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171 lines
8.8 KiB
C
171 lines
8.8 KiB
C
/** @file
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S3 Save State Protocol as defined in PI 1.6(Errata A) Specification VOLUME 5 Standard.
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This protocol is used by DXE PI module to store or record various IO operations
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to be replayed during an S3 resume.
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This protocol is not required for all platforms.
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Copyright (c) 2009 - 2019, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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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 __S3_SAVE_STATE_H__
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#define __S3_SAVE_STATE_H__
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#define EFI_S3_SAVE_STATE_PROTOCOL_GUID \
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{ 0xe857caf6, 0xc046, 0x45dc, { 0xbe, 0x3f, 0xee, 0x7, 0x65, 0xfb, 0xa8, 0x87 }}
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typedef VOID *EFI_S3_BOOT_SCRIPT_POSITION;
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typedef struct _EFI_S3_SAVE_STATE_PROTOCOL EFI_S3_SAVE_STATE_PROTOCOL;
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/**
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Record operations that need to be replayed during an S3 resume.
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This function is used to store an OpCode to be replayed as part of the S3 resume boot path. It is
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assumed this protocol has platform specific mechanism to store the OpCode set and replay them
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during the S3 resume.
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@param[in] This A pointer to the EFI_S3_SAVE_STATE_PROTOCOL instance.
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@param[in] OpCode The operation code (opcode) number.
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@param[in] ... Argument list that is specific to each opcode. See the following subsections for the
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definition of each opcode.
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@retval EFI_SUCCESS The operation succeeded. A record was added into the specified
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script table.
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@retval EFI_INVALID_PARAMETER The parameter is illegal or the given boot script is not supported.
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@retval EFI_OUT_OF_RESOURCES There is insufficient memory to store the boot script.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_S3_SAVE_STATE_WRITE)(
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IN CONST EFI_S3_SAVE_STATE_PROTOCOL *This,
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IN UINTN OpCode,
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...
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);
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/**
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Record operations that need to be replayed during an S3 resume.
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This function is used to store an OpCode to be replayed as part of the S3 resume boot path. It is
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assumed this protocol has platform specific mechanism to store the OpCode set and replay them
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during the S3 resume.
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The opcode is inserted before or after the specified position in the boot script table. If Position is
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NULL then that position is after the last opcode in the table (BeforeOrAfter is TRUE) or before
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the first opcode in the table (BeforeOrAfter is FALSE). The position which is pointed to by
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Position upon return can be used for subsequent insertions.
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This function has a variable parameter list. The exact parameter list depends on the OpCode that is
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passed into the function. If an unsupported OpCode or illegal parameter list is passed in, this
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function returns EFI_INVALID_PARAMETER.
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If there are not enough resources available for storing more scripts, this function returns
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EFI_OUT_OF_RESOURCES.
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OpCode values of 0x80 - 0xFE are reserved for implementation specific functions.
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@param[in] This A pointer to the EFI_S3_SAVE_STATE_PROTOCOL instance.
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@param[in] BeforeOrAfter Specifies whether the opcode is stored before (TRUE) or after (FALSE) the position
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in the boot script table specified by Position. If Position is NULL or points to
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NULL then the new opcode is inserted at the beginning of the table (if TRUE) or end
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of the table (if FALSE).
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@param[in, out] Position On entry, specifies the position in the boot script table where the opcode will be
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inserted, either before or after, depending on BeforeOrAfter. On exit, specifies
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the position of the inserted opcode in the boot script table.
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@param[in] OpCode The operation code (opcode) number. See "Related Definitions" in Write() for the
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defined opcode types.
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@param[in] ... Argument list that is specific to each opcode. See the following subsections for the
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definition of each opcode.
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@retval EFI_SUCCESS The operation succeeded. An opcode was added into the script.
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@retval EFI_INVALID_PARAMETER The Opcode is an invalid opcode value.
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@retval EFI_INVALID_PARAMETER The Position is not a valid position in the boot script table.
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@retval EFI_OUT_OF_RESOURCES There is insufficient memory to store the boot script table.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_S3_SAVE_STATE_INSERT)(
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IN CONST EFI_S3_SAVE_STATE_PROTOCOL *This,
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IN BOOLEAN BeforeOrAfter,
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IN OUT EFI_S3_BOOT_SCRIPT_POSITION *Position OPTIONAL,
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IN UINTN OpCode,
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...
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);
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/**
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Find a label within the boot script table and, if not present, optionally create it.
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If the label Label is already exists in the boot script table, then no new label is created, the
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position of the Label is returned in *Position and EFI_SUCCESS is returned.
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If the label Label does not already exist and CreateIfNotFound is TRUE, then it will be
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created before or after the specified position and EFI_SUCCESS is returned.
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If the label Label does not already exist and CreateIfNotFound is FALSE, then
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EFI_NOT_FOUND is returned.
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@param[in] This A pointer to the EFI_S3_SAVE_STATE_PROTOCOL instance.
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@param[in] BeforeOrAfter Specifies whether the label is stored before (TRUE) or after (FALSE) the position in
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the boot script table specified by Position. If Position is NULL or points to
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NULL then the new label is inserted at the beginning of the table (if TRUE) or end of
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the table (if FALSE).
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@param[in] CreateIfNotFound Specifies whether the label will be created if the label does not exists (TRUE) or not (FALSE).
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@param[in, out] Position On entry, specifies the position in the boot script table where the label will be inserted,
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either before or after, depending on BeforeOrAfter. On exit, specifies the position
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of the inserted label in the boot script table.
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@param[in] Label Points to the label which will be inserted in the boot script table.
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@retval EFI_SUCCESS The label already exists or was inserted.
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@retval EFI_NOT_FOUND The label did not already exist and CreateifNotFound was FALSE.
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@retval EFI_INVALID_PARAMETER The Label is NULL or points to an empty string.
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@retval EFI_INVALID_PARAMETER The Position is not a valid position in the boot script table.
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@retval EFI_OUT_OF_RESOURCES There is insufficient memory to store the boot script.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_S3_SAVE_STATE_LABEL)(
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IN CONST EFI_S3_SAVE_STATE_PROTOCOL *This,
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IN BOOLEAN BeforeOrAfter,
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IN BOOLEAN CreateIfNotFound,
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IN OUT EFI_S3_BOOT_SCRIPT_POSITION *Position OPTIONAL,
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IN CONST CHAR8 *Label
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);
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/**
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Compare two positions in the boot script table and return their relative position.
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This function compares two positions in the boot script table and returns their relative positions. If
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Position1 is before Position2, then -1 is returned. If Position1 is equal to Position2,
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then 0 is returned. If Position1 is after Position2, then 1 is returned.
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@param[in] This A pointer to the EFI_S3_SAVE_STATE_PROTOCOL instance.
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@param[in] Position1 The positions in the boot script table to compare.
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@param[in] Position2 The positions in the boot script table to compare.
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@param[out] RelativePosition On return, points to the result of the comparison.
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@retval EFI_SUCCESS The operation succeeded.
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@retval EFI_INVALID_PARAMETER The Position1 or Position2 is not a valid position in the boot script table.
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@retval EFI_INVALID_PARAMETER The RelativePosition is NULL.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_S3_SAVE_STATE_COMPARE)(
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IN CONST EFI_S3_SAVE_STATE_PROTOCOL *This,
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IN EFI_S3_BOOT_SCRIPT_POSITION Position1,
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IN EFI_S3_BOOT_SCRIPT_POSITION Position2,
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OUT UINTN *RelativePosition
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);
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struct _EFI_S3_SAVE_STATE_PROTOCOL {
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EFI_S3_SAVE_STATE_WRITE Write;
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EFI_S3_SAVE_STATE_INSERT Insert;
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EFI_S3_SAVE_STATE_LABEL Label;
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EFI_S3_SAVE_STATE_COMPARE Compare;
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};
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extern EFI_GUID gEfiS3SaveStateProtocolGuid;
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#endif // __S3_SAVE_STATE_H__
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