mirror of https://github.com/acidanthera/audk.git
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
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/** @file
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DxeServicesLib memory allocation routines
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Copyright (c) 2018, Linaro, Ltd. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available
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under the terms and conditions of the BSD License which accompanies this
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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 <PiDxe.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/DxeServicesLib.h>
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/**
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Allocates one or more 4KB pages of a given type from a memory region that is
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accessible to PEI.
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Allocates the number of 4KB pages of type 'MemoryType' and returns a
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pointer to the allocated buffer. The buffer returned is aligned on a 4KB
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boundary. If Pages is 0, then NULL is returned. If there is not enough
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memory remaining to satisfy the request, then NULL is returned.
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@param[in] MemoryType The memory type to allocate
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@param[in] 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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AllocatePeiAccessiblePages (
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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 = gBS->AllocatePages (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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