Re: ååï Re: ååï Status of 'unicore32' architecture in Linux kernel

[Guenter Roeck]

On Wed, Sep 03, 2014 at 08:09:28AM +0800, Xuetao Guan  wrote:
> 
> [...]
> > > 
> > > > 
> > > > unicore32: Add ocd console and qemu-defconfig to support qemu simulator
> > > > 	This patch adds a primitive OCD console to communicate with qemu.
> > > > 	The same code is already used for early console support.
> > > 
> > > Do you mean there's the same/similar code in QEMU.
> > > 
> > No, I mean that the ocd functions in the linux kernel (such as ocd_putc) are
> > used by both earlyprintk and the ocd console code.
> Yes. By the way, it's only for qemu and fpga debug.
> 
> > 
> > > > 
> > > > With this patch added, and with qemu_defconfig as provided by the same patch,
> > > > it is possible to build and load a unicore32 image in qemu using the following
> > > > qemu command line.
> > > > 
> > > > qemu-system-unicore32 -curses -M puv3 -m 512 -kernel arch/unicore32/boot/zImage
> > > > 
> > > > Caveats:
> > > > - The use of -nographic instead of -curses causes a qemu crash
> > > Yes, since qemu curses code was modified to meet the simple OCD console requirement.
> > > 
> > The lack of support for -nographic is a problem for scripted testing.
> > The issue is that we have to interpret console output for scripted testing,
> > and having to go through curses makes that a bit difficult.
> > 
> > Wonder if '-nographic' can be modeled as '-curses' with no available terminal
> > configuration. At least in theory that should work, but executing the above
> > command with TERM=dumb yields no output. Wonder how difficult it would be to
> > change that.
> 
> I see. I'll try to make -nographic work anyway.
> 
Please try the following patch. That seems to do it.
I am sure it can be improved, but it is a start.

Thanks,
Guenter

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