From: Yingjoe Chen <yingjoe.chen@mediatek.com>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Matthias Brugger <matthias.bgg@gmail.com>,
<devicetree@vger.kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Stephen Boyd <sboyd@codeaurora.org>,
<linux-kernel@vger.kernel.org>, Rob Herring <robh+dt@kernel.org>,
<linux-mediatek@lists.infradead.org>,
Sascha Hauer <kernel@pengutronix.de>,
Olof Johansson <olof@lixom.net>, <srv_heupstream@mediatek.com>,
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v4 3/5] ARM: mediatek: add smp bringup code
Date: Thu, 1 Oct 2015 21:45:49 +0800 [thread overview]
Message-ID: <1443707149.22188.1.camel@mtksdaap41> (raw)
In-Reply-To: <20150926093835.GA20255@n2100.arm.linux.org.uk>
On Sat, 2015-09-26 at 10:38 +0100, Russell King - ARM Linux wrote:
> On Thu, Sep 24, 2015 at 11:38:58PM +0800, Yingjoe Chen wrote:
> > +struct mtk_smp_boot_info {
> > + unsigned long smp_base;
> ...
> > +static const struct mtk_smp_boot_info mtk_mt8135_tz_boot = {
> > + 0x80002000, 0x3fc,
> ...
> > +static const struct mtk_smp_boot_info mtk_mt6589_boot = {
> > + 0x10002000, 0x34,
> ...
> > + if (trustzone) {
> > + /* smp_base(trustzone-bootinfo) is reserved by device tree */
> > + mtk_smp_base = phys_to_virt(mtk_smp_info->smp_base);
>
> I can't say whether this is correct or not, as we've got rid of most of
> the information that would allow me to make that decision.
>
> The address passed to phys_to_virt() _must_ be one which is mapped by
> the kernel as lowmem. I've no idea if the above would fall into that
> category though.
>
Currently only mt8127/mt8135 trustzone firmware use this reserve
location. The reserved memory is before kernel code, so it will
definitely in lowmem.
Joe.C
next prev parent reply other threads:[~2015-10-01 13:46 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-24 15:38 [PATCH v4 0/5] Add SMP bringup support for mt65xx socs Yingjoe Chen
2015-09-24 15:38 ` [PATCH v4 1/5] ARM: mediatek: enable gpt6 on boot up to make arch timer working Yingjoe Chen
2015-09-24 15:38 ` [PATCH v4 2/5] devicetree: bindings: add new SMP enable method Mediatek SoC Yingjoe Chen
2015-09-28 17:46 ` Rob Herring
2015-09-24 15:38 ` [PATCH v4 3/5] ARM: mediatek: add smp bringup code Yingjoe Chen
2015-09-26 9:38 ` Russell King - ARM Linux
2015-10-01 13:45 ` Yingjoe Chen [this message]
2015-09-24 15:38 ` [PATCH v4 4/5] ARM: dts: mt8135: enable basic SMP bringup for mt8135 Yingjoe Chen
2015-09-25 4:39 ` Error: arch/arm/boot/dts/mt8135.dtsi:81.21-22 syntax error kbuild test robot
2015-09-25 5:46 ` [PATCH v4 4/5] ARM: dts: mt8135: enable basic SMP bringup for mt8135 Yingjoe Chen
2015-09-24 15:39 ` [PATCH v4 5/5] ARM: dts: mt8127: enable basic SMP bringup for mt8127 Yingjoe Chen
2015-09-25 5:12 ` Error: arch/arm/boot/dts/mt8127.dtsi:56.21-22 syntax error kbuild test robot
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