Administration/pmbootstrap-meow
2
0
Fork 0
forked from Mirror/pmbootstrap
Code Pull requests Activity Actions

add "fastboot-bootpart" flasher to flash split images with fastboot (!1871)

Browse source 
asus-me176c has a Fastboot interface that can be used for flashing,
but in postmarketOS we do not use Android boot images for it.
This is because is it not very practical - the boot partition is
quite small and there is a (custom) EFI bootloader that can boot
directly from any other FAT32 partition.

At the moment the installation process is manual:
  1. pmbootstrap install --split to have separated boot (FAT32)
     and rootfs images
  2. pmbootstrap export
  3. Flash boot and rootfs images manually using Fastboot

The "fastboot-bootpart" flasher implements that process in a more
convenient way. When a device uses the "fastboot-bootpart" flasher:

  - We generate --split images on "pmbootstrap install" by default.
    (This can be disabled using --no-split instead.)

  - pmbootstrap flasher flash_kernel flashes the raw boot partition
    (not an Android boot image) using Fastboot, just like the rootfs.

There are some limitations that could be improved in the future:

  - "fastboot-bootpart" is not offered in the device wizard.
    I think it is special enough that no-one will be starting with it,
    and the difference to normal "fastboot" might be confusing.

  - Support "pmbootstrap flasher boot". asus-me176c does not support
    "fastboot boot" properly, but theoretically we could still generate
    Android boot images to use when booting an image directly.

  - At the moment the boot partition image is not regenerated when
    using "pmbootstrap flasher flash_kernel" (unlike when using Android
    boot images). "pmbootstrap install" needs to be run manually first.
This commit is contained in:
Minecrell 2020-02-04 11:30:28 +01:00 • committed by Alexey Min
parent ba1e39f48e
commit 87dd071b32
No known key found for this signature in database
GPG key ID: 0B19D2A65870B448
6 changed files with 77 additions and 29 deletions
Download patch file Download diff file Expand all files Collapse all files

4
pmb/flasher/variables.py
View file

@ -23,7 +23,7 @@ def variables(args, flavor, method):
if "cmdline" in args and args.cmdline:
_cmdline = args.cmdline
if method == "fastboot":
if method.startswith("fastboot"):
_partition_kernel = args.deviceinfo["flash_fastboot_partition_kernel"] or "boot"
_partition_system = args.deviceinfo["flash_fastboot_partition_system"] or "system"
else:
@ -38,6 +38,8 @@ def variables(args, flavor, method):
vars = {
"$BOOT": "/mnt/rootfs_" + args.device + "/boot",
"$FLAVOR": flavor if flavor is not None else "",
"$IMAGE_SPLIT_BOOT": "/home/pmos/rootfs/" + args.device + "-boot.img",
"$IMAGE_SPLIT_ROOT": "/home/pmos/rootfs/" + args.device + "-root.img",
"$IMAGE": "/home/pmos/rootfs/" + args.device + ".img",
"$KERNEL_CMDLINE": _cmdline,
"$PARTITION_KERNEL": _partition_kernel,