/*************************************************************************
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> File Name: rkboot_control.h
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> Author: jkand.huang
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> Mail: jkand.huang@rock-chips.com
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> Created Time: Wed 09 Jan 2019 02:57:43 PM CST
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************************************************************************/
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#ifndef _RKBOOT_CONTROL_H
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#define _RKBOOT_CONTROL_H
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#define AB_SLOT_NUM 2
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/* Magic for the A/B struct when serialized. */
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#define AVB_AB_MAGIC "\0AB0"
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#define AVB_AB_MAGIC_LEN 4
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/* Versioning for the on-disk A/B metadata - keep in sync with avbtool. */
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#define AVB_AB_MAJOR_VERSION 1
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#define AVB_AB_MINOR_VERSION 0
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/* Size of AvbABData struct. */
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#define AVB_AB_DATA_SIZE 32
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/* Maximum values for slot data */
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#define AVB_AB_MAX_PRIORITY 15
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#define AVB_AB_MAX_TRIES_REMAINING 7
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#define MISC_OFFSET 2048
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#define MISC_OFFSET_CMDLINE 4096
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#define MISC_PARTITION_NMAE "/dev/block/by-name/misc"
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#define CMDLINE_LENGTH 2048
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#define CMD_WIPE_USERDATA "cmd_wipe_userdata"
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/*
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struct rk_ab {
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unsigned char magic[AB_MAGIC_LEN];
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unsigned int version;
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int last_boot;
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int use_a;
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int use_b;
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int current_boot;
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unsigned char reserved[12];
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unsigned int crc32;
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};
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*/
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typedef struct AvbABSlotData {
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/* Slot priority. Valid values range from 0 to AVB_AB_MAX_PRIORITY,
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* both inclusive with 1 being the lowest and AVB_AB_MAX_PRIORITY
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* being the highest. The special value 0 is used to indicate the
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* slot is unbootable.
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*/
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unsigned char priority;//0,14,15
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/* Number of times left attempting to boot this slot ranging from 0
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* to AVB_AB_MAX_TRIES_REMAINING.
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*/
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unsigned char tries_remaining;//7--,成功启动，设为0
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/* Non-zero if this slot has booted successfully, 0 otherwise. */
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unsigned char successful_boot;//0,1
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/* Reserved for future use. */
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unsigned char reserved[1];
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}AvbABSlotData;
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/* Struct used for recording A/B metadata.
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*
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* When serialized, data is stored in network byte-order.
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*/
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typedef struct AvbABData {
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/* Magic number used for identification - see AVB_AB_MAGIC. */
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unsigned char magic[AVB_AB_MAGIC_LEN];
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/* Version of on-disk struct - see AVB_AB_{MAJOR,MINOR}_VERSION. */
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unsigned char version_major; //AVB_AB_MAJOR_VERSION
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unsigned char version_minor; //AVB_AB_MINOR_VERSION
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/* Padding to ensure |slots| field start eight bytes in. */
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unsigned char reserved1[2];
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/* Per-slot metadata. */
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AvbABSlotData slots[2];
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/* Reserved for future use. */
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unsigned char last_boot;//默认a，上一次成功启动slot的标志位，0-->a，1-->b
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unsigned char reserved2[11];
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/* CRC32 of all 28 bytes preceding this field. */
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unsigned int crc32;
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}AvbABData;
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int setSlotActivity();
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int setSlotSucceed();
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int readMisc(struct AvbABData *info);
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void display(struct AvbABData info);
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bool wipe_userdata(bool auto_reboot);
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#endif
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