non-cached. XXX clean this up by looking at the "non-cacheable" bit of
the full physical address.
avoid having 'nbuf' change between calls to `mdallocsys()' by setting it
in mdallocsys() like the MI allocsys() does. XXX fix this too!
fix some printf lossage.
update for probeget() changes -- though bus_space_probe() appears to be
unused on the sparc64.
device declaration, we don't want it). pull in psycho, pci,
ata and pciide code. clock, eeprom and power attach at sbus
*and* ebus now (clock as `eeprom' works). add `lpt at ebus',
wd major number, and other misc. commented devices.
(`SUNW,sabre') for now, and it doesn't really quite work there yet anyway.
the bus space/dma code is cloned from the sbus driver. the IOMMU code also
is cloned from the sbus code, but separated out into iommu.c so that we can
share it with the sbus driver. hopefully, much of the bus space/dma code
can also be re-shared with the sbus driver and the ebus driver but for now
these copies will do.
support for the real UltraSPARC PCI (`SUNW,psycho') is unwritten, though
most of this code is shared with it.
we can probe PCI config space and try to configue devices, but interrupts
don't work yet...
the bus space/dma code is cloned from the PCI code to do the same thing
which itself was cloned from the sbus bus space/dma code. the bus dma
code is non-functional at this point.
instead of ldstub, but since we aren't doing n-way locking it makes little
difference. N.B. Need to decide what to do with sparc64/sparc64/asm.h which
has name conflicts with sparc64/include/asm.h. So far most of
sparc64/sparc64/asm.h has been moved to ctlreg.h.
has PAGEABLE and INTRSAFE flags. PAGEABLE now really means "pageable",
not "allocate vm_map_entry's from non-static pool", so update all map
creations to reflect that. INTRSAFE maps are maps that are used in
interrupt context (e.g. kmem_map, mb_map), and thus use the static
map entry pool (XXX as does kernel_map, for now). This will eventually
change now these maps are locked, as well.
managed pages, into KVA space. Since the pages are managed, we should
use pmap_enter(), not pmap_kenter_pa().
Also, when entering the mappings, enter with an access_type of
VM_PROT_READ | VM_PROT_WRITE. We do this for a couple of reasons:
(1) On systems that have H/W mod/ref attributes, the hardware
may not be able to track mod/ref done by a bus master.
(2) On systems that have to do mod/ref emulation, this prevents
a mod/ref page fault from potentially happening while in an
interrupt context, which can be problematic.
This latter change is fairly important if we ever want to be able to
transfer DMA-safe memory pages to anonymous memory objects; we will need
to know that the pages are modified, or else data could be lost!
Note that while the pages are unowned (i.e. "just DMA-safe memory pages"),
they won't consume any swap resources, as the mappings are wired, and
the pages aren't on the active or inactive queues.
