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93 lines
3.5 KiB
93 lines
3.5 KiB
4 years ago
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/** @file
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This PPI produces functions to interpret and execute the PI boot script table.
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This PPI is published by a PEIM and provides for the restoration of the platform's
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configuration when resuming from the ACPI S3 power state. The ability to execute
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the boot script may depend on the availability of other PPIs. For example, if
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the boot script includes an SMBus command, this PEIM looks for the relevant PPI
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that is able to execute that command.
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Copyright (c) 2010 - 2018, 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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@par Revision Reference:
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This PPI is defined in UEFI Platform Initialization Specification 1.2 Volume 5:
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Standards
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**/
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#ifndef __PEI_S3_RESUME_PPI_H__
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#define __PEI_S3_RESUME_PPI_H__
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///
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/// Global ID for EFI_PEI_S3_RESUME2_PPI
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///
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#define EFI_PEI_S3_RESUME2_PPI_GUID \
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{ \
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0x6D582DBC, 0xDB85, 0x4514, {0x8F, 0xCC, 0x5A, 0xDF, 0x62, 0x27, 0xB1, 0x47 } \
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}
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///
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/// Forward declaration for EFI_PEI_S3_RESUME_PPI
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///
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typedef struct _EFI_PEI_S3_RESUME2_PPI EFI_PEI_S3_RESUME2_PPI;
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/**
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Restores the platform to its preboot configuration for an S3 resume and
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jumps to the OS waking vector.
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This function will restore the platform to its pre-boot configuration that was
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pre-stored in the boot script table and transfer control to OS waking vector.
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Upon invocation, this function is responsible for locating the following
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information before jumping to OS waking vector:
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- ACPI tables
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- boot script table
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- any other information that it needs
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The S3RestoreConfig() function then executes the pre-stored boot script table
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and transitions the platform to the pre-boot state. The boot script is recorded
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during regular boot using the EFI_S3_SAVE_STATE_PROTOCOL.Write() and
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EFI_S3_SMM_SAVE_STATE_PROTOCOL.Write() functions. Finally, this function
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transfers control to the OS waking vector. If the OS supports only a real-mode
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waking vector, this function will switch from flat mode to real mode before
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jumping to the waking vector. If all platform pre-boot configurations are
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successfully restored and all other necessary information is ready, this
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function will never return and instead will directly jump to the OS waking
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vector. If this function returns, it indicates that the attempt to resume
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from the ACPI S3 sleep state failed.
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@param[in] This Pointer to this instance of the PEI_S3_RESUME_PPI
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@retval EFI_ABORTED Execution of the S3 resume boot script table failed.
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@retval EFI_NOT_FOUND Some necessary information that is used for the S3
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resume boot path could not be located.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_PEI_S3_RESUME_PPI_RESTORE_CONFIG2)(
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IN EFI_PEI_S3_RESUME2_PPI *This
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);
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/**
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EFI_PEI_S3_RESUME2_PPI accomplishes the firmware S3 resume boot
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path and transfers control to OS.
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**/
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struct _EFI_PEI_S3_RESUME2_PPI {
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///
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/// Restores the platform to its preboot configuration for an S3 resume and
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/// jumps to the OS waking vector.
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///
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EFI_PEI_S3_RESUME_PPI_RESTORE_CONFIG2 S3RestoreConfig2;
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};
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extern EFI_GUID gEfiPeiS3Resume2PpiGuid;
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#endif
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