On Wed, Dec 02, 2015 at 04:03:03PM +0100, Hauke Mehrtens wrote:
> On 12/01/2015 05:24 PM, Kapil Hali wrote:
> > From: Jon Mason <jonmason@xxxxxxxxxxxx>
> >
> > Add SMP support for Broadcom's 4708 SoCs.
> >
> > Signed-off-by: Jon Mason <jonmason@xxxxxxxxxxxx>
> > Acked-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
> > Tested-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
> > Signed-off-by: Kapil Hali <kapilh@xxxxxxxxxxxx>
> > ---
> > arch/arm/boot/dts/bcm4708.dtsi | 2 ++
> > arch/arm/mach-bcm/Kconfig | 1 +
> > arch/arm/mach-bcm/Makefile | 3 +++
> > 3 files changed, 6 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/bcm4708.dtsi b/arch/arm/boot/dts/bcm4708.dtsi
> > index 31141e8..eed4dd1 100644
> > --- a/arch/arm/boot/dts/bcm4708.dtsi
> > +++ b/arch/arm/boot/dts/bcm4708.dtsi
> > @@ -15,6 +15,7 @@
> > cpus {
> > #address-cells = <1>;
> > #size-cells = <0>;
> > + enable-method = "brcm,bcm-nsp-smp";
> >
> > cpu@0 {
> > device_type = "cpu";
> > @@ -27,6 +28,7 @@
> > device_type = "cpu";
> > compatible = "arm,cortex-a9";
> > next-level-cache = <&L2>;
> > + secondary-boot-reg = <0xffff0400>;
> > reg = <0x1>;
> > };
> > };
> > diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
> > index 83765a0..e85246f 100644
> > --- a/arch/arm/mach-bcm/Kconfig
> > +++ b/arch/arm/mach-bcm/Kconfig
> > @@ -54,6 +54,7 @@ config ARCH_BCM_NSP
> > config ARCH_BCM_5301X
> > bool "Broadcom BCM470X / BCM5301X ARM SoC" if ARCH_MULTI_V7
> > select ARCH_BCM_IPROC
> > + select HAVE_SMP
> > help
> > Support for Broadcom BCM470X and BCM5301X SoCs with ARM CPU cores.
> >
>
> When applying this patch please make sure it is correctly applied this
> patch causes some problems here:
>
> http://www.spinics.net/lists/arm-kernel/msg462137.html
>
> > diff --git a/arch/arm/mach-bcm/Makefile b/arch/arm/mach-bcm/Makefile
> > index 5193a25..7d66515 100644
> > --- a/arch/arm/mach-bcm/Makefile
> > +++ b/arch/arm/mach-bcm/Makefile
> > @@ -43,6 +43,9 @@ obj-$(CONFIG_ARCH_BCM2835) += board_bcm2835.o
> >
> > # BCM5301X
> > obj-$(CONFIG_ARCH_BCM_5301X) += bcm_5301x.o
> > +ifeq ($(CONFIG_ARCH_BCM_5301X),y)
> > +obj-$(CONFIG_SMP) += platsmp.o
> > +endif
> >
> > # BCM63XXx
> > ifeq ($(CONFIG_ARCH_BCM_63XX),y)
> >
>
> I am getting this on a Northstar 1 / BCM4708:
>
> [ 0.137634] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
> [ 0.143643] Setting up static identity map for 0x82a0 - 0x82d4
> [ 0.189772] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
> [ 0.189861] Brought up 2 CPUs
> [ 0.198845] SMP: Total of 2 processors activated (3188.32 BogoMIPS).
> [ 0.205446] CPU: WARNING: CPU(s) started in wrong/inconsistent modes
> (primary CPU mode 0x13)
> [ 0.214167] CPU: This may indicate a broken bootloader or firmware.
>
> I assume that this is correct and the bootloader is just broken, it uses
> this bootloader: "CFE for Foxconn Router version: v1.0.14", I haven't
> noticed any problems, so it is ok for me.
On my 4708 SVK, I see the same issue
[ 0.090877] CPU: Testing write buffer coherency: ok
[ 0.091231] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[ 0.091377] Setting up static identity map for 0x82a0 - 0x82f8
[ 0.130146] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[ 0.130251] Brought up 2 CPUs
[ 0.130323] SMP: Total of 2 processors activated (3188.32 BogoMIPS).
[ 0.130345] CPU: WARNING: CPU(s) started in wrong/inconsistent modes (primary CPU mode 0x13)
[ 0.130374] CPU: This may indicate a broken bootloader or firmware.
I'll investigate it more and see if I can bottom out on the cause.
Thanks,
Jon
>
> Hauke
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