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131 lines
4.6 KiB
C
131 lines
4.6 KiB
C
/** @file
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Defines the APIs that enable PEI services to work with
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the underlying capsule capabilities of the platform.
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Copyright (c) 2015 - 2018, 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 introduced in PI Version 1.4.
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**/
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#ifndef _PEI_CAPSULE_PPI_H_
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#define _PEI_CAPSULE_PPI_H_
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///
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/// Global ID for the EFI_PEI_CAPSULE_PPI.
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///
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#define EFI_PEI_CAPSULE_PPI_GUID \
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{ \
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0x3acf33ee, 0xd892, 0x40f4, {0xa2, 0xfc, 0x38, 0x54, 0xd2, 0xe1, 0x32, 0x3d } \
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}
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///
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/// Forward declaration for the EFI_PEI_CAPSULE_PPI.
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///
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typedef struct _EFI_PEI_CAPSULE_PPI EFI_PEI_CAPSULE_PPI;
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///
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/// Keep name backwards compatible before PI Version 1.4
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///
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typedef struct _EFI_PEI_CAPSULE_PPI PEI_CAPSULE_PPI;
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/**
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Upon determining that there is a capsule to operate on, this service
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will use a series of EFI_CAPSULE_BLOCK_DESCRIPTOR entries to determine
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the current location of the various capsule fragments and coalesce them
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into a contiguous region of system memory.
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@param[in] PeiServices Pointer to the PEI Services Table.
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@param[out] MemoryBase Pointer to the base of a block of memory into which the buffers will be coalesced.
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On output, this variable will hold the base address
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of a coalesced capsule.
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@param[out] MemorySize Size of the memory region pointed to by MemoryBase.
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On output, this variable will contain the size of the
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coalesced capsule.
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@retval EFI_NOT_FOUND If: boot modecould not be determined, or the
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boot mode is not flash-update, or the capsule descriptors were not found.
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@retval EFI_BUFFER_TOO_SMALL The capsule could not be coalesced in the provided memory region.
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@retval EFI_SUCCESS There was no capsule, or the capsule was processed successfully.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_PEI_CAPSULE_COALESCE)(
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IN EFI_PEI_SERVICES **PeiServices,
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IN OUT VOID **MemoryBase,
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IN OUT UINTN *MemSize
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);
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/**
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Determine if a capsule needs to be processed.
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The means by which the presence of a capsule is determined is platform
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specific. For example, an implementation could be driven by the presence
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of a Capsule EFI Variable containing a list of EFI_CAPSULE_BLOCK_DESCRIPTOR
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entries. If present, return EFI_SUCCESS, otherwise return EFI_NOT_FOUND.
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@param[in] PeiServices Pointer to the PEI Services Table.
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@retval EFI_SUCCESS If a capsule is available.
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@retval EFI_NOT_FOUND No capsule detected.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_PEI_CAPSULE_CHECK_CAPSULE_UPDATE)(
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IN EFI_PEI_SERVICES **PeiServices
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);
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/**
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The Capsule PPI service that gets called after memory is available. The
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capsule coalesce function, which must be called first, returns a base
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address and size. Once the memory init PEIM has discovered memory,
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it should call this function and pass in the base address and size
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returned by the Coalesce() function. Then this function can create a
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capsule HOB and return.
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@par Notes:
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This function assumes it will not be called until the
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actual capsule update.
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@param[in] PeiServices Pointer to the PEI Services Table.
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@param[in] CapsuleBase Address returned by the capsule coalesce function.
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@param[in] CapsuleSize Value returned by the capsule coalesce function.
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@retval EFI_VOLUME_CORRUPTED CapsuleBase does not appear to point to a
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coalesced capsule.
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@retval EFI_SUCCESS Capsule HOB was created successfully.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_PEI_CAPSULE_CREATE_STATE)(
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IN EFI_PEI_SERVICES **PeiServices,
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IN VOID *CapsuleBase,
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IN UINTN CapsuleSize
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);
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///
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/// This PPI provides several services in PEI to work with the underlying
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/// capsule capabilities of the platform. These services include the ability
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/// for PEI to coalesce a capsule from a scattered set of memory locations
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/// into a contiguous space in memory, detect if a capsule is present for
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/// processing, and once memory is available, create a HOB for the capsule.
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///
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struct _EFI_PEI_CAPSULE_PPI {
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EFI_PEI_CAPSULE_COALESCE Coalesce;
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EFI_PEI_CAPSULE_CHECK_CAPSULE_UPDATE CheckCapsuleUpdate;
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EFI_PEI_CAPSULE_CREATE_STATE CreateState;
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};
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///
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/// Keep name backwards compatible before PI Version 1.4
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///
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extern EFI_GUID gPeiCapsulePpiGuid;
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extern EFI_GUID gEfiPeiCapsulePpiGuid;
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#endif // #ifndef _PEI_CAPSULE_PPI_H_
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