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https://github.com/Telecominfraproject/OpenCellular.git
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0ca3830a7b
Change-Id: I37c811c52b8eb01d8e9b3888d55b2b58071711c5 BUG=chrome-os-partner:2022 TEST=none Review URL: http://codereview.chromium.org/6462032
126 lines
4.9 KiB
C
126 lines
4.9 KiB
C
/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Data structure definitions for firmware screen block (BMPBLOCK).
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*
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* The BmpBlock structure looks like:
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* +-----------------------------------------+
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* | BmpBlock Header |
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* +-----------------------------------------+
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* | ScreenLayout[0] | \
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* +-----------------------------------------+ |
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* | ScreenLayout[1] | |
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* +-----------------------------------------+ Localization[0]
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* | ... | |
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* +-----------------------------------------+ |
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* | ScreenLayout[number_of_screenlayouts-1] | /
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* +-----------------------------------------+
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* | ScreenLayout[0] | \
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* +-----------------------------------------+ Localization[1]
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* | ... | /
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* +-----------------------------------------+ ...
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* | ScreenLayout[0] | \
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* +-----------------------------------------+ Localization[
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* | ... | / number_of_localizations-1]
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* +-----------------------------------------+
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* | ImageInfo[0] |
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* +-----------------------------------------+
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* | Image Content |
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* +-----------------------------------------+
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* | ImageInfo[2] | ImageInfo is 4-byte aligned.
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* +-----------------------------------------+
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* | Image Content |
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* +-----------------------------------------+
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* | ... |
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* +-----------------------------------------+
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* | ImageInfo[number_fo_images-1] |
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* +-----------------------------------------+
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* | Image Content |
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* +-----------------------------------------+
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*
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*/
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#ifndef VBOOT_REFERENCE_BMPBLK_HEADER_H_
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#define VBOOT_REFERENCE_BMPBLK_HEADER_H_
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#include "sysincludes.h"
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__pragma(pack(push, 1)) /* Support packing for MSVC. */
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#define BMPBLOCK_SIGNATURE "$BMP"
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#define BMPBLOCK_SIGNATURE_SIZE (4)
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#define BMPBLOCK_MAJOR_VERSION (0x0001)
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#define BMPBLOCK_MINOR_VERSION (0x0000)
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#define MAX_IMAGE_IN_LAYOUT (8)
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/* BMPBLOCK header, describing how many screen layouts and image infos */
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typedef struct BmpBlockHeader {
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uint8_t signature[BMPBLOCK_SIGNATURE_SIZE]; /* BMPBLOCK_SIGNATURE $BMP */
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uint16_t major_version; /* see BMPBLOCK_MAJOR_VER */
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uint16_t minor_version; /* see BMPBLOCK_MINOR_VER */
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uint32_t number_of_localizations; /* Number of localizations */
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uint32_t number_of_screenlayouts; /* Number of screen layouts in each
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* localization */
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uint32_t number_of_imageinfos; /* Number of image infos */
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uint32_t reserved[3];
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} __attribute__((packed)) BmpBlockHeader;
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/* Screen layout, describing how to stack multiple images on screen */
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typedef struct ScreenLayout {
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struct {
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uint32_t x; /* X-offset of the image to be rendered */
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uint32_t y; /* Y-offset of the image to be rendered */
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uint32_t image_info_offset; /* Offset of image info from start of
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* BMPBLOCK. 0 means end of it. */
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} images[MAX_IMAGE_IN_LAYOUT]; /* Images contained in the screen. Will be
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* rendered from 0 to (number_of_images-1). */
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} __attribute__((packed)) ScreenLayout;
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/* Constants for screen index */
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typedef enum ScreenIndex {
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SCREEN_DEVELOPER_MODE = 0,
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SCREEN_RECOVERY_MODE,
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SCREEN_RECOVERY_NO_OS,
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SCREEN_RECOVERY_MISSING_OS,
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MAX_SCREEN_INDEX,
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} ScreenIndex;
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/* Image info, describing the information of the image block */
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typedef struct ImageInfo {
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uint32_t tag; /* Tag it as a special image, like HWID */
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uint32_t width; /* Width of the image */
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uint32_t height; /* Height of the image */
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uint32_t format; /* File format of the image */
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uint32_t compression; /* Compression method to the image file */
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uint32_t original_size; /* Size of the original uncompressed image */
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uint32_t compressed_size; /* Size of the compressed image */
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uint32_t reserved;
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/* NOTE: actual image content follows immediately */
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} __attribute__((packed)) ImageInfo;
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/* Constants for ImageInfo.tag */
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typedef enum ImageTag {
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TAG_NONE = 0,
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TAG_HWID,
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} ImageTag;
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/* Constants for ImageInfo.format */
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typedef enum ImageFormat {
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FORMAT_INVALID = 0,
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FORMAT_BMP,
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} ImageFormat;
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/* Constants for ImageInfo.compression */
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typedef enum Compression {
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COMPRESS_NONE = 0,
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COMPRESS_EFIv1, /* The x86 BIOS only supports this */
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COMPRESS_TBD, /* Only on ARM? */
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} Compression;
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__pragma(pack(pop)) /* Support packing for MSVC. */
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#endif /* VBOOT_REFERENCE_BMPBLK_HEADER_H_ */
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