[v2 3/9] ARM: tegra: # of CPU cores detection w/ & w/o HAVE_ARM_SCU

[Russell King - ARM Linux]

On Tue, Jan 08, 2013 at 02:47:37PM +0200, Hiroshi Doyu wrote:
> The method to detect the number of CPU cores on Cortex-A9 MPCore and
> Cortex-A15 MPCore is different. On Cortex-A9 MPCore we can get this
> information from the Snoop Control Unit(SCU). On Cortex-A15 MPCore we
> have to read it from the system coprocessor(CP15), because the SCU on
> Cortex-A15 MPCore does not have software readable registers. This
> patch selects the correct method at runtime based on the CPU ID.
> 
> Signed-off-by: Hiroshi Doyu <hdoyu at nvidia.com>
> ---
>  arch/arm/mach-tegra/platsmp.c |   31 ++++++++++++++++++++++++++++---
>  1 file changed, 28 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm/mach-tegra/platsmp.c b/arch/arm/mach-tegra/platsmp.c
> index 1b926df..68e76ef 100644
> --- a/arch/arm/mach-tegra/platsmp.c
> +++ b/arch/arm/mach-tegra/platsmp.c
> @@ -23,6 +23,7 @@
>  #include <asm/hardware/gic.h>
>  #include <asm/mach-types.h>
>  #include <asm/smp_scu.h>
> +#include <asm/cputype.h>
>  
>  #include <mach/powergate.h>
>  
> @@ -34,9 +35,13 @@
>  #include "common.h"
>  #include "iomap.h"
>  
> +#define CPU_MASK		0xff0ffff0
> +#define CPU_CORTEX_A9		0x410fc090
> +#define CPU_CORTEX_A15		0x410fc0f0

NAK. There's some patches around to make this stuff generic, we don't
need more ifdefs springing up.  We need to get those generic patches
in.