linux-kernel - Re: [PATCH v4 3/6] ARM: Add Krait L2 accessor functions

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Message-ID: <20140109005332.GB23276@sonymobile.com>
Date:	Wed, 8 Jan 2014 16:53:33 -0800
From:	Courtney Cavin <courtney.cavin@...ymobile.com>
To:	Stephen Boyd <sboyd@...eaurora.org>
CC:	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Mark Rutland <mark.rutland@....com>,
	Russell King <linux@....linux.org.uk>
Subject: Re: [PATCH v4 3/6] ARM: Add Krait L2 accessor functions

On Mon, Dec 30, 2013 at 09:14:14PM +0100, Stephen Boyd wrote:
> Krait CPUs have a handful of L2 cache controller registers that
> live behind a cp15 based indirection register. First you program
> the indirection register (l2cpselr) to point the L2 'window'
> register (l2cpdr) at what you want to read/write.  Then you
> read/write the 'window' register to do what you want. The
> l2cpselr register is not banked per-cpu so we must lock around
> accesses to it to prevent other CPUs from re-pointing l2cpdr
> underneath us.
> 
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Russell King <linux@....linux.org.uk>
> Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
> ---
>  arch/arm/common/Kconfig                   |  3 ++
>  arch/arm/common/Makefile                  |  1 +
>  arch/arm/common/krait-l2-accessors.c      | 58 +++++++++++++++++++++++++++++++
>  arch/arm/include/asm/krait-l2-accessors.h | 20 +++++++++++
>  4 files changed, 82 insertions(+)
>  create mode 100644 arch/arm/common/krait-l2-accessors.c
>  create mode 100644 arch/arm/include/asm/krait-l2-accessors.h
[...]
> +
> +extern void set_l2_indirect_reg(u32 addr, u32 val);
> +extern u32 get_l2_indirect_reg(u32 addr);

As these are Krait specific, please rename the functions to reflect
this.

-Courtney
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