On Sat, Jun 12, 2021 at 09:13:31AM -0400, Tom Rini wrote:
> To make use of the "generic distro boot" support in U-Boot, an
> extlinux.conf file needs to be generated and reside in the extlinux
> directory. The extlinux.conf file will be parsed by U-Boot and the
> "append" line will be evaluated and expanded and used entirely as the
> bootargs passed to the kernel. Our generated extlinux.conf states
> that the kernel image and device trees live one level up (so the root
> directory) from it, so populate that location with our kernel and device
> trees.
>
> Signed-off-by: Tom Rini <tr...@konsulko.com>
Reviewed-by: Denys Dmytriyenko <de...@konsulko.com>
> ---
> Changes in v2:
> - Elaborate on how this feature works in the commit message.
> ---
> conf/machine/include/ti33x.inc | 11 ++++++++++-
> 1 file changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/conf/machine/include/ti33x.inc b/conf/machine/include/ti33x.inc
> index 6dfda754e9dd..35e057d57497 100644
> --- a/conf/machine/include/ti33x.inc
> +++ b/conf/machine/include/ti33x.inc
> @@ -43,6 +43,15 @@ UBOOT_MACHINE = "am335x_evm_config"
> UBOOT_ENTRYPOINT = "0x80008000"
> UBOOT_LOADADDRESS = "0x80008000"
>
> +# Generate an extlinux.conf file
> +UBOOT_EXTLINUX = "1"
> +UBOOT_EXTLINUX_ROOT = "root=PARTUUID=${uuid}"
> +UBOOT_EXTLINUX_BOOT_FILES = " \
> + extlinux.conf;extlinux/extlinux.conf \
> + ${KERNEL_IMAGETYPE} \
> + ${KERNEL_DEVICETREE} \
> +"
> +
> SPL_BINARY = "MLO"
> UBOOT_SUFFIX = "img"
>
> @@ -61,5 +70,5 @@ TI_PDK_LIMIT_BOARDS = "evmAM335x icev2AM335x iceAMIC110
> bbbAM335x skAM335x"
>
> IMAGE_FSTYPES += "tar.xz wic.xz"
> WKS_FILE ?= "sdimage-2part.wks"
> -IMAGE_BOOT_FILES ?= "${SPL_BINARY} u-boot.${UBOOT_SUFFIX}"
> +IMAGE_BOOT_FILES ?= "${SPL_BINARY} u-boot.${UBOOT_SUFFIX}
> ${UBOOT_EXTLINUX_BOOT_FILES}"
> do_image_wic[depends] += "virtual/bootloader:do_deploy"
> --
> 2.17.1
>
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