svn commit: r208850 - projects/ppc64/sys/powerpc/include

[M. Warner Losh]

In message: <C9595D21-993D-4B9B-990A-6AF86031F40A at samsco.org>
            Scott Long <scottl at samsco.org> writes: 
: On the specific topic of BUS_SPACE_UNRESTRICTED, that's a definition
: that seems to have been "borrowed" from the bus_space API.  Maybe at
: one time there was a desire to marry bus_space (bus.h) and bus_dma
: together in some fashion, but I don't see that having any practical
: value now.  bus_dma.h and bus.h are separate interfaces and
: shouldn't be sharing definitions, as far as I'm concerned.  If there
: are any disagreements on this, I'm happy to hear them.

busdma started out life as being dependent on bus_space.  Today, it
still depends on bus_addr_t and bus_size_t, etc.
BUS_SPACE_UNRESTRICTED appears to have only ever been used by bus_dma,
and never by bus_space itself.  In fact, the whole family of
BUS_SPACE_MAX{SIZE,ADDR}_{24,32}BIT appear to be MI as well.  And
BUS_SPACE_MAXSIZE is defined wrong for at least amd64....

Warner