diff options
Diffstat (limited to 'bootloader_message')
-rw-r--r-- | bootloader_message/include/bootloader_message/bootloader_message.h | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/bootloader_message/include/bootloader_message/bootloader_message.h b/bootloader_message/include/bootloader_message/bootloader_message.h index 9a482d423..e4cf09b22 100644 --- a/bootloader_message/include/bootloader_message/bootloader_message.h +++ b/bootloader_message/include/bootloader_message/bootloader_message.h @@ -83,108 +83,6 @@ struct bootloader_message { char reserved[1184]; }; -/** - * We must be cautious when changing the bootloader_message struct size, - * because A/B-specific fields may end up with different offsets. - */ -#if (__STDC_VERSION__ >= 201112L) || defined(__cplusplus) -static_assert(sizeof(struct bootloader_message) == 2048, - "struct bootloader_message size changes, which may break A/B devices"); -#endif - -/** - * The A/B-specific bootloader message structure (4-KiB). - * - * We separate A/B boot control metadata from the regular bootloader - * message struct and keep it here. Everything that's A/B-specific - * stays after struct bootloader_message, which should be managed by - * the A/B-bootloader or boot control HAL. - * - * The slot_suffix field is used for A/B implementations where the - * bootloader does not set the androidboot.ro.boot.slot_suffix kernel - * commandline parameter. This is used by fs_mgr to mount /system and - * other partitions with the slotselect flag set in fstab. A/B - * implementations are free to use all 32 bytes and may store private - * data past the first NUL-byte in this field. It is encouraged, but - * not mandatory, to use 'struct bootloader_control' described below. - * - * The update_channel field is used to store the Omaha update channel - * if update_engine is compiled with Omaha support. - */ -struct bootloader_message_ab { - struct bootloader_message message; - char slot_suffix[32]; - char update_channel[128]; - - // Round up the entire struct to 4096-byte. - char reserved[1888]; -}; - -/** - * Be cautious about the struct size change, in case we put anything post - * bootloader_message_ab struct (b/29159185). - */ -#if (__STDC_VERSION__ >= 201112L) || defined(__cplusplus) -static_assert(sizeof(struct bootloader_message_ab) == 4096, - "struct bootloader_message_ab size changes"); -#endif - -#define BOOT_CTRL_MAGIC 0x42414342 /* Bootloader Control AB */ -#define BOOT_CTRL_VERSION 1 - -struct slot_metadata { - // Slot priority with 15 meaning highest priority, 1 lowest - // priority and 0 the slot is unbootable. - uint8_t priority : 4; - // Number of times left attempting to boot this slot. - uint8_t tries_remaining : 3; - // 1 if this slot has booted successfully, 0 otherwise. - uint8_t successful_boot : 1; - // 1 if this slot is corrupted from a dm-verity corruption, 0 - // otherwise. - uint8_t verity_corrupted : 1; - // Reserved for further use. - uint8_t reserved : 7; -} __attribute__((packed)); - -/* Bootloader Control AB - * - * This struct can be used to manage A/B metadata. It is designed to - * be put in the 'slot_suffix' field of the 'bootloader_message' - * structure described above. It is encouraged to use the - * 'bootloader_control' structure to store the A/B metadata, but not - * mandatory. - */ -struct bootloader_control { - // NUL terminated active slot suffix. - char slot_suffix[4]; - // Bootloader Control AB magic number (see BOOT_CTRL_MAGIC). - uint32_t magic; - // Version of struct being used (see BOOT_CTRL_VERSION). - uint8_t version; - // Number of slots being managed. - uint8_t nb_slot : 3; - // Number of times left attempting to boot recovery. - uint8_t recovery_tries_remaining : 3; - // Status of any pending snapshot merge of dynamic partitions. - uint8_t merge_status : 3; - // Ensure 4-bytes alignment for slot_info field. - uint8_t reserved0[1]; - // Per-slot information. Up to 4 slots. - struct slot_metadata slot_info[4]; - // Reserved for further use. - uint8_t reserved1[8]; - // CRC32 of all 28 bytes preceding this field (little endian - // format). - uint32_t crc32_le; -} __attribute__((packed)); - -#if (__STDC_VERSION__ >= 201112L) || defined(__cplusplus) -static_assert(sizeof(struct bootloader_control) == - sizeof(((struct bootloader_message_ab *)0)->slot_suffix), - "struct bootloader_control has wrong size"); -#endif - // Holds Virtual A/B merge status information. Current version is 1. New fields // must be added to the end. struct misc_virtual_ab_message { |