linux-kernel - Re: [PATCH 7/8] ARM64: dts: amlogic: Extend GXBaby GIC node

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Date:	Tue, 1 Mar 2016 23:46:59 +0100
From:	Andreas Färber <afaerber@...e.de>
To:	Andre Przywara <andre.przywara@....com>,
	linux-meson@...glegroups.com
Cc:	Mark Rutland <mark.rutland@....com>,
	devicetree <devicetree@...r.kernel.org>,
	Matthias Brugger <mbrugger@...e.com>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Nicolas Saenz <nicolassaenzj@...il.com>,
	Will Deacon <will.deacon@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Kumar Gala <galak@...eaurora.org>,
	Carlo Caione <carlo@...one.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 7/8] ARM64: dts: amlogic: Extend GXBaby GIC node

Am 01.03.2016 um 13:43 schrieb Andre Przywara:
> On 01/03/16 11:18, Andreas Färber wrote:
>> Am 01.03.2016 um 12:01 schrieb Andre Przywara:
>>> On 29/02/16 23:44, Andreas Färber wrote:
>>>>  			reg = <0x0 0xc4301000 0 0x1000>,
>>>> -			      <0x0 0xc4302000 0 0x0100>;
>>>> +			      <0x0 0xc4302000 0 0x0100>,
>>>
>>> Please use 0x2000 for the size here. I guess this is really the GIC-400
>>> from ARM, and in this case this is the right size, [1] is the reference
>>> here. This will enable EOI mode 1 for KVM.
>>
>> Will test later.
>>
>> Is there any easy way to find out whether or not this is that GIC-400?
> 
> If you can read registers: GICD_IIDR and PIDRx have some info:
> http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0471b/CHDIFAEE.html
> So if your U-Boot for instance supports md, a dump of:
> md.l c4301008 1
> md.l c4301fd0 30
> 
> would help to identify the GIC.

gxb_p200_v1#md.l c4301008 1
c4301008: 0200143b                               ;...
gxb_p200_v1#md.l c4301fd0 30
c4301fd0: 00000004 00000000 00000000 00000000    ................
c4301fe0: 00000090 000000b4 0000002b 00000000    ........+.......
c4301ff0: 0000000d 000000f0 00000005 000000b1    ................
c4302000: 00000060 000000f0 00000003 000003ff    `...............
c4302010: 00000000 000000ff 000003ff 00000000    ................
c4302020: 00000000 00000000 00000000 00000000    ................
c4302030: 00000000 00000000 00000000 00000000    ................
c4302040: 00000000 00000000 00000000 00000000    ................
c4302050: 00000000 00000000 00000000 00000000    ................
c4302060: 00000000 00000000 00000000 00000000    ................
c4302070: 00000000 00000000 00000000 00000000    ................
c4302080: 00000000 00000000 00000000 00000000    ................

Cheers,
Andreas

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