Le 29/02/2016 22:14, Peter Maydell a écrit :
On 29 February 2016 at 20:34, Jean-Christophe DUBOIS
<j...@tribudubois.net> wrote:
Le 29/02/2016 18:58, Peter Maydell a écrit :
To answer the question of "which of these is the correct thing to do"
we need to look at what the real hardware does when it's running Linux:
does it run Linux in Secure or Nonsecure?
i.MX6 is definitively able to boot in secure/trustzone mode (there are some
demo out there about it) so I guess it might be booting in secure mode.
Mmm. The other question I had about the system reset controller
is whether it's really purely hardware doing the "start secondary CPU",
or is it just a funny way of asking the system firmware to start
things, or is the stuff like the register for startup address
just a place to leave information that the system firmware
on the secondary CPU will read as part of its boot sequence?
Is there a datasheet available for this?
Well the SRC device is described in the i.MX6 reference manual.
http://cache.nxp.com/files/32bit/doc/ref_manual/IMX6DQRM.pdf?fpsp=1&WT_TYPE=Reference%20Manuals&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=pdf&WT_ASSET=Documentation&fileExt=.pdf
I believe it is hardware based. Now it might involve some of the
functions of the internal ROM in the process but we cannot change this
behavior in any way.
thanks
-- PMM
