include/image-sparse.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright 2014 Broadcom Corporation.
   4  */
   5
   6 #include <compiler.h>
   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         void            (*mssg)(const char *str, char *response);
  28 };
  29
  30 static inline int is_sparse_image(void *buf)
  31 {
  32         sparse_header_t *s_header = (sparse_header_t *)buf;
  33
  34         if ((le32_to_cpu(s_header->magic) == SPARSE_HEADER_MAGIC) &&
  35             (le16_to_cpu(s_header->major_version) == 1))
  36                 return 1;
  37
  38         return 0;
  39 }
  40
  41 int write_sparse_image(struct sparse_storage *info, const char *part_name,
  42                        void *data, char *response);