[PATCHv2] arm:socfpga: Enable SMP for socfpga

[Dinh Nguyen]

Hi Rob,

On Wed, 2012-10-24 at 18:01 -0500, Rob Herring wrote:
> On 10/18/2012 12:32 PM, dinguyen at altera.com wrote:
> > From: Dinh Nguyen <dinguyen at altera.com>
> > 
> > Enable SMP for the SOCFPGA platform.
> > 
> > Signed-off-by: Pavel Machek <pavel at denx.de>
> > Signed-off-by: Dinh Nguyen <dinguyen at altera.com>
> > ---
> > v2:
> > -Remove pen_release code
> > -Remove code that was already done by v7_setup
> > -Add bindings document for reset and system manager
> > -Move socfpga_sysmgr_init from platsmp.c to socfpga.c, because
> > we will need to use the reset and system manager for more than SMP.
> > -Move core.h to mach-socfpga from mach-socfpga/include/mach
> 
> Just some lingering comments on the defconfig. Otherwise,
> 
> Reviewed-by: Rob Herring <rob.herring at calxeda.com>
> 
> > diff --git a/arch/arm/configs/socfpga_defconfig b/arch/arm/configs/socfpga_defconfig
> > index 0ac1293..349ac22 100644
> > --- a/arch/arm/configs/socfpga_defconfig
> > +++ b/arch/arm/configs/socfpga_defconfig
> 
> I'm still not clear why multi_v7 config does not work for you?

multi_v7 works fine for me. But I need
+#CONFIG_ARCH_VEXPRESS_CORTEX_A5_A9_ERRATA is not set 

in order for SMP to work correctly on our platform.


> 
> > @@ -1,5 +1,5 @@
> >  CONFIG_EXPERIMENTAL=y
> > -CONFIG_SYSVIPC=y
> > +CONFIG_NO_HZ=y
> >  CONFIG_IKCONFIG=y
> >  CONFIG_IKCONFIG_PROC=y
> >  CONFIG_LOG_BUF_SHIFT=14
> > @@ -16,10 +16,13 @@ CONFIG_MODULE_UNLOAD=y
> >  # CONFIG_IOSCHED_DEADLINE is not set
> >  # CONFIG_IOSCHED_CFQ is not set
> >  CONFIG_ARCH_SOCFPGA=y
> > -CONFIG_MACH_SOCFPGA_CYCLONE5=y
> > -CONFIG_ARM_THUMBEE=y
> > +# CONFIG_ARCH_VEXPRESS_CORTEX_A5_A9_ERRATA is not set
> >  # CONFIG_CACHE_L2X0 is not set
> >  CONFIG_HIGH_RES_TIMERS=y
> > +CONFIG_SMP=y
> > +CONFIG_ARM_ARCH_TIMER=y
> 
> You're an A9, right? You don't have arch timers.

Yes, will remove in v3.
> 
> > +CONFIG_HIGHMEM=y
> 
> How much RAM? You need more than 2GB with CONFIG_VMSPLIT_2G.

1G for RAM only, so will remove in v3.

Thanks,
Dinh
> 
> > +CONFIG_HIGHPTE=y
> >  CONFIG_VMSPLIT_2G=y
> >  CONFIG_NR_CPUS=2
> >  CONFIG_AEABI=y
> 
>