From: marc_gonzalez@sigmadesigns.com (Marc Gonzalez)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v8 2/2] arm-soc: Add support for arm-based tango4 platforms
Date: Tue, 3 Nov 2015 09:34:49 +0100 [thread overview]
Message-ID: <563871A9.7050009@sigmadesigns.com> (raw)
In-Reply-To: <5637AD74.4080206@oracle.com>
Santosh Shilimkar wrote:
> Mark Rutland wrote:
>
>> We didn't. Having a look just now, the earliest example appears to be
>> in OMAP4 L2 support patches back in 2009 [1]. I was not able to find a
>> rationale.
>>
>> Given that the MMU is on (and speculative accesses are permitted) I
>> can't see what the DSB achieves -- it can't quiesce the memory system.
>>
>> Santosh, any idea?
>
> IIRC, it was requirement from the OMAP ROM code to have a dsb before
> we call the SMC routine. I can't recollect more than that now.
In that case, shouldn't dsb have been added to the ROM code,
on the "other side" of the smc, so as to not depend on Linux
code "getting it right"?
Regards.
next prev parent reply other threads:[~2015-11-03 8:34 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-02 15:17 [PATCH v8 0/2] Sigma Designs Tango4 port Marc Gonzalez
2015-11-02 15:18 ` [PATCH v8 1/2] arm-soc: Import initial tango4 device tree Marc Gonzalez
2015-11-02 16:01 ` Måns Rullgård
2015-11-02 17:11 ` Marc Gonzalez
2015-11-02 17:59 ` Måns Rullgård
2015-11-03 0:57 ` Måns Rullgård
2015-11-02 20:33 ` Florian Fainelli
2015-11-02 15:19 ` [PATCH v8 2/2] arm-soc: Add support for arm-based tango4 platforms Marc Gonzalez
2015-11-02 16:22 ` Måns Rullgård
2015-11-02 17:33 ` Marc Gonzalez
2015-11-02 18:01 ` Måns Rullgård
2015-11-02 18:26 ` Mark Rutland
2015-11-02 18:30 ` Måns Rullgård
2015-11-02 18:37 ` santosh shilimkar
2015-11-03 8:34 ` Marc Gonzalez [this message]
2015-11-03 10:12 ` Måns Rullgård
2015-11-03 16:37 ` santosh shilimkar
2015-11-03 17:04 ` Marc Gonzalez
2015-11-03 18:02 ` Måns Rullgård
2015-11-02 15:52 ` [PATCH v8 0/2] Sigma Designs Tango4 port Marc Gonzalez
2015-11-02 21:40 ` Arnd Bergmann
2015-11-03 9:00 ` Marc Gonzalez
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