2 UEFI Memory page management functions.
4 Copyright (c) 2007 - 2014, 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_STATISTICS
;
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_STATISTICS 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 // If memory of type EfiConventionalMemory is being added that includes the page
183 // starting at address 0, then zero the page starting at address 0. This has
184 // two benifits. It helps find NULL pointer bugs and it also maximizes
185 // compatibility with operating systems that may evaluate memory in this page
186 // for legacy data structures. If memory of any other type is added starting
187 // at address 0, then do not zero the page at address 0 because the page is being
188 // used for other purposes.
190 if (Type
== EfiConventionalMemory
&& Start
== 0 && (End
>= EFI_PAGE_SIZE
- 1)) {
191 SetMem ((VOID
*)(UINTN
)Start
, EFI_PAGE_SIZE
, 0);
195 // Memory map being altered so updated key
200 // UEFI 2.0 added an event group for notificaiton on memory map changes.
201 // So we need to signal this Event Group every time the memory map changes.
202 // If we are in EFI 1.10 compatability mode no event groups will be
203 // found and nothing will happen we we call this function. These events
204 // will get signaled but since a lock is held around the call to this
205 // function the notificaiton events will only be called after this funciton
206 // returns and the lock is released.
208 CoreNotifySignalList (&gEfiEventMemoryMapChangeGuid
);
211 // Look for adjoining memory descriptor
214 // Two memory descriptors can only be merged if they have the same Type
215 // and the same Attribute
218 Link
= gMemoryMap
.ForwardLink
;
219 while (Link
!= &gMemoryMap
) {
220 Entry
= CR (Link
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
221 Link
= Link
->ForwardLink
;
223 if (Entry
->Type
!= Type
) {
227 if (Entry
->Attribute
!= Attribute
) {
231 if (Entry
->End
+ 1 == Start
) {
233 Start
= Entry
->Start
;
234 RemoveMemoryMapEntry (Entry
);
236 } else if (Entry
->Start
== End
+ 1) {
239 RemoveMemoryMapEntry (Entry
);
247 mMapStack
[mMapDepth
].Signature
= MEMORY_MAP_SIGNATURE
;
248 mMapStack
[mMapDepth
].FromPages
= FALSE
;
249 mMapStack
[mMapDepth
].Type
= Type
;
250 mMapStack
[mMapDepth
].Start
= Start
;
251 mMapStack
[mMapDepth
].End
= End
;
252 mMapStack
[mMapDepth
].VirtualStart
= 0;
253 mMapStack
[mMapDepth
].Attribute
= Attribute
;
254 InsertTailList (&gMemoryMap
, &mMapStack
[mMapDepth
].Link
);
257 ASSERT (mMapDepth
< MAX_MAP_DEPTH
);
263 Internal function. Deque a descriptor entry from the mFreeMemoryMapEntryList.
264 If the list is emtry, then allocate a new page to refuel the list.
265 Please Note this algorithm to allocate the memory map descriptor has a property
266 that the memory allocated for memory entries always grows, and will never really be freed
267 For example, if the current boot uses 2000 memory map entries at the maximum point, but
268 ends up with only 50 at the time the OS is booted, then the memory associated with the 1950
269 memory map entries is still allocated from EfiBootServicesMemory.
272 @return The Memory map descriptor dequed from the mFreeMemoryMapEntryList
276 AllocateMemoryMapEntry (
280 MEMORY_MAP
* FreeDescriptorEntries
;
284 if (IsListEmpty (&mFreeMemoryMapEntryList
)) {
286 // The list is empty, to allocate one page to refuel the list
288 FreeDescriptorEntries
= CoreAllocatePoolPages (EfiBootServicesData
, EFI_SIZE_TO_PAGES(DEFAULT_PAGE_ALLOCATION
), DEFAULT_PAGE_ALLOCATION
);
289 if(FreeDescriptorEntries
!= NULL
) {
291 // Enque the free memmory map entries into the list
293 for (Index
= 0; Index
< DEFAULT_PAGE_ALLOCATION
/ sizeof(MEMORY_MAP
); Index
++) {
294 FreeDescriptorEntries
[Index
].Signature
= MEMORY_MAP_SIGNATURE
;
295 InsertTailList (&mFreeMemoryMapEntryList
, &FreeDescriptorEntries
[Index
].Link
);
302 // dequeue the first descriptor from the list
304 Entry
= CR (mFreeMemoryMapEntryList
.ForwardLink
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
305 RemoveEntryList (&Entry
->Link
);
312 Internal function. Moves any memory descriptors that are on the
313 temporary descriptor stack to heap.
317 CoreFreeMemoryMapStack (
325 ASSERT_LOCKED (&gMemoryLock
);
328 // If already freeing the map stack, then return
330 if (mFreeMapStack
!= 0) {
335 // Move the temporary memory descriptor stack into pool
339 while (mMapDepth
!= 0) {
341 // Deque an memory map entry from mFreeMemoryMapEntryList
343 Entry
= AllocateMemoryMapEntry ();
348 // Update to proper entry
352 if (mMapStack
[mMapDepth
].Link
.ForwardLink
!= NULL
) {
355 // Move this entry to general memory
357 RemoveEntryList (&mMapStack
[mMapDepth
].Link
);
358 mMapStack
[mMapDepth
].Link
.ForwardLink
= NULL
;
360 CopyMem (Entry
, &mMapStack
[mMapDepth
], sizeof (MEMORY_MAP
));
361 Entry
->FromPages
= TRUE
;
364 // Find insertion location
366 for (Link2
= gMemoryMap
.ForwardLink
; Link2
!= &gMemoryMap
; Link2
= Link2
->ForwardLink
) {
367 Entry2
= CR (Link2
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
368 if (Entry2
->FromPages
&& Entry2
->Start
> Entry
->Start
) {
373 InsertTailList (Link2
, &Entry
->Link
);
377 // This item of mMapStack[mMapDepth] has already been dequeued from gMemoryMap list,
378 // so here no need to move it to memory.
380 InsertTailList (&mFreeMemoryMapEntryList
, &Entry
->Link
);
388 Find untested but initialized memory regions in GCD map and convert them to be DXE allocatable.
392 PromoteMemoryResource (
397 EFI_GCD_MAP_ENTRY
*Entry
;
400 DEBUG ((DEBUG_PAGE
, "Promote the memory resource\n"));
402 CoreAcquireGcdMemoryLock ();
405 Link
= mGcdMemorySpaceMap
.ForwardLink
;
406 while (Link
!= &mGcdMemorySpaceMap
) {
408 Entry
= CR (Link
, EFI_GCD_MAP_ENTRY
, Link
, EFI_GCD_MAP_SIGNATURE
);
410 if (Entry
->GcdMemoryType
== EfiGcdMemoryTypeReserved
&&
411 Entry
->EndAddress
< MAX_ADDRESS
&&
412 (Entry
->Capabilities
& (EFI_MEMORY_PRESENT
| EFI_MEMORY_INITIALIZED
| EFI_MEMORY_TESTED
)) ==
413 (EFI_MEMORY_PRESENT
| EFI_MEMORY_INITIALIZED
)) {
415 // Update the GCD map
417 Entry
->GcdMemoryType
= EfiGcdMemoryTypeSystemMemory
;
418 Entry
->Capabilities
|= EFI_MEMORY_TESTED
;
419 Entry
->ImageHandle
= gDxeCoreImageHandle
;
420 Entry
->DeviceHandle
= NULL
;
423 // Add to allocable system memory resource
427 EfiConventionalMemory
,
430 Entry
->Capabilities
& ~(EFI_MEMORY_PRESENT
| EFI_MEMORY_INITIALIZED
| EFI_MEMORY_TESTED
| EFI_MEMORY_RUNTIME
)
432 CoreFreeMemoryMapStack ();
437 Link
= Link
->ForwardLink
;
440 CoreReleaseGcdMemoryLock ();
445 This function try to allocate Runtime code & Boot time code memory range. If LMFA enabled, 2 patchable PCD
446 PcdLoadFixAddressRuntimeCodePageNumber & PcdLoadFixAddressBootTimeCodePageNumber which are set by tools will record the
447 size of boot time and runtime code.
451 CoreLoadingFixedAddressHook (
455 UINT32 RuntimeCodePageNumber
;
456 UINT32 BootTimeCodePageNumber
;
457 EFI_PHYSICAL_ADDRESS RuntimeCodeBase
;
458 EFI_PHYSICAL_ADDRESS BootTimeCodeBase
;
462 // Make sure these 2 areas are not initialzied.
464 if (!gLoadFixedAddressCodeMemoryReady
) {
465 RuntimeCodePageNumber
= PcdGet32(PcdLoadFixAddressRuntimeCodePageNumber
);
466 BootTimeCodePageNumber
= PcdGet32(PcdLoadFixAddressBootTimeCodePageNumber
);
467 RuntimeCodeBase
= (EFI_PHYSICAL_ADDRESS
)(gLoadModuleAtFixAddressConfigurationTable
.DxeCodeTopAddress
- EFI_PAGES_TO_SIZE (RuntimeCodePageNumber
));
468 BootTimeCodeBase
= (EFI_PHYSICAL_ADDRESS
)(RuntimeCodeBase
- EFI_PAGES_TO_SIZE (BootTimeCodePageNumber
));
470 // Try to allocate runtime memory.
472 Status
= CoreAllocatePages (
474 EfiRuntimeServicesCode
,
475 RuntimeCodePageNumber
,
478 if (EFI_ERROR(Status
)) {
480 // Runtime memory allocation failed
485 // Try to allocate boot memory.
487 Status
= CoreAllocatePages (
490 BootTimeCodePageNumber
,
493 if (EFI_ERROR(Status
)) {
495 // boot memory allocation failed. Free Runtime code range and will try the allocation again when
496 // new memory range is installed.
500 RuntimeCodePageNumber
504 gLoadFixedAddressCodeMemoryReady
= TRUE
;
510 Called to initialize the memory map and add descriptors to
511 the current descriptor list.
512 The first descriptor that is added must be general usable
513 memory as the addition allocates heap.
515 @param Type The type of memory to add
516 @param Start The starting address in the memory range Must be
518 @param NumberOfPages The number of pages in the range
519 @param Attribute Attributes of the memory to add
521 @return None. The range is added to the memory map
525 CoreAddMemoryDescriptor (
526 IN EFI_MEMORY_TYPE Type
,
527 IN EFI_PHYSICAL_ADDRESS Start
,
528 IN UINT64 NumberOfPages
,
532 EFI_PHYSICAL_ADDRESS End
;
537 if ((Start
& EFI_PAGE_MASK
) != 0) {
541 if (Type
>= EfiMaxMemoryType
&& Type
<= 0x7fffffff) {
544 CoreAcquireMemoryLock ();
545 End
= Start
+ LShiftU64 (NumberOfPages
, EFI_PAGE_SHIFT
) - 1;
546 CoreAddRange (Type
, Start
, End
, Attribute
);
547 CoreFreeMemoryMapStack ();
548 CoreReleaseMemoryLock ();
551 // If Loading Module At Fixed Address feature is enabled. try to allocate memory with Runtime code & Boot time code type
553 if (PcdGet64(PcdLoadModuleAtFixAddressEnable
) != 0) {
554 CoreLoadingFixedAddressHook();
558 // Check to see if the statistics for the different memory types have already been established
560 if (mMemoryTypeInformationInitialized
) {
566 // Loop through each memory type in the order specified by the gMemoryTypeInformation[] array
568 for (Index
= 0; gMemoryTypeInformation
[Index
].Type
!= EfiMaxMemoryType
; Index
++) {
570 // Make sure the memory type in the gMemoryTypeInformation[] array is valid
572 Type
= (EFI_MEMORY_TYPE
) (gMemoryTypeInformation
[Index
].Type
);
573 if ((UINT32
)Type
> EfiMaxMemoryType
) {
576 if (gMemoryTypeInformation
[Index
].NumberOfPages
!= 0) {
578 // Allocate pages for the current memory type from the top of available memory
580 Status
= CoreAllocatePages (
583 gMemoryTypeInformation
[Index
].NumberOfPages
,
584 &mMemoryTypeStatistics
[Type
].BaseAddress
586 if (EFI_ERROR (Status
)) {
588 // If an error occurs allocating the pages for the current memory type, then
589 // free all the pages allocates for the previous memory types and return. This
590 // operation with be retied when/if more memory is added to the system
592 for (FreeIndex
= 0; FreeIndex
< Index
; FreeIndex
++) {
594 // Make sure the memory type in the gMemoryTypeInformation[] array is valid
596 Type
= (EFI_MEMORY_TYPE
) (gMemoryTypeInformation
[FreeIndex
].Type
);
597 if ((UINT32
)Type
> EfiMaxMemoryType
) {
601 if (gMemoryTypeInformation
[FreeIndex
].NumberOfPages
!= 0) {
603 mMemoryTypeStatistics
[Type
].BaseAddress
,
604 gMemoryTypeInformation
[FreeIndex
].NumberOfPages
606 mMemoryTypeStatistics
[Type
].BaseAddress
= 0;
607 mMemoryTypeStatistics
[Type
].MaximumAddress
= MAX_ADDRESS
;
614 // Compute the address at the top of the current statistics
616 mMemoryTypeStatistics
[Type
].MaximumAddress
=
617 mMemoryTypeStatistics
[Type
].BaseAddress
+
618 LShiftU64 (gMemoryTypeInformation
[Index
].NumberOfPages
, EFI_PAGE_SHIFT
) - 1;
621 // If the current base address is the lowest address so far, then update the default
624 if (mMemoryTypeStatistics
[Type
].BaseAddress
< mDefaultMaximumAddress
) {
625 mDefaultMaximumAddress
= mMemoryTypeStatistics
[Type
].BaseAddress
- 1;
631 // There was enough system memory for all the the memory types were allocated. So,
632 // those memory areas can be freed for future allocations, and all future memory
633 // allocations can occur within their respective bins
635 for (Index
= 0; gMemoryTypeInformation
[Index
].Type
!= EfiMaxMemoryType
; Index
++) {
637 // Make sure the memory type in the gMemoryTypeInformation[] array is valid
639 Type
= (EFI_MEMORY_TYPE
) (gMemoryTypeInformation
[Index
].Type
);
640 if ((UINT32
)Type
> EfiMaxMemoryType
) {
643 if (gMemoryTypeInformation
[Index
].NumberOfPages
!= 0) {
645 mMemoryTypeStatistics
[Type
].BaseAddress
,
646 gMemoryTypeInformation
[Index
].NumberOfPages
648 mMemoryTypeStatistics
[Type
].NumberOfPages
= gMemoryTypeInformation
[Index
].NumberOfPages
;
649 gMemoryTypeInformation
[Index
].NumberOfPages
= 0;
654 // If the number of pages reserved for a memory type is 0, then all allocations for that type
655 // should be in the default range.
657 for (Type
= (EFI_MEMORY_TYPE
) 0; Type
< EfiMaxMemoryType
; Type
++) {
658 for (Index
= 0; gMemoryTypeInformation
[Index
].Type
!= EfiMaxMemoryType
; Index
++) {
659 if (Type
== (EFI_MEMORY_TYPE
)gMemoryTypeInformation
[Index
].Type
) {
660 mMemoryTypeStatistics
[Type
].InformationIndex
= Index
;
663 mMemoryTypeStatistics
[Type
].CurrentNumberOfPages
= 0;
664 if (mMemoryTypeStatistics
[Type
].MaximumAddress
== MAX_ADDRESS
) {
665 mMemoryTypeStatistics
[Type
].MaximumAddress
= mDefaultMaximumAddress
;
669 mMemoryTypeInformationInitialized
= TRUE
;
674 Internal function. Converts a memory range to the specified type.
675 The range must exist in the memory map.
677 @param Start The first address of the range Must be page
679 @param NumberOfPages The number of pages to convert
680 @param NewType The new type for the memory range
682 @retval EFI_INVALID_PARAMETER Invalid parameter
683 @retval EFI_NOT_FOUND Could not find a descriptor cover the specified
684 range or convertion not allowed.
685 @retval EFI_SUCCESS Successfully converts the memory range to the
692 IN UINT64 NumberOfPages
,
693 IN EFI_MEMORY_TYPE NewType
697 UINT64 NumberOfBytes
;
705 NumberOfBytes
= LShiftU64 (NumberOfPages
, EFI_PAGE_SHIFT
);
706 End
= Start
+ NumberOfBytes
- 1;
708 ASSERT (NumberOfPages
);
709 ASSERT ((Start
& EFI_PAGE_MASK
) == 0);
710 ASSERT (End
> Start
) ;
711 ASSERT_LOCKED (&gMemoryLock
);
713 if (NumberOfPages
== 0 || ((Start
& EFI_PAGE_MASK
) != 0) || (Start
> (Start
+ NumberOfBytes
))) {
714 return EFI_INVALID_PARAMETER
;
718 // Convert the entire range
721 while (Start
< End
) {
724 // Find the entry that the covers the range
726 for (Link
= gMemoryMap
.ForwardLink
; Link
!= &gMemoryMap
; Link
= Link
->ForwardLink
) {
727 Entry
= CR (Link
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
729 if (Entry
->Start
<= Start
&& Entry
->End
> Start
) {
734 if (Link
== &gMemoryMap
) {
735 DEBUG ((DEBUG_ERROR
| DEBUG_PAGE
, "ConvertPages: failed to find range %lx - %lx\n", Start
, End
));
736 return EFI_NOT_FOUND
;
740 // Convert range to the end, or to the end of the descriptor
741 // if that's all we've got
745 ASSERT (Entry
!= NULL
);
746 if (Entry
->End
< End
) {
747 RangeEnd
= Entry
->End
;
750 DEBUG ((DEBUG_PAGE
, "ConvertRange: %lx-%lx to %d\n", Start
, RangeEnd
, NewType
));
753 // Debug code - verify conversion is allowed
755 if (!(NewType
== EfiConventionalMemory
? 1 : 0) ^ (Entry
->Type
== EfiConventionalMemory
? 1 : 0)) {
756 DEBUG ((DEBUG_ERROR
| DEBUG_PAGE
, "ConvertPages: Incompatible memory types\n"));
757 return EFI_NOT_FOUND
;
761 // Update counters for the number of pages allocated to each memory type
763 if ((UINT32
)Entry
->Type
< EfiMaxMemoryType
) {
764 if ((Start
>= mMemoryTypeStatistics
[Entry
->Type
].BaseAddress
&& Start
<= mMemoryTypeStatistics
[Entry
->Type
].MaximumAddress
) ||
765 (Start
>= mDefaultBaseAddress
&& Start
<= mDefaultMaximumAddress
) ) {
766 if (NumberOfPages
> mMemoryTypeStatistics
[Entry
->Type
].CurrentNumberOfPages
) {
767 mMemoryTypeStatistics
[Entry
->Type
].CurrentNumberOfPages
= 0;
769 mMemoryTypeStatistics
[Entry
->Type
].CurrentNumberOfPages
-= NumberOfPages
;
774 if ((UINT32
)NewType
< EfiMaxMemoryType
) {
775 if ((Start
>= mMemoryTypeStatistics
[NewType
].BaseAddress
&& Start
<= mMemoryTypeStatistics
[NewType
].MaximumAddress
) ||
776 (Start
>= mDefaultBaseAddress
&& Start
<= mDefaultMaximumAddress
) ) {
777 mMemoryTypeStatistics
[NewType
].CurrentNumberOfPages
+= NumberOfPages
;
778 if (mMemoryTypeStatistics
[NewType
].CurrentNumberOfPages
> gMemoryTypeInformation
[mMemoryTypeStatistics
[NewType
].InformationIndex
].NumberOfPages
) {
779 gMemoryTypeInformation
[mMemoryTypeStatistics
[NewType
].InformationIndex
].NumberOfPages
= (UINT32
)mMemoryTypeStatistics
[NewType
].CurrentNumberOfPages
;
785 // Pull range out of descriptor
787 if (Entry
->Start
== Start
) {
792 Entry
->Start
= RangeEnd
+ 1;
794 } else if (Entry
->End
== RangeEnd
) {
799 Entry
->End
= Start
- 1;
804 // Pull it out of the center, clip current
810 mMapStack
[mMapDepth
].Signature
= MEMORY_MAP_SIGNATURE
;
811 mMapStack
[mMapDepth
].FromPages
= FALSE
;
812 mMapStack
[mMapDepth
].Type
= Entry
->Type
;
813 mMapStack
[mMapDepth
].Start
= RangeEnd
+1;
814 mMapStack
[mMapDepth
].End
= Entry
->End
;
817 // Inherit Attribute from the Memory Descriptor that is being clipped
819 mMapStack
[mMapDepth
].Attribute
= Entry
->Attribute
;
821 Entry
->End
= Start
- 1;
822 ASSERT (Entry
->Start
< Entry
->End
);
824 Entry
= &mMapStack
[mMapDepth
];
825 InsertTailList (&gMemoryMap
, &Entry
->Link
);
828 ASSERT (mMapDepth
< MAX_MAP_DEPTH
);
832 // The new range inherits the same Attribute as the Entry
833 //it is being cut out of
835 Attribute
= Entry
->Attribute
;
838 // If the descriptor is empty, then remove it from the map
840 if (Entry
->Start
== Entry
->End
+ 1) {
841 RemoveMemoryMapEntry (Entry
);
846 // Add our new range in
848 CoreAddRange (NewType
, Start
, RangeEnd
, Attribute
);
849 if (NewType
== EfiConventionalMemory
) {
851 // Avoid calling DEBUG_CLEAR_MEMORY() for an address of 0 because this
852 // macro will ASSERT() if address is 0. Instead, CoreAddRange() guarantees
853 // that the page starting at address 0 is always filled with zeros.
856 if (RangeEnd
> EFI_PAGE_SIZE
) {
857 DEBUG_CLEAR_MEMORY ((VOID
*)(UINTN
) EFI_PAGE_SIZE
, (UINTN
) (RangeEnd
- EFI_PAGE_SIZE
+ 1));
860 DEBUG_CLEAR_MEMORY ((VOID
*)(UINTN
) Start
, (UINTN
) (RangeEnd
- Start
+ 1));
865 // Move any map descriptor stack to general pool
867 CoreFreeMemoryMapStack ();
870 // Bump the starting address, and convert the next range
872 Start
= RangeEnd
+ 1;
876 // Converted the whole range, done
885 Internal function. Finds a consecutive free page range below
886 the requested address.
888 @param MaxAddress The address that the range must be below
889 @param MinAddress The address that the range must be above
890 @param NumberOfPages Number of pages needed
891 @param NewType The type of memory the range is going to be
893 @param Alignment Bits to align with
895 @return The base address of the range, or 0 if the range was not found
900 IN UINT64 MaxAddress
,
901 IN UINT64 MinAddress
,
902 IN UINT64 NumberOfPages
,
903 IN EFI_MEMORY_TYPE NewType
,
907 UINT64 NumberOfBytes
;
911 UINT64 DescNumberOfBytes
;
915 if ((MaxAddress
< EFI_PAGE_MASK
) ||(NumberOfPages
== 0)) {
919 if ((MaxAddress
& EFI_PAGE_MASK
) != EFI_PAGE_MASK
) {
922 // If MaxAddress is not aligned to the end of a page
926 // Change MaxAddress to be 1 page lower
928 MaxAddress
-= (EFI_PAGE_MASK
+ 1);
931 // Set MaxAddress to a page boundary
933 MaxAddress
&= ~(UINT64
)EFI_PAGE_MASK
;
936 // Set MaxAddress to end of the page
938 MaxAddress
|= EFI_PAGE_MASK
;
941 NumberOfBytes
= LShiftU64 (NumberOfPages
, EFI_PAGE_SHIFT
);
944 for (Link
= gMemoryMap
.ForwardLink
; Link
!= &gMemoryMap
; Link
= Link
->ForwardLink
) {
945 Entry
= CR (Link
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
948 // If it's not a free entry, don't bother with it
950 if (Entry
->Type
!= EfiConventionalMemory
) {
954 DescStart
= Entry
->Start
;
955 DescEnd
= Entry
->End
;
958 // If desc is past max allowed address or below min allowed address, skip it
960 if ((DescStart
>= MaxAddress
) || (DescEnd
< MinAddress
)) {
965 // If desc ends past max allowed address, clip the end
967 if (DescEnd
>= MaxAddress
) {
968 DescEnd
= MaxAddress
;
971 DescEnd
= ((DescEnd
+ 1) & (~(Alignment
- 1))) - 1;
974 // Compute the number of bytes we can used from this
975 // descriptor, and see it's enough to satisfy the request
977 DescNumberOfBytes
= DescEnd
- DescStart
+ 1;
979 if (DescNumberOfBytes
>= NumberOfBytes
) {
981 // If the start of the allocated range is below the min address allowed, skip it
983 if ((DescEnd
- NumberOfBytes
+ 1) < MinAddress
) {
988 // If this is the best match so far remember it
990 if (DescEnd
> Target
) {
997 // If this is a grow down, adjust target to be the allocation base
999 Target
-= NumberOfBytes
- 1;
1002 // If we didn't find a match, return 0
1004 if ((Target
& EFI_PAGE_MASK
) != 0) {
1013 Internal function. Finds a consecutive free page range below
1014 the requested address
1016 @param MaxAddress The address that the range must be below
1017 @param NoPages Number of pages needed
1018 @param NewType The type of memory the range is going to be
1020 @param Alignment Bits to align with
1022 @return The base address of the range, or 0 if the range was not found.
1027 IN UINT64 MaxAddress
,
1029 IN EFI_MEMORY_TYPE NewType
,
1036 // Attempt to find free pages in the preferred bin based on the requested memory type
1038 if ((UINT32
)NewType
< EfiMaxMemoryType
&& MaxAddress
>= mMemoryTypeStatistics
[NewType
].MaximumAddress
) {
1039 Start
= CoreFindFreePagesI (
1040 mMemoryTypeStatistics
[NewType
].MaximumAddress
,
1041 mMemoryTypeStatistics
[NewType
].BaseAddress
,
1052 // Attempt to find free pages in the default allocation bin
1054 if (MaxAddress
>= mDefaultMaximumAddress
) {
1055 Start
= CoreFindFreePagesI (mDefaultMaximumAddress
, 0, NoPages
, NewType
, Alignment
);
1057 if (Start
< mDefaultBaseAddress
) {
1058 mDefaultBaseAddress
= Start
;
1065 // The allocation did not succeed in any of the prefered bins even after
1066 // promoting resources. Attempt to find free pages anywhere is the requested
1067 // address range. If this allocation fails, then there are not enough
1068 // resources anywhere to satisfy the request.
1070 Start
= CoreFindFreePagesI (MaxAddress
, 0, NoPages
, NewType
, Alignment
);
1076 // If allocations from the preferred bins fail, then attempt to promote memory resources.
1078 if (!PromoteMemoryResource ()) {
1083 // If any memory resources were promoted, then re-attempt the allocation
1085 return FindFreePages (MaxAddress
, NoPages
, NewType
, Alignment
);
1090 Allocates pages from the memory map.
1092 @param Type The type of allocation to perform
1093 @param MemoryType The type of memory to turn the allocated pages
1095 @param NumberOfPages The number of pages to allocate
1096 @param Memory A pointer to receive the base allocated memory
1099 @return Status. On success, Memory is filled in with the base address allocated
1100 @retval EFI_INVALID_PARAMETER Parameters violate checking rules defined in
1102 @retval EFI_NOT_FOUND Could not allocate pages match the requirement.
1103 @retval EFI_OUT_OF_RESOURCES No enough pages to allocate.
1104 @retval EFI_SUCCESS Pages successfully allocated.
1110 IN EFI_ALLOCATE_TYPE Type
,
1111 IN EFI_MEMORY_TYPE MemoryType
,
1112 IN UINTN NumberOfPages
,
1113 IN OUT EFI_PHYSICAL_ADDRESS
*Memory
1121 if ((UINT32
)Type
>= MaxAllocateType
) {
1122 return EFI_INVALID_PARAMETER
;
1125 if ((MemoryType
>= EfiMaxMemoryType
&& MemoryType
<= 0x7fffffff) ||
1126 MemoryType
== EfiConventionalMemory
) {
1127 return EFI_INVALID_PARAMETER
;
1130 if (Memory
== NULL
) {
1131 return EFI_INVALID_PARAMETER
;
1134 Alignment
= EFI_DEFAULT_PAGE_ALLOCATION_ALIGNMENT
;
1136 if (MemoryType
== EfiACPIReclaimMemory
||
1137 MemoryType
== EfiACPIMemoryNVS
||
1138 MemoryType
== EfiRuntimeServicesCode
||
1139 MemoryType
== EfiRuntimeServicesData
) {
1141 Alignment
= EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT
;
1144 if (Type
== AllocateAddress
) {
1145 if ((*Memory
& (Alignment
- 1)) != 0) {
1146 return EFI_NOT_FOUND
;
1150 NumberOfPages
+= EFI_SIZE_TO_PAGES (Alignment
) - 1;
1151 NumberOfPages
&= ~(EFI_SIZE_TO_PAGES (Alignment
) - 1);
1154 // If this is for below a particular address, then
1159 // The max address is the max natively addressable address for the processor
1161 MaxAddress
= MAX_ADDRESS
;
1163 if (Type
== AllocateMaxAddress
) {
1167 CoreAcquireMemoryLock ();
1170 // If not a specific address, then find an address to allocate
1172 if (Type
!= AllocateAddress
) {
1173 Start
= FindFreePages (MaxAddress
, NumberOfPages
, MemoryType
, Alignment
);
1175 Status
= EFI_OUT_OF_RESOURCES
;
1181 // Convert pages from FreeMemory to the requested type
1183 Status
= CoreConvertPages (Start
, NumberOfPages
, MemoryType
);
1186 CoreReleaseMemoryLock ();
1188 if (!EFI_ERROR (Status
)) {
1197 Frees previous allocated pages.
1199 @param Memory Base address of memory being freed
1200 @param NumberOfPages The number of pages to free
1202 @retval EFI_NOT_FOUND Could not find the entry that covers the range
1203 @retval EFI_INVALID_PARAMETER Address not aligned
1204 @return EFI_SUCCESS -Pages successfully freed.
1210 IN EFI_PHYSICAL_ADDRESS Memory
,
1211 IN UINTN NumberOfPages
1222 CoreAcquireMemoryLock ();
1225 // Find the entry that the covers the range
1228 for (Link
= gMemoryMap
.ForwardLink
; Link
!= &gMemoryMap
; Link
= Link
->ForwardLink
) {
1229 Entry
= CR(Link
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
1230 if (Entry
->Start
<= Memory
&& Entry
->End
> Memory
) {
1234 if (Link
== &gMemoryMap
) {
1235 Status
= EFI_NOT_FOUND
;
1239 Alignment
= EFI_DEFAULT_PAGE_ALLOCATION_ALIGNMENT
;
1241 ASSERT (Entry
!= NULL
);
1242 if (Entry
->Type
== EfiACPIReclaimMemory
||
1243 Entry
->Type
== EfiACPIMemoryNVS
||
1244 Entry
->Type
== EfiRuntimeServicesCode
||
1245 Entry
->Type
== EfiRuntimeServicesData
) {
1247 Alignment
= EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT
;
1251 if ((Memory
& (Alignment
- 1)) != 0) {
1252 Status
= EFI_INVALID_PARAMETER
;
1256 NumberOfPages
+= EFI_SIZE_TO_PAGES (Alignment
) - 1;
1257 NumberOfPages
&= ~(EFI_SIZE_TO_PAGES (Alignment
) - 1);
1259 Status
= CoreConvertPages (Memory
, NumberOfPages
, EfiConventionalMemory
);
1261 if (EFI_ERROR (Status
)) {
1266 CoreReleaseMemoryLock ();
1271 This function checks to see if the last memory map descriptor in a memory map
1272 can be merged with any of the other memory map descriptors in a memorymap.
1273 Memory descriptors may be merged if they are adjacent and have the same type
1276 @param MemoryMap A pointer to the start of the memory map.
1277 @param MemoryMapDescriptor A pointer to the last descriptor in MemoryMap.
1278 @param DescriptorSize The size, in bytes, of an individual
1279 EFI_MEMORY_DESCRIPTOR.
1281 @return A pointer to the next available descriptor in MemoryMap
1284 EFI_MEMORY_DESCRIPTOR
*
1285 MergeMemoryMapDescriptor (
1286 IN EFI_MEMORY_DESCRIPTOR
*MemoryMap
,
1287 IN EFI_MEMORY_DESCRIPTOR
*MemoryMapDescriptor
,
1288 IN UINTN DescriptorSize
1292 // Traverse the array of descriptors in MemoryMap
1294 for (; MemoryMap
!= MemoryMapDescriptor
; MemoryMap
= NEXT_MEMORY_DESCRIPTOR (MemoryMap
, DescriptorSize
)) {
1296 // Check to see if the Type fields are identical.
1298 if (MemoryMap
->Type
!= MemoryMapDescriptor
->Type
) {
1303 // Check to see if the Attribute fields are identical.
1305 if (MemoryMap
->Attribute
!= MemoryMapDescriptor
->Attribute
) {
1310 // Check to see if MemoryMapDescriptor is immediately above MemoryMap
1312 if (MemoryMap
->PhysicalStart
+ EFI_PAGES_TO_SIZE ((UINTN
)MemoryMap
->NumberOfPages
) == MemoryMapDescriptor
->PhysicalStart
) {
1314 // Merge MemoryMapDescriptor into MemoryMap
1316 MemoryMap
->NumberOfPages
+= MemoryMapDescriptor
->NumberOfPages
;
1319 // Return MemoryMapDescriptor as the next available slot int he MemoryMap array
1321 return MemoryMapDescriptor
;
1325 // Check to see if MemoryMapDescriptor is immediately below MemoryMap
1327 if (MemoryMap
->PhysicalStart
- EFI_PAGES_TO_SIZE ((UINTN
)MemoryMapDescriptor
->NumberOfPages
) == MemoryMapDescriptor
->PhysicalStart
) {
1329 // Merge MemoryMapDescriptor into MemoryMap
1331 MemoryMap
->PhysicalStart
= MemoryMapDescriptor
->PhysicalStart
;
1332 MemoryMap
->VirtualStart
= MemoryMapDescriptor
->VirtualStart
;
1333 MemoryMap
->NumberOfPages
+= MemoryMapDescriptor
->NumberOfPages
;
1336 // Return MemoryMapDescriptor as the next available slot int he MemoryMap array
1338 return MemoryMapDescriptor
;
1343 // MemoryMapDescrtiptor could not be merged with any descriptors in MemoryMap.
1345 // Return the slot immediately after MemoryMapDescriptor as the next available
1346 // slot in the MemoryMap array
1348 return NEXT_MEMORY_DESCRIPTOR (MemoryMapDescriptor
, DescriptorSize
);
1352 This function returns a copy of the current memory map. The map is an array of
1353 memory descriptors, each of which describes a contiguous block of memory.
1355 @param MemoryMapSize A pointer to the size, in bytes, of the
1356 MemoryMap buffer. On input, this is the size of
1357 the buffer allocated by the caller. On output,
1358 it is the size of the buffer returned by the
1359 firmware if the buffer was large enough, or the
1360 size of the buffer needed to contain the map if
1361 the buffer was too small.
1362 @param MemoryMap A pointer to the buffer in which firmware places
1363 the current memory map.
1364 @param MapKey A pointer to the location in which firmware
1365 returns the key for the current memory map.
1366 @param DescriptorSize A pointer to the location in which firmware
1367 returns the size, in bytes, of an individual
1368 EFI_MEMORY_DESCRIPTOR.
1369 @param DescriptorVersion A pointer to the location in which firmware
1370 returns the version number associated with the
1371 EFI_MEMORY_DESCRIPTOR.
1373 @retval EFI_SUCCESS The memory map was returned in the MemoryMap
1375 @retval EFI_BUFFER_TOO_SMALL The MemoryMap buffer was too small. The current
1376 buffer size needed to hold the memory map is
1377 returned in MemoryMapSize.
1378 @retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.
1384 IN OUT UINTN
*MemoryMapSize
,
1385 IN OUT EFI_MEMORY_DESCRIPTOR
*MemoryMap
,
1387 OUT UINTN
*DescriptorSize
,
1388 OUT UINT32
*DescriptorVersion
1394 UINTN NumberOfRuntimeEntries
;
1397 EFI_GCD_MAP_ENTRY
*GcdMapEntry
;
1398 EFI_MEMORY_TYPE Type
;
1399 EFI_MEMORY_DESCRIPTOR
*MemoryMapStart
;
1402 // Make sure the parameters are valid
1404 if (MemoryMapSize
== NULL
) {
1405 return EFI_INVALID_PARAMETER
;
1408 CoreAcquireGcdMemoryLock ();
1411 // Count the number of Reserved and MMIO entries that are marked for runtime use
1413 NumberOfRuntimeEntries
= 0;
1414 for (Link
= mGcdMemorySpaceMap
.ForwardLink
; Link
!= &mGcdMemorySpaceMap
; Link
= Link
->ForwardLink
) {
1415 GcdMapEntry
= CR (Link
, EFI_GCD_MAP_ENTRY
, Link
, EFI_GCD_MAP_SIGNATURE
);
1416 if ((GcdMapEntry
->GcdMemoryType
== EfiGcdMemoryTypeReserved
) ||
1417 (GcdMapEntry
->GcdMemoryType
== EfiGcdMemoryTypeMemoryMappedIo
)) {
1418 if ((GcdMapEntry
->Attributes
& EFI_MEMORY_RUNTIME
) == EFI_MEMORY_RUNTIME
) {
1419 NumberOfRuntimeEntries
++;
1424 Size
= sizeof (EFI_MEMORY_DESCRIPTOR
);
1427 // Make sure Size != sizeof(EFI_MEMORY_DESCRIPTOR). This will
1428 // prevent people from having pointer math bugs in their code.
1429 // now you have to use *DescriptorSize to make things work.
1431 Size
+= sizeof(UINT64
) - (Size
% sizeof (UINT64
));
1433 if (DescriptorSize
!= NULL
) {
1434 *DescriptorSize
= Size
;
1437 if (DescriptorVersion
!= NULL
) {
1438 *DescriptorVersion
= EFI_MEMORY_DESCRIPTOR_VERSION
;
1441 CoreAcquireMemoryLock ();
1444 // Compute the buffer size needed to fit the entire map
1446 BufferSize
= Size
* NumberOfRuntimeEntries
;
1447 for (Link
= gMemoryMap
.ForwardLink
; Link
!= &gMemoryMap
; Link
= Link
->ForwardLink
) {
1451 if (*MemoryMapSize
< BufferSize
) {
1452 Status
= EFI_BUFFER_TOO_SMALL
;
1456 if (MemoryMap
== NULL
) {
1457 Status
= EFI_INVALID_PARAMETER
;
1464 ZeroMem (MemoryMap
, BufferSize
);
1465 MemoryMapStart
= MemoryMap
;
1466 for (Link
= gMemoryMap
.ForwardLink
; Link
!= &gMemoryMap
; Link
= Link
->ForwardLink
) {
1467 Entry
= CR (Link
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
1468 ASSERT (Entry
->VirtualStart
== 0);
1471 // Convert internal map into an EFI_MEMORY_DESCRIPTOR
1473 MemoryMap
->Type
= Entry
->Type
;
1474 MemoryMap
->PhysicalStart
= Entry
->Start
;
1475 MemoryMap
->VirtualStart
= Entry
->VirtualStart
;
1476 MemoryMap
->NumberOfPages
= RShiftU64 (Entry
->End
- Entry
->Start
+ 1, EFI_PAGE_SHIFT
);
1478 // If the memory type is EfiConventionalMemory, then determine if the range is part of a
1479 // memory type bin and needs to be converted to the same memory type as the rest of the
1480 // memory type bin in order to minimize EFI Memory Map changes across reboots. This
1481 // improves the chances for a successful S4 resume in the presence of minor page allocation
1482 // differences across reboots.
1484 if (MemoryMap
->Type
== EfiConventionalMemory
) {
1485 for (Type
= (EFI_MEMORY_TYPE
) 0; Type
< EfiMaxMemoryType
; Type
++) {
1486 if (mMemoryTypeStatistics
[Type
].Special
&&
1487 mMemoryTypeStatistics
[Type
].NumberOfPages
> 0 &&
1488 Entry
->Start
>= mMemoryTypeStatistics
[Type
].BaseAddress
&&
1489 Entry
->End
<= mMemoryTypeStatistics
[Type
].MaximumAddress
) {
1490 MemoryMap
->Type
= Type
;
1494 MemoryMap
->Attribute
= Entry
->Attribute
;
1495 if (MemoryMap
->Type
< EfiMaxMemoryType
) {
1496 if (mMemoryTypeStatistics
[MemoryMap
->Type
].Runtime
) {
1497 MemoryMap
->Attribute
|= EFI_MEMORY_RUNTIME
;
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
);
1508 for (Link
= mGcdMemorySpaceMap
.ForwardLink
; Link
!= &mGcdMemorySpaceMap
; Link
= Link
->ForwardLink
) {
1509 GcdMapEntry
= CR (Link
, EFI_GCD_MAP_ENTRY
, Link
, EFI_GCD_MAP_SIGNATURE
);
1510 if ((GcdMapEntry
->GcdMemoryType
== EfiGcdMemoryTypeReserved
) ||
1511 (GcdMapEntry
->GcdMemoryType
== EfiGcdMemoryTypeMemoryMappedIo
)) {
1512 if ((GcdMapEntry
->Attributes
& EFI_MEMORY_RUNTIME
) == EFI_MEMORY_RUNTIME
) {
1514 // Create EFI_MEMORY_DESCRIPTOR for every Reserved and MMIO GCD entries
1515 // that are marked for runtime use
1517 MemoryMap
->PhysicalStart
= GcdMapEntry
->BaseAddress
;
1518 MemoryMap
->VirtualStart
= 0;
1519 MemoryMap
->NumberOfPages
= RShiftU64 ((GcdMapEntry
->EndAddress
- GcdMapEntry
->BaseAddress
+ 1), EFI_PAGE_SHIFT
);
1520 MemoryMap
->Attribute
= GcdMapEntry
->Attributes
& ~EFI_MEMORY_PORT_IO
;
1522 if (GcdMapEntry
->GcdMemoryType
== EfiGcdMemoryTypeReserved
) {
1523 MemoryMap
->Type
= EfiReservedMemoryType
;
1524 } else if (GcdMapEntry
->GcdMemoryType
== EfiGcdMemoryTypeMemoryMappedIo
) {
1525 if ((GcdMapEntry
->Attributes
& EFI_MEMORY_PORT_IO
) == EFI_MEMORY_PORT_IO
) {
1526 MemoryMap
->Type
= EfiMemoryMappedIOPortSpace
;
1528 MemoryMap
->Type
= EfiMemoryMappedIO
;
1533 // Check to see if the new Memory Map Descriptor can be merged with an
1534 // existing descriptor if they are adjacent and have the same attributes
1536 MemoryMap
= MergeMemoryMapDescriptor (MemoryMapStart
, MemoryMap
, Size
);
1542 // Compute the size of the buffer actually used after all memory map descriptor merge operations
1544 BufferSize
= ((UINT8
*)MemoryMap
- (UINT8
*)MemoryMapStart
);
1546 Status
= EFI_SUCCESS
;
1550 // Update the map key finally
1552 if (MapKey
!= NULL
) {
1553 *MapKey
= mMemoryMapKey
;
1556 CoreReleaseMemoryLock ();
1558 CoreReleaseGcdMemoryLock ();
1560 *MemoryMapSize
= BufferSize
;
1567 Internal function. Used by the pool functions to allocate pages
1568 to back pool allocation requests.
1570 @param PoolType The type of memory for the new pool pages
1571 @param NumberOfPages No of pages to allocate
1572 @param Alignment Bits to align.
1574 @return The allocated memory, or NULL
1578 CoreAllocatePoolPages (
1579 IN EFI_MEMORY_TYPE PoolType
,
1580 IN UINTN NumberOfPages
,
1587 // Find the pages to convert
1589 Start
= FindFreePages (MAX_ADDRESS
, NumberOfPages
, PoolType
, Alignment
);
1592 // Convert it to boot services data
1595 DEBUG ((DEBUG_ERROR
| DEBUG_PAGE
, "AllocatePoolPages: failed to allocate %d pages\n", (UINT32
)NumberOfPages
));
1597 CoreConvertPages (Start
, NumberOfPages
, PoolType
);
1600 return (VOID
*)(UINTN
) Start
;
1605 Internal function. Frees pool pages allocated via AllocatePoolPages ()
1607 @param Memory The base address to free
1608 @param NumberOfPages The number of pages to free
1613 IN EFI_PHYSICAL_ADDRESS Memory
,
1614 IN UINTN NumberOfPages
1617 CoreConvertPages (Memory
, NumberOfPages
, EfiConventionalMemory
);
1623 Make sure the memory map is following all the construction rules,
1624 it is the last time to check memory map error before exit boot services.
1626 @param MapKey Memory map key
1628 @retval EFI_INVALID_PARAMETER Memory map not consistent with construction
1630 @retval EFI_SUCCESS Valid memory map.
1634 CoreTerminateMemoryMap (
1642 Status
= EFI_SUCCESS
;
1644 CoreAcquireMemoryLock ();
1646 if (MapKey
== mMemoryMapKey
) {
1649 // Make sure the memory map is following all the construction rules
1650 // This is the last chance we will be able to display any messages on
1651 // the console devices.
1654 for (Link
= gMemoryMap
.ForwardLink
; Link
!= &gMemoryMap
; Link
= Link
->ForwardLink
) {
1655 Entry
= CR(Link
, MEMORY_MAP
, Link
, MEMORY_MAP_SIGNATURE
);
1656 if ((Entry
->Attribute
& EFI_MEMORY_RUNTIME
) != 0) {
1657 if (Entry
->Type
== EfiACPIReclaimMemory
|| Entry
->Type
== EfiACPIMemoryNVS
) {
1658 DEBUG((DEBUG_ERROR
| DEBUG_PAGE
, "ExitBootServices: ACPI memory entry has RUNTIME attribute set.\n"));
1659 Status
= EFI_INVALID_PARAMETER
;
1662 if ((Entry
->Start
& (EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT
- 1)) != 0) {
1663 DEBUG((DEBUG_ERROR
| DEBUG_PAGE
, "ExitBootServices: A RUNTIME memory entry is not on a proper alignment.\n"));
1664 Status
= EFI_INVALID_PARAMETER
;
1667 if (((Entry
->End
+ 1) & (EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT
- 1)) != 0) {
1668 DEBUG((DEBUG_ERROR
| DEBUG_PAGE
, "ExitBootServices: A RUNTIME memory entry is not on a proper alignment.\n"));
1669 Status
= EFI_INVALID_PARAMETER
;
1676 // The map key they gave us matches what we expect. Fall through and
1677 // return success. In an ideal world we would clear out all of
1678 // EfiBootServicesCode and EfiBootServicesData. However this function
1679 // is not the last one called by ExitBootServices(), so we have to
1680 // preserve the memory contents.
1683 Status
= EFI_INVALID_PARAMETER
;
1687 CoreReleaseMemoryLock ();