Author: nwhitehorn
Date: Mon Oct 29 14:27:28 2012
New Revision: 242315
URL: http://svn.freebsd.org/changeset/base/242315
Log:
Work around broken device tree on last-generation PowerPC iMacs
(PowerMac12,1), which have a mac-io MPIC cell that indifies itself
as the root PIC despite the actual root PIC being on the northbridge.
No CPC945 systems have a mac-io PIC that does anything so just don't
attach on CPC945 (U4) systems.
MFC after: 3 days
Modified:
head/sys/powerpc/powermac/openpic_macio.c
Modified: head/sys/powerpc/powermac/openpic_macio.c
==============================================================================
--- head/sys/powerpc/powermac/openpic_macio.c Mon Oct 29 14:18:54 2012
(r242314)
+++ head/sys/powerpc/powermac/openpic_macio.c Mon Oct 29 14:27:28 2012
(r242315)
@@ -94,6 +94,10 @@ openpic_macio_probe(device_t dev)
if (strcmp(type, "open-pic") != 0)
return (ENXIO);
+ /* On some U4 systems, there is a phantom MPIC in the mac-io cell */
+ if (OF_finddevice("/u4") != (phandle_t)-1)
+ return (ENXIO);
+
device_set_desc(dev, OPENPIC_DEVSTR);
return (0);
}
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