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From: marc.zyngier@arm.com (Marc Zyngier)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/5] ARM: dts: Device tree for AXM55xx.
Date: Tue, 15 Apr 2014 13:42:53 +0100	[thread overview]
Message-ID: <534D294D.7000201@arm.com> (raw)
In-Reply-To: <02c006a6fc64131df82981abbc1c71c7af52254e.1397552154.git.anders.berg@lsi.com>

Hi Anders,

On 15/04/14 13:06, Anders Berg wrote:
> Add device tree for the Amarillo validation board with an AXM5516 SoC.
> 
> Signed-off-by: Anders Berg <anders.berg@lsi.com>
> ---
>  arch/arm/boot/dts/Makefile             |   1 +
>  arch/arm/boot/dts/axm5516-amarillo.dts |  51 ++++++
>  arch/arm/boot/dts/axm5516-cpus.dtsi    | 204 ++++++++++++++++++++++
>  arch/arm/boot/dts/axm55xx.dtsi         | 306 +++++++++++++++++++++++++++++++++
>  4 files changed, 562 insertions(+)
>  create mode 100644 arch/arm/boot/dts/axm5516-amarillo.dts
>  create mode 100644 arch/arm/boot/dts/axm5516-cpus.dtsi
>  create mode 100644 arch/arm/boot/dts/axm55xx.dtsi
> 

[...]

> +       gic: interrupt-controller at 2001001000 {
> +               compatible = "arm,cortex-a15-gic";
> +               #interrupt-cells = <3>;
> +               #address-cells = <0>;
> +               interrupt-controller;
> +               reg = <0x20 0x01001000 0 0x1000>,
> +                     <0x20 0x01002000 0 0x1000>,
> +                     <0x20 0x01004000 0 0x2000>,
> +                     <0x20 0x01006000 0 0x2000>;
> +               interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(4) |
> +                               IRQ_TYPE_LEVEL_HIGH)>;
> +       };

Given how many CPUs this system has, what's the catch regarding the GIC?
Is there a second one shadowing this one at the same address for another
set of 8 CPUs? Is there an additional mechanism to IPI the other CPUs?

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...

WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <marc.zyngier@arm.com>
To: Anders Berg <anders.berg@lsi.com>
Cc: "arnd@arndb.de" <arnd@arndb.de>,
	"olof@lixom.net" <olof@lixom.net>,
	"mturquette@linaro.org" <mturquette@linaro.org>,
	Mark Rutland <Mark.Rutland@arm.com>,
	"dbaryshkov@gmail.com" <dbaryshkov@gmail.com>,
	"linus.walleij@linaro.org" <linus.walleij@linaro.org>,
	"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 2/5] ARM: dts: Device tree for AXM55xx.
Date: Tue, 15 Apr 2014 13:42:53 +0100	[thread overview]
Message-ID: <534D294D.7000201@arm.com> (raw)
In-Reply-To: <02c006a6fc64131df82981abbc1c71c7af52254e.1397552154.git.anders.berg@lsi.com>

Hi Anders,

On 15/04/14 13:06, Anders Berg wrote:
> Add device tree for the Amarillo validation board with an AXM5516 SoC.
> 
> Signed-off-by: Anders Berg <anders.berg@lsi.com>
> ---
>  arch/arm/boot/dts/Makefile             |   1 +
>  arch/arm/boot/dts/axm5516-amarillo.dts |  51 ++++++
>  arch/arm/boot/dts/axm5516-cpus.dtsi    | 204 ++++++++++++++++++++++
>  arch/arm/boot/dts/axm55xx.dtsi         | 306 +++++++++++++++++++++++++++++++++
>  4 files changed, 562 insertions(+)
>  create mode 100644 arch/arm/boot/dts/axm5516-amarillo.dts
>  create mode 100644 arch/arm/boot/dts/axm5516-cpus.dtsi
>  create mode 100644 arch/arm/boot/dts/axm55xx.dtsi
> 

[...]

> +       gic: interrupt-controller@2001001000 {
> +               compatible = "arm,cortex-a15-gic";
> +               #interrupt-cells = <3>;
> +               #address-cells = <0>;
> +               interrupt-controller;
> +               reg = <0x20 0x01001000 0 0x1000>,
> +                     <0x20 0x01002000 0 0x1000>,
> +                     <0x20 0x01004000 0 0x2000>,
> +                     <0x20 0x01006000 0 0x2000>;
> +               interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(4) |
> +                               IRQ_TYPE_LEVEL_HIGH)>;
> +       };

Given how many CPUs this system has, what's the catch regarding the GIC?
Is there a second one shadowing this one at the same address for another
set of 8 CPUs? Is there an additional mechanism to IPI the other CPUs?

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...

  reply	other threads:[~2014-04-15 12:42 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-15 12:06 [PATCH 0/5] Add platform support for LSI AXM55xx Anders Berg
2014-04-15 12:06 ` Anders Berg
2014-04-15 12:06 ` [PATCH 1/5] ARM: Add platform support for LSI AXM55xx SoC Anders Berg
2014-04-15 12:06   ` Anders Berg
2014-04-15 12:30   ` Arnd Bergmann
2014-04-15 12:30     ` Arnd Bergmann
2014-04-24  8:58     ` Anders Berg
2014-04-24  8:58       ` Anders Berg
2014-04-24  9:04   ` Russell King - ARM Linux
2014-04-24  9:04     ` Russell King - ARM Linux
2014-04-15 12:06 ` [PATCH 2/5] ARM: dts: Device tree for AXM55xx Anders Berg
2014-04-15 12:06   ` Anders Berg
2014-04-15 12:42   ` Marc Zyngier [this message]
2014-04-15 12:42     ` Marc Zyngier
2014-04-15 14:56     ` Anders Berg
2014-04-15 14:56       ` Anders Berg
2014-04-15 12:45   ` Arnd Bergmann
2014-04-15 12:45     ` Arnd Bergmann
2014-04-15 15:20     ` Anders Berg
2014-04-15 15:20       ` Anders Berg
2014-04-15 15:23       ` Arnd Bergmann
2014-04-15 15:23         ` Arnd Bergmann
2014-04-22 21:21         ` Linus Walleij
2014-04-22 21:21           ` Linus Walleij
2014-04-22 21:31     ` Linus Walleij
2014-04-22 21:31       ` Linus Walleij
2014-04-22 21:39     ` Russell King - ARM Linux
2014-04-22 21:39       ` Russell King - ARM Linux
2014-04-15 12:06 ` [PATCH 3/5] ARM: axxia: Adding defconfig " Anders Berg
2014-04-15 12:06   ` Anders Berg
2014-04-15 12:06 ` [PATCH 4/5] power: reset: Add Axxia system reset driver Anders Berg
2014-04-15 12:06   ` Anders Berg
2014-04-15 12:06 ` [PATCH 5/5] ARM: dts: axxia: Add reset controller Anders Berg
2014-04-15 12:06   ` Anders Berg

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