Trustzone and caches

Hi,

this question is following my work on the PL310 L2 cache of an imx6 board (see The specified item was not found. ).

We are developing a secure OS that will run alongside Linux. At boot, our secure OS will start a couple application before actually starting Linux.

With this scenario, MMU is activated on the Secure Side (which does not interfere with the Normal World) but L2 cache is also configured *before* Linux is started.

Is this a problem ? Do we have to wait for Linux to set turn it's MMU on or can we configure the L2 cache without worrying about the normal world ?

Best,

Vincent

Parents Reply Children
No data
More questions in this forum