include/image-sparse.h

   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);