[PATCH v1 7/7] spec/aarch64: Force strict alignment for ZynqMP

Kinsey Moore kinsey.moore at oarcorp.com
Tue Mar 9 02:24:46 UTC 2021


I was working under the impression that I didn't need it since RTEMS uses a flat
memory model. I'll be spending some time tomorrow seeing what it will take to
enable usage of the "normal" memory model via a configured MMU.

Kinsey

-----Original Message-----
From: Chris Johns <chrisj at rtems.org> 
Sent: Monday, March 8, 2021 20:08
To: Kinsey Moore <kinsey.moore at oarcorp.com>
Cc: devel at rtems.org
Subject: Re: [PATCH v1 7/7] spec/aarch64: Force strict alignment for ZynqMP

On 9/3/21 10:40 am, Kinsey Moore wrote:
> So after a little more diving into this, I have found why --strict-align is required.
> If the MMU is disabled, all memory is treated as device memory which requires
> strictly aligned accesses.

I think I have missed something or not understanding the background.

Why is the MMU disabled?

Chris


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