include/bcb.h

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2020 Eugeniu Rosca <rosca.eugeniu@gmail.com>
   4  *
   5  * Android Bootloader Control Block Header
   6  */
   7
   8 #ifndef __BCB_H__
   9 #define __BCB_H__
  10
  11 #include <part.h>
  12
  13 enum bcb_field {
  14         BCB_FIELD_COMMAND,
  15         BCB_FIELD_STATUS,
  16         BCB_FIELD_RECOVERY,
  17         BCB_FIELD_STAGE
  18 };
  19
  20 #if IS_ENABLED(CONFIG_CMD_BCB)
  21
  22 int bcb_find_partition_and_load(const char *iface,
  23                                 int devnum, char *partp);
  24 int bcb_load(struct blk_desc *block_description,
  25              struct disk_partition *disk_partition);
  26 int bcb_set(enum bcb_field field, const char *value);
  27
  28 /**
  29  * bcb_get() - get the field value.
  30  * @field: field to get
  31  * @value_out: buffer to copy bcb field value to
  32  * @value_size: buffer size to avoid overflow in case
  33  *              value_out is smaller then the field value
  34  */
  35 int bcb_get(enum bcb_field field, char *value_out, size_t value_size);
  36
  37 int bcb_store(void);
  38 void bcb_reset(void);
  39
  40 #else
  41
  42 #include <linux/errno.h>
  43
  44 static inline int bcb_load(struct blk_desc *block_description,
  45                            struct disk_partition *disk_partition)
  46 {
  47         return -EOPNOTSUPP;
  48 }
  49
  50 static inline int bcb_find_partition_and_load(const char *iface,
  51                                               int devnum, char *partp)
  52 {
  53         return -EOPNOTSUPP;
  54 }
  55
  56 static inline int bcb_set(enum bcb_field field, const char *value)
  57 {
  58         return -EOPNOTSUPP;
  59 }
  60
  61 static inline int bcb_get(enum bcb_field field, char *value_out)
  62 {
  63         return -EOPNOTSUPP;
  64 }
  65
  66 static inline int bcb_store(void)
  67 {
  68         return -EOPNOTSUPP;
  69 }
  70
  71 static inline void bcb_reset(void)
  72 {
  73 }
  74 #endif
  75
  76 #endif /* __BCB_H__ */