[PATCH v4 1/4] bootstd: Enable BOOTSTD_DEFAULTS by default
sjg at chromium.org
Thu Mar 30 11:17:22 CEST 2023
On Wed, 29 Mar 2023 at 20:55, Nicolas Ferre <nicolas.ferre at microchip.com> wrote:
> Hi Simon,
> On 29/03/2023 at 09:16, Simon Glass wrote:
> > This is needed to enable the boot command used to start standard boot.
> > Enable it by default. This brings in quite a few features, mostly in
> > common with DISTRO_DEFAULTS
> > Disable this option for boards which don't have enough space.
> What is the identified minimal space for benefiting from this feature?
Well some boards have a limit on the size of U-Boot. The defaults
enables lots of things, including ext and fat filesystems, partition
types, booti/z for ARM, etc.
I have not locked at what a minimal board requires. But if you know
what you are doing, you could drop BOOT_DEFAULTS and BOOTSTD_DEFAULTS
or DISTRO_DEFAULTS and manually enable just what you need.
> > Disable CONFIG_ENV_VARS_UBOOT_CONFIG for some Xilinx boards which have
> > a very small environment. Disable BOOTSTD_DEFAULTS for smartweb since
> > it is too close to its limit.
> I see that a few Microchip boards are in this case too and even if
> sama5d27 som1 ek might be impacted, I would like to double check for the
> other sama5d2 boards.
OK, sure. The really big thing is booting EFI images -
CONFIG_EFI_LOADER. It adds over 100KB I think.
More information about the U-Boot