Don't export USER_SR if _MODULE is defined.
Add a common <powerpc/vmparam.h> like we have for <powerpc/pmap.h>

Rename PPC_MPC6XX to PPC_OEA (and any mpc6xx reference to oea).

Remove OLDPMAP support.

Use __LDPGSZ (which must be == USRTEXT) as the text address for a.out
executables, and eliminate the USRTEXT constant, which was only used
by the a.out exec code.

switch all mpc6xx powerpc ports to NEWPMAP by default.
the old pmap is still available with the OLDPMAP option.

MAXSLP is defined to be a machine-independent scheduling parameter,
so move it into sys/param.h.

Make the new pmap optional. Use the old (stable!) pmap by default.

Changes new pmap, common param.h, vmparam.h, and moved includes.

Per discussion w/ chuck and chuck, restructure the md page stuff
to use a structure called "vm_page_md", and use __HAVE_VM_PAGE_MD
and __HAVE_PMAP_PHYSSEG.

Add a VM_MDPAGE_MEMBERS macro that defines pmap-specific data for
each vm_page structure. Add a VM_MDPAGE_INIT() macro to init this
data when pages are initialized by UVM. These macros are mandator

Add a VM_MDPAGE_MEMBERS macro that defines pmap-specific data for
each vm_page structure. Add a VM_MDPAGE_INIT() macro to init this
data when pages are initialized by UVM. These macros are mandatory,
but ports may #define them to nothing if they are not needed/used.

This deprecates struct pmap_physseg. As a transitional measure,
allow a port to #define PMAP_PHYSSEG so that it can continue to
use it until its pmap is converted to use VM_MDPAGE_MEMBERS.

Use all this stuff to eliminate a lot of extra work in the Alpha
pmap module (it's smaller and faster now). Changes to other pmap
modules will follow.

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Remove PAGER_MAP_SIZE definition -- use default value. Instead, decrease
VM_MAX_KERNEL_BUF.

Increase all of the limits.

Reduce PAGER_MAP_SIZE to 4MB.

Update for the NKMEMPAGES changes.

CL* discarding.

Add VM_MAX_KERNEL_BUF definition.

Now that we have direct-mapped pool pages, we can garbage-collect VM_MBUF_SIZE
and don't need to allocate mb_map.

VM_MBUF_SIZE is in terms of MCLBYTES, not CLBYTES.

Increase default data size to compile libbfd without `virtual memory
exhausted'. Suggested by Scott Reynolds.

MNN is no longer optional

vm_offset_t --> [pv]addr_t.

Change VM_MAXUSER_ADDRESS to 0x7ffff000.

Add support for UVM and MACHINE_NEW_NONCONTIG.

Initial import of macppc port.