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1 | /* | |
2 | * Copyright 2014 Broadcom Corporation. | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0+ | |
5 | */ | |
6 | ||
7 | #include <part.h> | |
8 | #include <sparse_format.h> | |
9 | ||
10 | #define ROUNDUP(x, y) (((x) + ((y) - 1)) & ~((y) - 1)) | |
11 | ||
12 | struct sparse_storage { | |
13 | lbaint_t blksz; | |
14 | lbaint_t start; | |
15 | lbaint_t size; | |
16 | void *priv; | |
17 | ||
18 | lbaint_t (*write)(struct sparse_storage *info, | |
19 | lbaint_t blk, | |
20 | lbaint_t blkcnt, | |
21 | const void *buffer); | |
22 | ||
23 | lbaint_t (*reserve)(struct sparse_storage *info, | |
24 | lbaint_t blk, | |
25 | lbaint_t blkcnt); | |
26 | }; | |
27 | ||
28 | static inline int is_sparse_image(void *buf) | |
29 | { | |
30 | sparse_header_t *s_header = (sparse_header_t *)buf; | |
31 | ||
32 | if ((le32_to_cpu(s_header->magic) == SPARSE_HEADER_MAGIC) && | |
33 | (le16_to_cpu(s_header->major_version) == 1)) | |
34 | return 1; | |
35 | ||
36 | return 0; | |
37 | } | |
38 | ||
39 | void write_sparse_image(struct sparse_storage *info, const char *part_name, | |
40 | void *data, unsigned sz); |