[U-Boot] [PATCH v2 00/11] SPL support for RISC-V

[Anup Patel]

On Sun, Jul 28, 2019 at 9:27 PM Lukas Auer
<lukas.auer at aisec.fraunhofer.de> wrote:
>
> This series adds support for SPL to RISC-V U-Boot. Images can be booted
> via OpenSBI (FW_DYNAMIC firmware) or by directly jumping to them. In the
> former case, OpenSBI and U-Boot proper are bundled as a FIT image and
> made available to U-Boot SPL. Currently, only the QEMU board enables
> U-Boot SPL with a dedicated configuration. It uses RAM as SPL boot
> device.
>
> On many RISC-V CPUs, the device tree is provided to U-Boot by the
> first stage bootloader. This requires changes to U-Boot SPL (patches 1,
> 2 and 3), which modify the behavior on other boards as well.
>
> To test this series, OpenSBI has to be compiled first. The
> fw_dynamic.bin binary must be copied into the U-Boot root directory.
> Alternatively, the location of the binary can be specified with the
> OPENSBI environment variable. U-Boot can then be build as normal using
> the configuration qemu-riscv64_spl_defconfig for 64-bit builds or
> qemu-riscv32_spl_defconfig for 32-bit builds. The outputs from the build
> process are the U-Boot SPL binary (spl/u-boot-spl.bin) and the U-Boot
> FIT image (u-boot.itb) containing U-Boot proper and OpenSBI.
>
> U-Boot can be run in QEMU with the following command.
>
> qemu-system-riscv64 -nographic -machine virt -kernel spl/u-boot-spl \
>         -device loader,file=u-boot.itb,addr=0x80200000
>
> Changes in v2:
> - Rebase on master and format documentation as reStructuredText
>
> Lukas Auer (11):
>   fdtdec: make CONFIG_OF_PRIOR_STAGE available in SPL
>   Makefile: support building SPL FIT images without device trees
>   spl: fit: use U-Boot device tree when FIT image has no device tree
>   riscv: add run mode configuration for SPL
>   spl: support booting via RISC-V OpenSBI
>   riscv: add SPL support
>   riscv: support SPL stack and global data relocation
>   riscv: add a generic FIT generator script
>   riscv: set default FIT generator script and build target for SPL
>     builds
>   riscv: qemu: add SPL configuration
>   doc: update QEMU RISC-V documentation
>
>  Kconfig                                 |   4 +-
>  Makefile                                |   8 +-
>  arch/Kconfig                            |   6 ++
>  arch/riscv/Kconfig                      |  36 +++++++--
>  arch/riscv/cpu/ax25/Kconfig             |   6 +-
>  arch/riscv/cpu/cpu.c                    |   6 +-
>  arch/riscv/cpu/generic/Kconfig          |   5 +-
>  arch/riscv/cpu/start.S                  |  62 ++++++++++++++-
>  arch/riscv/cpu/u-boot-spl.lds           |  82 +++++++++++++++++++
>  arch/riscv/include/asm/encoding.h       |   2 +-
>  arch/riscv/include/asm/spl.h            |  31 ++++++++
>  arch/riscv/lib/Makefile                 |   8 +-
>  arch/riscv/lib/mkimage_fit_opensbi.sh   | 100 ++++++++++++++++++++++++
>  arch/riscv/lib/spl.c                    |  48 ++++++++++++
>  board/emulation/qemu-riscv/Kconfig      |  10 +++
>  board/emulation/qemu-riscv/MAINTAINERS  |   2 +
>  board/emulation/qemu-riscv/qemu-riscv.c |  17 ++++
>  common/image.c                          |   1 +
>  common/spl/Kconfig                      |  17 ++++
>  common/spl/Makefile                     |   1 +
>  common/spl/spl.c                        |   8 +-
>  common/spl/spl_fit.c                    |  37 ++++++---
>  common/spl/spl_opensbi.c                |  85 ++++++++++++++++++++
>  configs/qemu-riscv32_spl_defconfig      |  11 +++
>  configs/qemu-riscv64_spl_defconfig      |  12 +++
>  doc/board/emulation/qemu-riscv.rst      |  60 +++++++++++++-
>  include/configs/qemu-riscv.h            |  14 ++++
>  include/fdtdec.h                        |   2 +-
>  include/image.h                         |   1 +
>  include/opensbi.h                       |  40 ++++++++++
>  include/spl.h                           |   5 ++
>  lib/fdtdec.c                            |   6 +-
>  32 files changed, 691 insertions(+), 42 deletions(-)
>  create mode 100644 arch/riscv/cpu/u-boot-spl.lds
>  create mode 100644 arch/riscv/include/asm/spl.h
>  create mode 100755 arch/riscv/lib/mkimage_fit_opensbi.sh
>  create mode 100644 arch/riscv/lib/spl.c
>  create mode 100644 common/spl/spl_opensbi.c
>  create mode 100644 configs/qemu-riscv32_spl_defconfig
>  create mode 100644 configs/qemu-riscv64_spl_defconfig
>  create mode 100644 include/opensbi.h
>
> --
> 2.21.0
>

Hi Lukas,

Amazing work !!!
Very nice and clean...

I will try to play around with it on QEMU.

Thanks & Regards,
Anup