[OpenWrt-Devel] OpenWrt port for RISC-V

[Alex Guo]

Hi Zoltan,

Great to see you here, let's work together.

I had moved glibc from 2.26 to 2.27 in my port.

About the kernel version, my plan is create patches-4.16 based on 
patches-4.14 (may skip some unrelated patches first), then start all the 
kernel work on 4.16.y

Also, if we want to run WRT on hifive-u, we may need merge patches from 
riscv/riscv-linux, but I think qemu should be first priority.

Please let me know your new process or your git repo or anything I can 
help to review/test your port.

best,

Alex Guo

On 05/03/2018 12:59 AM, Zoltan HERPAI wrote:
> Hi Alex,
>
> On Thu, 3 May 2018, Alex Guo wrote:
>
>> Hi,
>>
>> I'm Alex from Jinglue Semi. Shanghai.
>>
>> I did some work on porting OpenWrt to RISC-V. Right now it based on 
>>  OpenWrt master branch and use upstream toochain (gcc/7.3.0, Binutils 
>> 2.30 and glibc 2.27). I am still working on use vanilla kernel but 
>> there are some build issues to fix.
>>
>> You can clone from Github, build then run it on qemu 2.12.0 followed 
>> by the README.md in repo. I also tried it on HiFive-U board w/ 
>> ramdisk last week but the macb driver doesn't work, I will try to fix 
>> it when I have more time later.
>>
>> repo:
>>   - https://github.com/xfguo/riscv-openwrt-port (build images/bbl/qemu)
>>   - https://github.com/xfguo/riscv-openwrt (openwrt)
>>
>> Will try to submit patches after solve all the problems, also need to 
>> wait master bump to gcc/7.3 and linux/4.15+.
>
> Good to see you working on RISC-V too, we've talked earlier in 
> February, let's sync up. :)  I have a port working in QEMU and aimed 
> at getting it working on the Unleashed board, so maybe we could join 
> the efforts.
>
> In trunk, the default is to use GCC7 (7.3.0 currently), so there's no 
> issue. For binutils, the version can be selected to use 2.30. As for 
> glibc, until it's bounced to 2.27, it's OK to have the target in a 
> staging tree.
>
> For the kernel version, I don't know what the plans are, but I'd 
> guesstimate the "next" version to find its way into trunk would be the 
> next longterm kernel, which is not yet announced. I'll check if anyone 
> has done a full patchset for either 4.15 or 4.16, but as I see You've 
> already done an initial stab at this. There were a lot of patches for 
> riscv in 4.15, so it'd make sense to try either that or 4.16.
>
> For the userland packages, I have a buildbot set up only to try to 
> build the non-core OpenWrt packages on riscv, to see which one need 
> amending, will share that later on.
>
> Regards,
> Zoltan H
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