135 lines
4.7 KiB
C
135 lines
4.7 KiB
C
/** @file
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# Description file for BootState Variable Information during PEI Phase.
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#
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#@copyright
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# INTEL CONFIDENTIAL
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# Copyright 2020 Intel Corporation.
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#
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# The source code contained or described herein and all documents related to the
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# source code ("Material") are owned by Intel Corporation or its suppliers or
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# licensors. Title to the Material remains with Intel Corporation or its suppliers
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# and licensors. The Material may contain trade secrets and proprietary and
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# confidential information of Intel Corporation and its suppliers and licensors,
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# and is protected by worldwide copyright and trade secret laws and treaty
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# provisions. No part of the Material may be used, copied, reproduced, modified,
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# published, uploaded, posted, transmitted, distributed, or disclosed in any way
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# without Intel's prior express written permission.
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#
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# No license under any patent, copyright, trade secret or other intellectual
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# property right is granted to or conferred upon you by disclosure or delivery
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# of the Materials, either expressly, by implication, inducement, estoppel or
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# otherwise. Any license under such intellectual property rights must be
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# express and approved by Intel in writing.
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#
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# Unless otherwise agreed by Intel in writing, you may not remove or alter
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# this notice or any other notice embedded in Materials by Intel or
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# Intel's suppliers or licensors in any way.
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#
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# This file contains a 'Sample Driver' and is licensed as such under the terms
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# of your license agreement with Intel or your vendor. This file may be modified
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# by the user, subject to the additional terms of the license agreement.
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#
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# @par Specification Reference:
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**/
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#include <PiPei.h>
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#include <Library/DebugLib.h>
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#include <BootStateLib.h>
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#include <Library/PeiServicesLib.h>
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#include <Library/PeiServicesTablePointerLib.h>
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#include <Ppi/ReadOnlyVariable2.h>
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#include <Guid/BootStateCapsule.h>
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/**
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This function call checks if BootState variable is present.
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BootState variable is not present on the first boot after flashing image.
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BootState variable got set end of Dxe phase.
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@retval FALSE It's the first boot after reflashing.
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@retval TRUE It's not the first boot after reflashing.
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**/
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BOOLEAN
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EFIAPI
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IsBootStatePresent (
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VOID
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)
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{
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EFI_STATUS Status;
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EFI_PEI_READ_ONLY_VARIABLE2_PPI *PeiVar;
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BOOLEAN BootState;
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UINTN DataSize;
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Status = PeiServicesLocatePpi (
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&gEfiPeiReadOnlyVariable2PpiGuid,
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0,
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NULL,
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(VOID **)&PeiVar
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);
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ASSERT_EFI_ERROR(Status);
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///
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/// Get last Boot State Variable From NVRAM
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///
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DataSize = sizeof(BOOLEAN);
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Status = PeiVar->GetVariable (
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PeiVar,
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BOOT_STATE_VARIABLE_NAME,
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&gBootStateGuid,
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NULL,
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&DataSize,
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&BootState
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);
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if (Status == EFI_SUCCESS) {
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DEBUG ((DEBUG_INFO, "PeiIsBootStatePresent : BootState is present.\n"));
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return TRUE;
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} else if (Status == EFI_NOT_FOUND) {
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DEBUG ((DEBUG_INFO, "PeiIsBootStatePresent : BootState is NOT present.\n"));
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return FALSE;
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} else {
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DEBUG ((DEBUG_ERROR, "PeiIsBootStatePresent : Get variable failure.\n"));
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ASSERT_EFI_ERROR (Status);
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return FALSE;
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}
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}
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/**
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This function checks is the very first boot after BIOS flash or Capsule update for EC/BIOS.
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@param[in, out] BootStateAfterCapsule out,0 its second boot after capsule updated
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out,1 its very first boot after capsule updated
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@retval status Very first boot after capsule update
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@retval EFI_SUCCESS Get Variable BootStateAfterCapsule success.
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@retval Others Returned error status on BootStateAfterCapsule GetVariable ().
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**/
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EFI_STATUS
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EFIAPI
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GetBootStateAfterCapsule(
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IN OUT UINT8 *BootStateAfterCapsule
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)
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{
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EFI_STATUS Status;
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EFI_PEI_READ_ONLY_VARIABLE2_PPI *PeiVar;
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UINTN Size;
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Status = PeiServicesLocatePpi (
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&gEfiPeiReadOnlyVariable2PpiGuid,
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0,
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NULL,
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(VOID **)&PeiVar
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);
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ASSERT_EFI_ERROR(Status);
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Size = sizeof(BOOLEAN);
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Status = PeiVar->GetVariable (
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PeiVar,
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BOOT_STATE_AFTER_CAPSULE_VARIABLE_NAME,
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&gBootStateAfterCapsuleGuid,
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NULL,
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&Size,
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BootStateAfterCapsule
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);
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if (EFI_ERROR(Status)) {
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return Status;
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}else {
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return EFI_SUCCESS;
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}
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}
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