XXX This (the m68k FPE, not the glue code) is known to be broken for
68LC040/68040V and 68LC060 cpus. This is also the reason we don't
bother to add options FPU_EMULATE to the DRACO configuration file, as
DraCos only come in 68040V (very few) and 68060 variants.
renamed AUDIO_ENCODING_SLINEAR and AUDIO_ENCODING_LINEAR reverts to the
NetBSD 1.2 sematics. A kernel with COMPAT_12 defined will accept
AUDIO_ENCODING_LINEAR and treat it as before, without COMPAT_12 it
will be rejected.
port, which is lifted from amiga port, plus some changes from me:
- Add support for the HP MMU to the 020/030 bus/address error handler
(mostly lifted wholesale from the old code).
- Rename addrerr and buserr to busaddrerr2030. The new name reflects that
these functions are specific to the 68020 and 68030, and that the same
handler function is used for both vectors.
The vector table is patched once we know our CPU type, before the MMU
is enabled. In the event that we're running on a CPU that we're not
configured for, simply invoke the PROM's "reboot request"; we have no
hope of running in the event of a config botch, since we need working
a working bus error handler for console initialization.
These new functions optimze for common-case page faults, eliminate
many run-time checks, and are sharable.
a global variable (yech, but i'm not out to save the world) which had
the same meaning and ended up being stealthily set in pretty much
the same place.
doing 'if (tag == ...) else if (tag == ...) else panic' rather than
by doing a switch. This makes life easier for people who need
the i386 bus_space_* functions to access spaces other than the normal
memory and I/O spaces, because it allows them to define an i386
bus_space_tag_t as a pointer to a function table, rather than just
an int. (They could define it as an int and cast it to a funtion
table pointer, but I think that's bad karma, and this change doesn't
hurt.)
mark all of 0 -> IOM_BEGIN as used, even though there are some regions
which are left for use by the BIOS (namely, the first 4k page and the
area after biosbasemem*1024 but before IOM_BEGIN). Drivers wishing to
manipulate these areas should map them specially, with _i386_memio_map()
rather than bus_space_map() or i386_memio_map().
disabled even if it's attached. If disabled, ENXIO on open.
(2) in the case where the code32 segment len overflows the I/O hole,
instead of giving up truncate it. (In other words, revert
change (2) in rev 1.21 which i suggested mistakenly.)
(3) map bios data space in the 0->640k range with _i386_memio_map()
rather than with bus_space_map(), so that no accounting checks
are done. The checks which are done to make sure that allocation
in this range is safe are sufficient.
(4) check the return value from _i386_memio_map(), and if it indicates
an error disconnect from the APM BIOS, print an error message,
and return without having marked the device 'enabled'.
functions (which only work on memory and i/o space) to i386_memio_*,
and make bus_space_* in bus.h be #defines which invoke them. This makes
life easier for people who need to define the all of the bus_space functions
so that they work on spaces other than memory and I/O space. Also, add
an _i386_memio_map function which is like i386_memio_map but doesn't do
the extent map checking or allocation. _i386_memio_map and i386_memio_*
are for use only by machine-dependent code.
fvdl