89 lines
2.9 KiB
C
89 lines
2.9 KiB
C
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/*
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* Copyright (c) 2016, Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __VERSION_HEADER_H__
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#define __VERSION_HEADER_H__
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#include <stdint.h>
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/**
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* Define the content of a 48-bytes binary version header.
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*
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* The binary version header allows to uniquely identify the binary used. Note:
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* - a device may include more than one binary, each having its own binary
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* version header.
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* - the position of this struct is usually defined in the linker script and
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* its content is overwritten after the build (in a special post-build script).
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* It therefore doesn't need to be initialized at compile-time (expected magic
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* and version), yet can be used in the code at runtime.
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*
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* Major, Minor, Patch are the following the usual definition, e.g. 1.0.0
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*/
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struct version_header {
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/** Always equal to $B!N */
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uint8_t magic[4];
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/** Header format version */
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uint8_t version;
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uint8_t major;
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uint8_t minor;
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uint8_t patch;
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/**
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* Human-friendly version string, free format (not NULL terminated)
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* Advised format is: PPPPXXXXXX-YYWWTBBBB
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* - PPPP : product code
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* - XXXXXX: binary info. Usually contains information such as the
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* binary type (bootloader, application), build variant (unit tests,
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* debug, release), release/branch name
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* - YY : year last 2 digits
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* - WW : work week number
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* - T : build type, e.g. [W]eekly, [L]atest, [R]elease, [P]roduction,
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* [F]actory, [C]ustom
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* - BBBB : build number, left padded with zeros
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* Examples:
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* - A101BOOT01-1503W0234
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* - CCCKAPP123-1502R0013
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*/
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char version_string[20];
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/**
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* Micro-SHA1 (first 4 bytes of the SHA1) of the binary payload excluding
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* this header. It allows to uniquely identify the exact binary used.
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* In the case the header is located in the middle of the payload, the
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* SHA1 has to be computed from two disjoint buffers.
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*/
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uint8_t hash[4];
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/** Position of the payload start relative to the address of this structure */
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int32_t offset;
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/** Filled with zeros, can be eventually used for 64 bits support */
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uint8_t reserved_1[4];
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/** Size of the payload in bytes, including this header */
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uint32_t size;
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/** Filled with zeros, can be eventually used for 64 bits support */
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uint8_t reserved_2[4];
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} __packed;
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/** The global version header struct */
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extern struct version_header version_header;
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#endif /* __VERSION_HEADER_H__ */
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