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/** @file
Provides services to retrieve values from Version 1 of a capsule's FMP Payload
Header. The FMP Payload Header structure is not defined in the library class.
Instead, services are provided to retrieve information from the FMP Payload
Header. If information is added to the FMP Payload Header, then new services
may be added to this library class to retrieve the new information.
Copyright (c) 2016, Microsoft Corporation. All rights reserved.<BR>
Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiDxe.h>
#include <Library/FmpPayloadHeaderLib.h>
///
/// Define FMP Payload Header structure here so it is not public
///
#pragma pack(1)
typedef struct {
UINT32 Signature;
UINT32 HeaderSize;
UINT32 FwVersion;
UINT32 LowestSupportedVersion;
} FMP_PAYLOAD_HEADER;
#pragma pack()
///
/// Identifier is used to make sure the data in the header is for this structure
/// and version. If the structure changes update the last digit.
///
#define FMP_PAYLOAD_HEADER_SIGNATURE SIGNATURE_32 ('M', 'S', 'S', '1')
/**
Returns the FMP Payload Header size in bytes.
@param[in] Header FMP Payload Header to evaluate
@param[in] FmpPayloadSize Size of FMP payload
@param[out] Size The size, in bytes, of the FMP Payload Header.
@retval EFI_SUCCESS The firmware version was returned.
@retval EFI_INVALID_PARAMETER Header is NULL.
@retval EFI_INVALID_PARAMETER Size is NULL.
@retval EFI_INVALID_PARAMETER Header is not a valid FMP Payload Header.
**/
EFI_STATUS
EFIAPI
GetFmpPayloadHeaderSize (
IN CONST VOID *Header,
IN CONST UINTN FmpPayloadSize,
OUT UINT32 *Size
)
{
FMP_PAYLOAD_HEADER *FmpPayloadHeader;
FmpPayloadHeader = NULL;
if (Header == NULL || Size == NULL) {
return EFI_INVALID_PARAMETER;
}
FmpPayloadHeader = (FMP_PAYLOAD_HEADER *)Header;
if ((UINTN)FmpPayloadHeader + sizeof (FMP_PAYLOAD_HEADER) < (UINTN)FmpPayloadHeader ||
(UINTN)FmpPayloadHeader + sizeof (FMP_PAYLOAD_HEADER) >= (UINTN)FmpPayloadHeader + FmpPayloadSize ||
FmpPayloadHeader->HeaderSize < sizeof (FMP_PAYLOAD_HEADER)) {
return EFI_INVALID_PARAMETER;
}
if (FmpPayloadHeader->Signature != FMP_PAYLOAD_HEADER_SIGNATURE) {
return EFI_INVALID_PARAMETER;
}
*Size = FmpPayloadHeader->HeaderSize;
return EFI_SUCCESS;
}
/**
Returns the version described in the FMP Payload Header.
@param[in] Header FMP Payload Header to evaluate
@param[in] FmpPayloadSize Size of FMP payload
@param[out] Version The firmware version described in the FMP Payload
Header.
@retval EFI_SUCCESS The firmware version was returned.
@retval EFI_INVALID_PARAMETER Header is NULL.
@retval EFI_INVALID_PARAMETER Version is NULL.
@retval EFI_INVALID_PARAMETER Header is not a valid FMP Payload Header.
**/
EFI_STATUS
EFIAPI
GetFmpPayloadHeaderVersion (
IN CONST VOID *Header,
IN CONST UINTN FmpPayloadSize,
OUT UINT32 *Version
)
{
FMP_PAYLOAD_HEADER *FmpPayloadHeader;
FmpPayloadHeader = NULL;
if (Header == NULL || Version == NULL) {
return EFI_INVALID_PARAMETER;
}
FmpPayloadHeader = (FMP_PAYLOAD_HEADER *)Header;
if ((UINTN)FmpPayloadHeader + sizeof (FMP_PAYLOAD_HEADER) < (UINTN)FmpPayloadHeader ||
(UINTN)FmpPayloadHeader + sizeof (FMP_PAYLOAD_HEADER) >= (UINTN)FmpPayloadHeader + FmpPayloadSize ||
FmpPayloadHeader->HeaderSize < sizeof (FMP_PAYLOAD_HEADER)) {
return EFI_INVALID_PARAMETER;
}
if (FmpPayloadHeader->Signature != FMP_PAYLOAD_HEADER_SIGNATURE) {
return EFI_INVALID_PARAMETER;
}
*Version = FmpPayloadHeader->FwVersion;
return EFI_SUCCESS;
}
/**
Returns the lowest supported version described in the FMP Payload Header.
@param[in] Header FMP Payload Header to evaluate
@param[in] FmpPayloadSize Size of FMP payload
@param[out] LowestSupportedVersion The lowest supported version described in
the FMP Payload Header.
@retval EFI_SUCCESS The lowest support version was returned.
@retval EFI_INVALID_PARAMETER Header is NULL.
@retval EFI_INVALID_PARAMETER LowestSupportedVersion is NULL.
@retval EFI_INVALID_PARAMETER Header is not a valid FMP Payload Header.
**/
EFI_STATUS
EFIAPI
GetFmpPayloadHeaderLowestSupportedVersion (
IN CONST VOID *Header,
IN CONST UINTN FmpPayloadSize,
OUT UINT32 *LowestSupportedVersion
)
{
FMP_PAYLOAD_HEADER *FmpPayloadHeader;
FmpPayloadHeader = NULL;
if (Header == NULL || LowestSupportedVersion == NULL) {
return EFI_INVALID_PARAMETER;
}
FmpPayloadHeader = (FMP_PAYLOAD_HEADER *)Header;
if ((UINTN)FmpPayloadHeader + sizeof (FMP_PAYLOAD_HEADER) < (UINTN)FmpPayloadHeader ||
(UINTN)FmpPayloadHeader + sizeof (FMP_PAYLOAD_HEADER) >= (UINTN)FmpPayloadHeader + FmpPayloadSize ||
FmpPayloadHeader->HeaderSize < sizeof (FMP_PAYLOAD_HEADER)) {
return EFI_INVALID_PARAMETER;
}
if (FmpPayloadHeader->Signature != FMP_PAYLOAD_HEADER_SIGNATURE) {
return EFI_INVALID_PARAMETER;
}
*LowestSupportedVersion = FmpPayloadHeader->LowestSupportedVersion;
return EFI_SUCCESS;
}
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