- expose vmparams to userland on arm, like other archs do.
- remove unneeded includes

branches: 1.30.4;
ISA exists on more that just shark. Fix a comment about this.

Use default PAGER_MAP_DEFAULT_SIZE for ARM and PowerPC, exception
acorn26. This bumps the KVA reservation from 4MB to 16MB and avoids
long hangs on my Cubietruck under IO. acorn26 is kept as it does have a
ridiculous low 32MB KVA limit.

branches: 1.28.2; 1.28.16;
expose more for kmemuser/fix include protection

branches: 1.27.8; 1.27.12;
Remove incomplete, never worked dynamic run-time memory registration
(uvm_page_physload(9)). This functionality will be re-added later.

branches: 1.26.40; 1.26.42;
defparam PAGER_MAP_SIZE.

branches: 1.25.30; 1.25.46; 1.25.48; 1.25.50; 1.25.52; 1.25.56;
merge ktrace-lwp.

branches: 1.24.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.23.2;
Move KERNEL_VM_SIZE into the C files where its used.

Use virtual_avail and virtual_end to compute the size of the available
kernel VM space for VM_MAX_KERNEL_BUF, and move the definition into
generic ARM code.

Move KERNEL_VM_BASE inside where it is used (it won't be there for long).

Don't expose KERNEL_TEXT_BASE outside of board-specific code. This gives
individual board start-up code more flexibility about where the kernel
starts in the kernel address space.

Remove old pmap support for platforms which have fully switched over.

Don't define APTE_BASE if ARM32_PMAP_NEW is defined; the new pmap
doesn't use it.

Use PAGE_SIZE rather than NBPG.

Back out previous; it breaks binary compatibility between platforms
in the same MACHINE_ARCH.

Move some #defines out of _KERNEL.

Back out last change, following jason's advice, it's lsof that's actually
broken not the headers.

Allow userland to see machine/vmparam.h. This allows ntop to compile, as it uses the struct uvm from uvm.h, which need the VM_NFREELIST definition.

Of course this does mean that ntop could potentially be platform specific, ie different versions for cats, acorn32 etc as struct uvm maybe a different size, but running on the same cpu architecture.

branches: 1.12.2;
cats has enough kvm space to use the default pager_map size.

* Change all uses of KERNEL_SPACE_START to KERNEL_BASE.
* Delete now unused KERNEL_SPACE_START.

Define KERNEL_TEXT_BASE, APTE_BASE, and KERNEL_VM_BASE in terms of
KERNEL_BASE.

* Rename PROCESS_PAGE_TBLS_BASE -> PTE_BASE
* Rename ALT_PAGE_TBLS_BASE -> APTE_BASE
* Garbage-collect PAGE_TABLE_SPACE_START

Implement pmap_growkernel for arm32 based ports.
Note that this has been compiled on some systems, cats, IQ80310, IPAQ, netwinder and shark (note that shark's build is currently broken due to other reasons), but only actually run on cats.
Shark doesn't make use of the functionality as I believe there has to be a correlation between OFW and the kernel tables so that calls into OFW work.

Move even more constants into the shared 32-bit vmparam.h header.
Cleanup elsewhere will have to be done before we can sanitize this
header any further.

- Move more contents of various <machine/vmparam.h> files into
<arm/arm32/vmparam.h> (mostly the stuff that's tied to the pmap
implementation).
- Since the MMU definitions in pte.h are specific to ARM processors
that support 32-bit mode, move pte.h to <arm/arm32/pte.h>.
- Make the Netwinder startup file build again (use PT_B|PT_C, rather
than PT_CACHEABLE, since the latter expands to a variable these days).

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

branches: 1.4.2;
Pull in common 32-bit ARM VM parameters.

branches: 1.3.4;
Checking a whole host of pmap changes:
Improved locking (not that we actually use it on a uniprocessor, but one day :)
Removed unneeded splvm's
tweaked pmap_clean_page code to only flush the cache if the page is mapped in the current pmap (based on diff from richard E)
Adopted pv entry allocation mechanism from i386.
Laid framework for returning ptp's when we've finished with them rather than holding onto them till the process exits.
ptp's are now allocated with a uvm object for the pmap, means that we can walk a list to free them off in pmap_release, until they get freed off by pmap_remove.

Also implemented a page zeroing function when the processor is idling. Note that hpcarm may wish to disable this.

I believe this code to be stable, if anyone has any problems please shout up.

branches: 1.2.2;
Update vmparam.h to just have the cats value for KERNEL_VM_SIZE.

As noted by Robert Swindells.

Finish off the cats arch dir by creating an include dir and populating it from
arm32/include.
Make use of std.cats in the kernel config.

Fixup files.cats so it actually works.