CVS log for src/sys/arch/hppa/include/pmap.h

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Pull up following revision(s) (requested by skrll in ticket #1467):

	sys/arch/hppa/include/pmap.h: revision 1.41
	sys/arch/hppa/hppa/pmap.c: revision 1.117

port-hppa/56849: Wacko kernel memory accounting in current/hppa

Two fixes:
- Don't include direct mapped memory in pmap statistics
- Decrement pmap statistics counts in pmap_kremove

port-hppa/56849: Wacko kernel memory accounting in current/hppa

Two fixes:
- Don't include direct mapped memory in pmap statistics
- Decrement pmap statistics counts in pmap_kremove

Mostly merge changes from HEAD upto 20200411

Merge changes from current as of 20200406

pmap_remove_all(): Return a boolean value to indicate the behaviour.  If
true, all mappings have been removed, the pmap is totally cleared out, and
UVM can then avoid doing the work to call pmap_remove() for each map entry.
If false, either nothing has been done, or some helpful arch-specific voodoo
has taken place.

Sync with head.

Adjust for UVM locking changes.

Use __BIT()

resync with head

sync with head

switch to __USE_TOPDOWN_VM.
move the stack to the top of the user address space so that
the available free space is more contiguous.

sync with head

merge to -current.

Track if a page has an executable mapping and flush the icache (and
dcache) appropriately.

Fixes the lang/python26 build on my C3700 (PA8700) and chuq's J6700 with
PA8500.

Thanks to chuq for ideas and help with this.

Comment fix.

No need to flush the icache/itlb for pool pages as they're never marked
executable.

Define PMAP_NEED_PROCWR and provide pmap_procwr so that the i-cache is
synchronised with the d-cache appropriately.

Whitespace.

G/C pvh_aliases

Catchup with rmind-uvmplock merge.

Welcome to 5.99.53!  Merge rmind-uvmplock branch:

- Reorganize locking in UVM and provide extra serialisation for pmap(9).
  New lock order: [vmpage-owner-lock] -> pmap-lock.

- Simplify locking in some pmap(9) modules by removing P->V locking.

- Use lock object on vmobjlock (and thus vnode_t::v_interlock) to share
  the locks amongst UVM objects where necessary (tmpfs, layerfs, unionfs).

- Rewrite and optimise x86 TLB shootdown code, make it simpler and cleaner.
  Add TLBSTATS option for x86 to collect statistics about TLB shootdowns.

- Unify /dev/mem et al in MI code and provide required locking (removes
  kernel-lock on some ports).  Also, avoid cache-aliasing issues.

Thanks to Andrew Doran and Joerg Sonnenberger, as their initial patches
formed the core changes of this branch.

Drop per-page locking i.e. pvh_lock and rely on locking provided by
upper layer, UVM.  Sprinkle asserts.

sync with head

Sync with HEAD.

Move struct vm_page_md definition from vmparam.h to pmap.h, because
it's used only by pmap.  vmparam.h has definitions for wider
audience.

All GENERIC kernels build tested, except ia64.

powerpc/include/booke/vmparam.h has one too, but it has no pmap.h,
so it's left as is.

Sync with HEAD.

sync with head.

Turn PMAP_NOCACHE into MI flag.
Add MI flags PMAP_WRITE_COMBINE, PMAP_WRITE_BACK, PMAP_NOCACHE_OVR.
Update pmap(9) manpage.

hppa: Remove MD PMAP_NOCACHE flag as it exists as MI flag
mips: Rename MD PMAP_NOCACHE to PGC_NOCACHE.

x86: Implement new MI flags using Page-Attribute Tables.
x86: Implement BUS_SPACE_MAP_PREFETCHABLE.

Patch presented on tech-kern@:
http://mail-index.netbsd.org/tech-kern/2010/06/30/msg008458.html

No comments on this last version.

sync with head

Allow PVF_UNCACHEABLE in set/clear of pmap_changebit call (for now).

sync with head

Sync with HEAD.

Not all PA CPUs have the U-bit (uncacheable) for non-IO memory.  In fact
most don't.  Deal with non-equivalent aliases by removing and flushing the
managed mappings, and flushing the unmanaged mappings.

When flushing caches/TLB flush the cache before purging the TLB just in
case the flush enters the mapping into the TLB.

Change struct uvm_object::vmobjlock to be dynamically allocated with
mutex_obj_alloc().  It allows us to share the locks among UVM objects.

sync with head

Add #include "opt_cputype.h" where necessary.

Use VM_PAGE_TO_MD().  Only compile tested.

Deal with PA2.0 cache move-in rules by purging the TLB as well as
flushing/purging the cache.

Put PMAP_NOCACHE in the MD space.

Use the new flags argument to pmap_kenter_pa for PMAP_NOCACHE.

sync with head

u_intNN_t -> uintNN_t

"same" code before and after.

Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.

sync with head.

Remove if defined(HP7100LC_CPU) || defined(HP7300LC_CPU) from around
pmap_hptsize and pdc_hwtlb (for now).

Move HPPA_SID_KERNEL into pmap.h and deal with the move.

Merge nick-hppapmap.

This is a port of the OpenBSD pmap and trap handling code to get us

        - Performance boost on some/all machines.
        - Well on the way to PA2.0 (in 32bit mode) support. Several
          machines probe hardware, but fail sometime after interrupts
          are enabled.

Other things changed / fixed on the branch are

        - update autoconf to use the OpenBSD code.
        - com @ dino is very close to being supported.
        - HPPA_REDZONE has been replaced with a working redzone which
          is enabled with DIAGNOSTIC.
        - UPAGES has been halved in size.
        - power(4) from OpenBSD to fix a few bugs.
        - updated list of modules from OpenBSD.
	- initial ports of uturn(4), astro(4) and elroy(4).
	- update some copyrights (remove advertising clause, etc.)

Thanks to mjf for some of the above, testing and listening.

Track unmanaged mappings to deal with loaning and non-equivalient aliases.

-extern struct pmap kernel_pmap_store;

Handle non-equivalent aliases.

Thanks to mjf for help with this.

Add some defines for attributes of pages or mappings of pages

Be careful not to PMAP_UNMAP_POOLPAGE and leave cache aliases.

Sync with HEAD.

Sync with HEAD.

Update haad-dm branch to haad-dm-base2.

Make pmap_kernel() a MI macro for struct pmap *kernel_pmap_ptr,
which is now the "API" provided by the pmap module.  pmap_kernel()
remains as the syntactic sugar.

Bonus cosmetics round: move all the pmap_t pointer typedefs into
uvm_pmap.h.

Thanks to Greg Oster for providing cpu muscle for doing test builds.

Back out my previous change. PMAP_NC is blatantly used, which means I
just broke the build.

Delete PMAP_NC because it's never used. To mark a vmpage as uncacheable
we use pmap_pvh_attrs(TLB_UNCACHEABLE) instead.

Whirespace.

Add PMAP_{,UN}MAP_POOLPAGE

Restore PMAP_NC

G/C some old stuff.

Commit work in progress.

Sync with HEAD.

sync with head

sync with HEAD

Sync with HEAD

include sys/simplelock.h

sync with HEAD

Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree.  Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches.  The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

Sync with HEAD

sync with head.

Sync with head.

Like I said - don't futz with the trapframe in pmap_activate. Instead
update the trapframe space and protection register in cpu_lwp_fork and
setregs.

Sync with head.

Sync with head.

Update to HEAD.

pmap_activate shouldn't play with the trap frame - especially not now it's
called by the MI code.

Implement a way of tracking the vmspace allocated to a process and its
LWPs so that if it changes underneath us we can correct the space id in
the trapframe in pmap_activate for now.

An example of when this happens is vfork/exec.

An exec hook is probably the way to go.

sync with head.

Sync with head.

de-__P()

s/lwp/l/ for argument name in pmap_deactivate.

sync with head

Sync with head.

sync with head.

Change "inline" back to "__inline" in .h files -- C99 is still too
new, and some apps compile things in C89 mode. C89 keywords stay.

As per core@.

Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

sync with -current

Sync with HEAD.

Convert the PMAP_PREFER() macro from two arguments (offset and hint)
to four (adding size and direction).

In order for topdown uvm to be an option on ports using PMAP_PREFER,
they will need to "prefer" lower addresses if topdown is being used.
Additionally, at least one port also needs to know the size.

Sync with HEAD

add hppa support for RAS, context stuff, siginfo and scheduler activations:
 - add a RAS hook in cpu_switch().
 - fill in the definition of struct mcontext.
 - implement cpu_upcall(), cpu_getmcontext(), cpu_getmcontext() and
   cpu_switchto().
 - for now, force the right priviledge bits and space regs in setcontext().
 - use correct values for __SIMPLELOCK_*.
 - move the user stack to start at a multiple of the pthread stack size
   so that libpthread can use the sp-masking trick.

convert pmap_deactivate() from a macro to an inline function
so that the kernel builds again.

add a PMAP_NC flag for pmap_kenter_pa() to specific a non-cached mapping.
use this in mbus_dmamem_map() to fix corruption of DMA memory.
note that this TLB bit is ignored on some CPUs (PA7100 and probably
others of that era), so this doesn't fix the problem in general,
but it does work on newer models and will make things easier later.

update for LWPs, and some lite cleanup.

sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work

it really helps to get the stub right before cutting + pasting it 27 times.
alas, I did not.  doh.

add pmap_remove_all() hook (empty on most platforms so far).

catch up with -current.

catch up with -current on kqueue branch

file pmap.h was added on branch gehenna-devsw on 2002-07-14 17:47:29 +0000

file pmap.h was added on branch kqueue on 2002-06-23 17:37:09 +0000

Added files to support generic HP PA-RISC based machines.  hp700-specific
files to follow.