[U-Boot] [PATCH 2/2] sunxi: Set the AUXCR L2EN bit for sun4i/sun5i in FEL boot mode

Ian Campbell
2014-07-21T20:07:17Z

On Fri, 2014-07-18 at 20:47 +0200, Jeroen Hofstee wrote:
> Hello Siarhei,
>
> On 18-07-14 19:09, Siarhei Siamashka wrote:
> > This is needed to have feature parity with the normal boot mode,
> > where the L2EN bit in the CP15 Auxiliary Control Register is set
> > by the BROM code right from the start.
> >
> > If this is not done, the Linux system ends up booted with the L2 cache
> > disabled.
> >
>
> I don't know a single about the sunxi, but shouldn't linux
> be patched instead. The commit message seems to indicate
> it is not an u-boot issue.

The ACTLR may not be writeable from NS mode so it has to be setup in the
bootloader before dropping to NS mode.

In any case I think these sorts of low level platform specific details
are the sort of thing which the bootloader probably ought to be setting
up.

Ian