[BUG] ARM: socfpga: L2 cache init

[Steffen Trumtrar]

On Wed, Feb 25, 2015 at 10:30:32AM -0600, Dinh Nguyen wrote:
> On Wed, Feb 25, 2015 at 3:26 AM, Russell King - ARM Linux
> <linux at arm.linux.org.uk> wrote:
> > On Tue, Feb 24, 2015 at 05:55:05PM -0600, Dinh Nguyen wrote:
> >> Do you have a recommendation on what should be done?
> >
> > Please try this:
> >
> >  arch/arm/mach-socfpga/socfpga.c | 5 +++++
> >  1 file changed, 5 insertions(+)
> >
> > diff --git a/arch/arm/mach-socfpga/socfpga.c b/arch/arm/mach-socfpga/socfpga.c
> > index 383d61e138af..f5e597c207b9 100644
> > --- a/arch/arm/mach-socfpga/socfpga.c
> > +++ b/arch/arm/mach-socfpga/socfpga.c
> > @@ -23,6 +23,7 @@
> >  #include <asm/hardware/cache-l2x0.h>
> >  #include <asm/mach/arch.h>
> >  #include <asm/mach/map.h>
> > +#include <asm/cacheflush.h>
> >
> >  #include "core.h"
> >
> > @@ -73,6 +74,10 @@ void __init socfpga_sysmgr_init(void)
> >                         (u32 *) &socfpga_cpu1start_addr))
> >                 pr_err("SMP: Need cpu1-start-addr in device tree.\n");
> >
> > +       /* Ensure that socfpga_cpu1start_addr is visible to other CPUs */
> > +       smp_wmb();
> > +       sync_cache_w(&socfpga_cpu1start_addr);
> > +
> >         sys_manager_base_addr = of_iomap(np, 0);
> >
> >         np = of_find_compatible_node(NULL, NULL, "altr,rst-mgr");
> >
> > --
> 
> 
> Thanks Russell! I have been able to run the test for > 30 minutes now
> with both cores coming up just fine.
> 

\o/ That sounds very good.

> Do you mind taking this patch for 4.0-rc? If so,
> 
> Tested-by: Dinh Nguyen <dinguyen at opensource.altera.com>
> 
> Steffen, if you don't mind, do you want to test on your setup as well?
> 

Yes, of course. Let's see how fast I can get my test running again,
my Sockit is at the Embedded World ATM :-(

Thanks,
Steffen

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