From: santosh.shilimkar@ti•com (Santosh Shilimkar)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 2/3] ARM: keystone: Enable SMP support on Keystone machines
Date: Tue, 11 Jun 2013 10:54:19 -0400 [thread overview]
Message-ID: <51B73A1B.4050302@ti.com> (raw)
In-Reply-To: <51B7277B.3080107@ti.com>
On Tuesday 11 June 2013 09:34 AM, Santosh Shilimkar wrote:
> On Tuesday 11 June 2013 01:16 AM, Chander Kashyap wrote:
>> 2013/6/11 Santosh Shilimkar <santosh.shilimkar@ti•com>:
>>> Add basic SMP support for Keystone machines. This does not
>>> include support for CPU hotplug for now.
>>>
>>> Cc: Olof Johansson <olof@lixom•net>
>>> Cc: Arnd Bergmann <arnd@arndb•de>
>>> Cc: arm at kernel.org
>>>
>>> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti•com>
>>> ---
>
> [..]
>
>>> diff --git a/arch/arm/mach-keystone/platsmp.c b/arch/arm/mach-keystone/platsmp.c
>>> new file mode 100644
>>> index 0000000..3071dda
>>> --- /dev/null
>>> +++ b/arch/arm/mach-keystone/platsmp.c
>>> @@ -0,0 +1,67 @@
>>> +/*
>>> + * Keystone SOC SMP platform code
>>> + *
>>> + * Copyright 2013 Texas Instruments, Inc.
>>> + * Cyril Chemparathy <cyril@ti•com>
>>> + * Santosh Shilimkar <santosh.shillimkar@ti•com>
>>> + *
>>> + * Based on platsmp.c, Copyright (C) 2002 ARM Ltd.
>>> + *
>>> + * This program is free software; you can redistribute it and/or modify it
>>> + * under the terms and conditions of the GNU General Public License,
>>> + * version 2, as published by the Free Software Foundation.
>>> + */
>>> +
>>> +#include <linux/init.h>
>>> +#include <linux/smp.h>
>>> +#include <linux/io.h>
>>> +
>>> +#include <asm/smp_plat.h>
>>> +
>>> +#include "keystone.h"
>>> +
>>> +static void __init keystone_smp_init_cpus(void)
>>> +{
>>> + unsigned int i, ncores;
>>> +
>>> + ncores = 4;
>> This hardcoding can be done away, if cpu nodes are passed through DT.
>> Also set set_cpu_possible will be done by "arm_dt_init_cpu_maps" in devtree.c
>>
> Thanks. Will have a look at it.
>
For record, i have dropped keystone_smp_init_cpus() completely.
arm_dt_init_cpu_maps() does everything what we need. Thanks
for pointer.
Looks like other platforms can also do the same
but was curious why its not being used yet. May be I missed
some ongoing patches. Do you know ?
Regards,
Santosh
next prev parent reply other threads:[~2013-06-11 14:54 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-10 19:55 [PATCH 0/3] ARM: Add minimal support for TI Keystone SOCs Santosh Shilimkar
2013-06-10 19:55 ` [PATCH 1/3] ARM: keystone: Add minimal TI Keystone platform support Santosh Shilimkar
2013-06-11 19:27 ` Arnd Bergmann
2013-06-11 20:10 ` Santosh Shilimkar
2013-06-11 20:24 ` Arnd Bergmann
2013-06-11 20:56 ` Santosh Shilimkar
2013-06-12 19:30 ` Santosh Shilimkar
2013-06-10 19:55 ` [PATCH 2/3] ARM: keystone: Enable SMP support on Keystone machines Santosh Shilimkar
2013-06-11 5:16 ` Chander Kashyap
2013-06-11 13:34 ` Santosh Shilimkar
2013-06-11 14:54 ` Santosh Shilimkar [this message]
2013-06-10 19:55 ` [PATCH 3/3] ARM: dts: keystone: Add minimal Keystone SOC device tree data Santosh Shilimkar
2013-06-11 9:38 ` Mark Rutland
2013-06-11 13:40 ` Santosh Shilimkar
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