linux-kernel - Re: [PATCH 03/11] x86/dtb: Add a device tree for CE4100

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 30 Nov 2010 12:51:41 +0100
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Mitch Bradley <wmb@...mworks.com>
CC:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Scott Wood <scottwood@...escale.com>, sodaville@...utronix.de,
	x86@...nel.org, devicetree-discuss@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/11] x86/dtb: Add a device tree for CE4100

Mitch Bradley wrote:
> Here are the properties for PCI and ISA on the OLPC XO-1.5
> platform (Via C7 x86 CPU with Via VX855 IO chip):
> 
> ok dev /pci/isa
> ok .properties
> reg                      00008800 00000000 00000000 00000000 00000000

> Note that the PCI node has no reg property.  On a system with multiple independent PCI buses at the top level, it would be necessary to distinguish them with reg properties reflecting their different addresses in the root address space.  PC-style architectures typically (always?) have a single top-level PCI domain, so I've never never needed to do that in x86 land.  It used to be pretty common on PPC "big iron".

My PCI node does not have a reg property but its child nodes.
In x86_of_pci_init() [0] I walk through the PCI child nodes, read the reg
property of each node  which gives me the devfn of the device. I pass this
pci_get_slot() and get the pci_dev struct where I attach the of_node. So
it can by used by the pci driver.

How do I create the PCI device <-> OF node mapping with this? I think your
isa node has this as well. 00008800 is the devfn and I simply forgot the
four blocks of zeros.

[0] http://lkml.org/lkml/2010/11/25/294

Sebastian
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/