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983 lines
31 KiB
983 lines
31 KiB
/** @file
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Support routines for memory allocation routines based
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on SMM Services Table services for SMM phase drivers.
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The PI System Management Mode Core Interface Specification only allows the use
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of EfiRuntimeServicesCode and EfiRuntimeServicesData memory types for memory
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allocations through the SMM Services Table as the SMRAM space should be
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reserved after BDS phase. The functions in the Memory Allocation Library use
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EfiBootServicesData as the default memory allocation type. For this SMM
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specific instance of the Memory Allocation Library, EfiRuntimeServicesData
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is used as the default memory type for all allocations. In addition,
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allocation for the Reserved memory types are not supported and will always
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return NULL.
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <PiSmm.h>
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#include <Protocol/SmmAccess2.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/SmmServicesTableLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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EFI_SMRAM_DESCRIPTOR *mSmramRanges;
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UINTN mSmramRangeCount;
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/**
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The constructor function caches SMRAM ranges that are present in the system.
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It will ASSERT() if SMM Access2 Protocol doesn't exist.
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It will ASSERT() if SMRAM ranges can't be got.
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It will ASSERT() if Resource can't be allocated for cache SMRAM range.
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It will always return EFI_SUCCESS.
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@param ImageHandle The firmware allocated handle for the EFI image.
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@param SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
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**/
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EFI_STATUS
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EFIAPI
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SmmMemoryAllocationLibConstructor (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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EFI_SMM_ACCESS2_PROTOCOL *SmmAccess;
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UINTN Size;
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//
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// Locate SMM Access2 Protocol
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//
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Status = gBS->LocateProtocol (
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&gEfiSmmAccess2ProtocolGuid,
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NULL,
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(VOID **)&SmmAccess
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);
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ASSERT_EFI_ERROR (Status);
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//
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// Get SMRAM range information
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//
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Size = 0;
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Status = SmmAccess->GetCapabilities (SmmAccess, &Size, NULL);
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ASSERT (Status == EFI_BUFFER_TOO_SMALL);
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mSmramRanges = (EFI_SMRAM_DESCRIPTOR *) AllocatePool (Size);
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ASSERT (mSmramRanges != NULL);
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Status = SmmAccess->GetCapabilities (SmmAccess, &Size, mSmramRanges);
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ASSERT_EFI_ERROR (Status);
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mSmramRangeCount = Size / sizeof (EFI_SMRAM_DESCRIPTOR);
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return EFI_SUCCESS;
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}
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/**
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If SMM driver exits with an error, it must call this routine
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to free the allocated resource before the exiting.
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@param[in] ImageHandle The firmware allocated handle for the EFI image.
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@param[in] SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The deconstructor always returns EFI_SUCCESS.
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**/
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EFI_STATUS
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EFIAPI
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SmmMemoryAllocationLibDestructor (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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FreePool (mSmramRanges);
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return EFI_SUCCESS;
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}
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/**
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Check whether the start address of buffer is within any of the SMRAM ranges.
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@param[in] Buffer The pointer to the buffer to be checked.
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@retval TRUE The buffer is in SMRAM ranges.
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@retval FALSE The buffer is out of SMRAM ranges.
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**/
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BOOLEAN
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EFIAPI
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BufferInSmram (
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IN VOID *Buffer
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)
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{
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UINTN Index;
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for (Index = 0; Index < mSmramRangeCount; Index ++) {
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if (((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer >= mSmramRanges[Index].CpuStart) &&
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((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer < (mSmramRanges[Index].CpuStart + mSmramRanges[Index].PhysicalSize))) {
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return TRUE;
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}
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}
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return FALSE;
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}
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/**
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Allocates one or more 4KB pages of a certain memory type.
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Allocates the number of 4KB pages of a certain memory type and returns a pointer
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to the allocated buffer. The buffer returned is aligned on a 4KB boundary. If
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Pages is 0, then NULL is returned. If there is not enough memory remaining to
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satisfy the request, then NULL is returned.
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@param MemoryType The type of memory to allocate.
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@param Pages The number of 4 KB pages to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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InternalAllocatePages (
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IN EFI_MEMORY_TYPE MemoryType,
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IN UINTN Pages
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)
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{
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EFI_STATUS Status;
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EFI_PHYSICAL_ADDRESS Memory;
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if (Pages == 0) {
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return NULL;
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}
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Status = gSmst->SmmAllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);
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if (EFI_ERROR (Status)) {
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return NULL;
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}
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return (VOID *) (UINTN) Memory;
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}
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/**
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Allocates one or more 4KB pages of type EfiRuntimeServicesData.
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Allocates the number of 4KB pages of type EfiRuntimeServicesData and returns a pointer
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to the allocated buffer. The buffer returned is aligned on a 4KB boundary. If
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Pages is 0, then NULL is returned. If there is not enough memory remaining to
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satisfy the request, then NULL is returned.
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@param Pages The number of 4 KB pages to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocatePages (
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IN UINTN Pages
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)
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{
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return InternalAllocatePages (EfiRuntimeServicesData, Pages);
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}
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/**
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Allocates one or more 4KB pages of type EfiRuntimeServicesData.
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Allocates the number of 4KB pages of type EfiRuntimeServicesData and returns a
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pointer to the allocated buffer. The buffer returned is aligned on a 4KB boundary.
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If Pages is 0, then NULL is returned. If there is not enough memory remaining
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to satisfy the request, then NULL is returned.
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@param Pages The number of 4 KB pages to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocateRuntimePages (
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IN UINTN Pages
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)
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{
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return InternalAllocatePages (EfiRuntimeServicesData, Pages);
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}
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/**
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Allocates one or more 4KB pages of type EfiReservedMemoryType.
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Allocates the number of 4KB pages of type EfiReservedMemoryType and returns a
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pointer to the allocated buffer. The buffer returned is aligned on a 4KB boundary.
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If Pages is 0, then NULL is returned. If there is not enough memory remaining
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to satisfy the request, then NULL is returned.
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@param Pages The number of 4 KB pages to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocateReservedPages (
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IN UINTN Pages
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)
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{
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return NULL;
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}
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/**
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Frees one or more 4KB pages that were previously allocated with one of the page allocation
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functions in the Memory Allocation Library.
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Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer.
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Buffer must have been allocated on a previous call to the page allocation services
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of the Memory Allocation Library. If it is not possible to free allocated pages,
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then this function will perform no actions.
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If Buffer was not allocated with a page allocation function in the Memory Allocation
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Library, then ASSERT().
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If Pages is zero, then ASSERT().
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@param Buffer The pointer to the buffer of pages to free.
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@param Pages The number of 4 KB pages to free.
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**/
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VOID
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EFIAPI
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FreePages (
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IN VOID *Buffer,
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IN UINTN Pages
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)
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{
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EFI_STATUS Status;
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ASSERT (Pages != 0);
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if (BufferInSmram (Buffer)) {
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//
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// When Buffer is in SMRAM range, it should be allocated by gSmst->SmmAllocatePages() service.
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// So, gSmst->SmmFreePages() service is used to free it.
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//
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Status = gSmst->SmmFreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);
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} else {
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//
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// When Buffer is out of SMRAM range, it should be allocated by gBS->AllocatePages() service.
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// So, gBS->FreePages() service is used to free it.
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//
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Status = gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);
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}
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ASSERT_EFI_ERROR (Status);
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}
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/**
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Allocates one or more 4KB pages of a certain memory type at a specified alignment.
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Allocates the number of 4KB pages specified by Pages of a certain memory type
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with an alignment specified by Alignment. The allocated buffer is returned.
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If Pages is 0, then NULL is returned. If there is not enough memory at the
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specified alignment remaining to satisfy the request, then NULL is returned.
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If Alignment is not a power of two and Alignment is not zero, then ASSERT().
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If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().
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@param MemoryType The type of memory to allocate.
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@param Pages The number of 4 KB pages to allocate.
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@param Alignment The requested alignment of the allocation.
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Must be a power of two.
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If Alignment is zero, then byte alignment is used.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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InternalAllocateAlignedPages (
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IN EFI_MEMORY_TYPE MemoryType,
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IN UINTN Pages,
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IN UINTN Alignment
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)
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{
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EFI_STATUS Status;
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EFI_PHYSICAL_ADDRESS Memory;
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UINTN AlignedMemory;
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UINTN AlignmentMask;
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UINTN UnalignedPages;
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UINTN RealPages;
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//
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// Alignment must be a power of two or zero.
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//
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ASSERT ((Alignment & (Alignment - 1)) == 0);
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if (Pages == 0) {
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return NULL;
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}
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if (Alignment > EFI_PAGE_SIZE) {
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//
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// Calculate the total number of pages since alignment is larger than page size.
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//
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AlignmentMask = Alignment - 1;
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RealPages = Pages + EFI_SIZE_TO_PAGES (Alignment);
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//
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// Make sure that Pages plus EFI_SIZE_TO_PAGES (Alignment) does not overflow.
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//
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ASSERT (RealPages > Pages);
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Status = gSmst->SmmAllocatePages (AllocateAnyPages, MemoryType, RealPages, &Memory);
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if (EFI_ERROR (Status)) {
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return NULL;
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}
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AlignedMemory = ((UINTN) Memory + AlignmentMask) & ~AlignmentMask;
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UnalignedPages = EFI_SIZE_TO_PAGES (AlignedMemory - (UINTN) Memory);
|
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if (UnalignedPages > 0) {
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//
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// Free first unaligned page(s).
|
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//
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|
Status = gSmst->SmmFreePages (Memory, UnalignedPages);
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ASSERT_EFI_ERROR (Status);
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}
|
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Memory = AlignedMemory + EFI_PAGES_TO_SIZE (Pages);
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UnalignedPages = RealPages - Pages - UnalignedPages;
|
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if (UnalignedPages > 0) {
|
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//
|
|
// Free last unaligned page(s).
|
|
//
|
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Status = gSmst->SmmFreePages (Memory, UnalignedPages);
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ASSERT_EFI_ERROR (Status);
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}
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} else {
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//
|
|
// Do not over-allocate pages in this case.
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|
//
|
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Status = gSmst->SmmAllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);
|
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if (EFI_ERROR (Status)) {
|
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return NULL;
|
|
}
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AlignedMemory = (UINTN) Memory;
|
|
}
|
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return (VOID *) AlignedMemory;
|
|
}
|
|
|
|
/**
|
|
Allocates one or more 4KB pages of type EfiRuntimeServicesData at a specified alignment.
|
|
|
|
Allocates the number of 4KB pages specified by Pages of type EfiRuntimeServicesData
|
|
with an alignment specified by Alignment. The allocated buffer is returned.
|
|
If Pages is 0, then NULL is returned. If there is not enough memory at the
|
|
specified alignment remaining to satisfy the request, then NULL is returned.
|
|
|
|
If Alignment is not a power of two and Alignment is not zero, then ASSERT().
|
|
If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().
|
|
|
|
@param Pages The number of 4 KB pages to allocate.
|
|
@param Alignment The requested alignment of the allocation.
|
|
Must be a power of two.
|
|
If Alignment is zero, then byte alignment is used.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
AllocateAlignedPages (
|
|
IN UINTN Pages,
|
|
IN UINTN Alignment
|
|
)
|
|
{
|
|
return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);
|
|
}
|
|
|
|
/**
|
|
Allocates one or more 4KB pages of type EfiRuntimeServicesData at a specified alignment.
|
|
|
|
Allocates the number of 4KB pages specified by Pages of type EfiRuntimeServicesData
|
|
with an alignment specified by Alignment. The allocated buffer is returned.
|
|
If Pages is 0, then NULL is returned. If there is not enough memory at the
|
|
specified alignment remaining to satisfy the request, then NULL is returned.
|
|
|
|
If Alignment is not a power of two and Alignment is not zero, then ASSERT().
|
|
If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().
|
|
|
|
@param Pages The number of 4 KB pages to allocate.
|
|
@param Alignment The requested alignment of the allocation.
|
|
Must be a power of two.
|
|
If Alignment is zero, then byte alignment is used.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
AllocateAlignedRuntimePages (
|
|
IN UINTN Pages,
|
|
IN UINTN Alignment
|
|
)
|
|
{
|
|
return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);
|
|
}
|
|
|
|
/**
|
|
Allocates one or more 4KB pages of type EfiReservedMemoryType at a specified alignment.
|
|
|
|
Allocates the number of 4KB pages specified by Pages of type EfiReservedMemoryType
|
|
with an alignment specified by Alignment. The allocated buffer is returned.
|
|
If Pages is 0, then NULL is returned. If there is not enough memory at the
|
|
specified alignment remaining to satisfy the request, then NULL is returned.
|
|
|
|
If Alignment is not a power of two and Alignment is not zero, then ASSERT().
|
|
If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().
|
|
|
|
@param Pages The number of 4 KB pages to allocate.
|
|
@param Alignment The requested alignment of the allocation.
|
|
Must be a power of two.
|
|
If Alignment is zero, then byte alignment is used.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
AllocateAlignedReservedPages (
|
|
IN UINTN Pages,
|
|
IN UINTN Alignment
|
|
)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
Frees one or more 4KB pages that were previously allocated with one of the aligned page
|
|
allocation functions in the Memory Allocation Library.
|
|
|
|
Frees the number of 4KB pages specified by Pages from the buffer specified by
|
|
Buffer. Buffer must have been allocated on a previous call to the aligned page
|
|
allocation services of the Memory Allocation Library. If it is not possible to
|
|
free allocated pages, then this function will perform no actions.
|
|
|
|
If Buffer was not allocated with an aligned page allocation function in the
|
|
Memory Allocation Library, then ASSERT().
|
|
If Pages is zero, then ASSERT().
|
|
|
|
@param Buffer The pointer to the buffer of pages to free.
|
|
@param Pages The number of 4 KB pages to free.
|
|
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
FreeAlignedPages (
|
|
IN VOID *Buffer,
|
|
IN UINTN Pages
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
ASSERT (Pages != 0);
|
|
if (BufferInSmram (Buffer)) {
|
|
//
|
|
// When Buffer is in SMRAM range, it should be allocated by gSmst->SmmAllocatePages() service.
|
|
// So, gSmst->SmmFreePages() service is used to free it.
|
|
//
|
|
Status = gSmst->SmmFreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);
|
|
} else {
|
|
//
|
|
// When Buffer is out of SMRAM range, it should be allocated by gBS->AllocatePages() service.
|
|
// So, gBS->FreePages() service is used to free it.
|
|
//
|
|
Status = gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);
|
|
}
|
|
ASSERT_EFI_ERROR (Status);
|
|
}
|
|
|
|
/**
|
|
Allocates a buffer of a certain pool type.
|
|
|
|
Allocates the number bytes specified by AllocationSize of a certain pool type
|
|
and returns a pointer to the allocated buffer. If AllocationSize is 0, then a
|
|
valid buffer of 0 size is returned. If there is not enough memory remaining to
|
|
satisfy the request, then NULL is returned.
|
|
|
|
@param MemoryType The type of memory to allocate.
|
|
@param AllocationSize The number of bytes to allocate.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
InternalAllocatePool (
|
|
IN EFI_MEMORY_TYPE MemoryType,
|
|
IN UINTN AllocationSize
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
VOID *Memory;
|
|
|
|
Status = gSmst->SmmAllocatePool (MemoryType, AllocationSize, &Memory);
|
|
if (EFI_ERROR (Status)) {
|
|
Memory = NULL;
|
|
}
|
|
return Memory;
|
|
}
|
|
|
|
/**
|
|
Allocates a buffer of type EfiRuntimeServicesData.
|
|
|
|
Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData
|
|
and returns a pointer to the allocated buffer. If AllocationSize is 0, then a
|
|
valid buffer of 0 size is returned. If there is not enough memory remaining to
|
|
satisfy the request, then NULL is returned.
|
|
|
|
@param AllocationSize The number of bytes to allocate.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
AllocatePool (
|
|
IN UINTN AllocationSize
|
|
)
|
|
{
|
|
return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);
|
|
}
|
|
|
|
/**
|
|
Allocates a buffer of type EfiRuntimeServicesData.
|
|
|
|
Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData
|
|
and returns a pointer to the allocated buffer. If AllocationSize is 0, then a
|
|
valid buffer of 0 size is returned. If there is not enough memory remaining to
|
|
satisfy the request, then NULL is returned.
|
|
|
|
@param AllocationSize The number of bytes to allocate.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
AllocateRuntimePool (
|
|
IN UINTN AllocationSize
|
|
)
|
|
{
|
|
return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);
|
|
}
|
|
|
|
/**
|
|
Allocates a buffer of type EfiReservedMemoryType.
|
|
|
|
Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType
|
|
and returns a pointer to the allocated buffer. If AllocationSize is 0, then a
|
|
valid buffer of 0 size is returned. If there is not enough memory remaining to
|
|
satisfy the request, then NULL is returned.
|
|
|
|
@param AllocationSize The number of bytes to allocate.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
AllocateReservedPool (
|
|
IN UINTN AllocationSize
|
|
)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
Allocates and zeros a buffer of a certain pool type.
|
|
|
|
Allocates the number bytes specified by AllocationSize of a certain pool type,
|
|
clears the buffer with zeros, and returns a pointer to the allocated buffer.
|
|
If AllocationSize is 0, then a valid buffer of 0 size is returned. If there is
|
|
not enough memory remaining to satisfy the request, then NULL is returned.
|
|
|
|
@param PoolType The type of memory to allocate.
|
|
@param AllocationSize The number of bytes to allocate and zero.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
InternalAllocateZeroPool (
|
|
IN EFI_MEMORY_TYPE PoolType,
|
|
IN UINTN AllocationSize
|
|
)
|
|
{
|
|
VOID *Memory;
|
|
|
|
Memory = InternalAllocatePool (PoolType, AllocationSize);
|
|
if (Memory != NULL) {
|
|
Memory = ZeroMem (Memory, AllocationSize);
|
|
}
|
|
return Memory;
|
|
}
|
|
|
|
/**
|
|
Allocates and zeros a buffer of type EfiRuntimeServicesData.
|
|
|
|
Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData,
|
|
clears the buffer with zeros, and returns a pointer to the allocated buffer.
|
|
If AllocationSize is 0, then a valid buffer of 0 size is returned. If there is
|
|
not enough memory remaining to satisfy the request, then NULL is returned.
|
|
|
|
@param AllocationSize The number of bytes to allocate and zero.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
AllocateZeroPool (
|
|
IN UINTN AllocationSize
|
|
)
|
|
{
|
|
return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);
|
|
}
|
|
|
|
/**
|
|
Allocates and zeros a buffer of type EfiRuntimeServicesData.
|
|
|
|
Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData,
|
|
clears the buffer with zeros, and returns a pointer to the allocated buffer.
|
|
If AllocationSize is 0, then a valid buffer of 0 size is returned. If there is
|
|
not enough memory remaining to satisfy the request, then NULL is returned.
|
|
|
|
@param AllocationSize The number of bytes to allocate and zero.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
AllocateRuntimeZeroPool (
|
|
IN UINTN AllocationSize
|
|
)
|
|
{
|
|
return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);
|
|
}
|
|
|
|
/**
|
|
Allocates and zeros a buffer of type EfiReservedMemoryType.
|
|
|
|
Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType,
|
|
clears the buffer with zeros, and returns a pointer to the allocated buffer.
|
|
If AllocationSize is 0, then a valid buffer of 0 size is returned. If there is
|
|
not enough memory remaining to satisfy the request, then NULL is returned.
|
|
|
|
@param AllocationSize The number of bytes to allocate and zero.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
AllocateReservedZeroPool (
|
|
IN UINTN AllocationSize
|
|
)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
Copies a buffer to an allocated buffer of a certain pool type.
|
|
|
|
Allocates the number bytes specified by AllocationSize of a certain pool type,
|
|
copies AllocationSize bytes from Buffer to the newly allocated buffer, and returns
|
|
a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer
|
|
of 0 size is returned. If there is not enough memory remaining to satisfy the
|
|
request, then NULL is returned. If Buffer is NULL, then ASSERT().
|
|
If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
|
|
@param PoolType The type of pool to allocate.
|
|
@param AllocationSize The number of bytes to allocate and zero.
|
|
@param Buffer The buffer to copy to the allocated buffer.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
InternalAllocateCopyPool (
|
|
IN EFI_MEMORY_TYPE PoolType,
|
|
IN UINTN AllocationSize,
|
|
IN CONST VOID *Buffer
|
|
)
|
|
{
|
|
VOID *Memory;
|
|
|
|
ASSERT (Buffer != NULL);
|
|
ASSERT (AllocationSize <= (MAX_ADDRESS - (UINTN) Buffer + 1));
|
|
|
|
Memory = InternalAllocatePool (PoolType, AllocationSize);
|
|
if (Memory != NULL) {
|
|
Memory = CopyMem (Memory, Buffer, AllocationSize);
|
|
}
|
|
return Memory;
|
|
}
|
|
|
|
/**
|
|
Copies a buffer to an allocated buffer of type EfiRuntimeServicesData.
|
|
|
|
Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData,
|
|
copies AllocationSize bytes from Buffer to the newly allocated buffer, and returns
|
|
a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer
|
|
of 0 size is returned. If there is not enough memory remaining to satisfy the
|
|
request, then NULL is returned.
|
|
|
|
If Buffer is NULL, then ASSERT().
|
|
If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
|
|
@param AllocationSize The number of bytes to allocate and zero.
|
|
@param Buffer The buffer to copy to the allocated buffer.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
AllocateCopyPool (
|
|
IN UINTN AllocationSize,
|
|
IN CONST VOID *Buffer
|
|
)
|
|
{
|
|
return InternalAllocateCopyPool (EfiRuntimeServicesData, AllocationSize, Buffer);
|
|
}
|
|
|
|
/**
|
|
Copies a buffer to an allocated buffer of type EfiRuntimeServicesData.
|
|
|
|
Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData,
|
|
copies AllocationSize bytes from Buffer to the newly allocated buffer, and returns
|
|
a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer
|
|
of 0 size is returned. If there is not enough memory remaining to satisfy the
|
|
request, then NULL is returned.
|
|
|
|
If Buffer is NULL, then ASSERT().
|
|
If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
|
|
@param AllocationSize The number of bytes to allocate and zero.
|
|
@param Buffer The buffer to copy to the allocated buffer.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
AllocateRuntimeCopyPool (
|
|
IN UINTN AllocationSize,
|
|
IN CONST VOID *Buffer
|
|
)
|
|
{
|
|
return InternalAllocateCopyPool (EfiRuntimeServicesData, AllocationSize, Buffer);
|
|
}
|
|
|
|
/**
|
|
Copies a buffer to an allocated buffer of type EfiReservedMemoryType.
|
|
|
|
Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType,
|
|
copies AllocationSize bytes from Buffer to the newly allocated buffer, and returns
|
|
a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer
|
|
of 0 size is returned. If there is not enough memory remaining to satisfy the
|
|
request, then NULL is returned.
|
|
|
|
If Buffer is NULL, then ASSERT().
|
|
If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
|
|
@param AllocationSize The number of bytes to allocate and zero.
|
|
@param Buffer The buffer to copy to the allocated buffer.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
AllocateReservedCopyPool (
|
|
IN UINTN AllocationSize,
|
|
IN CONST VOID *Buffer
|
|
)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
Reallocates a buffer of a specified memory type.
|
|
|
|
Allocates and zeros the number bytes specified by NewSize from memory of the type
|
|
specified by PoolType. If OldBuffer is not NULL, then the smaller of OldSize and
|
|
NewSize bytes are copied from OldBuffer to the newly allocated buffer, and
|
|
OldBuffer is freed. A pointer to the newly allocated buffer is returned.
|
|
If NewSize is 0, then a valid buffer of 0 size is returned. If there is not
|
|
enough memory remaining to satisfy the request, then NULL is returned.
|
|
|
|
If the allocation of the new buffer is successful and the smaller of NewSize
|
|
and OldSize is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().
|
|
|
|
@param PoolType The type of pool to allocate.
|
|
@param OldSize The size, in bytes, of OldBuffer.
|
|
@param NewSize The size, in bytes, of the buffer to reallocate.
|
|
@param OldBuffer The buffer to copy to the allocated buffer. This is an
|
|
optional parameter that may be NULL.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
InternalReallocatePool (
|
|
IN EFI_MEMORY_TYPE PoolType,
|
|
IN UINTN OldSize,
|
|
IN UINTN NewSize,
|
|
IN VOID *OldBuffer OPTIONAL
|
|
)
|
|
{
|
|
VOID *NewBuffer;
|
|
|
|
NewBuffer = InternalAllocateZeroPool (PoolType, NewSize);
|
|
if (NewBuffer != NULL && OldBuffer != NULL) {
|
|
CopyMem (NewBuffer, OldBuffer, MIN (OldSize, NewSize));
|
|
FreePool (OldBuffer);
|
|
}
|
|
return NewBuffer;
|
|
}
|
|
|
|
/**
|
|
Reallocates a buffer of type EfiRuntimeServicesData.
|
|
|
|
Allocates and zeros the number bytes specified by NewSize from memory of type
|
|
EfiRuntimeServicesData. If OldBuffer is not NULL, then the smaller of OldSize and
|
|
NewSize bytes are copied from OldBuffer to the newly allocated buffer, and
|
|
OldBuffer is freed. A pointer to the newly allocated buffer is returned.
|
|
If NewSize is 0, then a valid buffer of 0 size is returned. If there is not
|
|
enough memory remaining to satisfy the request, then NULL is returned.
|
|
|
|
If the allocation of the new buffer is successful and the smaller of NewSize
|
|
and OldSize is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().
|
|
|
|
@param OldSize The size, in bytes, of OldBuffer.
|
|
@param NewSize The size, in bytes, of the buffer to reallocate.
|
|
@param OldBuffer The buffer to copy to the allocated buffer. This is an
|
|
optional parameter that may be NULL.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
ReallocatePool (
|
|
IN UINTN OldSize,
|
|
IN UINTN NewSize,
|
|
IN VOID *OldBuffer OPTIONAL
|
|
)
|
|
{
|
|
return InternalReallocatePool (EfiRuntimeServicesData, OldSize, NewSize, OldBuffer);
|
|
}
|
|
|
|
/**
|
|
Reallocates a buffer of type EfiRuntimeServicesData.
|
|
|
|
Allocates and zeros the number bytes specified by NewSize from memory of type
|
|
EfiRuntimeServicesData. If OldBuffer is not NULL, then the smaller of OldSize
|
|
and NewSize bytes are copied from OldBuffer to the newly allocated buffer, and
|
|
OldBuffer is freed. A pointer to the newly allocated buffer is returned.
|
|
If NewSize is 0, then a valid buffer of 0 size is returned. If there is not
|
|
enough memory remaining to satisfy the request, then NULL is returned.
|
|
|
|
If the allocation of the new buffer is successful and the smaller of NewSize
|
|
and OldSize is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().
|
|
|
|
@param OldSize The size, in bytes, of OldBuffer.
|
|
@param NewSize The size, in bytes, of the buffer to reallocate.
|
|
@param OldBuffer The buffer to copy to the allocated buffer. This is an
|
|
optional parameter that may be NULL.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
ReallocateRuntimePool (
|
|
IN UINTN OldSize,
|
|
IN UINTN NewSize,
|
|
IN VOID *OldBuffer OPTIONAL
|
|
)
|
|
{
|
|
return InternalReallocatePool (EfiRuntimeServicesData, OldSize, NewSize, OldBuffer);
|
|
}
|
|
|
|
/**
|
|
Reallocates a buffer of type EfiReservedMemoryType.
|
|
|
|
Allocates and zeros the number bytes specified by NewSize from memory of type
|
|
EfiReservedMemoryType. If OldBuffer is not NULL, then the smaller of OldSize
|
|
and NewSize bytes are copied from OldBuffer to the newly allocated buffer, and
|
|
OldBuffer is freed. A pointer to the newly allocated buffer is returned.
|
|
If NewSize is 0, then a valid buffer of 0 size is returned. If there is not
|
|
enough memory remaining to satisfy the request, then NULL is returned.
|
|
|
|
If the allocation of the new buffer is successful and the smaller of NewSize
|
|
and OldSize is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().
|
|
|
|
@param OldSize The size, in bytes, of OldBuffer.
|
|
@param NewSize The size, in bytes, of the buffer to reallocate.
|
|
@param OldBuffer The buffer to copy to the allocated buffer. This is an
|
|
optional parameter that may be NULL.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
ReallocateReservedPool (
|
|
IN UINTN OldSize,
|
|
IN UINTN NewSize,
|
|
IN VOID *OldBuffer OPTIONAL
|
|
)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
Frees a buffer that was previously allocated with one of the pool allocation
|
|
functions in the Memory Allocation Library.
|
|
|
|
Frees the buffer specified by Buffer. Buffer must have been allocated on a
|
|
previous call to the pool allocation services of the Memory Allocation Library.
|
|
If it is not possible to free pool resources, then this function will perform
|
|
no actions.
|
|
|
|
If Buffer was not allocated with a pool allocation function in the Memory
|
|
Allocation Library, then ASSERT().
|
|
|
|
@param Buffer The pointer to the buffer to free.
|
|
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
FreePool (
|
|
IN VOID *Buffer
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
if (BufferInSmram (Buffer)) {
|
|
//
|
|
// When Buffer is in SMRAM range, it should be allocated by gSmst->SmmAllocatePool() service.
|
|
// So, gSmst->SmmFreePool() service is used to free it.
|
|
//
|
|
Status = gSmst->SmmFreePool (Buffer);
|
|
} else {
|
|
//
|
|
// When Buffer is out of SMRAM range, it should be allocated by gBS->AllocatePool() service.
|
|
// So, gBS->FreePool() service is used to free it.
|
|
//
|
|
Status = gBS->FreePool (Buffer);
|
|
}
|
|
ASSERT_EFI_ERROR (Status);
|
|
}
|