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Re: Emulating Solaris 10 on SPARC64 sun4u

From: BALATON Zoltan
Subject: Re: Emulating Solaris 10 on SPARC64 sun4u
Date: Thu, 7 May 2020 20:54:14 +0200 (CEST)
User-agent: Alpine 2.22 (BSF 395 2020-01-19)

On Thu, 7 May 2020, address@hidden wrote:
I've started work on emulating the SAB 82532 ESSC2 but it's
unfortunately way more complex than than the 16550A. For instance, it's

I don't know anything about this chip so don't know if it helps but if it's any way similar to ESCC (and the ESCC2 name is not just marketing) then there's some emulation of that in hw/char/escc.c that you may want to look at.

possible to configure different baudrates for receiving and
transmitting. QEMU's chardev interface doesn't appear to handle that.
QEMUSerialSetParams has a single speed value that is passed to
cfsetispeed and cfsetospeed. The chip also has support for stick parity
, which aren't valid options right now either. If I'm wrong on either
of those points please correct me. Unless there is an alternative,
changes to the interface may need to be made if adding this device is
to be considered.

Maybe you can get away with setting these to the values the driver would set and hard coding it for now just to get some output. Then you can ignore the corresponding registers which could simplify initial device model.


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