diff options
Diffstat (limited to 'bootloader.h')
-rw-r--r-- | bootloader.h | 75 |
1 files changed, 73 insertions, 2 deletions
diff --git a/bootloader.h b/bootloader.h index 9c84a1cf9..88d54a5cb 100644 --- a/bootloader.h +++ b/bootloader.h @@ -14,5 +14,76 @@ * limitations under the License. */ -// TODO: Remove this file once we remove all places that include this file. -#include "bootloader_message/include/bootloader_message/bootloader_message.h" +#ifndef _RECOVERY_BOOTLOADER_H +#define _RECOVERY_BOOTLOADER_H + +#include <stddef.h> + +// Spaces used by misc partition are as below: +// 0 - 2K Bootloader Message +// 2K - 16K Used by Vendor's bootloader +// 16K - 64K Used by uncrypt and recovery to store wipe_package for A/B devices +// Note that these offsets are admitted by bootloader,recovery and uncrypt, so they +// are not configurable without changing all of them. +static const size_t BOOTLOADER_MESSAGE_OFFSET_IN_MISC = 0; +static const size_t WIPE_PACKAGE_OFFSET_IN_MISC = 16 * 1024; + +/* Bootloader Message + * + * This structure describes the content of a block in flash + * that is used for recovery and the bootloader to talk to + * each other. + * + * The command field is updated by linux when it wants to + * reboot into recovery or to update radio or bootloader firmware. + * It is also updated by the bootloader when firmware update + * is complete (to boot into recovery for any final cleanup) + * + * The status field is written by the bootloader after the + * completion of an "update-radio" or "update-hboot" command. + * + * The recovery field is only written by linux and used + * for the system to send a message to recovery or the + * other way around. + * + * The stage field is written by packages which restart themselves + * multiple times, so that the UI can reflect which invocation of the + * package it is. If the value is of the format "#/#" (eg, "1/3"), + * the UI will add a simple indicator of that status. + * + * 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. + */ +struct bootloader_message { + char command[32]; + char status[32]; + char recovery[768]; + + // The 'recovery' field used to be 1024 bytes. It has only ever + // been used to store the recovery command line, so 768 bytes + // should be plenty. We carve off the last 256 bytes to store the + // stage string (for multistage packages) and possible future + // expansion. + char stage[32]; + char slot_suffix[32]; + char reserved[192]; +}; + +/* Read and write the bootloader command from the "misc" partition. + * These return zero on success. + */ +int get_bootloader_message(struct bootloader_message *out); +int set_bootloader_message(const struct bootloader_message *in); + +#ifdef __cplusplus + +#include <string> + +bool read_wipe_package(size_t size, std::string* out); +#endif + +#endif |