include/image-sparse.h

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