[PATCH 03/10] Add a command to find a load address

[Tom Rini]

On Sat, Nov 23, 2024 at 11:55:02AM -0800, Matthew Garrett wrote:

> From: Matthew Garrett <mgarrett at aurora.tech>
> 
> For systems with more complicated firmware, the firmware memory map may
> vary significantly based on a number of factors. This makes it difficult to
> pick a hardcoded load address. Add a command for finding an available
> address with sufficient room to load the provided path.
> 
> Signed-off-by: Matthew Garrett <mgarrett at aurora.tech>
> ---
> 
>  cmd/Kconfig     |  7 ++++
>  cmd/Makefile    |  1 +
>  cmd/addr_find.c | 87 +++++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 95 insertions(+)
>  create mode 100644 cmd/addr_find.c

This needs to be reworked on top of how lmb works today (which did
change post v2024.10) and looks a lot like what
arch/arm/mach-apple/board.c::board_late_init() was doing, even back in
2022. Do you end up using this functionality on more than one board /
family of boards? The easy path is likely to just follow what mach-apple
does, but the more broad path would be adding an option to configure the
key environment variables that are used as buffers and documented in
doc/develop/bootstd/overview.rst / doc/develop/distro.rst dynamically
rather than statically.

-- 
Tom
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