364f63c065
PI 1.6 has supported pre permanent memory page allocation, to make sure the allocated memory is physical memory for DMA, the patch is to check memory discovered PPI installed or not first before calling AllocatePages. Cc: Ruiyu Ni <ruiyu.ni@intel.com> Cc: Hao Wu <hao.a.wu@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com> Reviewed-by: Hao Wu <hao.a.wu@intel.com>
58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
/** @file
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Debug Port Library implementation based on usb3 debug port.
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Copyright (c) 2014 - 2017, 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 <PiPei.h>
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#include <Library/PeiServicesLib.h>
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#include <Ppi/MemoryDiscovered.h>
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#include "DebugCommunicationLibUsb3Internal.h"
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/**
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Allocate aligned memory for XHC's usage.
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@param BufferSize The size, in bytes, of the Buffer.
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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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AllocateAlignBuffer (
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IN UINTN BufferSize
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)
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{
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VOID *Buf;
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EFI_PHYSICAL_ADDRESS Address;
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EFI_STATUS Status;
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VOID *MemoryDiscoveredPpi;
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Buf = NULL;
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//
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// Make sure the allocated memory is physical memory.
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//
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Status = PeiServicesLocatePpi (
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&gEfiPeiMemoryDiscoveredPpiGuid,
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0,
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NULL,
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(VOID **) &MemoryDiscoveredPpi
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);
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if (!EFI_ERROR (Status)) {
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Status = PeiServicesAllocatePages (EfiACPIMemoryNVS, EFI_SIZE_TO_PAGES (BufferSize), &Address);
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if (!EFI_ERROR (Status)) {
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Buf = (VOID *)(UINTN) Address;
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}
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}
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return Buf;
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}
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