mirror of https://github.com/acidanthera/audk.git
115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
/**@file
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Copyright (c) 2007, Intel Corporation
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All rights reserved. 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 "InternalBdsLib.h"
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/**
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Get current boot mode.
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@param HobStart Start pointer of hob list
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@param BootMode Current boot mode recorded in PHIT hob
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@retval EFI_NOT_FOUND Invalid hob header
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@retval EFI_SUCCESS Boot mode found
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**/
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EFI_STATUS
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R8_GetHobBootMode (
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IN VOID *HobStart,
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OUT EFI_BOOT_MODE *BootMode
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)
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{
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//
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// Porting Guide:
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// This library interface is simply obsolete.
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// Include the source code to user code.
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// In fact, since EFI_HANDOFF_HOB must be the first Hob,
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// the following code can retrieve boot mode.
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//
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// EFI_HOB_HANDOFF_INFO_TABLE *HandOffHob;
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//
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// HandOffHob = GetHobList ();
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// ASSERT (HandOffHob->Header.HobType == EFI_HOB_TYPE_HANDOFF);
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//
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// BootMode = HandOffHob->BootMode;
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//
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EFI_PEI_HOB_POINTERS Hob;
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Hob.Raw = HobStart;
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if (Hob.Header->HobType != EFI_HOB_TYPE_HANDOFF) {
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return EFI_NOT_FOUND;
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}
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*BootMode = Hob.HandoffInformationTable->BootMode;
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return EFI_SUCCESS;
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}
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/**
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Get the next guid hob.
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@param HobStart A pointer to the start hob.
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@param Guid A pointer to a guid.
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@param Buffer A pointer to the buffer.
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@param BufferSize Buffer size.
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@retval EFI_NOT_FOUND Next Guid hob not found
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@retval EFI_SUCCESS Next Guid hob found and data for this Guid got
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@retval EFI_INVALID_PARAMETER invalid parameter
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**/
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EFI_STATUS
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R8_GetNextGuidHob (
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IN OUT VOID **HobStart,
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IN EFI_GUID * Guid,
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OUT VOID **Buffer,
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OUT UINTN *BufferSize OPTIONAL
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)
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{
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//
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// Porting Guide:
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// This library interface is changed substantially with R9 counerpart GetNextGuidHob ().
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// 1. R9 GetNextGuidHob has two parameters and returns the matched GUID HOB from the StartHob.
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// 2. R9 GetNextGuidHob does not strip the HOB header, so caller is required to apply
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// GET_GUID_HOB_DATA () and GET_GUID_HOB_DATA_SIZE () to extract the data section and its
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// size info respectively.
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// 3. this function does not skip the starting HOB pointer unconditionally:
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// it returns HobStart back if HobStart itself meets the requirement;
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// caller is required to use GET_NEXT_HOB() if it wishes to skip current HobStart.
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//
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EFI_PEI_HOB_POINTERS GuidHob;
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if (Buffer == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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GuidHob.Raw = GetNextGuidHob (Guid, *HobStart);
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if (GuidHob.Raw == NULL) {
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return EFI_NOT_FOUND;
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}
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*Buffer = GET_GUID_HOB_DATA (GuidHob.Guid);
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if (BufferSize != NULL) {
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*BufferSize = GET_GUID_HOB_DATA_SIZE (GuidHob.Guid);
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}
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*HobStart = GET_NEXT_HOB (GuidHob);
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return EFI_SUCCESS;
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}
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