diff options
Diffstat (limited to 'MdePkg/Include/Ppi/S3Resume2.h')
| -rw-r--r-- | MdePkg/Include/Ppi/S3Resume2.h | 54 |
1 files changed, 24 insertions, 30 deletions
diff --git a/MdePkg/Include/Ppi/S3Resume2.h b/MdePkg/Include/Ppi/S3Resume2.h index 2645c22975bc..eb051ae85c78 100644 --- a/MdePkg/Include/Ppi/S3Resume2.h +++ b/MdePkg/Include/Ppi/S3Resume2.h @@ -1,23 +1,17 @@ /** @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) 2010, Intel Corporation. All rights reserved.<BR> - 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. + 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) 2010 - 2018, Intel Corporation. All rights reserved.<BR> + SPDX-License-Identifier: BSD-2-Clause-Patent @par Revision Reference: - This PPI is defined in UEFI Platform Initialization Specification 1.2 Volume 5: + This PPI is defined in UEFI Platform Initialization Specification 1.2 Volume 5: Standards **/ @@ -42,30 +36,30 @@ typedef struct _EFI_PEI_S3_RESUME2_PPI EFI_PEI_S3_RESUME2_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 + 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 + 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 + + 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. - + 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] This Pointer to this instance of the PEI_S3_RESUME_PPI @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 + @retval EFI_NOT_FOUND Some necessary information that is used for the S3 resume boot path could not be located. **/ |