Re: Initial Mini-OS port to ARM64

[Julien Grall <julien.grall@linaro.org>]

On 16/02/14 15:51, Chen Baozi wrote:
> Hi all,

Hello Chen,

> It is much later than I used to expect. I guess it might be help
> to publish my work, though it is still not finished (and might not
> be finished very soon...).
>
> I began to try to port mini-os to ARM64 since last summer. Since
> the 64-bit guest support is not quite well at that time, this
> work had been stopped for a long time until two months ago.
>
> Though it is still at very early stage, it at least can be built,
> setup a early page table for booting, parse the DTB passed by the
> hypervisor, and be debugged by printk at present. So I put it
> on github in case someone might be interested in it. Here is the
> url: https://github.com/baozich/minios-arm64

Good job!

> Right now, there are some troubles to make GIC work properly,
> as I didn’t consider mapping GIC’s interface in address space and
> follows x86’s memory layout which make the kernel virtual address
> starts at 0x0. I’ll fix it as soon as possible.

I think you should try to sync up with Karim (in CC). He has started to 
port mini-OS on arm32. Except assembly code (which should be fairly 
small) everything can be shared between the both architecture.

If I remember correctly, Karim already wrote a GIC support but without 
FDT support.

> Besides, there is still lots of work to be done. So any comments
> or patches are welcome.

Regards,

-- 
Julien Grall