i.MX53QSB port + IOmem access

Adam Lackorzynski adam at os.inf.tu-dresden.de
Wed Aug 8 23:07:56 CEST 2012

On Tue Aug 07, 2012 at 14:23:31 -0700, Andy Wagner wrote:
> PT checks are probably adequate <those should not be modifiable from usr>
> but any user-context that can map the pages gets access.
> IO and the io configuration enforce resource assignment policy here
> and granularity is adequately fine to segregate resources via .cfg file
> entries.

Yes, this is the case.

> Agreed that trapping slows down IO process but could make porting
> more transparent. Tradeoff is the amount of work required to manage
> within the BSP and have that correspond to IO <or wherever the
> handler would be most suitable>. There is work in either case and
> it is probably more easily achieved by having the bits cleared
> at boot or init and minimizing changes required to linux.
> TZ would be still more entertaining to support.

At least entertaining... :)

Adam                 adam at os.inf.tu-dresden.de
  Lackorzynski         http://os.inf.tu-dresden.de/~adam/

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