Re: Self modifying code in ARM 11 architectures

["Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>]

Hello,

On Wed, May 25, 2011 at 01:18:37PM +0530, Vimal Singh wrote:
> CC'ing correct ARM mailing list.
> 
> On Tue, May 24, 2011 at 3:48 PM, Ashok Babu <ashok3d@gmail.com> wrote:
> > Hi All,
> >
> > I am no success in booting up the ARM1176 processor with the
> > linux-2.6.32 kernel.
> > While googling about the ARM Harvard architecture, I came to know that
> > we have to flush/invalidate the D-Cache and I-Cache
> > when using the self modifying codes.
> >
> > So here my questions/doubts :
> > 1) Is'nt it the kernel itself is self modifying code with lots of
> > function pointers ?
Code that uses function pointer isn't usually called self-modifying.

> >     If yes, how is synchronization b/w d-cache and i-cache handled in
> > the kernel ?
> > 2) Can this be the reason for the kernel not booting for me ?
> >     Because If i disable the I-Cache in the config, then the kernel
> > boots up without any issues.
> > Any pointers on this will be of great help.
Does your bootloader correctly disables the I-Cache before giving control
to Linux?

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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