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docs: More accurate diagram in bootloaders documentation for aboot

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The android bootloader is also split into two partitions, previously
that wasn't represented in the diagram.

Signed-off-by: Eric Curtin <ecurtin@redhat.com>
This commit is contained in:
Eric Curtin 2024-04-24 15:47:13 +01:00
parent c8c436e5db
commit 998a0ab57b
1 changed files with 10 additions and 10 deletions
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20
docs/bootloaders.md
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@ -41,19 +41,19 @@ We have two accompanying scripts that work with this type of environment:
[aboot-deploy](https://gitlab.com/CentOS/automotive/rpms/aboot-deploy) reads what the current slot is according to the `androidboot.slot_suffix=` karg, writes to the alternate boot_a or boot_b slot and sets a symlink either /ostree/root.a or /ostree/root.b so that it is known which userspace directory to boot into based on the `androidboot.slot_suffix=` karg, on subsequent boots.
```
+-----------------------------+ +---------------------------------+
| | +------------------+ | |
| firmware appends: | | | | |
+---------------------------------+
+-----------------------------+ +------------------+ | |
| bootloader_a appends karg: | | | | |
| +--->+ boot_a partition +--->+ |
| androidboot.slot_suffix=_a | | | | /ostree/root.a |
| | +------------------+ | |
| or | | system_a partition |
| | +------------------+ | |
| androidboot.slot_suffix=_b | | | | /ostree/root.b |
+-----------------------------+ +------------------+ | |
| system partition |
+-----------------------------+ +------------------+ | |
| bootloader_b appends karg: | | | | /ostree/root.b |
| +--->+ boot_b partition +--->+ |
| to cmdline | | | | |
| | +------------------+ | |
+-----------------------------+ +---------------------------------+
| androidboot.slot_suffix=_b | | | | |
+-----------------------------+ +------------------+ | |
+---------------------------------+
```
## GRUB and os-prober