[Buildroot] [PATCH 2/4] boot/opensbi: introduce BR2_TARGET_OPENSBI_FW_FDT_PATH

Alistair Francis alistair23 at gmail.com
Tue Jun 15 07:56:00 UTC 2021


On Tue, Jun 15, 2021 at 10:18 AM Drew Fustini <drew at beagleboard.org> wrote:
>
> If u-boot CONFIG_OF_SEPARATE is defined [1], then the device tree will
> be built and placed in a u-boot.dtb file alongside u-boot.bin.
>
> When BR2_TARGET_UBOOT_FORMAT_DTB is enabled, buildroot will copy
> u-boot.dtb to $(BINARIES_DIR).
>
> This is useful for RISC-V platforms that want to build OpenSBI with an
> external DTB by using FW_FDT_PATH [2].
>
> [1] https://github.com/lentinj/u-boot/blob/master/doc/README.fdt-control
> [2] https://github.com/riscv/opensbi/blob/master/docs/firmware/fw.md
>
> Signed-off-by: Drew Fustini <drew at beagleboard.org>

Reviewed-by: Alistair Francis <alistair.francis at wdc.com>

Alistair

> ---
>  boot/opensbi/Config.in  | 10 ++++++++++
>  boot/opensbi/opensbi.mk |  3 +++
>  2 files changed, 13 insertions(+)
>
> diff --git a/boot/opensbi/Config.in b/boot/opensbi/Config.in
> index 632eeec88d77..bd4bd5ee6175 100644
> --- a/boot/opensbi/Config.in
> +++ b/boot/opensbi/Config.in
> @@ -109,4 +109,14 @@ config BR2_TARGET_OPENSBI_UBOOT_PAYLOAD
>         help
>           Build OpenSBI with the U-Boot as a Payload.
>
> +config BR2_TARGET_OPENSBI_FW_FDT_PATH
> +       bool "Include U-Boot DTB in OpenSBI Payload"
> +       depends on BR2_TARGET_OPENSBI_PLAT != ""
> +       depends on BR2_TARGET_UBOOT
> +       depends on BR2_TARGET_OPENSBI_UBOOT_PAYLOAD
> +       select BR2_TARGET_OPENSBI_INSTALL_PAYLOAD_IMG
> +       help
> +         Build OpenSBI with FW_FDT_PATH set to $(BINARIES_DIR)/u-boot.dtb
> +         Note that CONFIG_OF_SEPARATE must be set in the u-boot kconfig.
> +
>  endif
> diff --git a/boot/opensbi/opensbi.mk b/boot/opensbi/opensbi.mk
> index a525b8aea348..8e055633a82d 100644
> --- a/boot/opensbi/opensbi.mk
> +++ b/boot/opensbi/opensbi.mk
> @@ -46,6 +46,9 @@ endif
>  ifeq ($(BR2_TARGET_OPENSBI_UBOOT_PAYLOAD),y)
>  OPENSBI_DEPENDENCIES += uboot
>  OPENSBI_MAKE_ENV += FW_PAYLOAD_PATH="$(BINARIES_DIR)/u-boot.bin"
> +ifeq ($(BR2_TARGET_OPENSBI_FW_FDT_PATH),y)
> +OPENSBI_MAKE_ENV += FW_FDT_PATH="$(BINARIES_DIR)/u-boot.dtb"
> +endif
>  endif
>
>  define OPENSBI_BUILD_CMDS
> --
> 2.27.0
>
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot



More information about the buildroot mailing list