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Re: [Qemu-devel] qemu-system-sh4 broken again.
From: |
Aurelien Jarno |
Subject: |
Re: [Qemu-devel] qemu-system-sh4 broken again. |
Date: |
Mon, 10 May 2010 17:48:56 +0200 |
User-agent: |
Mozilla-Thunderbird 2.0.0.22 (X11/20090707) |
Shin-ichiro KAWASAKI a écrit :
> Hello, Rob,
>
> This mail might be too late, but I want to report you that I
> encountered similar trouble.
>
> Using the linux kernel after the following commit, the qemu-sh
> serial console shows no output.
>
> cd5f107628ab89c5dec5ad923f1c27f4cba41972
>
> This trouble was discussed in sh-linux ML.
>
> http://marc.info/?l=linux-sh&m=127183863325672&w=2
>
> To avoid this,
>
> - add "earlyprintk=sh-sci.1" to kernel command line, and
> - modify CONFIG_SERIAL_SH_SCI_NR_UARTS valud from 1 to 2,
>
> in kernel configuration menu.
>
> I hope that this is the trouble you see.
>
The main problem here is that QEMU emulates both SCI channels as serial
port, while the real board has one of the two channel configured as a
SPI bus (for the RTC clock), and the other as a serial port.
--
Aurelien Jarno GPG: 1024D/F1BCDB73
address@hidden http://www.aurel32.net