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

[Auer, Lukas]

Hi Bin,

On Tue, 2019-07-23 at 16:32 +0800, Bin Meng wrote:
> 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.
> 

Thank you very much! :)

> 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

Thank you for reviewing and testing the series!

Do you mean that the U-Boot prompt does not appear? Testing the series
on qemu-riscv32, I get the U-Boot prompt from U-Boot proper. I did not
try to boot Linux on qemu-riscv32, however. I will try that tomorrow.

Thanks,
Lukas