From: Fabian Aggeler <aggelerf@ethz.ch>
To: qemu-devel@nongnu.org
Cc: peter.maydell@linaro.org, peter.crosthwaite@xilinx.com,
alex.bennee@linaro.org
Subject: [Qemu-devel] [PATCH v2 0/2] Add SP810 to Versatile Express boards
Date: Tue, 5 Aug 2014 11:32:49 +0200 [thread overview]
Message-ID: <1407231171-19572-1-git-send-email-aggelerf@ethz.ch> (raw)
Hi,
The Versatile Express emulation in QEMU currently does not
have a model of the SP810 used in real hardware. The registers
provided by this System Controller can be used to set the
frequency of the SP804 timers. On newer releases of the board
the SP804 is set to 32kHz by default and has to be increased
by writing to the SCCTRL. See:
http://lists.infradead.org/pipermail/linux-arm-kernel/2011-January/038696.html
Since QEMU sets the SP804 timers to 1MHz by default this should
be reflected in the SCCTRL register. These two patches add a
model of the SP804 to the vexpress-boards and sets the SCCTRL
register so that software that queries this register behaves
as expected.
Feedback is greatly appreciated!
Best,
Fabian
v1 -> v2:
* TIMERENXSEL prefixed with register name
* removed casts
* created header file
v1: https://lists.nongnu.org/archive/html/qemu-devel/2014-07/msg02572.html
Fabian Aggeler (2):
hw/misc/arm_sp810: Create SP810 device
hw/arm/vexpress: add SP810 to the vexpress
default-configs/arm-softmmu.mak | 1 +
hw/arm/vexpress.c | 6 ++-
hw/misc/Makefile.objs | 1 +
hw/misc/arm_sp810.c | 98 +++++++++++++++++++++++++++++++++++++++++
include/hw/misc/arm_sp810.h | 85 +++++++++++++++++++++++++++++++++++
5 files changed, 190 insertions(+), 1 deletion(-)
create mode 100644 hw/misc/arm_sp810.c
create mode 100644 include/hw/misc/arm_sp810.h
--
1.8.3.2
next reply other threads:[~2014-08-05 9:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-05 9:32 Fabian Aggeler [this message]
2014-08-05 9:32 ` [Qemu-devel] [PATCH v2 1/2] hw/misc/arm_sp810: Create SP810 device Fabian Aggeler
2014-08-05 23:03 ` Peter Crosthwaite
2014-08-06 15:55 ` Aggeler Fabian
2014-08-12 7:49 ` Peter Crosthwaite
2014-08-05 9:32 ` [Qemu-devel] [PATCH v2 2/2] hw/arm/vexpress: add SP810 to the vexpress Fabian Aggeler
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