diff options
Diffstat (limited to 'roms/edk2/FmpDevicePkg/Library/FmpPayloadHeaderLibV1/FmpPayloadHeaderLib.c')
| -rw-r--r-- | roms/edk2/FmpDevicePkg/Library/FmpPayloadHeaderLibV1/FmpPayloadHeaderLib.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/roms/edk2/FmpDevicePkg/Library/FmpPayloadHeaderLibV1/FmpPayloadHeaderLib.c b/roms/edk2/FmpDevicePkg/Library/FmpPayloadHeaderLibV1/FmpPayloadHeaderLib.c new file mode 100644 index 000000000..119679cd9 --- /dev/null +++ b/roms/edk2/FmpDevicePkg/Library/FmpPayloadHeaderLibV1/FmpPayloadHeaderLib.c @@ -0,0 +1,171 @@ +/** @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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