From: linux@armlinux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 0/3] ARM: l2c: add l2c support for RZ/A1
Date: Thu, 16 Feb 2017 16:44:24 +0000 [thread overview]
Message-ID: <20170216164424.GR27312@n2100.armlinux.org.uk> (raw)
In-Reply-To: <20170216161742.29320-1-chris.brandt@renesas.com>
On Thu, Feb 16, 2017 at 11:17:39AM -0500, Chris Brandt wrote:
> The PL310 in the Renesas RZ/A1 SoC (R7S72100) does not have the sideband
> signals connected between the CPU and L2C. According the PL310 TRM,
> sideband signals are optional.
>
> If a PL310 is added to a system, but the sideband signals are not
> connected, some Cortex A9 optimizations cannot be used. In particular,
> enabling Full Line Zeros in the CA9 without sidebands connected will
> crash the system since the CA9 will expect the L2C to perform operations,
> yet the L2C never gets the commands.
>
> This series adds the option to not enable anything in the PL310 that
> uses sidebands, and then adds L2C support to the RZ/A1 DT.
>
> v4:
> * changed l2x0_bresp_dis to l2x0_bresp_disable
> * changed l2x0_flz_dis to l2x0_flz_disable
Looks good, thanks.
I'll want to merge patch 1, but I suspect the other two patches need
to go through arm-soc, which will cause a problem due to being merged
independently... Arnd?
--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
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next prev parent reply other threads:[~2017-02-16 16:44 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-16 16:17 [PATCH v4 0/3] ARM: l2c: add l2c support for RZ/A1 Chris Brandt
2017-02-16 16:17 ` [PATCH v4 1/3] ARM: l2c: allow CA9 optimizations to be disabled Chris Brandt
2017-02-16 16:17 ` [PATCH v4 2/3] ARM: shmobile: r7s72100: Enable L2 cache Chris Brandt
2017-02-16 16:17 ` [PATCH v4 3/3] ARM: dts: r7s72100: add l2 cache Chris Brandt
2017-02-16 16:44 ` Russell King - ARM Linux [this message]
2017-02-16 16:57 ` [PATCH v4 0/3] ARM: l2c: add l2c support for RZ/A1 Arnd Bergmann
2017-02-16 17:21 ` Russell King - ARM Linux
2017-02-16 17:26 ` Chris Brandt
2017-03-08 18:53 ` Chris Brandt
2017-03-08 19:16 ` Russell King - ARM Linux
2017-03-08 19:35 ` Chris Brandt
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