // free all the pages allocates for the previous memory types and return. This
577 // operation with be retied when/if more memory is added to the system
579 for (FreeIndex
= 0; FreeIndex
< Index
; FreeIndex
++) {
581 // Make sure the memory type in the gMemoryTypeInformation[] array is valid
583 Type
= (EFI_MEMORY_TYPE
) (gMemoryTypeInformation
[FreeIndex
].Type
);
584 if (Type
< 0 || Type
> EfiMaxMemoryType
) {
588 if (gMemoryTypeInformation
[FreeIndex
].NumberOfPages
!= 0) {
590 mMemoryTypeStatistics
[Type
].BaseAddress
,
591 gMemoryTypeInformation
[FreeIndex
].NumberOfPages
593 mMemoryTypeStatistics
[Type
].BaseAddress
= 0;
594 mMemoryTypeStatistics
[Type
].MaximumAddress
= MAX_ADDRESS
;
601 // Compute the address at the top of the current statistics
603 mMemoryTypeStatistics
[Type
].MaximumAddress
=
604 mMemoryTypeStatistics
[Type
].BaseAddress
+
605 LShiftU64 (gMemoryTypeInformation
[Index
].NumberOfPages
, EFI_PAGE_SHIFT
) - 1;
608 // If the current base address is the lowest address so far, then update the default
611 if (mMemoryTypeStatistics
[Type
].BaseAddress
< mDefaultMaximumAddress
) {
612 mDefaultMaximumAddress
= mMemoryTypeStatistics
[Type
].BaseAddress
- 1;
618 // There was enough system memory for all the the memory types were allocated. So,
619 // those memory areas can be freed for future allocations, and all future memory
620 // allocations can occur within their respective bins
622 for (Index
= 0; gMemoryTypeInformation
[Index
].Type
!= EfiMaxMemoryType
; Index
++) {
624 // Make sure the memory type in the gMemoryTypeInformation[] array is valid
626 Type
= (EFI_MEMORY_TYPE
) (gMemoryTypeInformation
[Index
].Type
);
627 if (Type
< 0 || Type
> EfiMaxMemoryType
) {
630 if (gMemoryTypeInformation
[Index
].NumberOfPages
!= 0) {
632 mMemoryTypeStatistics
[Type
].BaseAddress
,
633 gMemoryTypeInformation
[Index
].NumberOfPages
635 mMemoryTypeStatistics
[Type
].NumberOfPages
= gMemoryTypeInformation
[Index
].NumberOfPages
;
636 gMemoryTypeInformation
[Index
].NumberOfPages
= 0;
641 // If the number of pages reserved for a memory type is 0, then all allocations for that type
642 // should be in the default range.
644 for (Type
= (EFI_MEMORY_TYPE
) 0; Type
< EfiMaxMemoryType
; Type
++) {
645 for (Index
= 0; gMemoryTypeInformation
[Index
].Type
!= EfiMaxMemoryType
; Index
++) {
646 if (Type
== (EFI_MEMORY_TYPE
)gMemoryTypeInformation
[Index
].Type
) {
647 mMemoryTypeStatistics
[Type
].InformationIndex
= Index
;
650 mMemoryTypeStatistics
[Type
].CurrentNumberOfPages
= 0;
651 if (mMemoryTypeStatistics
[Type
].MaximumAddress
== MAX_ADDRESS
) {
652 mMemoryTypeStatistics
[Type
].MaximumAddress
= mDefaultMaximumAddress
;
656 mMemoryTypeInformationInitialized
= TRUE
;
661 Internal function. Converts a memory range to the specified type.
662 The range must exist in the memory map.
664 @param Start The first address of the range Must be page
666 @param NumberOfPages The number of pages to convert
667 @param NewType The new type for the memory range
669 @retval EFI_INVALID_PARAMETER Invalid parameter
670 @retval EFI_NOT_FOUND Could not find a descriptor cover the specified
671 range or convertion not allowed.
672 @retval EFI_SUCCESS Successfully converts the memory range to the
679 IN UINT64 NumberOfPages
,
680 IN EFI_MEMORY_TYPE NewType
684 UINT64 NumberOfBytes
;
692 NumberOfBytes
= LShiftU64 (NumberOfPages
, EFI_PAGE_SHIFT
);
693 End
= Start
+ NumberOfBytes
- 1;
695 ASSERT (NumberOfPages
);
696 ASSERT ((Start
& EFI_PAGE_MASK
) == 0);
697 ASSERT (End
> Start
) ;
698 ASSERT_LOCKED (&gMemoryLock
);
700 if (NumberOfPages
== 0 || ((Start
& EFI_PAGE_MASK
) != 0) || (Start
> (Start
+ NumberOfBytes
))) {
701 return EFI_INVALID_PARAMETER
;
705 // Convert the entire range
708 while (Start
< End
) {
711 // Find the entry that the covers the range
713 for (Link
= gMemoryMap
.ForwardLink
; Link
!= &gMemoryMap
; Link
= Link
->ForwardLink
) {
714 Entry
= CR (Link
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
716 if (Entry
->Start
<= Start
&& Entry
->End
> Start
) {
721 if (Link
== &gMemoryMap
) {
722 DEBUG ((DEBUG_ERROR
| DEBUG_PAGE
, "ConvertPages: failed to find range %lx - %lx\n", Start
, End
));
723 return EFI_NOT_FOUND
;
727 // Convert range to the end, or to the end of the descriptor
728 // if that's all we've got
732 ASSERT (Entry
!= NULL
);
733 if (Entry
->End
< End
) {
734 RangeEnd
= Entry
->End
;
737 DEBUG ((DEBUG_PAGE
, "ConvertRange: %lx-%lx to %d\n", Start
, RangeEnd
, NewType
));
740 // Debug code - verify conversion is allowed
742 if (!(NewType
== EfiConventionalMemory
? 1 : 0) ^ (Entry
->Type
== EfiConventionalMemory
? 1 : 0)) {
743 DEBUG ((DEBUG_ERROR
| DEBUG_PAGE
, "ConvertPages: Incompatible memory types\n"));
744 return EFI_NOT_FOUND
;
748 // Update counters for the number of pages allocated to each memory type
750 if (Entry
->Type
>= 0 && Entry
->Type
< EfiMaxMemoryType
) {
751 if ((Start
>= mMemoryTypeStatistics
[Entry
->Type
].BaseAddress
&& Start
<= mMemoryTypeStatistics
[Entry
->Type
].MaximumAddress
) ||
752 (Start
>= mDefaultBaseAddress
&& Start
<= mDefaultMaximumAddress
) ) {
753 if (NumberOfPages
> mMemoryTypeStatistics
[Entry
->Type
].CurrentNumberOfPages
) {
754 mMemoryTypeStatistics
[Entry
->Type
].CurrentNumberOfPages
= 0;
756 mMemoryTypeStatistics
[Entry
->Type
].CurrentNumberOfPages
-= NumberOfPages
;
761 if (NewType
>= 0 && NewType
< EfiMaxMemoryType
) {
762 if ((Start
>= mMemoryTypeStatistics
[NewType
].BaseAddress
&& Start
<= mMemoryTypeStatistics
[NewType
].MaximumAddress
) ||
763 (Start
>= mDefaultBaseAddress
&& Start
<= mDefaultMaximumAddress
) ) {
764 mMemoryTypeStatistics
[NewType
].CurrentNumberOfPages
+= NumberOfPages
;
765 if (mMemoryTypeStatistics
[NewType
].CurrentNumberOfPages
> gMemoryTypeInformation
[mMemoryTypeStatistics
[NewType
].InformationIndex
].NumberOfPages
) {
766 gMemoryTypeInformation
[mMemoryTypeStatistics
[NewType
].InformationIndex
].NumberOfPages
= (UINT32
)mMemoryTypeStatistics
[NewType
].CurrentNumberOfPages
;
772 // Pull range out of descriptor
774 if (Entry
->Start
== Start
) {
779 Entry
->Start
= RangeEnd
+ 1;
781 } else if (Entry
->End
== RangeEnd
) {
786 Entry
->End
= Start
- 1;
791 // Pull it out of the center, clip current
797 mMapStack
[mMapDepth
].Signature
= MEMORY_MAP_SIGNATURE
;
798 mMapStack
[mMapDepth
].FromPages
= FALSE
;
799 mMapStack
[mMapDepth
].Type
= Entry
->Type
;
800 mMapStack
[mMapDepth
].Start
= RangeEnd
+1;
801 mMapStack
[mMapDepth
].End
= Entry
->End
;
804 // Inherit Attribute from the Memory Descriptor that is being clipped
806 mMapStack
[mMapDepth
].Attribute
= Entry
->Attribute
;
808 Entry
->End
= Start
- 1;
809 ASSERT (Entry
->Start
< Entry
->End
);
811 Entry
= &mMapStack
[mMapDepth
];
812 InsertTailList (&gMemoryMap
, &Entry
->Link
);
815 ASSERT (mMapDepth
< MAX_MAP_DEPTH
);
819 // The new range inherits the same Attribute as the Entry
820 //it is being cut out of
822 Attribute
= Entry
->Attribute
;
825 // If the descriptor is empty, then remove it from the map
827 if (Entry
->Start
== Entry
->End
+ 1) {
828 RemoveMemoryMapEntry (Entry
);
833 // Add our new range in
835 CoreAddRange (NewType
, Start
, RangeEnd
, Attribute
);
836 if (NewType
== EfiConventionalMemory
) {
837 DEBUG_CLEAR_MEMORY ((VOID
*)(UINTN
) Start
, (UINTN
) (RangeEnd
- Start
+ 1));
841 // Move any map descriptor stack to general pool
843 CoreFreeMemoryMapStack ();
846 // Bump the starting address, and convert the next range
848 Start
= RangeEnd
+ 1;
852 // Converted the whole range, done
861 Internal function. Finds a consecutive free page range below
862 the requested address.
864 @param MaxAddress The address that the range must be below
865 @param NumberOfPages Number of pages needed
866 @param NewType The type of memory the range is going to be
868 @param Alignment Bits to align with
870 @return The base address of the range, or 0 if the range was not found
875 IN UINT64 MaxAddress
,
876 IN UINT64 MinAddress
,
877 IN UINT64 NumberOfPages
,
878 IN EFI_MEMORY_TYPE NewType
,
882 UINT64 NumberOfBytes
;
886 UINT64 DescNumberOfBytes
;
890 if ((MaxAddress
< EFI_PAGE_MASK
) ||(NumberOfPages
== 0)) {
894 if ((MaxAddress
& EFI_PAGE_MASK
) != EFI_PAGE_MASK
) {
897 // If MaxAddress is not aligned to the end of a page
901 // Change MaxAddress to be 1 page lower
903 MaxAddress
-= (EFI_PAGE_MASK
+ 1);
906 // Set MaxAddress to a page boundary
908 MaxAddress
&= ~EFI_PAGE_MASK
;
911 // Set MaxAddress to end of the page
913 MaxAddress
|= EFI_PAGE_MASK
;
916 NumberOfBytes
= LShiftU64 (NumberOfPages
, EFI_PAGE_SHIFT
);
919 for (Link
= gMemoryMap
.ForwardLink
; Link
!= &gMemoryMap
; Link
= Link
->ForwardLink
) {
920 Entry
= CR (Link
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
923 // If it's not a free entry, don't bother with it
925 if (Entry
->Type
!= EfiConventionalMemory
) {
929 DescStart
= Entry
->Start
;
930 DescEnd
= Entry
->End
;
933 // If desc is past max allowed address or below min allowed address, skip it
935 if ((DescStart
>= MaxAddress
) || (DescEnd
< MinAddress
)) {
940 // If desc ends past max allowed address, clip the end
942 if (DescEnd
>= MaxAddress
) {
943 DescEnd
= MaxAddress
;
946 DescEnd
= ((DescEnd
+ 1) & (~(Alignment
- 1))) - 1;
949 // Compute the number of bytes we can used from this
950 // descriptor, and see it's enough to satisfy the request
952 DescNumberOfBytes
= DescEnd
- DescStart
+ 1;
954 if (DescNumberOfBytes
>= NumberOfBytes
) {
956 // If the start of the allocated range is below the min address allowed, skip it
958 if ((DescEnd
- NumberOfBytes
+ 1) < MinAddress
) {
963 // If this is the best match so far remember it
965 if (DescEnd
> Target
) {
972 // If this is a grow down, adjust target to be the allocation base
974 Target
-= NumberOfBytes
- 1;
977 // If we didn't find a match, return 0
979 if ((Target
& EFI_PAGE_MASK
) != 0) {
988 Internal function. Finds a consecutive free page range below
989 the requested address
991 @param MaxAddress The address that the range must be below
992 @param NoPages Number of pages needed
993 @param NewType The type of memory the range is going to be
995 @param Alignment Bits to align with
997 @return The base address of the range, or 0 if the range was not found.
1002 IN UINT64 MaxAddress
,
1004 IN EFI_MEMORY_TYPE NewType
,
1011 // Attempt to find free pages in the preferred bin based on the requested memory type
1013 if (NewType
>= 0 && NewType
< EfiMaxMemoryType
&& MaxAddress
>= mMemoryTypeStatistics
[NewType
].MaximumAddress
) {
1014 Start
= CoreFindFreePagesI (
1015 mMemoryTypeStatistics
[NewType
].MaximumAddress
,
1016 mMemoryTypeStatistics
[NewType
].BaseAddress
,
1027 // Attempt to find free pages in the default allocation bin
1029 if (MaxAddress
>= mDefaultMaximumAddress
) {
1030 Start
= CoreFindFreePagesI (mDefaultMaximumAddress
, 0, NoPages
, NewType
, Alignment
);
1032 if (Start
< mDefaultBaseAddress
) {
1033 mDefaultBaseAddress
= Start
;
1040 // The allocation did not succeed in any of the prefered bins even after
1041 // promoting resources. Attempt to find free pages anywhere is the requested
1042 // address range. If this allocation fails, then there are not enough
1043 // resources anywhere to satisfy the request.
1045 Start
= CoreFindFreePagesI (MaxAddress
, 0, NoPages
, NewType
, Alignment
);
1051 // If allocations from the preferred bins fail, then attempt to promote memory resources.
1053 if (!PromoteMemoryResource ()) {
1058 // If any memory resources were promoted, then re-attempt the allocation
1060 return FindFreePages (MaxAddress
, NoPages
, NewType
, Alignment
);
1065 Allocates pages from the memory map.
1067 @param Type The type of allocation to perform
1068 @param MemoryType The type of memory to turn the allocated pages
1070 @param NumberOfPages The number of pages to allocate
1071 @param Memory A pointer to receive the base allocated memory
1074 @return Status. On success, Memory is filled in with the base address allocated
1075 @retval EFI_INVALID_PARAMETER Parameters violate checking rules defined in
1077 @retval EFI_NOT_FOUND Could not allocate pages match the requirement.
1078 @retval EFI_OUT_OF_RESOURCES No enough pages to allocate.
1079 @retval EFI_SUCCESS Pages successfully allocated.
1085 IN EFI_ALLOCATE_TYPE Type
,
1086 IN EFI_MEMORY_TYPE MemoryType
,
1087 IN UINTN NumberOfPages
,
1088 IN OUT EFI_PHYSICAL_ADDRESS
*Memory
1096 if (Type
< AllocateAnyPages
|| Type
>= (UINTN
) MaxAllocateType
) {
1097 return EFI_INVALID_PARAMETER
;
1100 if ((MemoryType
>= EfiMaxMemoryType
&& MemoryType
<= 0x7fffffff) ||
1101 MemoryType
== EfiConventionalMemory
) {
1102 return EFI_INVALID_PARAMETER
;
1105 Alignment
= EFI_DEFAULT_PAGE_ALLOCATION_ALIGNMENT
;
1107 if (MemoryType
== EfiACPIReclaimMemory
||
1108 MemoryType
== EfiACPIMemoryNVS
||
1109 MemoryType
== EfiRuntimeServicesCode
||
1110 MemoryType
== EfiRuntimeServicesData
) {
1112 Alignment
= EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT
;
1115 if (Type
== AllocateAddress
) {
1116 if ((*Memory
& (Alignment
- 1)) != 0) {
1117 return EFI_NOT_FOUND
;
1121 NumberOfPages
+= EFI_SIZE_TO_PAGES (Alignment
) - 1;
1122 NumberOfPages
&= ~(EFI_SIZE_TO_PAGES (Alignment
) - 1);
1125 // If this is for below a particular address, then
1130 // The max address is the max natively addressable address for the processor
1132 MaxAddress
= MAX_ADDRESS
;
1134 if (Type
== AllocateMaxAddress
) {
1138 CoreAcquireMemoryLock ();
1141 // If not a specific address, then find an address to allocate
1143 if (Type
!= AllocateAddress
) {
1144 Start
= FindFreePages (MaxAddress
, NumberOfPages
, MemoryType
, Alignment
);
1146 Status
= EFI_OUT_OF_RESOURCES
;
1152 // Convert pages from FreeMemory to the requested type
1154 Status
= CoreConvertPages (Start
, NumberOfPages
, MemoryType
);
1157 CoreReleaseMemoryLock ();
1159 if (!EFI_ERROR (Status
)) {
1168 Frees previous allocated pages.
1170 @param Memory Base address of memory being freed
1171 @param NumberOfPages The number of pages to free
1173 @retval EFI_NOT_FOUND Could not find the entry that covers the range
1174 @retval EFI_INVALID_PARAMETER Address not aligned
1175 @return EFI_SUCCESS -Pages successfully freed.
1181 IN EFI_PHYSICAL_ADDRESS Memory
,
1182 IN UINTN NumberOfPages
1193 CoreAcquireMemoryLock ();
1196 // Find the entry that the covers the range
1199 for (Link
= gMemoryMap
.ForwardLink
; Link
!= &gMemoryMap
; Link
= Link
->ForwardLink
) {
1200 Entry
= CR(Link
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
1201 if (Entry
->Start
<= Memory
&& Entry
->End
> Memory
) {
1205 if (Link
== &gMemoryMap
) {
1206 Status
= EFI_NOT_FOUND
;
1210 Alignment
= EFI_DEFAULT_PAGE_ALLOCATION_ALIGNMENT
;
1212 ASSERT (Entry
!= NULL
);
1213 if (Entry
->Type
== EfiACPIReclaimMemory
||
1214 Entry
->Type
== EfiACPIMemoryNVS
||
1215 Entry
->Type
== EfiRuntimeServicesCode
||
1216 Entry
->Type
== EfiRuntimeServicesData
) {
1218 Alignment
= EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT
;
1222 if ((Memory
& (Alignment
- 1)) != 0) {
1223 Status
= EFI_INVALID_PARAMETER
;
1227 NumberOfPages
+= EFI_SIZE_TO_PAGES (Alignment
) - 1;
1228 NumberOfPages
&= ~(EFI_SIZE_TO_PAGES (Alignment
) - 1);
1230 Status
= CoreConvertPages (Memory
, NumberOfPages
, EfiConventionalMemory
);
1232 if (EFI_ERROR (Status
)) {
1237 CoreReleaseMemoryLock ();
1242 This function checks to see if the last memory map descriptor in a memory map
1243 can be merged with any of the other memory map descriptors in a memorymap.
1244 Memory descriptors may be merged if they are adjacent and have the same type
1247 @param MemoryMap A pointer to the start of the memory map.
1248 @param MemoryMapDescriptor A pointer to the last descriptor in MemoryMap.
1249 @param DescriptorSize The size, in bytes, of an individual
1250 EFI_MEMORY_DESCRIPTOR.
1252 @return A pointer to the next available descriptor in MemoryMap
1255 EFI_MEMORY_DESCRIPTOR
*
1256 MergeMemoryMapDescriptor (
1257 IN EFI_MEMORY_DESCRIPTOR
*MemoryMap
,
1258 IN EFI_MEMORY_DESCRIPTOR
*MemoryMapDescriptor
,
1259 IN UINTN DescriptorSize
1263 // Traverse the array of descriptors in MemoryMap
1265 for (; MemoryMap
!= MemoryMapDescriptor
; MemoryMap
= NEXT_MEMORY_DESCRIPTOR (MemoryMap
, DescriptorSize
)) {
1267 // Check to see if the Type fields are identical.
1269 if (MemoryMap
->Type
!= MemoryMapDescriptor
->Type
) {
1274 // Check to see if the Attribute fields are identical.
1276 if (MemoryMap
->Attribute
!= MemoryMapDescriptor
->Attribute
) {
1281 // Check to see if MemoryMapDescriptor is immediately above MemoryMap
1283 if (MemoryMap
->PhysicalStart
+ EFI_PAGES_TO_SIZE ((UINTN
)MemoryMap
->NumberOfPages
) == MemoryMapDescriptor
->PhysicalStart
) {
1285 // Merge MemoryMapDescriptor into MemoryMap
1287 MemoryMap
->NumberOfPages
+= MemoryMapDescriptor
->NumberOfPages
;
1290 // Return MemoryMapDescriptor as the next available slot int he MemoryMap array
1292 return MemoryMapDescriptor
;
1296 // Check to see if MemoryMapDescriptor is immediately below MemoryMap
1298 if (MemoryMap
->PhysicalStart
- EFI_PAGES_TO_SIZE ((UINTN
)MemoryMapDescriptor
->NumberOfPages
) == MemoryMapDescriptor
->PhysicalStart
) {
1300 // Merge MemoryMapDescriptor into MemoryMap
1302 MemoryMap
->PhysicalStart
= MemoryMapDescriptor
->PhysicalStart
;
1303 MemoryMap
->VirtualStart
= MemoryMapDescriptor
->VirtualStart
;
1304 MemoryMap
->NumberOfPages
+= MemoryMapDescriptor
->NumberOfPages
;
1307 // Return MemoryMapDescriptor as the next available slot int he MemoryMap array
1309 return MemoryMapDescriptor
;
1314 // MemoryMapDescrtiptor could not be merged with any descriptors in MemoryMap.
1316 // Return the slot immediately after MemoryMapDescriptor as the next available
1317 // slot in the MemoryMap array
1319 return NEXT_MEMORY_DESCRIPTOR (MemoryMapDescriptor
, DescriptorSize
);
1323 This function returns a copy of the current memory map. The map is an array of
1324 memory descriptors, each of which describes a contiguous block of memory.
1326 @param MemoryMapSize A pointer to the size, in bytes, of the
1327 MemoryMap buffer. On input, this is the size of
1328 the buffer allocated by the caller. On output,
1329 it is the size of the buffer returned by the
1330 firmware if the buffer was large enough, or the
1331 size of the buffer needed to contain the map if
1332 the buffer was too small.
1333 @param MemoryMap A pointer to the buffer in which firmware places
1334 the current memory map.
1335 @param MapKey A pointer to the location in which firmware
1336 returns the key for the current memory map.
1337 @param DescriptorSize A pointer to the location in which firmware
1338 returns the size, in bytes, of an individual
1339 EFI_MEMORY_DESCRIPTOR.
1340 @param DescriptorVersion A pointer to the location in which firmware
1341 returns the version number associated with the
1342 EFI_MEMORY_DESCRIPTOR.
1344 @retval EFI_SUCCESS The memory map was returned in the MemoryMap
1346 @retval EFI_BUFFER_TOO_SMALL The MemoryMap buffer was too small. The current
1347 buffer size needed to hold the memory map is
1348 returned in MemoryMapSize.
1349 @retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.
1355 IN OUT UINTN
*MemoryMapSize
,
1356 IN OUT EFI_MEMORY_DESCRIPTOR
*MemoryMap
,
1358 OUT UINTN
*DescriptorSize
,
1359 OUT UINT32
*DescriptorVersion
1365 UINTN NumberOfRuntimeEntries
;
1368 EFI_GCD_MAP_ENTRY
*GcdMapEntry
;
1369 EFI_MEMORY_TYPE Type
;
1370 EFI_MEMORY_DESCRIPTOR
*MemoryMapStart
;
1373 // Make sure the parameters are valid
1375 if (MemoryMapSize
== NULL
) {
1376 return EFI_INVALID_PARAMETER
;
1379 CoreAcquireGcdMemoryLock ();
1382 // Count the number of Reserved and MMIO entries that are marked for runtime use
1384 NumberOfRuntimeEntries
= 0;
1385 for (Link
= mGcdMemorySpaceMap
.ForwardLink
; Link
!= &mGcdMemorySpaceMap
; Link
= Link
->ForwardLink
) {
1386 GcdMapEntry
= CR (Link
, EFI_GCD_MAP_ENTRY
, Link
, EFI_GCD_MAP_SIGNATURE
);
1387 if ((GcdMapEntry
->GcdMemoryType
== EfiGcdMemoryTypeReserved
) ||
1388 (GcdMapEntry
->GcdMemoryType
== EfiGcdMemoryTypeMemoryMappedIo
)) {
1389 if ((GcdMapEntry
->Attributes
& EFI_MEMORY_RUNTIME
) == EFI_MEMORY_RUNTIME
) {
1390 NumberOfRuntimeEntries
++;
1395 Size
= sizeof (EFI_MEMORY_DESCRIPTOR
);
1398 // Make sure Size != sizeof(EFI_MEMORY_DESCRIPTOR). This will
1399 // prevent people from having pointer math bugs in their code.
1400 // now you have to use *DescriptorSize to make things work.
1402 Size
+= sizeof(UINT64
) - (Size
% sizeof (UINT64
));
1404 if (DescriptorSize
!= NULL
) {
1405 *DescriptorSize
= Size
;
1408 if (DescriptorVersion
!= NULL
) {
1409 *DescriptorVersion
= EFI_MEMORY_DESCRIPTOR_VERSION
;
1412 CoreAcquireMemoryLock ();
1415 // Compute the buffer size needed to fit the entire map
1417 BufferSize
= Size
* NumberOfRuntimeEntries
;
1418 for (Link
= gMemoryMap
.ForwardLink
; Link
!= &gMemoryMap
; Link
= Link
->ForwardLink
) {
1422 if (*MemoryMapSize
< BufferSize
) {
1423 Status
= EFI_BUFFER_TOO_SMALL
;
1427 if (MemoryMap
== NULL
) {
1428 Status
= EFI_INVALID_PARAMETER
;
1435 ZeroMem (MemoryMap
, BufferSize
);
1436 MemoryMapStart
= MemoryMap
;
1437 for (Link
= gMemoryMap
.ForwardLink
; Link
!= &gMemoryMap
; Link
= Link
->ForwardLink
) {
1438 Entry
= CR (Link
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
1439 ASSERT (Entry
->VirtualStart
== 0);
1442 // Convert internal map into an EFI_MEMORY_DESCRIPTOR
1444 MemoryMap
->Type
= Entry
->Type
;
1445 MemoryMap
->PhysicalStart
= Entry
->Start
;
1446 MemoryMap
->VirtualStart
= Entry
->VirtualStart
;
1447 MemoryMap
->NumberOfPages
= RShiftU64 (Entry
->End
- Entry
->Start
+ 1, EFI_PAGE_SHIFT
);
1449 // If the memory type is EfiConventionalMemory, then determine if the range is part of a
1450 // memory type bin and needs to be converted to the same memory type as the rest of the
1451 // memory type bin in order to minimize EFI Memory Map changes across reboots. This
1452 // improves the chances for a successful S4 resume in the presence of minor page allocation
1453 // differences across reboots.
1455 if (MemoryMap
->Type
== EfiConventionalMemory
) {
1456 for (Type
= (EFI_MEMORY_TYPE
) 0; Type
< EfiMaxMemoryType
; Type
++) {
1457 if (mMemoryTypeStatistics
[Type
].Special
&&
1458 mMemoryTypeStatistics
[Type
].NumberOfPages
> 0 &&
1459 Entry
->Start
>= mMemoryTypeStatistics
[Type
].BaseAddress
&&
1460 Entry
->End
<= mMemoryTypeStatistics
[Type
].MaximumAddress
) {
1461 MemoryMap
->Type
= Type
;
1465 MemoryMap
->Attribute
= Entry
->Attribute
;
1466 if (mMemoryTypeStatistics
[MemoryMap
->Type
].Runtime
) {
1467 MemoryMap
->Attribute
|= EFI_MEMORY_RUNTIME
;
1471 // Check to see if the new Memory Map Descriptor can be merged with an
1472 // existing descriptor if they are adjacent and have the same attributes
1474 MemoryMap
= MergeMemoryMapDescriptor (MemoryMapStart
, MemoryMap
, Size
);
1477 for (Link
= mGcdMemorySpaceMap
.ForwardLink
; Link
!= &mGcdMemorySpaceMap
; Link
= Link
->ForwardLink
) {
1478 GcdMapEntry
= CR (Link
, EFI_GCD_MAP_ENTRY
, Link
, EFI_GCD_MAP_SIGNATURE
);
1479 if ((GcdMapEntry
->GcdMemoryType
== EfiGcdMemoryTypeReserved
) ||
1480 (GcdMapEntry
->GcdMemoryType
== EfiGcdMemoryTypeMemoryMappedIo
)) {
1481 if ((GcdMapEntry
->Attributes
& EFI_MEMORY_RUNTIME
) == EFI_MEMORY_RUNTIME
) {
1483 // Create EFI_MEMORY_DESCRIPTOR for every Reserved and MMIO GCD entries
1484 // that are marked for runtime use
1486 MemoryMap
->PhysicalStart
= GcdMapEntry
->BaseAddress
;
1487 MemoryMap
->VirtualStart
= 0;
1488 MemoryMap
->NumberOfPages
= RShiftU64 ((GcdMapEntry
->EndAddress
- GcdMapEntry
->BaseAddress
+ 1), EFI_PAGE_SHIFT
);
1489 MemoryMap
->Attribute
= GcdMapEntry
->Attributes
& ~EFI_MEMORY_PORT_IO
;
1491 if (GcdMapEntry
->GcdMemoryType
== EfiGcdMemoryTypeReserved
) {
1492 MemoryMap
->Type
= EfiReservedMemoryType
;
1493 } else if (GcdMapEntry
->GcdMemoryType
== EfiGcdMemoryTypeMemoryMappedIo
) {
1494 if ((GcdMapEntry
->Attributes
& EFI_MEMORY_PORT_IO
) == EFI_MEMORY_PORT_IO
) {
1495 MemoryMap
->Type
= EfiMemoryMappedIOPortSpace
;
1497 MemoryMap
->Type
= EfiMemoryMappedIO
;
1502 // Check to see if the new Memory Map Descriptor can be merged with an
1503 // existing descriptor if they are adjacent and have the same attributes
1505 MemoryMap
= MergeMemoryMapDescriptor (MemoryMapStart
, MemoryMap
, Size
);
1511 // Compute the size of the buffer actually used after all memory map descriptor merge operations
1513 BufferSize
= ((UINT8
*)MemoryMap
- (UINT8
*)MemoryMapStart
);
1515 Status
= EFI_SUCCESS
;
1519 CoreReleaseMemoryLock ();
1521 CoreReleaseGcdMemoryLock ();
1524 // Update the map key finally
1526 if (MapKey
!= NULL
) {
1527 *MapKey
= mMemoryMapKey
;
1530 *MemoryMapSize
= BufferSize
;
1537 Internal function. Used by the pool functions to allocate pages
1538 to back pool allocation requests.
1540 @param PoolType The type of memory for the new pool pages
1541 @param NumberOfPages No of pages to allocate
1542 @param Alignment Bits to align.
1544 @return The allocated memory, or NULL
1548 CoreAllocatePoolPages (
1549 IN EFI_MEMORY_TYPE PoolType
,
1550 IN UINTN NumberOfPages
,
1557 // Find the pages to convert
1559 Start
= FindFreePages (MAX_ADDRESS
, NumberOfPages
, PoolType
, Alignment
);
1562 // Convert it to boot services data
1565 DEBUG ((DEBUG_ERROR
| DEBUG_PAGE
, "AllocatePoolPages: failed to allocate %d pages\n", (UINT32
)NumberOfPages
));
1567 CoreConvertPages (Start
, NumberOfPages
, PoolType
);
1570 return (VOID
*)(UINTN
) Start
;
1575 Internal function. Frees pool pages allocated via AllocatePoolPages ()
1577 @param Memory The base address to free
1578 @param NumberOfPages The number of pages to free
1583 IN EFI_PHYSICAL_ADDRESS Memory
,
1584 IN UINTN NumberOfPages
1587 CoreConvertPages (Memory
, NumberOfPages
, EfiConventionalMemory
);
1593 Make sure the memory map is following all the construction rules,
1594 it is the last time to check memory map error before exit boot services.
1596 @param MapKey Memory map key
1598 @retval EFI_INVALID_PARAMETER Memory map not consistent with construction
1600 @retval EFI_SUCCESS Valid memory map.
1604 CoreTerminateMemoryMap (
1612 Status
= EFI_SUCCESS
;
1614 CoreAcquireMemoryLock ();
1616 if (MapKey
== mMemoryMapKey
) {
1619 // Make sure the memory map is following all the construction rules
1620 // This is the last chance we will be able to display any messages on
1621 // the console devices.
1624 for (Link
= gMemoryMap
.ForwardLink
; Link
!= &gMemoryMap
; Link
= Link
->ForwardLink
) {
1625 Entry
= CR(Link
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
1626 if ((Entry
->Attribute
& EFI_MEMORY_RUNTIME
) != 0) {
1627 if (Entry
->Type
== EfiACPIReclaimMemory
|| Entry
->Type
== EfiACPIMemoryNVS
) {
1628 DEBUG((DEBUG_ERROR
| DEBUG_PAGE
, "ExitBootServices: ACPI memory entry has RUNTIME attribute set.\n"));
1629 Status
= EFI_INVALID_PARAMETER
;
1632 if ((Entry
->Start
& (EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT
- 1)) != 0) {
1633 DEBUG((DEBUG_ERROR
| DEBUG_PAGE
, "ExitBootServices: A RUNTIME memory entry is not on a proper alignment.\n"));
1634 Status
= EFI_INVALID_PARAMETER
;
1637 if (((Entry
->End
+ 1) & (EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT
- 1)) != 0) {
1638 DEBUG((DEBUG_ERROR
| DEBUG_PAGE
, "ExitBootServices: A RUNTIME memory entry is not on a proper alignment.\n"));
1639 Status
= EFI_INVALID_PARAMETER
;
1646 // The map key they gave us matches what we expect. Fall through and
1647 // return success. In an ideal world we would clear out all of
1648 // EfiBootServicesCode and EfiBootServicesData. However this function
1649 // is not the last one called by ExitBootServices(), so we have to
1650 // preserve the memory contents.
1653 Status
= EFI_INVALID_PARAMETER
;
1657 CoreReleaseMemoryLock ();