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Before adding more files, move the bootstd docs into a new directory,
with an index.
Signed-off-by: Simon Glass <[email protected]>
Reviewed-by: Quentin Schulz <[email protected]>
Reviewed-by: Mattijs Korpershoek <[email protected]>
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Android boot flow is a bit different than a regular Linux distro.
Android relies on multiple partitions in order to boot.
A typical boot flow would be:
1. Parse the Bootloader Control Block (BCB, misc partition)
2. If BCB requested bootonce-bootloader, start fastboot and wait.
3. If BCB requested recovery or normal android, run the following:
3.a. Get slot (A/B) from BCB
3.b. Run AVB (Android Verified Boot) on boot partitions
3.c. Load boot and vendor_boot partitions
3.d. Load device-tree, ramdisk and boot
The AOSP documentation has more details at [1], [2], [3]
This has been implemented via complex boot scripts such as [4].
However, these boot script are neither very maintainable nor generic.
Moreover, DISTRO_DEFAULTS is being deprecated [5].
Add a generic Android bootflow implementation for bootstd.
For this initial version, only boot image v4 is supported.
[1] https://source.android.com/docs/core/architecture/bootloader
[2] https://source.android.com/docs/core/architecture/partitions
[3] https://source.android.com/docs/core/architecture/partitions/generic-boot
[4] https://source.denx.de/u-boot/u-boot/-/blob/master/include/configs/meson64_android.h
[5] https://lore.kernel.org/r/all/[email protected]/
Reviewed-by: Simon Glass <[email protected]>
Reviewed-by: Julien Masson <[email protected]>
Tested-by: Guillaume La Roque <[email protected]>
Signed-off-by: Mattijs Korpershoek <[email protected]>
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This fixes a few syntactic issues as well as typos and grammar.
Signed-off-by: Quentin Schulz <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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The "bootflow" command currently doesn't support scanning a single
partition. This is inconvenient in setups with multiple bootable
partitions within a single disk, but only one is desired.
Support scanning a single disk partition. Specifically, support the
syntax:
bootflow scan mmc1:4
which scans only mmc device 1, partition 4.
Signed-off-by: Nam Cao <[email protected]>
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%s/fdtaddr_addr_r/fdt_addr_r/
Signed-off-by: Heinrich Schuchardt <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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The existing TODOs are done, so remove them. Add another that came up
today.
Signed-off-by: Simon Glass <[email protected]>
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Standard boot has been in place for a while now. Quite a few problems
have been found and fixed. It seems like a good time to mark the
script-based approach as deprecated and encourage people to use standard
boot.
Update the DISTRO_DEFAULTS Kconfig to encourage people to move to
standard boot, which is able to boot Linux distributions automatically.
Add a short migration guide to make this easier.
Signed-off-by: Simon Glass <[email protected]>
Reviewed-by: Tom Rini <[email protected]>
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Prepare v2023.10-rc4
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The existing distro scripts check extlinux and scripts before EFI. Adjust
the default ordering to do the same, to avoid breaking existing flows.
Add some documentation, mentioning that this order will likely change in
future.
Signed-off-by: Simon Glass <[email protected]>
Reported-by: Da Xue <[email protected]>
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Some bootmeths support scanning a partition without a filesystem on it.
Add a flag to support this.
This will allow the ChromiumOS bootmeth to find kernel partition, which
are stored in a special format, without a filesystem.
Signed-off-by: Simon Glass <[email protected]>
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This name is a little confusing since it suggests that it sets up the
sibling block device. In fact it sets up a bootdev for it. Rename the
function to make this clearer.
Signed-off-by: Simon Glass <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Reviewed-by: Mattijs Korpershoek <[email protected]>
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We use the terms 'distro' to mean extlinux but they are not really the
same. 'Distro' could refer to any method of booting a distribution,
whereas extlinux is a particular method.
Also we sometimes use syslinux, but it is better to use the same term in
all cases.
Rename distro to syslinux and also update bootstd uses of syslinux to use
extlinux instead.
Signed-off-by: Simon Glass <[email protected]>
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These flags actually relate to the iterator, not the bootflow struct
itself. Rename them.
Signed-off-by: Simon Glass <[email protected]>
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We need to support a basic set of filesystems for booting to work in most
cases. Add these in via a new option, letting the board disable them
individually (for space reasons) if desired.
This enables the filesystem commands as well as the actual functionality,
even though bootstd is quite happy to use ext4 without the ext4 command.
Further work would be needed to disintangle this and reduce code size.
Add several other options as well, providing sensible defaults.
We cannot enable this by default, since it expands the size of many
boards quite a lot.
Signed-off-by: Simon Glass <[email protected]>
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Document the hunters and the new way that iteration works.
Signed-off-by: Simon Glass <[email protected]>
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We need extensions to be set up before we start trying to boot any of the
bootdevs. Add a new priority before all the others for tht sort of thing.
Also add a 'none' option, so that the first one is not 0.
While we are here, comment enum bootdev_prio_t fully and expand the test
for the 'bootdev hunt' command.
Signed-off-by: Simon Glass <[email protected]>
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Replace 'disto' with 'distro' since they are all functions about distro
booting.
Signed-off-by: Dario Binacchi <[email protected]>
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These typos were found while reading the docs.
Signed-off-by: Paul Barker <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Reviewed-by: Heinrich Schuchardt <[email protected]>
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Add some documentation updates, particularly about global bootmeths.
Signed-off-by: Simon Glass <[email protected]>
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Add a few links to documents about Verified Boot for Embedded (VBE).
These will be expanded as development proceeds.
Signed-off-by: Simon Glass <[email protected]>
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Add documentation for this feature, including the commands and full
devicetree bindings.
Signed-off-by: Simon Glass <[email protected]>
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