Date: Thu, 12 Sep 2013 10:07:18 -0500 From: Nathan Whitehorn <nwhitehorn@freebsd.org> To: freebsd-ppc@freebsd.org, freebsd-arm@freebsd.org, freebsd-sparc64 <freebsd-sparc64@freebsd.org> Subject: Re: Patch for Cross-Reference Phandles Message-ID: <5231D8A6.9080501@freebsd.org> In-Reply-To: <522CC7E0.9060508@freebsd.org> References: <522CC7E0.9060508@freebsd.org>
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On 09/08/13 13:54, Nathan Whitehorn wrote: > Open Firmware has three namespaces for handles: > 1. Instance handles, for open devices > 2. Package handles for the client interface > 3. Package handles for device tree cross references > > On Powermac hardware, we assume that (2) and (3) are identical and > call both phandles. On embedded FDT systems, you can't open devices > and so we abuse ihandle_t for (3). IBM pSeries hardware, however, has > all three things. With that in mind, I'd like to start separating > them. The patch at > http://people.freebsd.org/~nwhitehorn/xref_phandle.diff adds a new > function (OF_child_xref_phandle) that takes a phandle of type (3) and > turns into one of type (2) by searching for entries named "phandle", > "ibm,phandle", or "linux,phandle" in the tree. This should work for > FDT as well, but is not connected in the patch to anything actually > FDT related. > > Comments would be appreciated. I'd like to get to get this as in as > soon as possible (given the HEAD freeze) otherwise. > -Nathan Since I haven't heard anything, it shouldn't affect any existing platforms or code, and it would be nice to have this interface available in the 10.x series, I plan to ask re@ for commit approval tomorrow. Please let me know if there are any objections. -Nathan
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