Allocate.c

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#include <PiDxe.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DxeServicesLib.h>
 
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;
}