From: mans@mansr.com (Måns Rullgård)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v8 2/2] arm-soc: Add support for arm-based tango4 platforms
Date: Tue, 03 Nov 2015 10:12:56 +0000 [thread overview]
Message-ID: <yw1xtwp38k7r.fsf@unicorn.mansr.com> (raw)
In-Reply-To: <563871A9.7050009@sigmadesigns.com> (Marc Gonzalez's message of "Tue, 3 Nov 2015 09:34:49 +0100")
Marc Gonzalez <marc_gonzalez@sigmadesigns.com> writes:
> 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"?
You're new to this, aren't you? :)
--
M?ns Rullg?rd
mans at mansr.com
next prev parent reply other threads:[~2015-11-03 10:12 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
2015-11-03 10:12 ` Måns Rullgård [this message]
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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