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

[Bin Meng]

Hi Lukas,

On Mon, Jul 22, 2019 at 2:00 AM 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 get
> feedback on this, I am therefore sending this series as RFC first.
>
> 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
>

Nice job done! It looks the SPL support was cleanly implemented.

I've tested this series, on qemu-riscv64 with UP and SMP, both work fine.
However when testing on qemu-riscv32, the U-Boot proper does not boot.
Please have a look.

Regards,
Bin