mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-21 15:57:42 +01:00
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/** @file
|
|
DxeServicesLib memory allocation routines
|
|
|
|
Copyright (c) 2018, Linaro, Ltd. All rights reserved.<BR>
|
|
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#include <PiDxe.h>
|
|
#include <Library/UefiBootServicesTableLib.h>
|
|
#include <Library/DxeServicesLib.h>
|
|
|
|
/**
|
|
Allocates one or more 4KB pages of a given type from a memory region that is
|
|
accessible to PEI.
|
|
|
|
Allocates the number of 4KB pages of type 'MemoryType' and returns a
|
|
pointer to the allocated buffer. The buffer returned is aligned on a 4KB
|
|
boundary. If Pages is 0, then NULL is returned. If there is not enough
|
|
memory remaining to satisfy the request, then NULL is returned.
|
|
|
|
@param[in] MemoryType The memory type to allocate
|
|
@param[in] Pages The number of 4 KB pages to allocate.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
AllocatePeiAccessiblePages (
|
|
IN EFI_MEMORY_TYPE MemoryType,
|
|
IN UINTN Pages
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_PHYSICAL_ADDRESS Memory;
|
|
|
|
if (Pages == 0) {
|
|
return NULL;
|
|
}
|
|
|
|
Status = gBS->AllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);
|
|
if (EFI_ERROR (Status)) {
|
|
return NULL;
|
|
}
|
|
return (VOID *)(UINTN)Memory;
|
|
}
|