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audk/MdeModulePkg/Core/PiSmmCore/Pool.c

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/** @file
SMM Memory pool management functions.
Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<BR>
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.
**/
#include "PiSmmCore.h"
LIST_ENTRY mSmmPoolLists[SmmPoolTypeMax][MAX_POOL_INDEX];
//
// To cache the SMRAM base since when Loading modules At fixed address feature is enabled,
// all module is assigned an offset relative the SMRAM base in build time.
//
GLOBAL_REMOVE_IF_UNREFERENCED EFI_PHYSICAL_ADDRESS gLoadModuleAtFixAddressSmramBase = 0;
/**
Convert a UEFI memory type to SMM pool type.
@param[in] MemoryType Type of pool to allocate.
@return SMM pool type
**/
SMM_POOL_TYPE
UefiMemoryTypeToSmmPoolType (
IN EFI_MEMORY_TYPE MemoryType
)
{
ASSERT ((MemoryType == EfiRuntimeServicesCode) || (MemoryType == EfiRuntimeServicesData));
switch (MemoryType) {
case EfiRuntimeServicesCode:
return SmmPoolTypeCode;
case EfiRuntimeServicesData:
return SmmPoolTypeData;
default:
return SmmPoolTypeMax;
}
}
/**
Called to initialize the memory service.
@param SmramRangeCount Number of SMRAM Regions
@param SmramRanges Pointer to SMRAM Descriptors
**/
VOID
SmmInitializeMemoryServices (
IN UINTN SmramRangeCount,
IN EFI_SMRAM_DESCRIPTOR *SmramRanges
)
{
UINTN Index;
EFI_STATUS Status;
UINTN SmmPoolTypeIndex;
EFI_LOAD_FIXED_ADDRESS_CONFIGURATION_TABLE *LMFAConfigurationTable;
//
// Initialize Pool list
//
for (SmmPoolTypeIndex = 0; SmmPoolTypeIndex < SmmPoolTypeMax; SmmPoolTypeIndex++) {
for (Index = 0; Index < ARRAY_SIZE (mSmmPoolLists[SmmPoolTypeIndex]); Index++) {
InitializeListHead (&mSmmPoolLists[SmmPoolTypeIndex][Index]);
}
}
Status = EfiGetSystemConfigurationTable (
&gLoadFixedAddressConfigurationTableGuid,
(VOID **) &LMFAConfigurationTable
);
if (!EFI_ERROR (Status) && LMFAConfigurationTable != NULL) {
gLoadModuleAtFixAddressSmramBase = LMFAConfigurationTable->SmramBase;
}
//
// Add Free SMRAM regions
// Need add Free memory at first, to let gSmmMemoryMap record data
//
for (Index = 0; Index < SmramRangeCount; Index++) {
if ((SmramRanges[Index].RegionState & (EFI_ALLOCATED | EFI_NEEDS_TESTING | EFI_NEEDS_ECC_INITIALIZATION)) != 0) {
continue;
}
SmmAddMemoryRegion (
SmramRanges[Index].CpuStart,
SmramRanges[Index].PhysicalSize,
EfiConventionalMemory,
SmramRanges[Index].RegionState
);
}
//
// Add the allocated SMRAM regions
//
for (Index = 0; Index < SmramRangeCount; Index++) {
if ((SmramRanges[Index].RegionState & (EFI_ALLOCATED | EFI_NEEDS_TESTING | EFI_NEEDS_ECC_INITIALIZATION)) == 0) {
continue;
}
SmmAddMemoryRegion (
SmramRanges[Index].CpuStart,
SmramRanges[Index].PhysicalSize,
EfiConventionalMemory,
SmramRanges[Index].RegionState
);
}
}
/**
Internal Function. Allocate a pool by specified PoolIndex.
@param PoolType Type of pool to allocate.
@param PoolIndex Index which indicate the Pool size.
@param FreePoolHdr The returned Free pool.
@retval EFI_OUT_OF_RESOURCES Allocation failed.
@retval EFI_SUCCESS Pool successfully allocated.
**/
EFI_STATUS
InternalAllocPoolByIndex (
IN EFI_MEMORY_TYPE PoolType,
IN UINTN PoolIndex,
OUT FREE_POOL_HEADER **FreePoolHdr
)
{
EFI_STATUS Status;
FREE_POOL_HEADER *Hdr;
POOL_TAIL *Tail;
EFI_PHYSICAL_ADDRESS Address;
SMM_POOL_TYPE SmmPoolType;
Address = 0;
SmmPoolType = UefiMemoryTypeToSmmPoolType(PoolType);
ASSERT (PoolIndex <= MAX_POOL_INDEX);
Status = EFI_SUCCESS;
Hdr = NULL;
if (PoolIndex == MAX_POOL_INDEX) {
Status = SmmInternalAllocatePages (AllocateAnyPages, PoolType,
EFI_SIZE_TO_PAGES (MAX_POOL_SIZE << 1),
&Address, FALSE);
if (EFI_ERROR (Status)) {
return EFI_OUT_OF_RESOURCES;
}
Hdr = (FREE_POOL_HEADER *) (UINTN) Address;
} else if (!IsListEmpty (&mSmmPoolLists[SmmPoolType][PoolIndex])) {
Hdr = BASE_CR (GetFirstNode (&mSmmPoolLists[SmmPoolType][PoolIndex]), FREE_POOL_HEADER, Link);
RemoveEntryList (&Hdr->Link);
} else {
Status = InternalAllocPoolByIndex (PoolType, PoolIndex + 1, &Hdr);
if (!EFI_ERROR (Status)) {
Hdr->Header.Signature = 0;
Hdr->Header.Size >>= 1;
Hdr->Header.Available = TRUE;
Hdr->Header.Type = 0;
Tail = HEAD_TO_TAIL(&Hdr->Header);
Tail->Signature = 0;
Tail->Size = 0;
InsertHeadList (&mSmmPoolLists[SmmPoolType][PoolIndex], &Hdr->Link);
Hdr = (FREE_POOL_HEADER*)((UINT8*)Hdr + Hdr->Header.Size);
}
}
if (!EFI_ERROR (Status)) {
Hdr->Header.Signature = POOL_HEAD_SIGNATURE;
Hdr->Header.Size = MIN_POOL_SIZE << PoolIndex;
Hdr->Header.Available = FALSE;
Hdr->Header.Type = PoolType;
Tail = HEAD_TO_TAIL(&Hdr->Header);
Tail->Signature = POOL_TAIL_SIGNATURE;
Tail->Size = Hdr->Header.Size;
}
*FreePoolHdr = Hdr;
return Status;
}
/**
Internal Function. Free a pool by specified PoolIndex.
@param FreePoolHdr The pool to free.
@param PoolTail The pointer to the pool tail.
@retval EFI_SUCCESS Pool successfully freed.
**/
EFI_STATUS
InternalFreePoolByIndex (
IN FREE_POOL_HEADER *FreePoolHdr,
IN POOL_TAIL *PoolTail
)
{
UINTN PoolIndex;
SMM_POOL_TYPE SmmPoolType;
ASSERT ((FreePoolHdr->Header.Size & (FreePoolHdr->Header.Size - 1)) == 0);
ASSERT (((UINTN)FreePoolHdr & (FreePoolHdr->Header.Size - 1)) == 0);
ASSERT (FreePoolHdr->Header.Size >= MIN_POOL_SIZE);
SmmPoolType = UefiMemoryTypeToSmmPoolType(FreePoolHdr->Header.Type);
PoolIndex = (UINTN) (HighBitSet32 ((UINT32)FreePoolHdr->Header.Size) - MIN_POOL_SHIFT);
FreePoolHdr->Header.Signature = 0;
FreePoolHdr->Header.Available = TRUE;
FreePoolHdr->Header.Type = 0;
PoolTail->Signature = 0;
PoolTail->Size = 0;
ASSERT (PoolIndex < MAX_POOL_INDEX);
InsertHeadList (&mSmmPoolLists[SmmPoolType][PoolIndex], &FreePoolHdr->Link);
return EFI_SUCCESS;
}
/**
Allocate pool of a particular type.
@param PoolType Type of pool to allocate.
@param Size The amount of pool to allocate.
@param Buffer The address to return a pointer to the allocated
pool.
@retval EFI_INVALID_PARAMETER PoolType not valid.
@retval EFI_OUT_OF_RESOURCES Size exceeds max pool size or allocation failed.
@retval EFI_SUCCESS Pool successfully allocated.
**/
EFI_STATUS
EFIAPI
SmmInternalAllocatePool (
IN EFI_MEMORY_TYPE PoolType,
IN UINTN Size,
OUT VOID **Buffer
)
{
POOL_HEADER *PoolHdr;
POOL_TAIL *PoolTail;
FREE_POOL_HEADER *FreePoolHdr;
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS Address;
UINTN PoolIndex;
BOOLEAN HasPoolTail;
BOOLEAN NeedGuard;
UINTN NoPages;
Address = 0;
if (PoolType != EfiRuntimeServicesCode &&
PoolType != EfiRuntimeServicesData) {
return EFI_INVALID_PARAMETER;
}
NeedGuard = IsPoolTypeToGuard (PoolType);
HasPoolTail = !(NeedGuard &&
((PcdGet8 (PcdHeapGuardPropertyMask) & BIT7) == 0));
//
// Adjust the size by the pool header & tail overhead
//
Size += POOL_OVERHEAD;
if (Size > MAX_POOL_SIZE || NeedGuard) {
if (!HasPoolTail) {
Size -= sizeof (POOL_TAIL);
}
NoPages = EFI_SIZE_TO_PAGES (Size);
Status = SmmInternalAllocatePages (AllocateAnyPages, PoolType, NoPages,
&Address, NeedGuard);
if (EFI_ERROR (Status)) {
return Status;
}
if (NeedGuard) {
ASSERT (VerifyMemoryGuard (Address, NoPages) == TRUE);
Address = (EFI_PHYSICAL_ADDRESS)(UINTN)AdjustPoolHeadA (
Address,
NoPages,
Size
);
}
PoolHdr = (POOL_HEADER*)(UINTN)Address;
PoolHdr->Signature = POOL_HEAD_SIGNATURE;
PoolHdr->Size = EFI_PAGES_TO_SIZE (NoPages);
PoolHdr->Available = FALSE;
PoolHdr->Type = PoolType;
if (HasPoolTail) {
PoolTail = HEAD_TO_TAIL (PoolHdr);
PoolTail->Signature = POOL_TAIL_SIGNATURE;
PoolTail->Size = PoolHdr->Size;
}
*Buffer = PoolHdr + 1;
return Status;
}
Size = (Size + MIN_POOL_SIZE - 1) >> MIN_POOL_SHIFT;
PoolIndex = (UINTN) HighBitSet32 ((UINT32)Size);
if ((Size & (Size - 1)) != 0) {
PoolIndex++;
}
Status = InternalAllocPoolByIndex (PoolType, PoolIndex, &FreePoolHdr);
if (!EFI_ERROR(Status)) {
*Buffer = &FreePoolHdr->Header + 1;
}
return Status;
}
/**
Allocate pool of a particular type.
@param PoolType Type of pool to allocate.
@param Size The amount of pool to allocate.
@param Buffer The address to return a pointer to the allocated
pool.
@retval EFI_INVALID_PARAMETER PoolType not valid.
@retval EFI_OUT_OF_RESOURCES Size exceeds max pool size or allocation failed.
@retval EFI_SUCCESS Pool successfully allocated.
**/
EFI_STATUS
EFIAPI
SmmAllocatePool (
IN EFI_MEMORY_TYPE PoolType,
IN UINTN Size,
OUT VOID **Buffer
)
{
EFI_STATUS Status;
Status = SmmInternalAllocatePool (PoolType, Size, Buffer);
if (!EFI_ERROR (Status)) {
SmmCoreUpdateProfile (
(EFI_PHYSICAL_ADDRESS) (UINTN) RETURN_ADDRESS (0),
MemoryProfileActionAllocatePool,
PoolType,
Size,
*Buffer,
NULL
);
}
return Status;
}
/**
Frees pool.
@param Buffer The allocated pool entry to free.
@retval EFI_INVALID_PARAMETER Buffer is not a valid value.
@retval EFI_SUCCESS Pool successfully freed.
**/
EFI_STATUS
EFIAPI
SmmInternalFreePool (
IN VOID *Buffer
)
{
FREE_POOL_HEADER *FreePoolHdr;
POOL_TAIL *PoolTail;
BOOLEAN HasPoolTail;
BOOLEAN MemoryGuarded;
if (Buffer == NULL) {
return EFI_INVALID_PARAMETER;
}
MemoryGuarded = IsHeapGuardEnabled () &&
IsMemoryGuarded ((EFI_PHYSICAL_ADDRESS)(UINTN)Buffer);
HasPoolTail = !(MemoryGuarded &&
((PcdGet8 (PcdHeapGuardPropertyMask) & BIT7) == 0));
FreePoolHdr = (FREE_POOL_HEADER*)((POOL_HEADER*)Buffer - 1);
ASSERT (FreePoolHdr->Header.Signature == POOL_HEAD_SIGNATURE);
ASSERT (!FreePoolHdr->Header.Available);
if (FreePoolHdr->Header.Signature != POOL_HEAD_SIGNATURE) {
return EFI_INVALID_PARAMETER;
}
if (HasPoolTail) {
PoolTail = HEAD_TO_TAIL (&FreePoolHdr->Header);
ASSERT (PoolTail->Signature == POOL_TAIL_SIGNATURE);
ASSERT (FreePoolHdr->Header.Size == PoolTail->Size);
if (PoolTail->Signature != POOL_TAIL_SIGNATURE) {
return EFI_INVALID_PARAMETER;
}
if (FreePoolHdr->Header.Size != PoolTail->Size) {
return EFI_INVALID_PARAMETER;
}
} else {
PoolTail = NULL;
}
if (MemoryGuarded) {
Buffer = AdjustPoolHeadF ((EFI_PHYSICAL_ADDRESS)(UINTN)FreePoolHdr);
return SmmInternalFreePages (
(EFI_PHYSICAL_ADDRESS)(UINTN)Buffer,
EFI_SIZE_TO_PAGES (FreePoolHdr->Header.Size),
TRUE
);
}
if (FreePoolHdr->Header.Size > MAX_POOL_SIZE) {
ASSERT (((UINTN)FreePoolHdr & EFI_PAGE_MASK) == 0);
ASSERT ((FreePoolHdr->Header.Size & EFI_PAGE_MASK) == 0);
return SmmInternalFreePages (
(EFI_PHYSICAL_ADDRESS)(UINTN)FreePoolHdr,
EFI_SIZE_TO_PAGES (FreePoolHdr->Header.Size),
FALSE
);
}
return InternalFreePoolByIndex (FreePoolHdr, PoolTail);
}
/**
Frees pool.
@param Buffer The allocated pool entry to free.
@retval EFI_INVALID_PARAMETER Buffer is not a valid value.
@retval EFI_SUCCESS Pool successfully freed.
**/
EFI_STATUS
EFIAPI
SmmFreePool (
IN VOID *Buffer
)
{
EFI_STATUS Status;
Status = SmmInternalFreePool (Buffer);
if (!EFI_ERROR (Status)) {
SmmCoreUpdateProfile (
(EFI_PHYSICAL_ADDRESS) (UINTN) RETURN_ADDRESS (0),
MemoryProfileActionFreePool,
EfiMaxMemoryType,
0,
Buffer,
NULL
);
}
return Status;
}
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