src/lib/boot_device.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <boot_device.h>
   4
   5 void __weak boot_device_init(void)
   6 {
   7         /* Provide weak do-nothing init. */
   8 }
   9
  10 int __weak boot_device_wp_region(const struct region_device *rd,
  11                                  const enum bootdev_prot_type type)
  12 {
  13         /* return a failure, make aware WP is not implemented */
  14         return -1;
  15 }
  16
  17 static int boot_device_subregion(const struct region *sub,
  18                                 struct region_device *subrd,
  19                                 const struct region_device *parent)
  20 {
  21         if (parent == NULL)
  22                 return -1;
  23
  24         return rdev_chain(subrd, parent, region_offset(sub), region_sz(sub));
  25 }
  26
  27 int boot_device_ro_subregion(const struct region *sub,
  28                                 struct region_device *subrd)
  29 {
  30         /* Ensure boot device has been initialized at least once. */
  31         boot_device_init();
  32
  33         return boot_device_subregion(sub, subrd, boot_device_ro());
  34 }
  35
  36 int boot_device_rw_subregion(const struct region *sub,
  37                                 struct region_device *subrd)
  38 {
  39         /* Ensure boot device has been initialized at least once. */
  40         boot_device_init();
  41
  42         return boot_device_subregion(sub, subrd, boot_device_rw());
  43 }