On 10/13/21 03:01, Simon Glass wrote:
With Ilias' efforts we have dropped OF_PRIOR_STAGE and OF_HOSTFILE so
there are only three ways to obtain a devicetree:
- OF_SEPARATE - the normal way, where the devicetree is built and
appended to U-Boot
- OF_EMBED - for development purposes, the devicetree is embedded in
the ELF file (also used for EFI)
- OF_BOARD - the board figures it out on its own
The last one is currently set up so that no devicetree is needed at all
in the U-Boot tree. Most boards do provide one, but some don't. Some
don't even provide instructions on how to boot on the board.
The problems with this approach are documented at [1].
In practice, OF_BOARD is not really distinct from OF_SEPARATE. Any board
can obtain its devicetree at runtime, even it is has a devicetree built
in U-Boot. This is because U-Boot may be a second-stage bootloader and its
caller may have a better idea about the hardware available in the machine.
This is the case with a few QEMU boards, for example.
So it makes no sense to have OF_BOARD as a 'choice'. It should be an
option, available with either OF_SEPARATE or OF_EMBED.
This series makes this change, adding various missing devicetree files
(and placeholders) to make the build work.
Why should we add dummy files with irrelevant content (see patch 06/16)
to make the build work? Why don't you fix the Makefile instead?
Best regards
Heinrich
It also provides a few qemu clean-ups discovered along the way.
This series is based on Ilias' two series for OF_HOSTFILE and
OF_PRIOR_STAGE removal.
It is available at u-boot-dm/ofb-working
[1]
https://patchwork.ozlabs.org/project/uboot/patch/20210919215111.3830278-3-...@chromium.org/
Simon Glass (16):
arm: qemu: Mention -nographic in the docs
arm: qemu: Explain how to extract the generate devicetree
riscv: qemu: Explain how to extract the generate devicetree
arm: qemu: Add a devicetree file for qemu_arm
arm: qemu: Add a devicetree file for qemu_arm64
riscv: qemu: Add devicetree files for qemu_riscv32/64
arm: rpi: Add a devicetree file for rpi_4
arm: vexpress: Add a devicetree file for juno
arm: xenguest_arm64: Add a fake devicetree file
arm: octeontx: Add a fake devicetree file
arm: xilinx_versal_virt: Add a devicetree file
arm: bcm7xxx: Add a devicetree file
arm: qemu-ppce500: Add a devicetree file
arm: highbank: Add a fake devicetree file
fdt: Make OF_BOARD a bool option
Drop CONFIG_BINMAN_STANDALONE_FDT
Makefile | 3 +-
arch/arm/dts/Makefile | 20 +-
arch/arm/dts/bcm2711-rpi-4-b.dts | 1958 ++++++++++++++++++++++++
arch/arm/dts/bcm7xxx.dts | 15 +
arch/arm/dts/highbank.dts | 14 +
arch/arm/dts/juno-r2.dts | 1038 +++++++++++++
arch/arm/dts/octeontx.dts | 14 +
arch/arm/dts/qemu-arm.dts | 402 +++++
arch/arm/dts/qemu-arm64.dts | 381 +++++
arch/arm/dts/xenguest-arm64.dts | 15 +
arch/arm/dts/xilinx-versal-virt.dts | 307 ++++
arch/powerpc/dts/Makefile | 1 +
arch/powerpc/dts/qemu-ppce500.dts | 264 ++++
arch/riscv/dts/Makefile | 2 +-
arch/riscv/dts/qemu-virt.dts | 8 -
arch/riscv/dts/qemu-virt32.dts | 217 +++
arch/riscv/dts/qemu-virt64.dts | 217 +++
configs/bcm7260_defconfig | 1 +
configs/bcm7445_defconfig | 1 +
configs/highbank_defconfig | 2 +-
configs/octeontx2_95xx_defconfig | 1 +
configs/octeontx2_96xx_defconfig | 1 +
configs/octeontx_81xx_defconfig | 1 +
configs/octeontx_83xx_defconfig | 1 +
configs/qemu-ppce500_defconfig | 2 +
configs/qemu-riscv32_defconfig | 1 +
configs/qemu-riscv32_smode_defconfig | 1 +
configs/qemu-riscv32_spl_defconfig | 4 +-
configs/qemu-riscv64_defconfig | 1 +
configs/qemu-riscv64_smode_defconfig | 1 +
configs/qemu-riscv64_spl_defconfig | 3 +-
configs/qemu_arm64_defconfig | 1 +
configs/qemu_arm_defconfig | 1 +
configs/rpi_4_32b_defconfig | 1 +
configs/rpi_4_defconfig | 1 +
configs/rpi_arm64_defconfig | 1 +
configs/vexpress_aemv8a_juno_defconfig | 1 +
configs/xenguest_arm64_defconfig | 1 +
configs/xilinx_versal_virt_defconfig | 1 +
doc/board/emulation/qemu-arm.rst | 19 +-
doc/board/emulation/qemu-riscv.rst | 12 +
dts/Kconfig | 27 +-
tools/binman/binman.rst | 20 -
43 files changed, 4922 insertions(+), 61 deletions(-)
create mode 100644 arch/arm/dts/bcm2711-rpi-4-b.dts
create mode 100644 arch/arm/dts/bcm7xxx.dts
create mode 100644 arch/arm/dts/highbank.dts
create mode 100644 arch/arm/dts/juno-r2.dts
create mode 100644 arch/arm/dts/octeontx.dts
create mode 100644 arch/arm/dts/qemu-arm.dts
create mode 100644 arch/arm/dts/qemu-arm64.dts
create mode 100644 arch/arm/dts/xenguest-arm64.dts
create mode 100644 arch/arm/dts/xilinx-versal-virt.dts
create mode 100644 arch/powerpc/dts/qemu-ppce500.dts
delete mode 100644 arch/riscv/dts/qemu-virt.dts
create mode 100644 arch/riscv/dts/qemu-virt32.dts
create mode 100644 arch/riscv/dts/qemu-virt64.dts
