[PATCH v4 3/6] ARM: Add Krait L2 accessor functions

Courtney Cavin
2014-01-09T00:53:33Z

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@arm.com>
> Cc: Russell King <linux@arm.linux.org.uk>
> Signed-off-by: Stephen Boyd <sboyd@codeaurora.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