[Bug 207998] Panic during boot on Sparc64 11-CURRENT (r296811)

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Tue Mar 15 01:28:40 UTC 2016


--- Comment #1 from dal36 at gmx.co.uk ---
Further to my original report, replacing BUS_SPACE_MAXADDR with ~0ULL in line
236 of head/sys/sparc64/sparc64/nexus.c (i.e. part reversal of r296250) gives a
kernel which boots.

Looking in more detail, head/sys/sparc64/include/bus.h defines
BUS_SPACE_MAXADDR as 0xFFFFFFFF, rather than ~0ULL, hence the change in
behaviour. I've noticed that this seems to differ from some of the other 64 bit
architectures (e.g. arm64 and powerpc64), which have 0xFFFFFFFFFFFFFFFFUL, but
I don't know whether this is just as expected.

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