Re: [PATCH 2/8] ARM: cns3xxx: Add support for SMP

Russell King - ARM Linux
2010-11-30T18:14:42Z

On Tue, Nov 30, 2010 at 08:17:00PM +0300, Anton Vorontsov wrote:
> Nothing fancy needs to be done, just use generic SCU routines.
>
> Signed-off-by: Anton Vorontsov <avorontsov@mvista.com>

This I assume is an age old patch.

> diff --git a/arch/arm/mach-cns3xxx/include/mach/smp.h b/arch/arm/mach-cns3xxx/include/mach/smp.h
> new file mode 100644
> index 0000000..44aa7ea
> --- /dev/null
> +++ b/arch/arm/mach-cns3xxx/include/mach/smp.h
> @@ -0,0 +1,28 @@
> +/*
> + * Copyright 2002 ARM Ltd.
> + * Copyright 2008 Cavium Networks
> + *
> + * This file is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License, Version 2, as
> + * published by the Free Software Foundation.
> + */
> +
> +#ifndef __MACH_SMP_H
> +#define __MACH_SMP_H
> +
> +#include <asm/hardware/gic.h>
> +
> +#define hard_smp_processor_id() \
> + ({ \
> + unsigned int cpunum; \
> + __asm__("mrc p15, 0, %0, c0, c0, 5" \
> + : "=r" (cpunum)); \
> + cpunum &= 0x0F; \
> + })

#include <asm/smp_mpidr.h>

replaces this, but it's not actually necessary - it's only used by some
bug checking code in the CPU hotplug code. I'm shortly going to be
deleting all hard_smp_processor_id() implementations.