----- Guenter Roeck <li...@roeck-us.net> 写道：
> 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
Thanks. I'll test it.
BTW, Qemu codestyle is different, and tab should be replaced with blanks.
Xuetao
>
> ---
> From a7c89177b3c00e4c16bea25a0b4b2f9dc511e07b Mon Sep 17 00:00:00 2001
> From: Guenter Roeck <li...@roeck-us.net>
> Date: Tue, 2 Sep 2014 20:55:02 -0700
> Subject: [PATCH] qemu: unicore32: Add support for non-curses display
>
> Add basic support for DT_NONE and DT_NOGRAPHIC display types.
>
> Signed-off-by: Guenter Roeck <li...@roeck-us.net>
> ---
> target-unicore32/helper.c | 14 +++++++++++++-
> 1 file changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/target-unicore32/helper.c b/target-unicore32/helper.c
> index e5ebbf4..dda3772 100644
> --- a/target-unicore32/helper.c
> +++ b/target-unicore32/helper.c
> @@ -13,6 +13,7 @@
> #include "exec/gdbstub.h"
> #include "exec/helper-proto.h"
> #include "qemu/host-utils.h"
> +#include "sysemu/sysemu.h"
> #ifndef CONFIG_USER_ONLY
> #include "ui/console.h"
> #endif
> @@ -223,7 +224,18 @@ static void putc_on_screen(unsigned char ch)
>
> void helper_cp1_putc(target_ulong x)
> {
> - putc_on_screen((unsigned char)x); /* Output to screen */
> + switch(display_type) {
> + case DT_CURSES:
> + putc_on_screen((unsigned char)x); /* Output to screen */
> + break;
> + case DT_NOGRAPHIC:
> + case DT_NONE:
> + putchar((int)x);
> + break;
> + default:
> + break;
> + }
> +
> DPRINTF("%c", x); /* Output to stdout */
> }
> #endif
> --
> 1.9.1
>
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