[U-Boot] qemu and u-boot-console and other ports?

[Tom Rini]

On Fri, Dec 02, 2016 at 11:03:00AM -0700, Stephen Warren wrote:
> On 12/02/2016 07:40 AM, Tom Rini wrote:
> >Hey,
> >
> >I'm trying to debug adding sh4 and r2dplus support to test.py.  Until my
> >current round of testing is applied you'll need
> >http://patchwork.ozlabs.org/bundle/trini/fix-sh4-support-v2/ in order
> >for us to get a functional U-Boot.  After that, I have a "normal" conf
> >file for the board for QEMU that looks like:
> >console_impl=qemu
> >qemu_machine="r2d"
> >qemu_binary="qemu-system-sh4"
> >qemu_extra_args="-nographic -serial null -serial mon:stdio"
> >qemu_kernel_args="-kernel ${U_BOOT_BUILD_DIR}/u-boot.bin"
> >reset_impl=none
> >flash_impl=none
> >
> >And here's where things get funny.  When I kick off test.py with --bd
> >r2dplus --id qemu --build -s -k sleep it will build and launch the board
> >and since I have -s I can see stdio and I see U-Boot come up and give me
> >the prompt, and then test.py says it times out waiting for the prompt.
> >Any ideas where to poke next?  I want to say something is funny with
> >respect to what we see and where we see it (in terms of pipes) due to
> >having to say -serial null -serial mon:stdio so that we see port #2 on
> >the "board" rather than port #1 as this is the port that U-Boot and
> >Linux use by default.  Thanks!
> 
> Does "-serial null -serial mon:stdio" cause qemu to re-open file
> descriptors rather than just using stdout directly, or something
> like that? If so, perhaps its output is getting into the overall
> script's stdout (e.g. your terminal/console?) rather than the pipe
> that test/py is reading. If so, you'd see the qemu output but
> test/py wouldn't.
> 
> I think you can test this assumption by removing the -s option. If
> you still see qemu output, then qemu is sending it directly to
> wherever the overall stdout is going. If you no longer see qemu's
> output, then test/py must be reading it and only echo'ing it due to
> the -s option, and so you'd have to look somewhere else.

When I drop out -s instead I get:
----------------------------------- Captured stdout ------------------------------------
+u-boot-test-reset r2dplus qemu
long write to SH7750_WCR1_A7 (0x000000001f800008) ignored
long write to SH7750_WCR2_A7 (0x000000001f80000c) ignored
long write to SH7750_WCR3_A7 (0x000000001f800010) ignored
long write to SH7750_MCR_A7 (0x000000001f800014) ignored
word write to SH7750_RTCNT_A7 (0x000000001f800020) ignored
word write to SH7750_RTCOR_A7 (0x000000001f800024) ignored
Write access to refresh count register
word write to SH7750_RTCSR_A7 (0x000000001f80001c) ignored
Read access to refresh count register, incrementing
long write to SH7750_MCR_A7 (0x000000001f800014) ignored


U-Boot 2016.11-00492-ged6a1e9bbf0c (Dec 02 2016 - 14:14:17 -0500)

CPU: SH4
BOARD: Renesas Solutions R2D Plus
DRAM:  64 MiB
Flash: ERROR: too many flash sectors
8 MiB
*** Warning - bad CRC, using default environment

PCI: SH7751 PCI host bridge found.
long read to SH7750_WCR1_A7 (0x000000001f800008) ignored
long read to SH7750_WCR2_A7 (0x000000001f80000c) ignored
long read to SH7750_WCR3_A7 (0x000000001f800010) ignored
long read to SH7750_MCR_A7 (0x000000001f800014) ignored
PCI:   Bus Dev VenId DevId Class Int
PCI:
  00:00.0     - 1054:350e - Bridge device
  00:02.0     - 10ec:8139 - Network controller
In:    serial
Out:   serial
Err:   serial
Net:   RTL8139#0
Error: RTL8139#0 address not set.

IDE:   Bus 0: not available
=> => s
=========================== 92 tests deselected by '-ksleep' ===========================
======================= 1 failed, 92 deselected in 31.20 seconds =======================

So it's seeing output, but for some reason not matching on it?

-- 
Tom
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