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- /*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- typedef struct sparse_header {
- uint32_t magic; /* 0xed26ff3a */
- uint16_t major_version; /* (0x1) - reject images with higher major versions */
- uint16_t minor_version; /* (0x0) - allow images with higer minor versions */
- uint16_t file_hdr_sz; /* 28 bytes for first revision of the file format */
- uint16_t chunk_hdr_sz; /* 12 bytes for first revision of the file format */
- uint32_t blk_sz; /* block size in bytes, must be a multiple of 4 (4096) */
- uint32_t total_blks; /* total blocks in the non-sparse output image */
- uint32_t total_chunks; /* total chunks in the sparse input image */
- uint32_t image_checksum; /* CRC32 checksum of the original data, counting "don't care" */
- /* as 0. Standard 802.3 polynomial, use a Public Domain */
- /* table implementation */
- } sparse_header_t;
- #define SPARSE_HEADER_MAGIC 0xed26ff3a
- #define CHUNK_TYPE_RAW 0xCAC1
- #define CHUNK_TYPE_FILL 0xCAC2
- #define CHUNK_TYPE_DONT_CARE 0xCAC3
- #define CHUNK_TYPE_CRC 0xCAC4
- typedef struct chunk_header {
- uint16_t chunk_type; /* 0xCAC1 -> raw; 0xCAC2 -> fill; 0xCAC3 -> don't care */
- uint16_t reserved1;
- uint32_t chunk_sz; /* in blocks in output image */
- uint32_t total_sz; /* in bytes of chunk input file including chunk header and data */
- } chunk_header_t;
- /* Following a Raw or Fill chunk is data. For a Raw chunk, it's the data in chunk_sz * blk_sz.
- * For a Fill chunk, it's 4 bytes of the fill data.
- */
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