From: Gabriele Paoloni <gabriele.paoloni@huawei.com>
To: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>,
Arnd Bergmann <arnd@arndb.de>
Cc: Mark Rutland <mark.rutland@arm.com>,
Yuanzhichang <yuanzhichang@hisilicon.com>,
"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
"will.deacon@arm.com" <will.deacon@arm.com>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"bhelgaas@google.com" <bhelgaas@google.com>,
"olof@lixom.net" <olof@lixom.net>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"lorenzo.pieralisi@arm.com" <lorenzo.pieralisi@arm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linuxarm <linuxarm@huawei.com>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
"linux-serial@vger.kernel.org" <linux-serial@vger.kernel.org>,
"minyard@acm.org" <minyard@acm.org>,
"benh@kernel.crashing.org" <benh@kernel.crashing.org>,
"liviu.dudau@arm.com" <liviu.dudau@arm.com>,
"zourongrong@gmail.com" <zourongrong@gmail.com>,
John Garry <john.garry@huawei.com>,
"zhichang.yuan02@gmail.com" <zhichang.yuan02@gmail.com>,
"kantyzc@163.com" <kantyzc@163.com>,
"xuwei (O)" <xuwei5@hisilicon.com>,
"marc.zyngier@arm.com" <marc.zyngier@arm.com>
Subject: RE: [PATCH V5 2/3] ARM64 LPC: Add missing range exception for special ISA
Date: Wed, 9 Nov 2016 14:51:01 +0000 [thread overview]
Message-ID: <EE11001F9E5DDD47B7634E2F8A612F2E1F8F229A@lhreml507-mbx> (raw)
In-Reply-To: <20161109135453.2e5402bd@lxorguk.ukuu.org.uk>
> -----Original Message-----
> From: One Thousand Gnomes [mailto:gnomes@lxorguk.ukuu.org.uk]
> Sent: 09 November 2016 13:55
> To: Arnd Bergmann
> Cc: Mark Rutland; Yuanzhichang; catalin.marinas@arm.com;
> will.deacon@arm.com; robh+dt@kernel.org; bhelgaas@google.com;
> olof@lixom.net; linux-arm-kernel@lists.infradead.org;
> lorenzo.pieralisi@arm.com; linux-kernel@vger.kernel.org; Linuxarm;
> devicetree@vger.kernel.org; linux-pci@vger.kernel.org; linux-
> serial@vger.kernel.org; minyard@acm.org; benh@kernel.crashing.org;
> liviu.dudau@arm.com; zourongrong@gmail.com; John Garry; Gabriele
> Paoloni; zhichang.yuan02@gmail.com; kantyzc@163.com; xuwei (O);
> marc.zyngier@arm.com
> Subject: Re: [PATCH V5 2/3] ARM64 LPC: Add missing range exception for
> special ISA
>
> > I think it is a relatively safe assumption that there is only one
> > ISA bridge. A lot of old drivers hardcode PIO or memory addresses
>
> It's not a safe assumption for x86 at least. There are a few systems
> with
> multiple ISA busses particularly older laptops with a docking station.
Mmmm right...now the point is that this kind of special devices appearing
as a special ISA bus will probably never appear on x86 platforms (I guess).
So maybe it is a safe assumption because of this...?
Thanks
Gab
>
> > when talking to an ISA device, so having multiple instances is
> > already problematic.
>
> PCMCIA devices handle it themselves so are ok. I'm not clear how the
> dual
> PIIX4 configuration used in the older IBM laptop docks actually worked
> so
> I assume the transaction went out of both bridges and providing one of
> them responded the other kept silent as you simply stuffed the card
> into
> the dock and it worked.
>
> Alan
next prev parent reply other threads:[~2016-11-09 14:52 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-08 3:47 [PATCH V5 0/3] ARM64 LPC: legacy ISA I/O support zhichang.yuan
2016-11-08 3:47 ` [PATCH V5 1/3] ARM64 LPC: Indirect ISA port IO introduced zhichang.yuan
2016-11-08 12:03 ` Mark Rutland
2016-11-08 16:09 ` Arnd Bergmann
2016-11-08 16:15 ` Arnd Bergmann
2016-11-08 23:16 ` Benjamin Herrenschmidt
2016-11-10 8:33 ` zhichang.yuan
2016-11-10 11:22 ` Mark Rutland
2016-11-10 19:32 ` Benjamin Herrenschmidt
2016-11-11 10:07 ` zhichang.yuan
2016-11-18 9:20 ` Arnd Bergmann
2016-11-18 11:12 ` zhichang.yuan
2016-11-18 11:38 ` Arnd Bergmann
2016-11-21 12:58 ` John Garry
2016-11-08 16:12 ` Will Deacon
2016-11-08 16:33 ` John Garry
2016-11-08 16:49 ` Will Deacon
2016-11-08 17:05 ` John Garry
2016-11-08 22:35 ` Arnd Bergmann
2016-11-09 11:29 ` John Garry
2016-11-09 21:33 ` Arnd Bergmann
2016-12-22 8:15 ` Ming Lei
2016-12-23 1:43 ` zhichang.yuan
2016-12-23 7:24 ` Ming Lei
2017-01-06 11:43 ` Arnd Bergmann
2016-11-08 3:47 ` [PATCH V5 2/3] ARM64 LPC: Add missing range exception for special ISA zhichang.yuan
2016-11-08 5:17 ` kbuild test robot
2016-11-08 5:27 ` kbuild test robot
2016-11-08 11:49 ` Mark Rutland
2016-11-08 16:19 ` Arnd Bergmann
2016-11-08 17:10 ` Mark Rutland
2016-11-09 13:54 ` One Thousand Gnomes
2016-11-09 14:51 ` Gabriele Paoloni [this message]
2016-11-09 21:38 ` Arnd Bergmann
2016-11-14 11:11 ` One Thousand Gnomes
2016-11-18 9:22 ` Arnd Bergmann
2016-11-08 23:12 ` Benjamin Herrenschmidt
2016-11-09 11:20 ` Mark Rutland
2016-11-10 7:08 ` Benjamin Herrenschmidt
2016-11-09 11:39 ` liviu.dudau
2016-11-09 16:16 ` Gabriele Paoloni
2016-11-09 16:50 ` liviu.dudau
2016-11-10 6:24 ` zhichang.yuan
2016-11-10 16:06 ` Gabriele Paoloni
2016-11-11 10:37 ` liviu.dudau
2016-11-08 3:47 ` [PATCH V5 3/3] ARM64 LPC: LPC driver implementation on Hip06 zhichang.yuan
2016-11-08 6:11 ` kbuild test robot
2016-11-08 16:24 ` Arnd Bergmann
2016-11-09 12:10 ` Gabriele Paoloni
2016-11-09 21:34 ` Arnd Bergmann
2016-11-10 6:40 ` zhichang.yuan
2016-11-10 9:12 ` Arnd Bergmann
2016-11-10 12:36 ` zhichang.yuan
2016-11-18 11:46 ` Arnd Bergmann
2016-11-10 15:36 ` Gabriele Paoloni
2016-11-10 16:07 ` Arnd Bergmann
2016-11-11 10:09 ` zhichang.yuan
2016-11-11 10:48 ` liviu.dudau
2016-11-11 13:39 ` Gabriele Paoloni
2016-11-11 14:45 ` liviu.dudau
2016-11-11 15:53 ` Gabriele Paoloni
2016-11-11 18:16 ` liviu.dudau
2016-11-14 8:26 ` Gabriele Paoloni
2016-11-14 11:26 ` liviu.dudau
2016-11-18 10:17 ` Arnd Bergmann
2016-11-18 12:07 ` Gabriele Paoloni
2016-11-18 12:24 ` Arnd Bergmann
2016-11-18 12:53 ` Gabriele Paoloni
2016-11-18 13:42 ` Arnd Bergmann
2016-11-18 16:18 ` Gabriele Paoloni
2016-11-18 16:34 ` Arnd Bergmann
2016-11-18 17:03 ` Gabriele Paoloni
2016-11-23 14:16 ` Arnd Bergmann
2016-11-23 15:22 ` Gabriele Paoloni
2016-11-23 17:07 ` Arnd Bergmann
2016-11-23 23:23 ` Arnd Bergmann
2016-11-24 9:12 ` zhichang.yuan
2016-11-24 10:24 ` Arnd Bergmann
2016-11-25 8:46 ` Gabriele Paoloni
2016-11-25 12:03 ` Arnd Bergmann
2016-11-25 16:27 ` Gabriele Paoloni
2016-11-11 16:54 ` zhichang.yuan
2016-11-14 11:06 ` One Thousand Gnomes
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