Messages in this thread | | | From | Barry Song <> | Date | Mon, 19 May 2014 17:11:06 +0800 | Subject | Re: [RFC PATCH] ARM: cache-l2x0: add setup entry for l2 in non-secure mode |
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2014-05-19 8:29 GMT+08:00 Gioh Kim <gioh.kim@lge.com>: > > > 2014-05-18 오후 10:13, Barry Song 쓴 글: > >> 2014-05-15 13:39 GMT+08:00 Gioh Kim <gioh.kim@lge.com>: >>> >>> >>> Hi, >>> >>> My board is using Trustzone and running kernel is non-secure mode. >>> But setup function of PL310 driver is only for secure mode kernel. >>> >>> What about adding an entry for non-secure mode setup function? >>> >>> I'm sorry for my poor code but I just wanna say what I need . >> >> >> Gioh, >> >> i don't really understand what is the user scenarios for this, if you >> are running linux in non-secure mode, your security-mode codes have >> enabled L2, so this makes non-secure linux have no chance to execute >> setup at all: > > > My platform runs linux kernel before L2 cache activation. > And the L2 cache is activated when the kernel sends command to Trustzone > firmware. > At this moment L2 is not activated. Linux should send command for L2 > activation to Trustzone at the moment.
i think you can send command to trustzone firmware to enable L2 at first, then make your Linux l2 driver run.
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