[PATCH v10 2/8] ARM: l2c: Refactor the driver to use commit-like interface

Tony Lindgren tony at atomide.com
Tue Dec 23 09:06:13 PST 2014

* Marek Szyprowski <m.szyprowski at samsung.com> [141223 02:51]:
> From: Tomasz Figa <t.figa at samsung.com>
> Certain implementations of secure hypervisors (namely the one found on
> Samsung Exynos-based boards) do not provide access to individual L2C
> registers. This makes the .write_sec()-based interface insufficient and
> provoking ugly hacks.
> This patch is first step to make the driver not rely on availability of
> writes to individual registers. This is achieved by refactoring the
> driver to use a commit-like operation scheme: all register values are
> prepared first and stored in an instance of l2x0_regs struct and then a
> single callback is responsible to flush those values to the hardware.

The first patch of the series applied things boot with no problem.
But after applying this one I get the following on am437x:

Unhandled fault: imprecise external abort (0xc06) at 0xb6f33884

Probably the same issue Nishanth mentioned.



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