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/** @file
This PPI produces functions to interpret and execute the PI boot script table.
This PPI is published by a PEIM and provides for the restoration of the platform's
configuration when resuming from the ACPI S3 power state. The ability to execute
the boot script may depend on the availability of other PPIs. For example, if
the boot script includes an SMBus command, this PEIM looks for the relevant PPI
that is able to execute that command.
Copyright (c) 2007 - 2009, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
@par Revision Reference:
This PPI is defined in UEFI Platform Initialization Specification 1.2 Volume 5:
Standards
**/
#ifndef __PEI_S3_RESUME_PPI_H__
#define __PEI_S3_RESUME_PPI_H__
///
/// Global ID for EFI_PEI_S3_RESUME_PPI
///
#define EFI_PEI_S3_RESUME_PPI_GUID \
{ \
0x4426CCB2, 0xE684, 0x4a8a, {0xAE, 0x40, 0x20, 0xD4, 0xB0, 0x25, 0xB7, 0x10 } \
}
///
/// Forward declaration for EFI_PEI_S3_RESUME_PPI
///
typedef struct _EFI_PEI_S3_RESUME_PPI EFI_PEI_S3_RESUME_PPI;
/**
Restores the platform to its preboot configuration for an S3 resume and
jumps to the OS waking vector.
This function will restore the platform to its pre-boot configuration that was
pre-stored in the boot script table and transfer control to OS waking vector.
Upon invocation, this function is responsible for locating the following
information before jumping to OS waking vector:
- ACPI tables
- boot script table
- any other information that it needs
The S3RestoreConfig() function then executes the pre-stored boot script table
and transitions the platform to the pre-boot state. The boot script is recorded
during regular boot using the EFI_S3_SAVE_STATE_PROTOCOL.Write() and
EFI_S3_SMM_SAVE_STATE_PROTOCOL.Write() functions. Finally, this function
transfers control to the OS waking vector. If the OS supports only a real-mode
waking vector, this function will switch from flat mode to real mode before
jumping to the waking vector. If all platform pre-boot configurations are
successfully restored and all other necessary information is ready, this
function will never return and instead will directly jump to the OS waking
vector. If this function returns, it indicates that the attempt to resume
from the ACPI S3 sleep state failed.
@param[in] PeiServices Pointer to the PEI Services Table
@retval EFI_ABORTED Execution of the S3 resume boot script table failed.
@retval EFI_NOT_FOUND Some necessary information that is used for the S3
resume boot path could not be located.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_PEI_S3_RESUME_PPI_RESTORE_CONFIG)(
IN EFI_PEI_SERVICES **PeiServices
);
/**
EFI_PEI_S3_RESUME_PPI accomplishes the firmware S3 resume boot
path and transfers control to OS.
**/
struct _EFI_PEI_S3_RESUME_PPI {
///
/// Restores the platform to its preboot configuration for an S3 resume and
/// jumps to the OS waking vector.
///
EFI_PEI_S3_RESUME_PPI_RESTORE_CONFIG S3RestoreConfig;
};
extern EFI_GUID gEfiPeiS3ResumePpiGuid;
#endif
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