Re: [Buildroot] [PATCH v1 2/3] add board/versal

[Luca Ceresoli via buildroot <buildroot@buildroot.org>]

Hi Neal,

On Mon, 24 Oct 2022 08:22:15 -0600
Neal Frager <neal.frager@amd.com> wrote:

> --- /dev/null
> +++ b/board/versal/genimage.cfg
> @@ -0,0 +1,30 @@
> +image boot.vfat {
> +	vfat {
> +		files = {
> +			"boot.bin",
> +			"system.dtb",

system.dtb is stored in the FAT partition...

> --- /dev/null
> +++ b/board/versal/post-image.sh
> @@ -0,0 +1,35 @@
> +#!/bin/sh
> +
> +# By default U-Boot loads DTB from a file named "system.dtb", so
> +# let's use a symlink with that name that points to the *first*
> +# devicetree listed in the config.
> +
> +FIRST_DT=$(sed -nr \
> +               -e 's|^BR2_LINUX_KERNEL_INTREE_DTS_NAME="xilinx/([-_/[:alnum:]\\.]*).*"$|\1|p' \
> +               ${BR2_CONFIG})
> +
> +[ -z "${FIRST_DT}" ] || ln -fs ${FIRST_DT}.dtb ${BINARIES_DIR}/system.dtb
> +
> +BOARD_DIR="$(dirname $0)"
> +BOARD_NAME=$4
> +
> +mkdir -p "${BINARIES_DIR}"
> +cat <<-__HEADER_EOF > "${BINARIES_DIR}/bootgen.bif"
> +	the_ROM_image:
> +	{
> +	image {
> +		{ type=bootimage, file=${BINARIES_DIR}/${BOARD_NAME}_vpl_gen_fixed.pdi }
> +		{ type=bootloader, file=${BINARIES_DIR}/${BOARD_NAME}_plm.elf }
> +		{ core=psm, file=${BINARIES_DIR}/${BOARD_NAME}_psmfw.elf }
> +	}
> +	image {
> +		id = 0x1c000000, name=apu_subsystem 
> +		{ type=raw, load=0x00001000, file=${BINARIES_DIR}/system.dtb }

...and also in boot.bin. What's the reason for this? One copy is for
U-Boot and the other for the kernel?

-- 
Luca Ceresoli, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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