Basic Commands:

1. --kernel KERNEL
   Path to the kernel image file.
   Specifies the kernel to be included in the boot image.

2. --ramdisk RAMDISK
   Path to the ramdisk file.
   Defines the ramdisk image to include in the boot image, containing essential system files for booting.

3. --second SECOND
   Path to the second bootloader (optional).
   Some devices use a second bootloader; specify the path if required.

4. --dtb DTB
   Path to the device tree binary (DTB).
   Contains the hardware configuration necessary for the kernel.

5. --cmdline CMDLINE
   Kernel command line arguments.
   Arguments to pass to the kernel during boot (e.g., configuring hardware, enabling debugging).

6. --vendor_cmdline VENDOR_CMDLINE
   Vendor-specific kernel command line arguments.
   Allows setting vendor-specific arguments for the vendor boot image.

Memory and Offset Configuration:

7. --base BASE
   Base address for loading components in memory.
   Defines the base address for the kernel, ramdisk, and other components.

8. --kernel_offset KERNEL_OFFSET
   Offset for the kernel in memory.
   Specifies where in memory the kernel should be loaded.

9. --ramdisk_offset RAMDISK_OFFSET
   Offset for the ramdisk in memory.
   Defines where the ramdisk will be loaded in memory.

10. --second_offset SECOND_OFFSET
    Offset for the second bootloader.
    Specifies where to load the second bootloader in memory.

11. --dtb_offset DTB_OFFSET
    Offset for the device tree.
    Defines the memory location for the device tree blob.

Image Customization and Output:

12. --os_version OS_VERSION
    Operating system version.
    Defines the OS version for the boot image.

13. --os_patch_level OS_PATCH_LEVEL
    Operating system patch level.
    Sets the patch level for the operating system.

14. --tags_offset TAGS_OFFSET
    Tags offset.
    Defines the offset for kernel tags, usually for passing bootloader information.

15. --board BOARD
    Board name.
    Specifies the board name (e.g., "obiwan") to customize the boot image.

16. --pagesize {2048,4096,8192,16384}
    Page size for the boot image.
    Sets the page size, important for memory alignment during boot.

17. --output OUTPUT
    Output file name.
    Specifies the name of the boot image file to be generated.

Vendor-Specific Options:

18. --vendor_boot VENDOR_BOOT
    Vendor boot image output file.
    Creates a vendor boot image containing proprietary or customized components.

19. --vendor_ramdisk VENDOR_RAMDISK
    Path to the vendor ramdisk file.
    Specifies a separate ramdisk for the vendor’s boot components.

20. --vendor_bootconfig VENDOR_BOOTCONFIG
    Path to the vendor boot configuration file.
    Allows specifying a custom configuration for the vendor’s boot image.

Deprecated GKI 2.0 Signing Options:

21. --gki_signing_algorithm GKI_SIGNING_ALGORITHM
    Signing algorithm for GKI boot image.
    Defines which signing algorithm to use for GKI-based boot images (e.g., RSA).

22. --gki_signing_key GKI_SIGNING_KEY
    Path to RSA private key.
    Specifies the path to the private key used for signing the boot image.

23. --gki_signing_avbtool_path GKI_SIGNING_AVBTOOL_PATH
    Path to avbtool for signing.
    Path to the avbtool used to sign the boot image, ensuring integrity.

Vendor Boot Version 4 Options:

24. --ramdisk_type {none,platform,recovery,dlkm}
    Type of vendor ramdisk.
    Defines the type of ramdisk, such as platform, recovery, or dynamic load kernel mode (DLKM).

25. --ramdisk_name NAME
    Name of the ramdisk.
    Assigns a name to the ramdisk for identification in vendor-specific boot images.

26. --board_id {0..15} NUMBER
    Board ID for the vendor image.
    Specifies a board ID for identifying different device variants.

27. --vendor_ramdisk_fragment VENDOR_RAMDISK_FILE
    Path to vendor ramdisk fragment.
    Allows you to add multiple fragments to the vendor ramdisk, creating a larger image if necessary.

Miscellaneous:

28. --id
    Prints the image ID.
    Outputs the ID of the boot image for reference.

29. --header_version HEADER_VERSION
    Boot image header version.
    Sets the version of the boot image header.

Example Command:

Here is an example of how to use the mkbootimg.py command with some common options:

python mkbootimg.py --kernel /path/to/kernel --ramdisk /path/to/ramdisk --dtb /path/to/dtb --cmdline "androidboot.mode=normal" --base 0x10000000 --output /path/to/output.img

This would create a boot image with a kernel, ramdisk, and device tree, set to load from a specified base address, and output to output.img.