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![Simon Glass](/assets/img/avatar_default.png)
Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com>
155 lines
4.4 KiB
C
155 lines
4.4 KiB
C
/*
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* Copyright (C) 2013, Intel Corporation
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* Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
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*
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* SPDX-License-Identifier: Intel
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*/
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#ifndef __FSP_FFS_H__
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#define __FSP_FFS_H__
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/* Used to verify the integrity of the file */
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union __packed ffs_integrity {
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struct {
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/*
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* The IntegrityCheck.checksum.header field is an 8-bit
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* checksum of the file header. The State and
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* IntegrityCheck.checksum.file fields are assumed to be zero
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* and the checksum is calculated such that the entire header
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* sums to zero.
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*/
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u8 header;
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/*
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* If the FFS_ATTRIB_CHECKSUM (see definition below) bit of
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* the Attributes field is set to one, the
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* IntegrityCheck.checksum.file field is an 8-bit checksum of
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* the file data. If the FFS_ATTRIB_CHECKSUM bit of the
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* Attributes field is cleared to zero, the
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* IntegrityCheck.checksum.file field must be initialized with
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* a value of 0xAA. The IntegrityCheck.checksum.file field is
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* valid any time the EFI_FILE_DATA_VALID bit is set in the
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* State field.
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*/
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u8 file;
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} checksum;
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/* This is the full 16 bits of the IntegrityCheck field */
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u16 checksum16;
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};
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/*
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* Each file begins with the header that describe the
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* contents and state of the files.
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*/
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struct __packed ffs_file_header {
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/*
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* This GUID is the file name.
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* It is used to uniquely identify the file.
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*/
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struct efi_guid name;
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/* Used to verify the integrity of the file */
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union ffs_integrity integrity;
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/* Identifies the type of file */
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u8 type;
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/* Declares various file attribute bits */
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u8 attr;
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/* The length of the file in bytes, including the FFS header */
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u8 size[3];
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/*
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* Used to track the state of the file throughout the life of
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* the file from creation to deletion.
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*/
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u8 state;
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};
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struct __packed ffs_file_header2 {
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/*
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* This GUID is the file name. It is used to uniquely identify the file.
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* There may be only one instance of a file with the file name GUID of
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* Name in any given firmware volume, except if the file type is
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* EFI_FV_FILE_TYPE_FFS_PAD.
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*/
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struct efi_guid name;
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/* Used to verify the integrity of the file */
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union ffs_integrity integrity;
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/* Identifies the type of file */
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u8 type;
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/* Declares various file attribute bits */
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u8 attr;
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/*
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* The length of the file in bytes, including the FFS header.
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* The length of the file data is either
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* (size - sizeof(struct ffs_file_header)). This calculation means a
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* zero-length file has a size of 24 bytes, which is
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* sizeof(struct ffs_file_header). Size is not required to be a
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* multiple of 8 bytes. Given a file F, the next file header is located
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* at the next 8-byte aligned firmware volume offset following the last
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* byte of the file F.
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*/
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u8 size[3];
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/*
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* Used to track the state of the file throughout the life of
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* the file from creation to deletion.
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*/
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u8 state;
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/*
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* If FFS_ATTRIB_LARGE_FILE is set in attr, then ext_size exists
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* and size must be set to zero.
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* If FFS_ATTRIB_LARGE_FILE is not set then
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* struct ffs_file_header is used.
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*/
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u32 ext_size;
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};
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/*
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* Pseudo type. It is used as a wild card when retrieving sections.
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* The section type EFI_SECTION_ALL matches all section types.
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*/
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#define EFI_SECTION_ALL 0x00
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/* Encapsulation section Type values */
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#define EFI_SECTION_COMPRESSION 0x01
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#define EFI_SECTION_GUID_DEFINED 0x02
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#define EFI_SECTION_DISPOSABLE 0x03
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/* Leaf section Type values */
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#define EFI_SECTION_PE32 0x10
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#define EFI_SECTION_PIC 0x11
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#define EFI_SECTION_TE 0x12
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#define EFI_SECTION_DXE_DEPEX 0x13
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#define EFI_SECTION_VERSION 0x14
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#define EFI_SECTION_USER_INTERFACE 0x15
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#define EFI_SECTION_COMPATIBILITY16 0x16
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#define EFI_SECTION_FIRMWARE_VOLUME_IMAGE 0x17
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#define EFI_SECTION_FREEFORM_SUBTYPE_GUID 0x18
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#define EFI_SECTION_RAW 0x19
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#define EFI_SECTION_PEI_DEPEX 0x1B
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#define EFI_SECTION_SMM_DEPEX 0x1C
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/* Common section header */
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struct __packed raw_section {
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/*
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* A 24-bit unsigned integer that contains the total size of
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* the section in bytes, including the EFI_COMMON_SECTION_HEADER.
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*/
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u8 size[3];
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u8 type;
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};
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struct __packed raw_section2 {
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/*
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* A 24-bit unsigned integer that contains the total size of
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* the section in bytes, including the EFI_COMMON_SECTION_HEADER.
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*/
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u8 size[3];
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u8 type;
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/*
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* If size is 0xFFFFFF, then ext_size contains the size of
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* the section. If size is not equal to 0xFFFFFF, then this
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* field does not exist.
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*/
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u32 ext_size;
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};
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#endif
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