[U-Boot] [RFC PATCH 4/5] arm: v7R: Add support for MPU

[Tom Rini]

On Tue, Apr 24, 2018 at 06:24:47PM +0530, Lokesh Vutla wrote:

> The Memory Protection Unit(MPU) allows to partition memory into regions
> and set individual protection attributes for each region. In absence
> of MPU a default map[1] will take effect. Add support for configuring
> MPU on Cortex-R, by reusing the existing support for Cortex-M processor.
> 
> [1] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0460d/I1002400.html
> 
> Signed-off-by: Lokesh Vutla <lokeshvutla at ti.com>
> ---
>  arch/arm/Kconfig                  |  11 +++
>  arch/arm/cpu/armv7/Makefile       |   2 +
>  arch/arm/cpu/armv7/mpu_v7r.c      | 109 ++++++++++++++++++++++++++++++
>  arch/arm/cpu/armv7m/Makefile      |   3 +-
>  arch/arm/cpu/armv7m/mpu.c         |  41 +----------
>  arch/arm/include/asm/armv7m_mpu.h |  69 +++++++++++++++++++

How close are armv7/mpu_v7r.c and armv7m/mpu.c ?  If we did some
underlying work so that armv7m/ and be put into armv7/ (and we introduce
CPU_V7A say, as I mentioned in another part of the thread so the
Makefile isn't too ugly) could we have a single mpu.c file, cleanly?

-- 
Tom
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