 @@ -1,1214 +1,1214 @@
-/*	$NetBSD: pmap.c,v 1.187 2008/09/28 21:27:11 skrll Exp $	*/
+/*	$NetBSD: pmap.c,v 1.187.4.1 2009/12/03 09:26:59 sborrill Exp $	*/
 /*
  * Copyright 2003 Wasabi Systems, Inc.
  * All rights reserved.
+ *
  * Written by Steve C. Woodford for Wasabi Systems, Inc.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. All advertising materials mentioning features or use of this software
  *    must display the following acknowledgement:
  *      This product includes software developed for the NetBSD Project by
  *      Wasabi Systems, Inc.
  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  *    or promote products derived from this software without specific prior
  *    written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 /*
  * Copyright (c) 2002-2003 Wasabi Systems, Inc.
  * Copyright (c) 2001 Richard Earnshaw
  * Copyright (c) 2001-2002 Christopher Gilbert
  * All rights reserved.
+ *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. The name of the company nor the name of the author may be used to
  *    endorse or promote products derived from this software without specific
  *    prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 /*-
  * Copyright (c) 1999 The NetBSD Foundation, Inc.
  * All rights reserved.
+ *
  * This code is derived from software contributed to The NetBSD Foundation
  * by Charles M. Hannum.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 /*
  * Copyright (c) 1994-1998 Mark Brinicombe.
  * Copyright (c) 1994 Brini.
  * All rights reserved.
+ *
  * This code is derived from software written for Brini by Mark Brinicombe
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. All advertising materials mentioning features or use of this software
  *    must display the following acknowledgement:
  *	This product includes software developed by Mark Brinicombe.
  * 4. The name of the author may not be used to endorse or promote products
  *    derived from this software without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *
  * RiscBSD kernel project
+ *
  * pmap.c
+ *
  * Machine dependant vm stuff
+ *
  * Created      : 20/09/94
  */
 /*
  * armv6 and VIPT cache support by 3am Software Foundry,
  * Copyright (c) 2007 Microsoft
  */
 /*
  * Performance improvements, UVM changes, overhauls and part-rewrites
  * were contributed by Neil A. Carson <neil@causality.com>.
  */
 /*
  * Overhauled again to speedup the pmap, use MMU Domains so that L1 tables
  * can be shared, and re-work the KVM layout, by Steve Woodford of Wasabi
  * Systems, Inc.
+ *
  * There are still a few things outstanding at this time:
+ *
  *   - There are some unresolved issues for MP systems:
+ *
  *     o The L1 metadata needs a lock, or more specifically, some places
  *       need to acquire an exclusive lock when modifying L1 translation
  *       table entries.
+ *
  *     o When one cpu modifies an L1 entry, and that L1 table is also
  *       being used by another cpu, then the latter will need to be told
  *       that a tlb invalidation may be necessary. (But only if the old
  *       domain number in the L1 entry being over-written is currently
  *       the active domain on that cpu). I guess there are lots more tlb
  *       shootdown issues too...
+ *
  *     o If the vector_page is at 0x00000000 instead of 0xffff0000, then
  *       MP systems will lose big-time because of the MMU domain hack.
  *       The only way this can be solved (apart from moving the vector
  *       page to 0xffff0000) is to reserve the first 1MB of user address
  *       space for kernel use only. This would require re-linking all
  *       applications so that the text section starts above this 1MB
  *       boundary.
+ *
  *     o Tracking which VM space is resident in the cache/tlb has not yet
  *       been implemented for MP systems.
+ *
  *     o Finally, there is a pathological condition where two cpus running
  *       two separate processes (not lwps) which happen to share an L1
  *       can get into a fight over one or more L1 entries. This will result
  *       in a significant slow-down if both processes are in tight loops.
  */
 /*
  * Special compilation symbols
  * PMAP_DEBUG		- Build in pmap_debug_level code
  */
 /* Include header files */
 #include "opt_cpuoptions.h"
 #include "opt_pmap_debug.h"
 #include "opt_ddb.h"
 #include "opt_lockdebug.h"
 #include "opt_multiprocessor.h"
 #include <sys/param.h>
 #include <sys/types.h>
 #include <sys/kernel.h>
 #include <sys/systm.h>
 #include <sys/proc.h>
 #include <sys/malloc.h>
 #include <sys/user.h>
 #include <sys/pool.h>
 #include <sys/cdefs.h>
 #include <sys/cpu.h>
 #include <sys/sysctl.h>
 #include <uvm/uvm.h>
 #include <machine/bus.h>
 #include <machine/pmap.h>
 #include <machine/pcb.h>
 #include <machine/param.h>
 #include <arm/arm32/katelib.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.187 2008/09/28 21:27:11 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.187.4.1 2009/12/03 09:26:59 sborrill Exp $");
 #ifdef PMAP_DEBUG
 /* XXX need to get rid of all refs to this */
 int pmap_debug_level = 0;
 /*
  * for switching to potentially finer grained debugging
  */
 #define	PDB_FOLLOW	0x0001
 #define	PDB_INIT	0x0002
 #define	PDB_ENTER	0x0004
 #define	PDB_REMOVE	0x0008
 #define	PDB_CREATE	0x0010
 #define	PDB_PTPAGE	0x0020
 #define	PDB_GROWKERN	0x0040
 #define	PDB_BITS	0x0080
 #define	PDB_COLLECT	0x0100
 #define	PDB_PROTECT	0x0200
 #define	PDB_MAP_L1	0x0400
 #define	PDB_BOOTSTRAP	0x1000
 #define	PDB_PARANOIA	0x2000
 #define	PDB_WIRING	0x4000
 #define	PDB_PVDUMP	0x8000
 #define	PDB_VAC		0x10000
 #define	PDB_KENTER	0x20000
 #define	PDB_KREMOVE	0x40000
 #define	PDB_EXEC	0x80000
 int debugmap = 1;
 int pmapdebug = 0;
 #define	NPDEBUG(_lev_,_stat_) \
 	if (pmapdebug & (_lev_)) \
         	((_stat_))
 #else	/* PMAP_DEBUG */
 #define NPDEBUG(_lev_,_stat_) /* Nothing */
 #endif	/* PMAP_DEBUG */
 /*
  * pmap_kernel() points here
  */
 struct pmap     kernel_pmap_store;
 /*
  * Which pmap is currently 'live' in the cache
+ *
  * XXXSCW: Fix for SMP ...
  */
 static pmap_t pmap_recent_user;
 /*
  * Pointer to last active lwp, or NULL if it exited.
  */
 struct lwp *pmap_previous_active_lwp;
 /*
  * Pool and cache that pmap structures are allocated from.
  * We use a cache to avoid clearing the pm_l2[] array (1KB)
  * in pmap_create().
  */
 static struct pool_cache pmap_cache;
 static LIST_HEAD(, pmap) pmap_pmaps;
 /*
  * Pool of PV structures
  */
 static struct pool pmap_pv_pool;
 static void *pmap_bootstrap_pv_page_alloc(struct pool *, int);
 static void pmap_bootstrap_pv_page_free(struct pool *, void *);
 static struct pool_allocator pmap_bootstrap_pv_allocator = {
 	pmap_bootstrap_pv_page_alloc, pmap_bootstrap_pv_page_free
 };
 /*
  * Pool and cache of l2_dtable structures.
  * We use a cache to avoid clearing the structures when they're
  * allocated. (196 bytes)
  */
 static struct pool_cache pmap_l2dtable_cache;
 static vaddr_t pmap_kernel_l2dtable_kva;
 /*
  * Pool and cache of L2 page descriptors.
  * We use a cache to avoid clearing the descriptor table
  * when they're allocated. (1KB)
  */
 static struct pool_cache pmap_l2ptp_cache;
 static vaddr_t pmap_kernel_l2ptp_kva;
 static paddr_t pmap_kernel_l2ptp_phys;
 #ifdef PMAPCOUNTERS
 #define	PMAP_EVCNT_INITIALIZER(name) \
 	EVCNT_INITIALIZER(EVCNT_TYPE_MISC, NULL, "pmap", name)
 #ifdef PMAP_CACHE_VIPT
 static struct evcnt pmap_ev_vac_color_new =
    PMAP_EVCNT_INITIALIZER("new page color");
 static struct evcnt pmap_ev_vac_color_reuse =
    PMAP_EVCNT_INITIALIZER("ok first page color");
 static struct evcnt pmap_ev_vac_color_ok =
    PMAP_EVCNT_INITIALIZER("ok page color");
 static struct evcnt pmap_ev_vac_color_blind =
    PMAP_EVCNT_INITIALIZER("blind page color");
 static struct evcnt pmap_ev_vac_color_change =
    PMAP_EVCNT_INITIALIZER("change page color");
 static struct evcnt pmap_ev_vac_color_erase =
    PMAP_EVCNT_INITIALIZER("erase page color");
 static struct evcnt pmap_ev_vac_color_none =
    PMAP_EVCNT_INITIALIZER("no page color");
 static struct evcnt pmap_ev_vac_color_restore =
    PMAP_EVCNT_INITIALIZER("restore page color");
 EVCNT_ATTACH_STATIC(pmap_ev_vac_color_new);
 EVCNT_ATTACH_STATIC(pmap_ev_vac_color_reuse);
 EVCNT_ATTACH_STATIC(pmap_ev_vac_color_ok);
 EVCNT_ATTACH_STATIC(pmap_ev_vac_color_blind);
 EVCNT_ATTACH_STATIC(pmap_ev_vac_color_change);
 EVCNT_ATTACH_STATIC(pmap_ev_vac_color_erase);
 EVCNT_ATTACH_STATIC(pmap_ev_vac_color_none);
 EVCNT_ATTACH_STATIC(pmap_ev_vac_color_restore);
 #endif
 static struct evcnt pmap_ev_mappings =
    PMAP_EVCNT_INITIALIZER("pages mapped");
 static struct evcnt pmap_ev_unmappings =
    PMAP_EVCNT_INITIALIZER("pages unmapped");
 static struct evcnt pmap_ev_remappings =
    PMAP_EVCNT_INITIALIZER("pages remapped");
 EVCNT_ATTACH_STATIC(pmap_ev_mappings);
 EVCNT_ATTACH_STATIC(pmap_ev_unmappings);
 EVCNT_ATTACH_STATIC(pmap_ev_remappings);
 static struct evcnt pmap_ev_kernel_mappings =
    PMAP_EVCNT_INITIALIZER("kernel pages mapped");
 static struct evcnt pmap_ev_kernel_unmappings =
    PMAP_EVCNT_INITIALIZER("kernel pages unmapped");
 static struct evcnt pmap_ev_kernel_remappings =
    PMAP_EVCNT_INITIALIZER("kernel pages remapped");
 EVCNT_ATTACH_STATIC(pmap_ev_kernel_mappings);
 EVCNT_ATTACH_STATIC(pmap_ev_kernel_unmappings);
 EVCNT_ATTACH_STATIC(pmap_ev_kernel_remappings);
 static struct evcnt pmap_ev_kenter_mappings =
    PMAP_EVCNT_INITIALIZER("kenter pages mapped");
 static struct evcnt pmap_ev_kenter_unmappings =
    PMAP_EVCNT_INITIALIZER("kenter pages unmapped");
 static struct evcnt pmap_ev_kenter_remappings =
    PMAP_EVCNT_INITIALIZER("kenter pages remapped");
 static struct evcnt pmap_ev_pt_mappings =
    PMAP_EVCNT_INITIALIZER("page table pages mapped");
 EVCNT_ATTACH_STATIC(pmap_ev_kenter_mappings);
 EVCNT_ATTACH_STATIC(pmap_ev_kenter_unmappings);
 EVCNT_ATTACH_STATIC(pmap_ev_kenter_remappings);
 EVCNT_ATTACH_STATIC(pmap_ev_pt_mappings);
 #ifdef PMAP_CACHE_VIPT
 static struct evcnt pmap_ev_exec_mappings =
    PMAP_EVCNT_INITIALIZER("exec pages mapped");
 static struct evcnt pmap_ev_exec_cached =
    PMAP_EVCNT_INITIALIZER("exec pages cached");
 EVCNT_ATTACH_STATIC(pmap_ev_exec_mappings);
 EVCNT_ATTACH_STATIC(pmap_ev_exec_cached);
 static struct evcnt pmap_ev_exec_synced =
    PMAP_EVCNT_INITIALIZER("exec pages synced");
 static struct evcnt pmap_ev_exec_synced_map =
    PMAP_EVCNT_INITIALIZER("exec pages synced (MP)");
 static struct evcnt pmap_ev_exec_synced_unmap =
    PMAP_EVCNT_INITIALIZER("exec pages synced (UM)");
 static struct evcnt pmap_ev_exec_synced_remap =
    PMAP_EVCNT_INITIALIZER("exec pages synced (RM)");
 static struct evcnt pmap_ev_exec_synced_clearbit =
    PMAP_EVCNT_INITIALIZER("exec pages synced (DG)");
 static struct evcnt pmap_ev_exec_synced_kremove =
    PMAP_EVCNT_INITIALIZER("exec pages synced (KU)");
 EVCNT_ATTACH_STATIC(pmap_ev_exec_synced);
 EVCNT_ATTACH_STATIC(pmap_ev_exec_synced_map);
 EVCNT_ATTACH_STATIC(pmap_ev_exec_synced_unmap);
 EVCNT_ATTACH_STATIC(pmap_ev_exec_synced_remap);
 EVCNT_ATTACH_STATIC(pmap_ev_exec_synced_clearbit);
 EVCNT_ATTACH_STATIC(pmap_ev_exec_synced_kremove);
 static struct evcnt pmap_ev_exec_discarded_unmap =
    PMAP_EVCNT_INITIALIZER("exec pages discarded (UM)");
 static struct evcnt pmap_ev_exec_discarded_zero =
    PMAP_EVCNT_INITIALIZER("exec pages discarded (ZP)");
 static struct evcnt pmap_ev_exec_discarded_copy =
    PMAP_EVCNT_INITIALIZER("exec pages discarded (CP)");
 static struct evcnt pmap_ev_exec_discarded_page_protect =
    PMAP_EVCNT_INITIALIZER("exec pages discarded (PP)");
 static struct evcnt pmap_ev_exec_discarded_clearbit =
    PMAP_EVCNT_INITIALIZER("exec pages discarded (DG)");
 static struct evcnt pmap_ev_exec_discarded_kremove =
    PMAP_EVCNT_INITIALIZER("exec pages discarded (KU)");
 EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_unmap);
 EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_zero);
 EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_copy);
 EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_page_protect);
 EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_clearbit);
 EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_kremove);
 #endif /* PMAP_CACHE_VIPT */
 static struct evcnt pmap_ev_updates = PMAP_EVCNT_INITIALIZER("updates");
 static struct evcnt pmap_ev_collects = PMAP_EVCNT_INITIALIZER("collects");
 static struct evcnt pmap_ev_activations = PMAP_EVCNT_INITIALIZER("activations");
 EVCNT_ATTACH_STATIC(pmap_ev_updates);
 EVCNT_ATTACH_STATIC(pmap_ev_collects);
 EVCNT_ATTACH_STATIC(pmap_ev_activations);
 #define	PMAPCOUNT(x)	((void)(pmap_ev_##x.ev_count++))
 #else
 #define	PMAPCOUNT(x)	((void)0)
 #endif
 /*
  * pmap copy/zero page, and mem(5) hook point
  */
 static pt_entry_t *csrc_pte, *cdst_pte;
 static vaddr_t csrcp, cdstp;
 vaddr_t memhook;			/* used by mem.c */
 extern void *msgbufaddr;
 int pmap_kmpages;
 /*
  * Flag to indicate if pmap_init() has done its thing
  */
 bool pmap_initialized;
 /*
  * Misc. locking data structures
  */
 #if 0 /* defined(MULTIPROCESSOR) || defined(LOCKDEBUG) */
 static struct lock pmap_main_lock;
 #define PMAP_MAP_TO_HEAD_LOCK() \
      (void) spinlockmgr(&pmap_main_lock, LK_SHARED, NULL)
 #define PMAP_MAP_TO_HEAD_UNLOCK() \
      (void) spinlockmgr(&pmap_main_lock, LK_RELEASE, NULL)
 #define PMAP_HEAD_TO_MAP_LOCK() \
      (void) spinlockmgr(&pmap_main_lock, LK_EXCLUSIVE, NULL)
 #define PMAP_HEAD_TO_MAP_UNLOCK() \
      spinlockmgr(&pmap_main_lock, LK_RELEASE, (void *) 0)
 #else
 #define PMAP_MAP_TO_HEAD_LOCK()		/* null */
 #define PMAP_MAP_TO_HEAD_UNLOCK()	/* null */
 #define PMAP_HEAD_TO_MAP_LOCK()		/* null */
 #define PMAP_HEAD_TO_MAP_UNLOCK()	/* null */
 #endif
 #define	pmap_acquire_pmap_lock(pm)			\
 	do {						\
 		if ((pm) != pmap_kernel())		\
 			mutex_enter(&(pm)->pm_lock);	\
 	} while (/*CONSTCOND*/0)
 #define	pmap_release_pmap_lock(pm)			\
 	do {						\
 		if ((pm) != pmap_kernel())		\
 			mutex_exit(&(pm)->pm_lock);	\
 	} while (/*CONSTCOND*/0)
 /*
  * Metadata for L1 translation tables.
  */
 struct l1_ttable {
 	/* Entry on the L1 Table list */
 	SLIST_ENTRY(l1_ttable) l1_link;
 	/* Entry on the L1 Least Recently Used list */
 	TAILQ_ENTRY(l1_ttable) l1_lru;
 	/* Track how many domains are allocated from this L1 */
 	volatile u_int l1_domain_use_count;
 	/*
 	 * A free-list of domain numbers for this L1.
 	 * We avoid using ffs() and a bitmap to track domains since ffs()
 	 * is slow on ARM.
 	 */
 	u_int8_t l1_domain_first;
 	u_int8_t l1_domain_free[PMAP_DOMAINS];
 	/* Physical address of this L1 page table */
 	paddr_t l1_physaddr;
 	/* KVA of this L1 page table */
 	pd_entry_t *l1_kva;
 };
 /*
  * Convert a virtual address into its L1 table index. That is, the
  * index used to locate the L2 descriptor table pointer in an L1 table.
  * This is basically used to index l1->l1_kva[].
+ *
  * Each L2 descriptor table represents 1MB of VA space.
  */
 #define	L1_IDX(va)		(((vaddr_t)(va)) >> L1_S_SHIFT)
 /*
  * L1 Page Tables are tracked using a Least Recently Used list.
  *  - New L1s are allocated from the HEAD.
  *  - Freed L1s are added to the TAIl.
  *  - Recently accessed L1s (where an 'access' is some change to one of
  *    the userland pmaps which owns this L1) are moved to the TAIL.
  */
 static TAILQ_HEAD(, l1_ttable) l1_lru_list;
 static struct simplelock l1_lru_lock;
 /*
  * A list of all L1 tables
  */
 static SLIST_HEAD(, l1_ttable) l1_list;
 /*
  * The l2_dtable tracks L2_BUCKET_SIZE worth of L1 slots.
+ *
  * This is normally 16MB worth L2 page descriptors for any given pmap.
  * Reference counts are maintained for L2 descriptors so they can be
  * freed when empty.
  */
 struct l2_dtable {
 	/* The number of L2 page descriptors allocated to this l2_dtable */
 	u_int l2_occupancy;
 	/* List of L2 page descriptors */
 	struct l2_bucket {
 		pt_entry_t *l2b_kva;	/* KVA of L2 Descriptor Table */
 		paddr_t l2b_phys;	/* Physical address of same */
 		u_short l2b_l1idx;	/* This L2 table's L1 index */
 		u_short l2b_occupancy;	/* How many active descriptors */
 	} l2_bucket[L2_BUCKET_SIZE];
 };
 /*
  * Given an L1 table index, calculate the corresponding l2_dtable index
  * and bucket index within the l2_dtable.
  */
 #define	L2_IDX(l1idx)		(((l1idx) >> L2_BUCKET_LOG2) & \
 				 (L2_SIZE - 1))
 #define	L2_BUCKET(l1idx)	((l1idx) & (L2_BUCKET_SIZE - 1))
 /*
  * Given a virtual address, this macro returns the
  * virtual address required to drop into the next L2 bucket.
  */
 #define	L2_NEXT_BUCKET(va)	(((va) & L1_S_FRAME) + L1_S_SIZE)
 /*
  * L2 allocation.
  */
 #define	pmap_alloc_l2_dtable()		\
 	    pool_cache_get(&pmap_l2dtable_cache, PR_NOWAIT)
 #define	pmap_free_l2_dtable(l2)		\
 	    pool_cache_put(&pmap_l2dtable_cache, (l2))
 #define pmap_alloc_l2_ptp(pap)		\
 	    ((pt_entry_t *)pool_cache_get_paddr(&pmap_l2ptp_cache,\
 	    PR_NOWAIT, (pap)))
 /*
  * We try to map the page tables write-through, if possible.  However, not
  * all CPUs have a write-through cache mode, so on those we have to sync
  * the cache when we frob page tables.
+ *
  * We try to evaluate this at compile time, if possible.  However, it's
  * not always possible to do that, hence this run-time var.
  */
 int	pmap_needs_pte_sync;
 /*
  * Real definition of pv_entry.
  */
 struct pv_entry {
 	SLIST_ENTRY(pv_entry) pv_link;	/* next pv_entry */
 	pmap_t		pv_pmap;        /* pmap where mapping lies */
 	vaddr_t		pv_va;          /* virtual address for mapping */
 	u_int		pv_flags;       /* flags */
 };
 /*
  * Macro to determine if a mapping might be resident in the
  * instruction cache and/or TLB
  */
 #define	PV_BEEN_EXECD(f)  (((f) & (PVF_REF | PVF_EXEC)) == (PVF_REF | PVF_EXEC))
 #define	PV_IS_EXEC_P(f)   (((f) & PVF_EXEC) != 0)
 /*
  * Macro to determine if a mapping might be resident in the
  * data cache and/or TLB
  */
 #define	PV_BEEN_REFD(f)   (((f) & PVF_REF) != 0)
 /*
  * Local prototypes
  */
 static int		pmap_set_pt_cache_mode(pd_entry_t *, vaddr_t);
 static void		pmap_alloc_specials(vaddr_t *, int, vaddr_t *,
 			    pt_entry_t **);
 static bool		pmap_is_current(pmap_t);
 static bool		pmap_is_cached(pmap_t);
 static void		pmap_enter_pv(struct vm_page *, struct pv_entry *,
 			    pmap_t, vaddr_t, u_int);
 static struct pv_entry *pmap_find_pv(struct vm_page *, pmap_t, vaddr_t);
 static struct pv_entry *pmap_remove_pv(struct vm_page *, pmap_t, vaddr_t, int);
 static u_int		pmap_modify_pv(struct vm_page *, pmap_t, vaddr_t,
 			    u_int, u_int);
 static void		pmap_pinit(pmap_t);
 static int		pmap_pmap_ctor(void *, void *, int);
 static void		pmap_alloc_l1(pmap_t);
 static void		pmap_free_l1(pmap_t);
 static void		pmap_use_l1(pmap_t);
 static struct l2_bucket *pmap_get_l2_bucket(pmap_t, vaddr_t);
 static struct l2_bucket *pmap_alloc_l2_bucket(pmap_t, vaddr_t);
 static void		pmap_free_l2_bucket(pmap_t, struct l2_bucket *, u_int);
 static int		pmap_l2ptp_ctor(void *, void *, int);
 static int		pmap_l2dtable_ctor(void *, void *, int);
 static void		pmap_vac_me_harder(struct vm_page *, pmap_t, vaddr_t);
 #ifdef PMAP_CACHE_VIVT
 static void		pmap_vac_me_kpmap(struct vm_page *, pmap_t, vaddr_t);
 static void		pmap_vac_me_user(struct vm_page *, pmap_t, vaddr_t);
 #endif
 static void		pmap_clearbit(struct vm_page *, u_int);
 #ifdef PMAP_CACHE_VIVT
 static int		pmap_clean_page(struct pv_entry *, bool);
 #endif
 #ifdef PMAP_CACHE_VIPT
 static void		pmap_syncicache_page(struct vm_page *);
 static void		pmap_flush_page(struct vm_page *, bool);
 #endif
 static void		pmap_page_remove(struct vm_page *);
 static void		pmap_init_l1(struct l1_ttable *, pd_entry_t *);
 static vaddr_t		kernel_pt_lookup(paddr_t);
 /*
  * External function prototypes
  */
 extern void bzero_page(vaddr_t);
 extern void bcopy_page(vaddr_t, vaddr_t);
 /*
  * Misc variables
  */
 vaddr_t virtual_avail;
 vaddr_t virtual_end;
 vaddr_t pmap_curmaxkvaddr;
 vaddr_t avail_start;
 vaddr_t avail_end;
 pv_addrqh_t pmap_boot_freeq = SLIST_HEAD_INITIALIZER(&pmap_boot_freeq);
 pv_addr_t kernelpages;
 pv_addr_t kernel_l1pt;
 pv_addr_t systempage;
 /* Function to set the debug level of the pmap code */
 #ifdef PMAP_DEBUG
 void
 pmap_debug(int level)
+{
 	pmap_debug_level = level;
 	printf("pmap_debug: level=%d\n", pmap_debug_level);
+}
 #endif	/* PMAP_DEBUG */
 /*
  * A bunch of routines to conditionally flush the caches/TLB depending
  * on whether the specified pmap actually needs to be flushed at any
  * given time.
  */
 static inline void
 pmap_tlb_flushID_SE(pmap_t pm, vaddr_t va)
+{
 	if (pm->pm_cstate.cs_tlb_id)
 		cpu_tlb_flushID_SE(va);
+}
 static inline void
 pmap_tlb_flushD_SE(pmap_t pm, vaddr_t va)
+{
 	if (pm->pm_cstate.cs_tlb_d)
 		cpu_tlb_flushD_SE(va);
+}
 static inline void
 pmap_tlb_flushID(pmap_t pm)
+{
 	if (pm->pm_cstate.cs_tlb_id) {
 		cpu_tlb_flushID();
 		pm->pm_cstate.cs_tlb = 0;
+	}
+}
 static inline void
 pmap_tlb_flushD(pmap_t pm)
+{
 	if (pm->pm_cstate.cs_tlb_d) {
 		cpu_tlb_flushD();
 		pm->pm_cstate.cs_tlb_d = 0;
+	}
+}
 #ifdef PMAP_CACHE_VIVT
 static inline void
 pmap_idcache_wbinv_range(pmap_t pm, vaddr_t va, vsize_t len)
+{
 	if (pm->pm_cstate.cs_cache_id) {
 		cpu_idcache_wbinv_range(va, len);
+	}
+}
 static inline void
 pmap_dcache_wb_range(pmap_t pm, vaddr_t va, vsize_t len,
     bool do_inv, bool rd_only)
+{
 	if (pm->pm_cstate.cs_cache_d) {
 		if (do_inv) {
 			if (rd_only)
 				cpu_dcache_inv_range(va, len);
 			else
 				cpu_dcache_wbinv_range(va, len);
 		} else
 		if (!rd_only)
 			cpu_dcache_wb_range(va, len);
+	}
+}
 static inline void
 pmap_idcache_wbinv_all(pmap_t pm)
+{
 	if (pm->pm_cstate.cs_cache_id) {
 		cpu_idcache_wbinv_all();
 		pm->pm_cstate.cs_cache = 0;
+	}
+}
 static inline void
 pmap_dcache_wbinv_all(pmap_t pm)
+{
 	if (pm->pm_cstate.cs_cache_d) {
 		cpu_dcache_wbinv_all();
 		pm->pm_cstate.cs_cache_d = 0;
+	}
+}
 #endif /* PMAP_CACHE_VIVT */
 static inline bool
 pmap_is_current(pmap_t pm)
+{
 	if (pm == pmap_kernel() || curproc->p_vmspace->vm_map.pmap == pm)
 		return true;
 	return false;
+}
 static inline bool
 pmap_is_cached(pmap_t pm)
+{
 	if (pm == pmap_kernel() || pmap_recent_user == NULL ||
 	    pmap_recent_user == pm)
 		return (true);
 	return false;
+}
 /*
  * PTE_SYNC_CURRENT:
+ *
  *     Make sure the pte is written out to RAM.
  *     We need to do this for one of two cases:
  *       - We're dealing with the kernel pmap
  *       - There is no pmap active in the cache/tlb.
  *       - The specified pmap is 'active' in the cache/tlb.
  */
 #ifdef PMAP_INCLUDE_PTE_SYNC
 #define	PTE_SYNC_CURRENT(pm, ptep)	\
 do {					\
 	if (PMAP_NEEDS_PTE_SYNC && 	\
 	    pmap_is_cached(pm))		\
 		PTE_SYNC(ptep);		\
 } while (/*CONSTCOND*/0)
 #else
 #define	PTE_SYNC_CURRENT(pm, ptep)	/* nothing */
 #endif
 /*
  * main pv_entry manipulation functions:
  *   pmap_enter_pv: enter a mapping onto a vm_page list
  *   pmap_remove_pv: remove a mappiing from a vm_page list
+ *
  * NOTE: pmap_enter_pv expects to lock the pvh itself
  *       pmap_remove_pv expects te caller to lock the pvh before calling
  */
 /*
  * pmap_enter_pv: enter a mapping onto a vm_page lst
+ *
  * => caller should hold the proper lock on pmap_main_lock
  * => caller should have pmap locked
  * => we will gain the lock on the vm_page and allocate the new pv_entry
  * => caller should adjust ptp's wire_count before calling
  * => caller should not adjust pmap's wire_count
  */
 static void
 pmap_enter_pv(struct vm_page *pg, struct pv_entry *pve, pmap_t pm,
     vaddr_t va, u_int flags)
+{
 	struct pv_entry **pvp;
 	NPDEBUG(PDB_PVDUMP,
 	    printf("pmap_enter_pv: pm %p, pg %p, flags 0x%x\n", pm, pg, flags));
 	pve->pv_pmap = pm;
 	pve->pv_va = va;
 	pve->pv_flags = flags;
 	simple_lock(&pg->mdpage.pvh_slock);	/* lock vm_page */
 	pvp = &SLIST_FIRST(&pg->mdpage.pvh_list);
 #ifdef PMAP_CACHE_VIPT
 	/*
 	 * Insert unmanaged entries, writeable first, at the head of
 	 * the pv list.
 	 */
 	if (__predict_true((flags & PVF_KENTRY) == 0)) {
 		while (*pvp != NULL && (*pvp)->pv_flags & PVF_KENTRY)
 			pvp = &SLIST_NEXT(*pvp, pv_link);
 	} else if ((flags & PVF_WRITE) == 0) {
 		while (*pvp != NULL && (*pvp)->pv_flags & PVF_WRITE)
 			pvp = &SLIST_NEXT(*pvp, pv_link);
+	}
 #endif
 	SLIST_NEXT(pve, pv_link) = *pvp;		/* add to ... */
 	*pvp = pve;				/* ... locked list */
 	pg->mdpage.pvh_attrs |= flags & (PVF_REF | PVF_MOD);
 #ifdef PMAP_CACHE_VIPT
 	if ((pve->pv_flags & PVF_KWRITE) == PVF_KWRITE)
 		pg->mdpage.pvh_attrs |= PVF_KMOD;
 	if ((pg->mdpage.pvh_attrs & (PVF_DMOD|PVF_NC)) != PVF_NC)
 		pg->mdpage.pvh_attrs |= PVF_DIRTY;
 	KASSERT((pg->mdpage.pvh_attrs & PVF_DMOD) == 0 || (pg->mdpage.pvh_attrs & (PVF_DIRTY|PVF_NC)));
 #endif
 	if (pm == pmap_kernel()) {
 		PMAPCOUNT(kernel_mappings);
 		if (flags & PVF_WRITE)
 			pg->mdpage.krw_mappings++;
 		else
 			pg->mdpage.kro_mappings++;
 	} else
 	if (flags & PVF_WRITE)
 		pg->mdpage.urw_mappings++;
 	else
 		pg->mdpage.uro_mappings++;
 #ifdef PMAP_CACHE_VIPT
 	/*
 	 * If this is an exec mapping and its the first exec mapping
 	 * for this page, make sure to sync the I-cache.
 	 */
 	if (PV_IS_EXEC_P(flags)) {
 		if (!PV_IS_EXEC_P(pg->mdpage.pvh_attrs)) {
 			pmap_syncicache_page(pg);
 			PMAPCOUNT(exec_synced_map);
+		}
 		PMAPCOUNT(exec_mappings);
+	}
 #endif
 	PMAPCOUNT(mappings);
 	simple_unlock(&pg->mdpage.pvh_slock);	/* unlock, done! */
 	if (pve->pv_flags & PVF_WIRED)
 		++pm->pm_stats.wired_count;
+}
 /*
+ *
  * pmap_find_pv: Find a pv entry
+ *
  * => caller should hold lock on vm_page
  */
 static inline struct pv_entry *
 pmap_find_pv(struct vm_page *pg, pmap_t pm, vaddr_t va)
+{
 	struct pv_entry *pv;
 	SLIST_FOREACH(pv, &pg->mdpage.pvh_list, pv_link) {
 		if (pm == pv->pv_pmap && va == pv->pv_va)
 			break;
+	}
 	return (pv);
+}
 /*
  * pmap_remove_pv: try to remove a mapping from a pv_list
+ *
  * => caller should hold proper lock on pmap_main_lock
  * => pmap should be locked
  * => caller should hold lock on vm_page [so that attrs can be adjusted]
  * => caller should adjust ptp's wire_count and free PTP if needed
  * => caller should NOT adjust pmap's wire_count
  * => we return the removed pve
  */
 static struct pv_entry *
 pmap_remove_pv(struct vm_page *pg, pmap_t pm, vaddr_t va, int skip_wired)
+{
 	struct pv_entry *pve, **prevptr;
 	NPDEBUG(PDB_PVDUMP,
 	    printf("pmap_remove_pv: pm %p, pg %p, va 0x%08lx\n", pm, pg, va));
 	prevptr = &SLIST_FIRST(&pg->mdpage.pvh_list); /* prev pv_entry ptr */
 	pve = *prevptr;
 	while (pve) {
 		if (pve->pv_pmap == pm && pve->pv_va == va) {	/* match? */
 			NPDEBUG(PDB_PVDUMP, printf("pmap_remove_pv: pm %p, pg "
 			    "%p, flags 0x%x\n", pm, pg, pve->pv_flags));
 			if (pve->pv_flags & PVF_WIRED) {
 				if (skip_wired)
 					return (NULL);
 				--pm->pm_stats.wired_count;
+			}
 			*prevptr = SLIST_NEXT(pve, pv_link);	/* remove it! */
 			if (pm == pmap_kernel()) {
 				PMAPCOUNT(kernel_unmappings);
 				if (pve->pv_flags & PVF_WRITE)
 					pg->mdpage.krw_mappings--;
 				else
 					pg->mdpage.kro_mappings--;
 			} else
 			if (pve->pv_flags & PVF_WRITE)
 				pg->mdpage.urw_mappings--;
 			else
 				pg->mdpage.uro_mappings--;
 			PMAPCOUNT(unmappings);
 #ifdef PMAP_CACHE_VIPT
 			if (!(pve->pv_flags & PVF_WRITE))
 				break;
 			/*
 			 * If this page has had an exec mapping, then if
 			 * this was the last mapping, discard the contents,
 			 * otherwise sync the i-cache for this page.
 			 */
 			if (PV_IS_EXEC_P(pg->mdpage.pvh_attrs)) {
 				if (SLIST_EMPTY(&pg->mdpage.pvh_list)) {
 					pg->mdpage.pvh_attrs &= ~PVF_EXEC;
 					PMAPCOUNT(exec_discarded_unmap);
 				} else {
 					pmap_syncicache_page(pg);
 					PMAPCOUNT(exec_synced_unmap);
+				}
+			}
 #endif /* PMAP_CACHE_VIPT */
 			break;
+		}
 		prevptr = &SLIST_NEXT(pve, pv_link);	/* previous pointer */
 		pve = *prevptr;				/* advance */
+	}
 #ifdef PMAP_CACHE_VIPT
 	/*
 	 * If we no longer have a WRITEABLE KENTRY at the head of list,
 	 * clear the KMOD attribute from the page.
 	 */
 	if (SLIST_FIRST(&pg->mdpage.pvh_list) == NULL
 	    || (SLIST_FIRST(&pg->mdpage.pvh_list)->pv_flags & PVF_KWRITE) == PVF_KWRITE)
 		pg->mdpage.pvh_attrs &= ~PVF_KMOD;
 	/*
 	 * If this was a writeable page and there are no more writeable
 	 * mappings (ignoring KMPAGE), clear the WRITE flag and writeback
 	 * the contents to memory.
 	 */
 	if (pg->mdpage.krw_mappings + pg->mdpage.urw_mappings == 0)
 		pg->mdpage.pvh_attrs &= ~PVF_WRITE;
 	KASSERT((pg->mdpage.pvh_attrs & PVF_DMOD) == 0 || (pg->mdpage.pvh_attrs & (PVF_DIRTY|PVF_NC)));
 #endif /* PMAP_CACHE_VIPT */
 	return(pve);				/* return removed pve */
+}
 /*
+ *
  * pmap_modify_pv: Update pv flags
+ *
  * => caller should hold lock on vm_page [so that attrs can be adjusted]
  * => caller should NOT adjust pmap's wire_count
  * => caller must call pmap_vac_me_harder() if writable status of a page
  *    may have changed.
  * => we return the old flags
+ *
  * Modify a physical-virtual mapping in the pv table
  */
 static u_int
 pmap_modify_pv(struct vm_page *pg, pmap_t pm, vaddr_t va,
     u_int clr_mask, u_int set_mask)
+{
 	struct pv_entry *npv;
 	u_int flags, oflags;
 	KASSERT((clr_mask & PVF_KENTRY) == 0);
 	KASSERT((set_mask & PVF_KENTRY) == 0);
 	if ((npv = pmap_find_pv(pg, pm, va)) == NULL)
 		return (0);
 	NPDEBUG(PDB_PVDUMP,
 	    printf("pmap_modify_pv: pm %p, pg %p, clr 0x%x, set 0x%x, flags 0x%x\n", pm, pg, clr_mask, set_mask, npv->pv_flags));
 	/*
 	 * There is at least one VA mapping this page.
 	 */
 	if (clr_mask & (PVF_REF | PVF_MOD)) {
 		pg->mdpage.pvh_attrs |= set_mask & (PVF_REF | PVF_MOD);
 #ifdef PMAP_CACHE_VIPT
 		if ((pg->mdpage.pvh_attrs & (PVF_DMOD|PVF_NC)) != PVF_NC)
 			pg->mdpage.pvh_attrs |= PVF_DIRTY;
 		KASSERT((pg->mdpage.pvh_attrs & PVF_DMOD) == 0 || (pg->mdpage.pvh_attrs & (PVF_DIRTY|PVF_NC)));
 #endif
+	}
 	oflags = npv->pv_flags;
 	npv->pv_flags = flags = (oflags & ~clr_mask) | set_mask;
 	if ((flags ^ oflags) & PVF_WIRED) {
 		if (flags & PVF_WIRED)
 			++pm->pm_stats.wired_count;
 		else
 			--pm->pm_stats.wired_count;
+	}
 	if ((flags ^ oflags) & PVF_WRITE) {
 		if (pm == pmap_kernel()) {
 			if (flags & PVF_WRITE) {
 				pg->mdpage.krw_mappings++;
 				pg->mdpage.kro_mappings--;
 			} else {
 				pg->mdpage.kro_mappings++;
 				pg->mdpage.krw_mappings--;
+			}
 		} else
 		if (flags & PVF_WRITE) {
 			pg->mdpage.urw_mappings++;
 			pg->mdpage.uro_mappings--;
 		} else {
 			pg->mdpage.uro_mappings++;
 			pg->mdpage.urw_mappings--;
+		}
+	}
 #ifdef PMAP_CACHE_VIPT
 	if (pg->mdpage.urw_mappings + pg->mdpage.krw_mappings == 0)
 		pg->mdpage.pvh_attrs &= ~PVF_WRITE;
 	/*
 	 * We have two cases here: the first is from enter_pv (new exec
 	 * page), the second is a combined pmap_remove_pv/pmap_enter_pv.
 	 * Since in latter, pmap_enter_pv won't do anything, we just have
 	 * to do what pmap_remove_pv would do.
 	 */
 	if ((PV_IS_EXEC_P(flags) && !PV_IS_EXEC_P(pg->mdpage.pvh_attrs))
 	    || (PV_IS_EXEC_P(pg->mdpage.pvh_attrs)
 		|| (!(flags & PVF_WRITE) && (oflags & PVF_WRITE)))) {
 		pmap_syncicache_page(pg);
 		PMAPCOUNT(exec_synced_remap);
+	}
 	KASSERT((pg->mdpage.pvh_attrs & PVF_DMOD) == 0 || (pg->mdpage.pvh_attrs & (PVF_DIRTY|PVF_NC)));
 #endif
 	PMAPCOUNT(remappings);
 	return (oflags);
+}
 /*
  * Allocate an L1 translation table for the specified pmap.
  * This is called at pmap creation time.
  */
 static void
 pmap_alloc_l1(pmap_t pm)
+{
 	struct l1_ttable *l1;
 	u_int8_t domain;
 	/*
 	 * Remove the L1 at the head of the LRU list
 	 */
 	simple_lock(&l1_lru_lock);
 	l1 = TAILQ_FIRST(&l1_lru_list);
 	KDASSERT(l1 != NULL);
 	TAILQ_REMOVE(&l1_lru_list, l1, l1_lru);
 	/*
 	 * Pick the first available domain number, and update
 	 * the link to the next number.
 	 */
 	domain = l1->l1_domain_first;
 	l1->l1_domain_first = l1->l1_domain_free[domain];
 	/*
 	 * If there are still free domain numbers in this L1,
 	 * put it back on the TAIL of the LRU list.
 	 */
 	if (++l1->l1_domain_use_count < PMAP_DOMAINS)
 		TAILQ_INSERT_TAIL(&l1_lru_list, l1, l1_lru);
 	simple_unlock(&l1_lru_lock);
 	/*
 	 * Fix up the relevant bits in the pmap structure
 	 */
 	pm->pm_l1 = l1;
 	pm->pm_domain = domain;
+}
 /*
  * Free an L1 translation table.
  * This is called at pmap destruction time.
  */
 static void
 pmap_free_l1(pmap_t pm)
+{
 	struct l1_ttable *l1 = pm->pm_l1;
 	simple_lock(&l1_lru_lock);
 	/*
 	 * If this L1 is currently on the LRU list, remove it.
 	 */
 	if (l1->l1_domain_use_count < PMAP_DOMAINS)
 		TAILQ_REMOVE(&l1_lru_list, l1, l1_lru);
 	/*
 	 * Free up the domain number which was allocated to the pmap
 	 */
 	l1->l1_domain_free[pm->pm_domain] = l1->l1_domain_first;
 	l1->l1_domain_first = pm->pm_domain;
 	l1->l1_domain_use_count--;
 	/*
 	 * The L1 now must have at least 1 free domain, so add
 	 * it back to the LRU list. If the use count is zero,
 	 * put it at the head of the list, otherwise it goes
 	 * to the tail.
 	 */
 	if (l1->l1_domain_use_count == 0)
 		TAILQ_INSERT_HEAD(&l1_lru_list, l1, l1_lru);
 	else
 		TAILQ_INSERT_TAIL(&l1_lru_list, l1, l1_lru);
 	simple_unlock(&l1_lru_lock);
+}
 static inline void
 pmap_use_l1(pmap_t pm)
+{
 	struct l1_ttable *l1;
 	/*
 	 * Do nothing if we're in interrupt context.
 	 * Access to an L1 by the kernel pmap must not affect
 	 * the LRU list.
 	 */
 	if (cpu_intr_p() || pm == pmap_kernel())
 		return;
 	l1 = pm->pm_l1;
 	/*
 	 * If the L1 is not currently on the LRU list, just return
 	 */
 	if (l1->l1_domain_use_count == PMAP_DOMAINS)
 		return;
 	simple_lock(&l1_lru_lock);
 @@ -2649,2436 +2649,2454 @@ pmap_page_remove(struct vm_page *pg)
 			cpu_tlb_flushD();
+	}
 	cpu_cpwait();
+}
 /*
  * pmap_t pmap_create(void)
+ *
  *      Create a new pmap structure from scratch.
  */
 pmap_t
 pmap_create(void)
+{
 	pmap_t pm;
 	pm = pool_cache_get(&pmap_cache, PR_WAITOK);
 	UVM_OBJ_INIT(&pm->pm_obj, NULL, 1);
 	pm->pm_stats.wired_count = 0;
 	pm->pm_stats.resident_count = 1;
 	pm->pm_cstate.cs_all = 0;
 	pmap_alloc_l1(pm);
 	/*
 	 * Note: The pool cache ensures that the pm_l2[] array is already
 	 * initialised to zero.
 	 */
 	pmap_pinit(pm);
 	LIST_INSERT_HEAD(&pmap_pmaps, pm, pm_list);
 	return (pm);
+}
 /*
  * void pmap_enter(pmap_t pm, vaddr_t va, paddr_t pa, vm_prot_t prot,
  *     int flags)
+ *
  *      Insert the given physical page (p) at
  *      the specified virtual address (v) in the
  *      target physical map with the protection requested.
+ *
  *      NB:  This is the only routine which MAY NOT lazy-evaluate
  *      or lose information.  That is, this routine must actually
  *      insert this page into the given map NOW.
  */
 int
 pmap_enter(pmap_t pm, vaddr_t va, paddr_t pa, vm_prot_t prot, int flags)
+{
 	struct l2_bucket *l2b;
 	struct vm_page *pg, *opg;
 	struct pv_entry *pve;
 	pt_entry_t *ptep, npte, opte;
 	u_int nflags;
 	u_int oflags;
 	NPDEBUG(PDB_ENTER, printf("pmap_enter: pm %p va 0x%lx pa 0x%lx prot %x flag %x\n", pm, va, pa, prot, flags));
 	KDASSERT((flags & PMAP_WIRED) == 0 || (flags & VM_PROT_ALL) != 0);
 	KDASSERT(((va | pa) & PGOFSET) == 0);
 	/*
 	 * Get a pointer to the page.  Later on in this function, we
 	 * test for a managed page by checking pg != NULL.
 	 */
 	pg = pmap_initialized ? PHYS_TO_VM_PAGE(pa) : NULL;
 	nflags = 0;
 	if (prot & VM_PROT_WRITE)
 		nflags |= PVF_WRITE;
 	if (prot & VM_PROT_EXECUTE)
 		nflags |= PVF_EXEC;
 	if (flags & PMAP_WIRED)
 		nflags |= PVF_WIRED;
 	PMAP_MAP_TO_HEAD_LOCK();
 	pmap_acquire_pmap_lock(pm);
 	/*
 	 * Fetch the L2 bucket which maps this page, allocating one if
 	 * necessary for user pmaps.
 	 */
 	if (pm == pmap_kernel())
 		l2b = pmap_get_l2_bucket(pm, va);
 	else
 		l2b = pmap_alloc_l2_bucket(pm, va);
 	if (l2b == NULL) {
 		if (flags & PMAP_CANFAIL) {
 			pmap_release_pmap_lock(pm);
 			PMAP_MAP_TO_HEAD_UNLOCK();
 			return (ENOMEM);
+		}
 		panic("pmap_enter: failed to allocate L2 bucket");
+	}
 	ptep = &l2b->l2b_kva[l2pte_index(va)];
 	opte = *ptep;
 	npte = pa;
 	oflags = 0;
 	if (opte) {
 		/*
 		 * There is already a mapping at this address.
 		 * If the physical address is different, lookup the
 		 * vm_page.
 		 */
 		if (l2pte_pa(opte) != pa)
 			opg = PHYS_TO_VM_PAGE(l2pte_pa(opte));
 		else
 			opg = pg;
 	} else
 		opg = NULL;
 	if (pg) {
 		/*
 		 * This is to be a managed mapping.
 		 */
 		if ((flags & VM_PROT_ALL) ||
 		    (pg->mdpage.pvh_attrs & PVF_REF)) {
 			/*
 			 * - The access type indicates that we don't need
 			 *   to do referenced emulation.
 			 * OR
 			 * - The physical page has already been referenced
 			 *   so no need to re-do referenced emulation here.
 			 */
 			npte |= L2_S_PROTO;
 			nflags |= PVF_REF;
 			if ((prot & VM_PROT_WRITE) != 0 &&
 			    ((flags & VM_PROT_WRITE) != 0 ||
 			     (pg->mdpage.pvh_attrs & PVF_MOD) != 0)) {
 				/*
 				 * This is a writable mapping, and the
 				 * page's mod state indicates it has
 				 * already been modified. Make it
 				 * writable from the outset.
 				 */
 				npte |= L2_S_PROT_W;
 				nflags |= PVF_MOD;
+			}
 		} else {
 			/*
 			 * Need to do page referenced emulation.
 			 */
 			npte |= L2_TYPE_INV;
+		}
 		npte |= pte_l2_s_cache_mode;
 		if (pg == opg) {
 			/*
 			 * We're changing the attrs of an existing mapping.
 			 */
 			simple_lock(&pg->mdpage.pvh_slock);
 			oflags = pmap_modify_pv(pg, pm, va,
 			    PVF_WRITE | PVF_EXEC | PVF_WIRED |
 			    PVF_MOD | PVF_REF, nflags);
 			simple_unlock(&pg->mdpage.pvh_slock);
 #ifdef PMAP_CACHE_VIVT
 			/*
 			 * We may need to flush the cache if we're
 			 * doing rw-ro...
 			 */
 			if (pm->pm_cstate.cs_cache_d &&
 			    (oflags & PVF_NC) == 0 &&
 			    (opte & L2_S_PROT_W) != 0 &&
 			    (prot & VM_PROT_WRITE) == 0)
 				cpu_dcache_wb_range(va, PAGE_SIZE);
 #endif
 		} else {
 			/*
 			 * New mapping, or changing the backing page
 			 * of an existing mapping.
 			 */
 			if (opg) {
 				/*
 				 * Replacing an existing mapping with a new one.
 				 * It is part of our managed memory so we
 				 * must remove it from the PV list
 				 */
 				simple_lock(&opg->mdpage.pvh_slock);
 				pve = pmap_remove_pv(opg, pm, va, 0);
 				pmap_vac_me_harder(opg, pm, 0);
 				simple_unlock(&opg->mdpage.pvh_slock);
 				oflags = pve->pv_flags;
 #ifdef PMAP_CACHE_VIVT
 				/*
 				 * If the old mapping was valid (ref/mod
 				 * emulation creates 'invalid' mappings
 				 * initially) then make sure to frob
 				 * the cache.
 				 */
 				if ((oflags & PVF_NC) == 0 &&
 				    l2pte_valid(opte)) {
 					if (PV_BEEN_EXECD(oflags)) {
 						pmap_idcache_wbinv_range(pm, va,
 						    PAGE_SIZE);
 					} else
 					if (PV_BEEN_REFD(oflags)) {
 						pmap_dcache_wb_range(pm, va,
 						    PAGE_SIZE, true,
 						    (oflags & PVF_WRITE) == 0);
+					}
+				}
 #endif
 			} else
 			if ((pve = pool_get(&pmap_pv_pool, PR_NOWAIT)) == NULL){
 				if ((flags & PMAP_CANFAIL) == 0)
 					panic("pmap_enter: no pv entries");
 				if (pm != pmap_kernel())
 					pmap_free_l2_bucket(pm, l2b, 0);
 				pmap_release_pmap_lock(pm);
 				PMAP_MAP_TO_HEAD_UNLOCK();
 				NPDEBUG(PDB_ENTER,
 				    printf("pmap_enter: ENOMEM\n"));
 				return (ENOMEM);
+			}
 			pmap_enter_pv(pg, pve, pm, va, nflags);
+		}
 	} else {
 		/*
 		 * We're mapping an unmanaged page.
 		 * These are always readable, and possibly writable, from
 		 * the get go as we don't need to track ref/mod status.
 		 */
 		npte |= L2_S_PROTO;
 		if (prot & VM_PROT_WRITE)
 			npte |= L2_S_PROT_W;
 		/*
 		 * Make sure the vector table is mapped cacheable
 		 */
 		if (pm != pmap_kernel() && va == vector_page)
 			npte |= pte_l2_s_cache_mode;
 		if (opg) {
 			/*
 			 * Looks like there's an existing 'managed' mapping
 			 * at this address.
 			 */
 			simple_lock(&opg->mdpage.pvh_slock);
 			pve = pmap_remove_pv(opg, pm, va, 0);
 			pmap_vac_me_harder(opg, pm, 0);
 			simple_unlock(&opg->mdpage.pvh_slock);
 			oflags = pve->pv_flags;
 #ifdef PMAP_CACHE_VIVT
 			if ((oflags & PVF_NC) == 0 && l2pte_valid(opte)) {
 				if (PV_BEEN_EXECD(oflags))
 					pmap_idcache_wbinv_range(pm, va,
 					    PAGE_SIZE);
 				else
 				if (PV_BEEN_REFD(oflags))
 					pmap_dcache_wb_range(pm, va, PAGE_SIZE,
 					    true, (oflags & PVF_WRITE) == 0);
+			}
 #endif
 			pool_put(&pmap_pv_pool, pve);
+		}
+	}
 	/*
 	 * Make sure userland mappings get the right permissions
 	 */
 	if (pm != pmap_kernel() && va != vector_page)
 		npte |= L2_S_PROT_U;
 	/*
 	 * Keep the stats up to date
 	 */
 	if (opte == 0) {
 		l2b->l2b_occupancy++;
 		pm->pm_stats.resident_count++;
+	}
 	NPDEBUG(PDB_ENTER,
 	    printf("pmap_enter: opte 0x%08x npte 0x%08x\n", opte, npte));
 	/*
 	 * If this is just a wiring change, the two PTEs will be
 	 * identical, so there's no need to update the page table.
 	 */
 	if (npte != opte) {
 		bool is_cached = pmap_is_cached(pm);
 		*ptep = npte;
 		if (is_cached) {
 			/*
 			 * We only need to frob the cache/tlb if this pmap
 			 * is current
 			 */
 			PTE_SYNC(ptep);
 			if (va != vector_page && l2pte_valid(npte)) {
 				/*
 				 * This mapping is likely to be accessed as
 				 * soon as we return to userland. Fix up the
 				 * L1 entry to avoid taking another
 				 * page/domain fault.
 				 */
 				pd_entry_t *pl1pd, l1pd;
 				pl1pd = &pm->pm_l1->l1_kva[L1_IDX(va)];
 				l1pd = l2b->l2b_phys | L1_C_DOM(pm->pm_domain) |
 				    L1_C_PROTO;
 				if (*pl1pd != l1pd) {
 					*pl1pd = l1pd;
 					PTE_SYNC(pl1pd);
+				}
+			}
+		}
 		if (PV_BEEN_EXECD(oflags))
 			pmap_tlb_flushID_SE(pm, va);
 		else
 		if (PV_BEEN_REFD(oflags))
 			pmap_tlb_flushD_SE(pm, va);
 		NPDEBUG(PDB_ENTER,
 		    printf("pmap_enter: is_cached %d cs 0x%08x\n",
 		    is_cached, pm->pm_cstate.cs_all));
 		if (pg != NULL) {
 			simple_lock(&pg->mdpage.pvh_slock);
 			pmap_vac_me_harder(pg, pm, va);
 			simple_unlock(&pg->mdpage.pvh_slock);
+		}
+	}
 #if defined(PMAP_CACHE_VIPT) && defined(DIAGNOSTIC)
 	simple_lock(&pg->mdpage.pvh_slock);
 	KASSERT((pg->mdpage.pvh_attrs & PVF_DMOD) == 0 || (pg->mdpage.pvh_attrs & (PVF_DIRTY|PVF_NC)));
 	KASSERT(((pg->mdpage.pvh_attrs & PVF_WRITE) == 0) == (pg->mdpage.urw_mappings + pg->mdpage.krw_mappings == 0));
 	simple_unlock(&pg->mdpage.pvh_slock);
 #endif
 	pmap_release_pmap_lock(pm);
 	PMAP_MAP_TO_HEAD_UNLOCK();
 	return (0);
+}
 /*
  * pmap_remove()
+ *
  * pmap_remove is responsible for nuking a number of mappings for a range
  * of virtual address space in the current pmap. To do this efficiently
  * is interesting, because in a number of cases a wide virtual address
  * range may be supplied that contains few actual mappings. So, the
  * optimisations are:
  *  1. Skip over hunks of address space for which no L1 or L2 entry exists.
  *  2. Build up a list of pages we've hit, up to a maximum, so we can
  *     maybe do just a partial cache clean. This path of execution is
  *     complicated by the fact that the cache must be flushed _before_
  *     the PTE is nuked, being a VAC :-)
  *  3. If we're called after UVM calls pmap_remove_all(), we can defer
  *     all invalidations until pmap_update(), since pmap_remove_all() has
  *     already flushed the cache.
  *  4. Maybe later fast-case a single page, but I don't think this is
  *     going to make _that_ much difference overall.
  */
 #define	PMAP_REMOVE_CLEAN_LIST_SIZE	3
 void
 pmap_do_remove(pmap_t pm, vaddr_t sva, vaddr_t eva, int skip_wired)
+{
 	struct l2_bucket *l2b;
 	vaddr_t next_bucket;
 	pt_entry_t *ptep;
 	u_int cleanlist_idx, total, cnt;
 	struct {
 		vaddr_t va;
 		pt_entry_t *ptep;
 	} cleanlist[PMAP_REMOVE_CLEAN_LIST_SIZE];
 	u_int mappings, is_exec, is_refd;
 	NPDEBUG(PDB_REMOVE, printf("pmap_do_remove: pmap=%p sva=%08lx "
 	    "eva=%08lx\n", pm, sva, eva));
 	/*
 	 * we lock in the pmap => pv_head direction
 	 */
 	PMAP_MAP_TO_HEAD_LOCK();
 	pmap_acquire_pmap_lock(pm);
 	if (pm->pm_remove_all || !pmap_is_cached(pm)) {
 		cleanlist_idx = PMAP_REMOVE_CLEAN_LIST_SIZE + 1;
 		if (pm->pm_cstate.cs_tlb == 0)
 			pm->pm_remove_all = true;
 	} else
 		cleanlist_idx = 0;
 	total = 0;
 	while (sva < eva) {
 		/*
 		 * Do one L2 bucket's worth at a time.
 		 */
 		next_bucket = L2_NEXT_BUCKET(sva);
 		if (next_bucket > eva)
 			next_bucket = eva;
 		l2b = pmap_get_l2_bucket(pm, sva);
 		if (l2b == NULL) {
 			sva = next_bucket;
 			continue;
+		}
 		ptep = &l2b->l2b_kva[l2pte_index(sva)];
 		for (mappings = 0; sva < next_bucket; sva += PAGE_SIZE, ptep++){
 			struct vm_page *pg;
 			pt_entry_t pte;
 			paddr_t pa;
 			pte = *ptep;
 			if (pte == 0) {
 				/* Nothing here, move along */
 				continue;
+			}
 			pa = l2pte_pa(pte);
 			is_exec = 0;
 			is_refd = 1;
 			/*
 			 * Update flags. In a number of circumstances,
 			 * we could cluster a lot of these and do a
 			 * number of sequential pages in one go.
 			 */
 			if ((pg = PHYS_TO_VM_PAGE(pa)) != NULL) {
 				struct pv_entry *pve;
 				simple_lock(&pg->mdpage.pvh_slock);
 				pve = pmap_remove_pv(pg, pm, sva, skip_wired);
 				pmap_vac_me_harder(pg, pm, 0);
 				simple_unlock(&pg->mdpage.pvh_slock);
 				if (pve != NULL) {
 					if (pm->pm_remove_all == false) {
 						is_exec =
 						   PV_BEEN_EXECD(pve->pv_flags);
 						is_refd =
 						   PV_BEEN_REFD(pve->pv_flags);
+					}
 					pool_put(&pmap_pv_pool, pve);
 				} else
 				if (skip_wired) {
 					/* The mapping is wired. Skip it */
 					continue;
+				}
 			} else
 			if (skip_wired) {
 				/* Unmanaged pages are always wired. */
 				continue;
+			}
 			mappings++;
 			if (!l2pte_valid(pte)) {
 				/*
 				 * Ref/Mod emulation is still active for this
 				 * mapping, therefore it is has not yet been
 				 * accessed. No need to frob the cache/tlb.
 				 */
 				*ptep = 0;
 				PTE_SYNC_CURRENT(pm, ptep);
 				continue;
+			}
 			if (cleanlist_idx < PMAP_REMOVE_CLEAN_LIST_SIZE) {
 				/* Add to the clean list. */
 				cleanlist[cleanlist_idx].ptep = ptep;
 				cleanlist[cleanlist_idx].va =
 				    sva | (is_exec & 1);
 				cleanlist_idx++;
 			} else
 			if (cleanlist_idx == PMAP_REMOVE_CLEAN_LIST_SIZE) {
 				/* Nuke everything if needed. */
 #ifdef PMAP_CACHE_VIVT
 				pmap_idcache_wbinv_all(pm);
 #endif
 				pmap_tlb_flushID(pm);
 				/*
 				 * Roll back the previous PTE list,
 				 * and zero out the current PTE.
 				 */
 				for (cnt = 0;
 				     cnt < PMAP_REMOVE_CLEAN_LIST_SIZE; cnt++) {
 					*cleanlist[cnt].ptep = 0;
 					PTE_SYNC(cleanlist[cnt].ptep);
+				}
 				*ptep = 0;
 				PTE_SYNC(ptep);
 				cleanlist_idx++;
 				pm->pm_remove_all = true;
 			} else {
 				*ptep = 0;
 				PTE_SYNC(ptep);
 				if (pm->pm_remove_all == false) {
 					if (is_exec)
 						pmap_tlb_flushID_SE(pm, sva);
 					else
 					if (is_refd)
 						pmap_tlb_flushD_SE(pm, sva);
+				}
+			}
+		}
 		/*
 		 * Deal with any left overs
 		 */
 		if (cleanlist_idx <= PMAP_REMOVE_CLEAN_LIST_SIZE) {
 			total += cleanlist_idx;
 			for (cnt = 0; cnt < cleanlist_idx; cnt++) {
 				if (pm->pm_cstate.cs_all != 0) {
 					vaddr_t clva = cleanlist[cnt].va & ~1;
 					if (cleanlist[cnt].va & 1) {
 #ifdef PMAP_CACHE_VIVT
 						pmap_idcache_wbinv_range(pm,
 						    clva, PAGE_SIZE);
 #endif
 						pmap_tlb_flushID_SE(pm, clva);
 					} else {
 #ifdef PMAP_CACHE_VIVT
 						pmap_dcache_wb_range(pm,
 						    clva, PAGE_SIZE, true,
 						    false);
 #endif
 						pmap_tlb_flushD_SE(pm, clva);
+					}
+				}
 				*cleanlist[cnt].ptep = 0;
 				PTE_SYNC_CURRENT(pm, cleanlist[cnt].ptep);
+			}
 			/*
 			 * If it looks like we're removing a whole bunch
 			 * of mappings, it's faster to just write-back
 			 * the whole cache now and defer TLB flushes until
 			 * pmap_update() is called.
 			 */
 			if (total <= PMAP_REMOVE_CLEAN_LIST_SIZE)
 				cleanlist_idx = 0;
 			else {
 				cleanlist_idx = PMAP_REMOVE_CLEAN_LIST_SIZE + 1;
 #ifdef PMAP_CACHE_VIVT
 				pmap_idcache_wbinv_all(pm);
 #endif
 				pm->pm_remove_all = true;
+			}
+		}
 		pmap_free_l2_bucket(pm, l2b, mappings);
 		pm->pm_stats.resident_count -= mappings;
+	}
 	pmap_release_pmap_lock(pm);
 	PMAP_MAP_TO_HEAD_UNLOCK();
+}
 #ifdef PMAP_CACHE_VIPT
 static struct pv_entry *
 pmap_kremove_pg(struct vm_page *pg, vaddr_t va)
+{
 	struct pv_entry *pv;
 	simple_lock(&pg->mdpage.pvh_slock);
 	KASSERT(pg->mdpage.pvh_attrs & (PVF_COLORED|PVF_NC));
 	KASSERT((pg->mdpage.pvh_attrs & PVF_KMPAGE) == 0);
 	pv = pmap_remove_pv(pg, pmap_kernel(), va, false);
 	KASSERT(pv);
 	KASSERT(pv->pv_flags & PVF_KENTRY);
 	/*
 	 * If we are removing a writeable mapping to a cached exec page,
 	 * if it's the last mapping then clear it execness other sync
 	 * the page to the icache.
 	 */
 	if ((pg->mdpage.pvh_attrs & (PVF_NC|PVF_EXEC)) == PVF_EXEC
 	    && (pv->pv_flags & PVF_WRITE) != 0) {
 		if (SLIST_EMPTY(&pg->mdpage.pvh_list)) {
 			pg->mdpage.pvh_attrs &= ~PVF_EXEC;
 			PMAPCOUNT(exec_discarded_kremove);
 		} else {
 			pmap_syncicache_page(pg);
 			PMAPCOUNT(exec_synced_kremove);
+		}
+	}
 	pmap_vac_me_harder(pg, pmap_kernel(), 0);
 	simple_unlock(&pg->mdpage.pvh_slock);
 	return pv;
+}
 #endif /* PMAP_CACHE_VIPT */
 /*
  * pmap_kenter_pa: enter an unmanaged, wired kernel mapping
+ *
  * We assume there is already sufficient KVM space available
  * to do this, as we can't allocate L2 descriptor tables/metadata
  * from here.
  */
 void
 pmap_kenter_pa(vaddr_t va, paddr_t pa, vm_prot_t prot)
+{
 	struct l2_bucket *l2b;
 	pt_entry_t *ptep, opte;
 #ifdef PMAP_CACHE_VIVT
 	struct vm_page *pg = (prot & PMAP_KMPAGE) ? PHYS_TO_VM_PAGE(pa) : NULL;
 #endif
 #ifdef PMAP_CACHE_VIPT
 	struct vm_page *pg = PHYS_TO_VM_PAGE(pa);
 	struct vm_page *opg;
 	struct pv_entry *pv = NULL;
 #endif
 	NPDEBUG(PDB_KENTER,
 	    printf("pmap_kenter_pa: va 0x%08lx, pa 0x%08lx, prot 0x%x\n",
 	    va, pa, prot));
 	l2b = pmap_get_l2_bucket(pmap_kernel(), va);
 	KDASSERT(l2b != NULL);
 	ptep = &l2b->l2b_kva[l2pte_index(va)];
 	opte = *ptep;
 	if (opte == 0) {
 		PMAPCOUNT(kenter_mappings);
 		l2b->l2b_occupancy++;
 	} else {
 		PMAPCOUNT(kenter_remappings);
 #ifdef PMAP_CACHE_VIPT
 		opg = PHYS_TO_VM_PAGE(l2pte_pa(opte));
 		if (opg) {
 			KASSERT(opg != pg);
 			KASSERT((opg->mdpage.pvh_attrs & PVF_KMPAGE) == 0);
 			KASSERT((prot & PMAP_KMPAGE) == 0);
 			simple_lock(&opg->mdpage.pvh_slock);
 			pv = pmap_kremove_pg(opg, va);
 			simple_unlock(&opg->mdpage.pvh_slock);
+		}
 #endif
 		if (l2pte_valid(opte)) {
 #ifdef PMAP_CACHE_VIVT
 			cpu_dcache_wbinv_range(va, PAGE_SIZE);
 #endif
 			cpu_tlb_flushD_SE(va);
 			cpu_cpwait();
+		}
+	}
 	*ptep = L2_S_PROTO | pa | L2_S_PROT(PTE_KERNEL, prot) |
 	    pte_l2_s_cache_mode;
 	PTE_SYNC(ptep);
 	if (pg) {
 		if (prot & PMAP_KMPAGE) {
 			simple_lock(&pg->mdpage.pvh_slock);
 			KASSERT(pg->mdpage.urw_mappings == 0);
 			KASSERT(pg->mdpage.uro_mappings == 0);
 			KASSERT(pg->mdpage.krw_mappings == 0);
 			KASSERT(pg->mdpage.kro_mappings == 0);
 #ifdef PMAP_CACHE_VIPT
 			KASSERT(pv == NULL);
 			KASSERT((va & PVF_COLORED) == 0);
 			KASSERT((pg->mdpage.pvh_attrs & PVF_NC) == 0);
 			/* if there is a color conflict, evict from cache. */
 			if (pmap_is_page_colored_p(pg)
 			    && ((va ^ pg->mdpage.pvh_attrs) & arm_cache_prefer_mask)) {
 				PMAPCOUNT(vac_color_change);
 				pmap_flush_page(pg, true);
+			}
 			pg->mdpage.pvh_attrs &= PAGE_SIZE - 1;
 			pg->mdpage.pvh_attrs |= PVF_KMPAGE
 			    | PVF_COLORED | PVF_DIRTY
 			    | (va & arm_cache_prefer_mask);
 #endif
 #ifdef PMAP_CACHE_VIVT
 			pg->mdpage.pvh_attrs |= PVF_KMPAGE;
 #endif
 			pmap_kmpages++;
 			simple_unlock(&pg->mdpage.pvh_slock);
 #ifdef PMAP_CACHE_VIPT
 		} else {
 			if (pv == NULL) {
 				pv = pool_get(&pmap_pv_pool, PR_NOWAIT);
 				KASSERT(pv != NULL);
+			}
 			pmap_enter_pv(pg, pv, pmap_kernel(), va,
 			    PVF_WIRED | PVF_KENTRY
 			    | (prot & VM_PROT_WRITE ? PVF_WRITE : 0));
 			if ((prot & VM_PROT_WRITE)
 			    && !(pg->mdpage.pvh_attrs & PVF_NC))
 				pg->mdpage.pvh_attrs |= PVF_DIRTY;
 			KASSERT((prot & VM_PROT_WRITE) == 0 || (pg->mdpage.pvh_attrs & (PVF_DIRTY|PVF_NC)));
 			simple_lock(&pg->mdpage.pvh_slock);
 			pmap_vac_me_harder(pg, pmap_kernel(), va);
 			simple_unlock(&pg->mdpage.pvh_slock);
 #endif
+		}
 #ifdef PMAP_CACHE_VIPT
 	} else {
 		if (pv != NULL)
 			pool_put(&pmap_pv_pool, pv);
 #endif
+	}
+}
 void
 pmap_kremove(vaddr_t va, vsize_t len)
+{
 	struct l2_bucket *l2b;
 	pt_entry_t *ptep, *sptep, opte;
 	vaddr_t next_bucket, eva;
 	u_int mappings;
 	struct vm_page *opg;
 	PMAPCOUNT(kenter_unmappings);
 	NPDEBUG(PDB_KREMOVE, printf("pmap_kremove: va 0x%08lx, len 0x%08lx\n",
 	    va, len));
 	eva = va + len;
 	while (va < eva) {
 		next_bucket = L2_NEXT_BUCKET(va);
 		if (next_bucket > eva)
 			next_bucket = eva;
 		l2b = pmap_get_l2_bucket(pmap_kernel(), va);
 		KDASSERT(l2b != NULL);
 		sptep = ptep = &l2b->l2b_kva[l2pte_index(va)];
 		mappings = 0;
 		while (va < next_bucket) {
 			opte = *ptep;
 			opg = PHYS_TO_VM_PAGE(l2pte_pa(opte));
 			if (opg) {
 				if (opg->mdpage.pvh_attrs & PVF_KMPAGE) {
 					simple_lock(&opg->mdpage.pvh_slock);
 					KASSERT(opg->mdpage.urw_mappings == 0);
 					KASSERT(opg->mdpage.uro_mappings == 0);
 					KASSERT(opg->mdpage.krw_mappings == 0);
 					KASSERT(opg->mdpage.kro_mappings == 0);
 					opg->mdpage.pvh_attrs &= ~PVF_KMPAGE;
 #ifdef PMAP_CACHE_VIPT
 					opg->mdpage.pvh_attrs &= ~PVF_WRITE;
 #endif
 					pmap_kmpages--;
 					simple_unlock(&opg->mdpage.pvh_slock);
 #ifdef PMAP_CACHE_VIPT
 				} else {
 					pool_put(&pmap_pv_pool,
 					    pmap_kremove_pg(opg, va));
 #endif
+				}
+			}
 			if (l2pte_valid(opte)) {
 #ifdef PMAP_CACHE_VIVT
 				cpu_dcache_wbinv_range(va, PAGE_SIZE);
 #endif
 				cpu_tlb_flushD_SE(va);
+			}
 			if (opte) {
 				*ptep = 0;
 				mappings++;
+			}
 			va += PAGE_SIZE;
 			ptep++;
+		}
 		KDASSERT(mappings <= l2b->l2b_occupancy);
 		l2b->l2b_occupancy -= mappings;
 		PTE_SYNC_RANGE(sptep, (u_int)(ptep - sptep));
+	}
 	cpu_cpwait();
+}
 bool
 pmap_extract(pmap_t pm, vaddr_t va, paddr_t *pap)
+{
 	struct l2_dtable *l2;
 	pd_entry_t *pl1pd, l1pd;
 	pt_entry_t *ptep, pte;
 	paddr_t pa;
 	u_int l1idx;
 	pmap_acquire_pmap_lock(pm);
 	l1idx = L1_IDX(va);
 	pl1pd = &pm->pm_l1->l1_kva[l1idx];
 	l1pd = *pl1pd;
 	if (l1pte_section_p(l1pd)) {
 		/*
 		 * These should only happen for pmap_kernel()
 		 */
 		KDASSERT(pm == pmap_kernel());
 		pmap_release_pmap_lock(pm);
 		pa = (l1pd & L1_S_FRAME) | (va & L1_S_OFFSET);
 	} else {
 		/*
 		 * Note that we can't rely on the validity of the L1
 		 * descriptor as an indication that a mapping exists.
 		 * We have to look it up in the L2 dtable.
 		 */
 		l2 = pm->pm_l2[L2_IDX(l1idx)];
 		if (l2 == NULL ||
 		    (ptep = l2->l2_bucket[L2_BUCKET(l1idx)].l2b_kva) == NULL) {
 			pmap_release_pmap_lock(pm);
 			return false;
+		}
 		ptep = &ptep[l2pte_index(va)];
 		pte = *ptep;
 		pmap_release_pmap_lock(pm);
 		if (pte == 0)
 			return false;
 		switch (pte & L2_TYPE_MASK) {
 		case L2_TYPE_L:
 			pa = (pte & L2_L_FRAME) | (va & L2_L_OFFSET);
 			break;
 		default:
 			pa = (pte & L2_S_FRAME) | (va & L2_S_OFFSET);
 			break;
+		}
+	}
 	if (pap != NULL)
 		*pap = pa;
 	return true;
+}
 void
 pmap_protect(pmap_t pm, vaddr_t sva, vaddr_t eva, vm_prot_t prot)
+{
 	struct l2_bucket *l2b;
 	pt_entry_t *ptep, pte;
 	vaddr_t next_bucket;
 	u_int flags;
 	u_int clr_mask;
 	int flush;
 	NPDEBUG(PDB_PROTECT,
 	    printf("pmap_protect: pm %p sva 0x%lx eva 0x%lx prot 0x%x\n",
 	    pm, sva, eva, prot));
 	if ((prot & VM_PROT_READ) == 0) {
 		pmap_remove(pm, sva, eva);
 		return;
+	}
 	if (prot & VM_PROT_WRITE) {
 		/*
 		 * If this is a read->write transition, just ignore it and let
 		 * uvm_fault() take care of it later.
 		 */
 		return;
+	}
 	PMAP_MAP_TO_HEAD_LOCK();
 	pmap_acquire_pmap_lock(pm);
 	flush = ((eva - sva) >= (PAGE_SIZE * 4)) ? 0 : -1;
 	flags = 0;
 	clr_mask = PVF_WRITE | ((prot & VM_PROT_EXECUTE) ? 0 : PVF_EXEC);
 	while (sva < eva) {
 		next_bucket = L2_NEXT_BUCKET(sva);
 		if (next_bucket > eva)
 			next_bucket = eva;
 		l2b = pmap_get_l2_bucket(pm, sva);
 		if (l2b == NULL) {
 			sva = next_bucket;
 			continue;
+		}
 		ptep = &l2b->l2b_kva[l2pte_index(sva)];
 		while (sva < next_bucket) {
 			pte = *ptep;
 			if (l2pte_valid(pte) != 0 && (pte & L2_S_PROT_W) != 0) {
 				struct vm_page *pg;
 				u_int f;
 #ifdef PMAP_CACHE_VIVT
 				/*
 				 * OK, at this point, we know we're doing
 				 * write-protect operation.  If the pmap is
 				 * active, write-back the page.
 				 */
 				pmap_dcache_wb_range(pm, sva, PAGE_SIZE,
 				    false, false);
 #endif
 				pg = PHYS_TO_VM_PAGE(l2pte_pa(pte));
 				pte &= ~L2_S_PROT_W;
 				*ptep = pte;
 				PTE_SYNC(ptep);
 				if (pg != NULL) {
 					simple_lock(&pg->mdpage.pvh_slock);
 					f = pmap_modify_pv(pg, pm, sva,
 					    clr_mask, 0);
 					pmap_vac_me_harder(pg, pm, sva);
 					simple_unlock(&pg->mdpage.pvh_slock);
 				} else
 					f = PVF_REF | PVF_EXEC;
 				if (flush >= 0) {
 					flush++;
 					flags |= f;
 				} else
 				if (PV_BEEN_EXECD(f))
 					pmap_tlb_flushID_SE(pm, sva);
 				else
 				if (PV_BEEN_REFD(f))
 					pmap_tlb_flushD_SE(pm, sva);
+			}
 			sva += PAGE_SIZE;
 			ptep++;
+		}
+	}
 	pmap_release_pmap_lock(pm);
 	PMAP_MAP_TO_HEAD_UNLOCK();
 	if (flush) {
 		if (PV_BEEN_EXECD(flags))
 			pmap_tlb_flushID(pm);
 		else
 		if (PV_BEEN_REFD(flags))
 			pmap_tlb_flushD(pm);
+	}
+}
 void
 pmap_icache_sync_range(pmap_t pm, vaddr_t sva, vaddr_t eva)
+{
 	struct l2_bucket *l2b;
 	pt_entry_t *ptep;
 	vaddr_t next_bucket;
 	vsize_t page_size = trunc_page(sva) + PAGE_SIZE - sva;
 	NPDEBUG(PDB_EXEC,
 	    printf("pmap_icache_sync_range: pm %p sva 0x%lx eva 0x%lx\n",
 	    pm, sva, eva));
 	PMAP_MAP_TO_HEAD_LOCK();
 	pmap_acquire_pmap_lock(pm);
 	while (sva < eva) {
 		next_bucket = L2_NEXT_BUCKET(sva);
 		if (next_bucket > eva)
 			next_bucket = eva;
 		l2b = pmap_get_l2_bucket(pm, sva);
 		if (l2b == NULL) {
 			sva = next_bucket;
 			continue;
+		}
 		for (ptep = &l2b->l2b_kva[l2pte_index(sva)];
 		     sva < next_bucket;
 		     sva += page_size, ptep++, page_size = PAGE_SIZE) {
 			if (l2pte_valid(*ptep)) {
 				cpu_icache_sync_range(sva,
 				    min(page_size, eva - sva));
+			}
+		}
+	}
 	pmap_release_pmap_lock(pm);
 	PMAP_MAP_TO_HEAD_UNLOCK();
+}
 void
 pmap_page_protect(struct vm_page *pg, vm_prot_t prot)
+{
 	NPDEBUG(PDB_PROTECT,
 	    printf("pmap_page_protect: pg %p (0x%08lx), prot 0x%x\n",
 	    pg, VM_PAGE_TO_PHYS(pg), prot));
 	switch(prot) {
 		return;
 	case VM_PROT_READ|VM_PROT_WRITE:
 #if defined(PMAP_CHECK_VIPT) && defined(PMAP_APX)
 		pmap_clearbit(pg, PVF_EXEC);
 		break;
 #endif
 	case VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE:
 		break;
 	case VM_PROT_READ:
 #if defined(PMAP_CHECK_VIPT) && defined(PMAP_APX)
 		pmap_clearbit(pg, PVF_WRITE|PVF_EXEC);
 		break;
 #endif
 	case VM_PROT_READ|VM_PROT_EXECUTE:
 		pmap_clearbit(pg, PVF_WRITE);
 		break;
 	default:
 		pmap_page_remove(pg);
 		break;
+	}
+}
 /*
  * pmap_clear_modify:
+ *
  *	Clear the "modified" attribute for a page.
  */
 bool
 pmap_clear_modify(struct vm_page *pg)
+{
 	bool rv;
 	if (pg->mdpage.pvh_attrs & PVF_MOD) {
 		rv = true;
 		pmap_clearbit(pg, PVF_MOD);
 	} else
 		rv = false;
 	return (rv);
+}
 /*
  * pmap_clear_reference:
+ *
  *	Clear the "referenced" attribute for a page.
  */
 bool
 pmap_clear_reference(struct vm_page *pg)
+{
 	bool rv;
 	if (pg->mdpage.pvh_attrs & PVF_REF) {
 		rv = true;
 		pmap_clearbit(pg, PVF_REF);
 	} else
 		rv = false;
 	return (rv);
+}
 /*
  * pmap_is_modified:
+ *
  *	Test if a page has the "modified" attribute.
  */
 /* See <arm/arm32/pmap.h> */
 /*
  * pmap_is_referenced:
+ *
  *	Test if a page has the "referenced" attribute.
  */
 /* See <arm/arm32/pmap.h> */
 int
 pmap_fault_fixup(pmap_t pm, vaddr_t va, vm_prot_t ftype, int user)
+{
 	struct l2_dtable *l2;
 	struct l2_bucket *l2b;
 	pd_entry_t *pl1pd, l1pd;
 	pt_entry_t *ptep, pte;
 	paddr_t pa;
 	u_int l1idx;
 	int rv = 0;
 	PMAP_MAP_TO_HEAD_LOCK();
 	pmap_acquire_pmap_lock(pm);
 	l1idx = L1_IDX(va);
 	/*
 	 * If there is no l2_dtable for this address, then the process
 	 * has no business accessing it.
+	 *
 	 * Note: This will catch userland processes trying to access
 	 * kernel addresses.
 	 */
 	l2 = pm->pm_l2[L2_IDX(l1idx)];
 	if (l2 == NULL)
 		goto out;
 	/*
 	 * Likewise if there is no L2 descriptor table
 	 */
 	l2b = &l2->l2_bucket[L2_BUCKET(l1idx)];
 	if (l2b->l2b_kva == NULL)
 		goto out;
 	/*
 	 * Check the PTE itself.
 	 */
 	ptep = &l2b->l2b_kva[l2pte_index(va)];
 	pte = *ptep;
 	if (pte == 0)
 		goto out;
 	/*
 	 * Catch a userland access to the vector page mapped at 0x0
 	 */
 	if (user && (pte & L2_S_PROT_U) == 0)
 		goto out;
 	pa = l2pte_pa(pte);
 	if ((ftype & VM_PROT_WRITE) && (pte & L2_S_PROT_W) == 0) {
 		/*
 		 * This looks like a good candidate for "page modified"
 		 * emulation...
 		 */
 		struct pv_entry *pv;
 		struct vm_page *pg;
 		/* Extract the physical address of the page */
 		if ((pg = PHYS_TO_VM_PAGE(pa)) == NULL)
 			goto out;
 		/* Get the current flags for this page. */
 		simple_lock(&pg->mdpage.pvh_slock);
 		pv = pmap_find_pv(pg, pm, va);
 		if (pv == NULL) {
 	    		simple_unlock(&pg->mdpage.pvh_slock);
 			goto out;
+		}
 		/*
 		 * Do the flags say this page is writable? If not then it
 		 * is a genuine write fault. If yes then the write fault is
 		 * our fault as we did not reflect the write access in the
 		 * PTE. Now we know a write has occurred we can correct this
 		 * and also set the modified bit
 		 */
 		if ((pv->pv_flags & PVF_WRITE) == 0) {
 		    	simple_unlock(&pg->mdpage.pvh_slock);
 			goto out;
+		}
 		NPDEBUG(PDB_FOLLOW,
 		    printf("pmap_fault_fixup: mod emul. pm %p, va 0x%08lx, pa 0x%08lx\n",
 		    pm, va, VM_PAGE_TO_PHYS(pg)));
 		pg->mdpage.pvh_attrs |= PVF_REF | PVF_MOD;
 		pv->pv_flags |= PVF_REF | PVF_MOD;
 #ifdef PMAP_CACHE_VIPT
 		/*
 		 * If there are cacheable mappings for this page, mark it dirty.
 		 */
 		if ((pg->mdpage.pvh_attrs & PVF_NC) == 0)
 			pg->mdpage.pvh_attrs |= PVF_DIRTY;
 #endif
 		simple_unlock(&pg->mdpage.pvh_slock);
 		/*
 		 * Re-enable write permissions for the page.  No need to call
 		 * pmap_vac_me_harder(), since this is just a
 		 * modified-emulation fault, and the PVF_WRITE bit isn't
 		 * changing. We've already set the cacheable bits based on
 		 * the assumption that we can write to this page.
 		 */
 		*ptep = (pte & ~L2_TYPE_MASK) | L2_S_PROTO | L2_S_PROT_W;
 		PTE_SYNC(ptep);
 		rv = 1;
 	} else
 	if ((pte & L2_TYPE_MASK) == L2_TYPE_INV) {
 		/*
 		 * This looks like a good candidate for "page referenced"
 		 * emulation.
 		 */
 		struct pv_entry *pv;
 		struct vm_page *pg;
 		/* Extract the physical address of the page */
 		if ((pg = PHYS_TO_VM_PAGE(pa)) == NULL)
 			goto out;
 		/* Get the current flags for this page. */
 		simple_lock(&pg->mdpage.pvh_slock);
 		pv = pmap_find_pv(pg, pm, va);
 		if (pv == NULL) {
 	    		simple_unlock(&pg->mdpage.pvh_slock);
 			goto out;
+		}
 		pg->mdpage.pvh_attrs |= PVF_REF;
 		pv->pv_flags |= PVF_REF;
 		simple_unlock(&pg->mdpage.pvh_slock);
 		NPDEBUG(PDB_FOLLOW,
 		    printf("pmap_fault_fixup: ref emul. pm %p, va 0x%08lx, pa 0x%08lx\n",
 		    pm, va, VM_PAGE_TO_PHYS(pg)));
 		*ptep = (pte & ~L2_TYPE_MASK) | L2_S_PROTO;
 		PTE_SYNC(ptep);
 		rv = 1;
+	}
 	/*
 	 * We know there is a valid mapping here, so simply
 	 * fix up the L1 if necessary.
 	 */
 	pl1pd = &pm->pm_l1->l1_kva[l1idx];
 	l1pd = l2b->l2b_phys | L1_C_DOM(pm->pm_domain) | L1_C_PROTO;
 	if (*pl1pd != l1pd) {
 		*pl1pd = l1pd;
 		PTE_SYNC(pl1pd);
 		rv = 1;
+	}
 #ifdef CPU_SA110
 	/*
 	 * There are bugs in the rev K SA110.  This is a check for one
 	 * of them.
 	 */
 	if (rv == 0 && curcpu()->ci_arm_cputype == CPU_ID_SA110 &&
 	    curcpu()->ci_arm_cpurev < 3) {
 		/* Always current pmap */
 		if (l2pte_valid(pte)) {
 			extern int kernel_debug;
 			if (kernel_debug & 1) {
 				struct proc *p = curlwp->l_proc;
 				printf("prefetch_abort: page is already "
 				    "mapped - pte=%p *pte=%08x\n", ptep, pte);
 				printf("prefetch_abort: pc=%08lx proc=%p "
 				    "process=%s\n", va, p, p->p_comm);
 				printf("prefetch_abort: far=%08x fs=%x\n",
 				    cpu_faultaddress(), cpu_faultstatus());
+			}
 #ifdef DDB
 			if (kernel_debug & 2)
 				Debugger();
 #endif
 			rv = 1;
+		}
+	}
 #endif /* CPU_SA110 */
 #ifdef DEBUG
 	/*
 	 * If 'rv == 0' at this point, it generally indicates that there is a
 	 * stale TLB entry for the faulting address. This happens when two or
 	 * more processes are sharing an L1. Since we don't flush the TLB on
 	 * a context switch between such processes, we can take domain faults
 	 * for mappings which exist at the same VA in both processes. EVEN IF
 	 * WE'VE RECENTLY FIXED UP THE CORRESPONDING L1 in pmap_enter(), for
 	 * example.
+	 *
 	 * This is extremely likely to happen if pmap_enter() updated the L1
 	 * entry for a recently entered mapping. In this case, the TLB is
 	 * flushed for the new mapping, but there may still be TLB entries for
 	 * other mappings belonging to other processes in the 1MB range
 	 * covered by the L1 entry.
+	 *
 	 * Since 'rv == 0', we know that the L1 already contains the correct
 	 * value, so the fault must be due to a stale TLB entry.
+	 *
 	 * Since we always need to flush the TLB anyway in the case where we
 	 * fixed up the L1, or frobbed the L2 PTE, we effectively deal with
 	 * stale TLB entries dynamically.
+	 *
 	 * However, the above condition can ONLY happen if the current L1 is
 	 * being shared. If it happens when the L1 is unshared, it indicates
 	 * that other parts of the pmap are not doing their job WRT managing
 	 * the TLB.
 	 */
 	if (rv == 0 && pm->pm_l1->l1_domain_use_count == 1) {
 		extern int last_fault_code;
 		printf("fixup: pm %p, va 0x%lx, ftype %d - nothing to do!\n",
 		    pm, va, ftype);
 		printf("fixup: l2 %p, l2b %p, ptep %p, pl1pd %p\n",
 		    l2, l2b, ptep, pl1pd);
 		printf("fixup: pte 0x%x, l1pd 0x%x, last code 0x%x\n",
 		    pte, l1pd, last_fault_code);
 #ifdef DDB
 		Debugger();
 #endif
+	}
 #endif
 	cpu_tlb_flushID_SE(va);
 	cpu_cpwait();
 	rv = 1;
 out:
 	pmap_release_pmap_lock(pm);
 	PMAP_MAP_TO_HEAD_UNLOCK();
 	return (rv);
+}
 /*
  * pmap_collect: free resources held by a pmap
+ *
  * => optional function.
  * => called when a process is swapped out to free memory.
  */
 void
 pmap_collect(pmap_t pm)
+{
 #ifdef PMAP_CACHE_VIVT
 	pmap_idcache_wbinv_all(pm);
 #endif
 	pm->pm_remove_all = true;
 	pmap_do_remove(pm, VM_MIN_ADDRESS, VM_MAX_ADDRESS, 1);
 	pmap_update(pm);
 	PMAPCOUNT(collects);
+}
 /*
  * Routine:	pmap_procwr
+ *
  * Function:
  *	Synchronize caches corresponding to [addr, addr+len) in p.
+ *
  */
 void
 pmap_procwr(struct proc *p, vaddr_t va, int len)
+{
 	/* We only need to do anything if it is the current process. */
 	if (p == curproc)
 		cpu_icache_sync_range(va, len);
+}
 /*
  * Routine:	pmap_unwire
  * Function:	Clear the wired attribute for a map/virtual-address pair.
+ *
  * In/out conditions:
  *		The mapping must already exist in the pmap.
  */
 void
 pmap_unwire(pmap_t pm, vaddr_t va)
+{
 	struct l2_bucket *l2b;
 	pt_entry_t *ptep, pte;
 	struct vm_page *pg;
 	paddr_t pa;
 	NPDEBUG(PDB_WIRING, printf("pmap_unwire: pm %p, va 0x%08lx\n", pm, va));
 	PMAP_MAP_TO_HEAD_LOCK();
 	pmap_acquire_pmap_lock(pm);
 	l2b = pmap_get_l2_bucket(pm, va);
 	KDASSERT(l2b != NULL);
 	ptep = &l2b->l2b_kva[l2pte_index(va)];
 	pte = *ptep;
 	/* Extract the physical address of the page */
 	pa = l2pte_pa(pte);
 	if ((pg = PHYS_TO_VM_PAGE(pa)) != NULL) {
 		/* Update the wired bit in the pv entry for this page. */
 		simple_lock(&pg->mdpage.pvh_slock);
 		(void) pmap_modify_pv(pg, pm, va, PVF_WIRED, 0);
 		simple_unlock(&pg->mdpage.pvh_slock);
+	}
 	pmap_release_pmap_lock(pm);
 	PMAP_MAP_TO_HEAD_UNLOCK();
+}
 void
 pmap_activate(struct lwp *l)
+{
 	extern int block_userspace_access;
 	pmap_t opm, npm, rpm;
 	uint32_t odacr, ndacr;
 	int oldirqstate;
 	/*
 	 * If activating a non-current lwp or the current lwp is
 	 * already active, just return.
 	 */
 	if (l != curlwp ||
 	    l->l_proc->p_vmspace->vm_map.pmap->pm_activated == true)
 		return;
 	npm = l->l_proc->p_vmspace->vm_map.pmap;
 	ndacr = (DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)) |
 	    (DOMAIN_CLIENT << (npm->pm_domain * 2));
 	/*
 	 * If TTB and DACR are unchanged, short-circuit all the
 	 * TLB/cache management stuff.
 	 */
 	if (pmap_previous_active_lwp != NULL) {
 		opm = pmap_previous_active_lwp->l_proc->p_vmspace->vm_map.pmap;
 		odacr = (DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)) |
 		    (DOMAIN_CLIENT << (opm->pm_domain * 2));
 		if (opm->pm_l1 == npm->pm_l1 && odacr == ndacr)
 			goto all_done;
 	} else
 		opm = NULL;
 	PMAPCOUNT(activations);
 	block_userspace_access = 1;
 	/*
 	 * If switching to a user vmspace which is different to the
 	 * most recent one, and the most recent one is potentially
 	 * live in the cache, we must write-back and invalidate the
 	 * entire cache.
 	 */
 	rpm = pmap_recent_user;
 /*
  * XXXSCW: There's a corner case here which can leave turds in the cache as
  * reported in kern/41058. They're probably left over during tear-down and
  * switching away from an exiting process. Until the root cause is identified
  * and fixed, zap the cache when switching pmaps. This will result in a few
  * unnecessary cache flushes, but that's better than silently corrupting data.
  */
 #if 0
 	if (npm != pmap_kernel() && rpm && npm != rpm &&
 	    rpm->pm_cstate.cs_cache) {
 		rpm->pm_cstate.cs_cache = 0;
 #ifdef PMAP_CACHE_VIVT
 		cpu_idcache_wbinv_all();
 #endif
+	}
 #else
 	if (rpm) {
 		rpm->pm_cstate.cs_cache = 0;
 		if (npm == pmap_kernel())
 			pmap_recent_user = NULL;
 #ifdef PMAP_CACHE_VIVT
 		cpu_idcache_wbinv_all();
 #endif
+	}
 #endif
 	/* No interrupts while we frob the TTB/DACR */
 	oldirqstate = disable_interrupts(IF32_bits);
 	/*
 	 * For ARM_VECTORS_LOW, we MUST, I repeat, MUST fix up the L1
 	 * entry corresponding to 'vector_page' in the incoming L1 table
 	 * before switching to it otherwise subsequent interrupts/exceptions
 	 * (including domain faults!) will jump into hyperspace.
 	 */
 	if (npm->pm_pl1vec != NULL) {
 		cpu_tlb_flushID_SE((u_int)vector_page);
 		cpu_cpwait();
 		*npm->pm_pl1vec = npm->pm_l1vec;
 		PTE_SYNC(npm->pm_pl1vec);
+	}
 	cpu_domains(ndacr);
 	if (npm == pmap_kernel() || npm == rpm) {
 		/*
 		 * Switching to a kernel thread, or back to the
 		 * same user vmspace as before... Simply update
 		 * the TTB (no TLB flush required)
 		 */
 		__asm volatile("mcr p15, 0, %0, c2, c0, 0" ::
 		    "r"(npm->pm_l1->l1_physaddr));
 		cpu_cpwait();
 	} else {
 		/*
 		 * Otherwise, update TTB and flush TLB
 		 */
 		cpu_context_switch(npm->pm_l1->l1_physaddr);
 		if (rpm != NULL)
 			rpm->pm_cstate.cs_tlb = 0;
+	}
 	restore_interrupts(oldirqstate);
 	block_userspace_access = 0;
  all_done:
 	/*
 	 * The new pmap is resident. Make sure it's marked
 	 * as resident in the cache/TLB.
 	 */
 	npm->pm_cstate.cs_all = PMAP_CACHE_STATE_ALL;
 	if (npm != pmap_kernel())
 		pmap_recent_user = npm;
 	/* The old pmap is not longer active */
 	if (opm != NULL)
 		opm->pm_activated = false;
 	/* But the new one is */
 	npm->pm_activated = true;
+}
 void
 pmap_deactivate(struct lwp *l)
+{
 	/*
 	 * If the process is exiting, make sure pmap_activate() does
 	 * a full MMU context-switch and cache flush, which we might
 	 * otherwise skip. See PR port-arm/38950.
 	 */
 	if (l->l_proc->p_sflag & PS_WEXIT)
 		pmap_previous_active_lwp = NULL;
 	l->l_proc->p_vmspace->vm_map.pmap->pm_activated = false;
+}
 void
 pmap_update(pmap_t pm)
+{
 	if (pm->pm_remove_all) {
 		/*
 		 * Finish up the pmap_remove_all() optimisation by flushing
 		 * the TLB.
 		 */
 		pmap_tlb_flushID(pm);
 		pm->pm_remove_all = false;
+	}
 	if (pmap_is_current(pm)) {
 		/*
 		 * If we're dealing with a current userland pmap, move its L1
 		 * to the end of the LRU.
 		 */
 		if (pm != pmap_kernel())
 			pmap_use_l1(pm);
 		/*
 		 * We can assume we're done with frobbing the cache/tlb for
 		 * now. Make sure any future pmap ops don't skip cache/tlb
 		 * flushes.
 		 */
 		pm->pm_cstate.cs_all = PMAP_CACHE_STATE_ALL;
+	}
 	PMAPCOUNT(updates);
 	/*
 	 * make sure TLB/cache operations have completed.
 	 */
 	cpu_cpwait();
+}
 void
 pmap_remove_all(pmap_t pm)
+{
 	/*
 	 * The vmspace described by this pmap is about to be torn down.
 	 * Until pmap_update() is called, UVM will only make calls
 	 * to pmap_remove(). We can make life much simpler by flushing
 	 * the cache now, and deferring TLB invalidation to pmap_update().
 	 */
 #ifdef PMAP_CACHE_VIVT
 	pmap_idcache_wbinv_all(pm);
 #endif
 	pm->pm_remove_all = true;
+}
 /*
  * Retire the given physical map from service.
  * Should only be called if the map contains no valid mappings.
  */
 void
 pmap_destroy(pmap_t pm)
+{
 	u_int count;
 	if (pm == NULL)
 		return;
 	if (pm->pm_remove_all) {
 		pmap_tlb_flushID(pm);
 		pm->pm_remove_all = false;
+	}
 	/*
 	 * Drop reference count
 	 */
 	mutex_enter(&pm->pm_lock);
 	count = --pm->pm_obj.uo_refs;
 	mutex_exit(&pm->pm_lock);
 	if (count > 0) {
 		if (pmap_is_current(pm)) {
 			if (pm != pmap_kernel())
 				pmap_use_l1(pm);
 			pm->pm_cstate.cs_all = PMAP_CACHE_STATE_ALL;
+		}
 		return;
+	}
 	/*
 	 * reference count is zero, free pmap resources and then free pmap.
 	 */
 	if (vector_page < KERNEL_BASE) {
 		KDASSERT(!pmap_is_current(pm));
 		/* Remove the vector page mapping */
 		pmap_remove(pm, vector_page, vector_page + PAGE_SIZE);
 		pmap_update(pm);
+	}
 	LIST_REMOVE(pm, pm_list);
 	pmap_free_l1(pm);
 	if (pmap_recent_user == pm)
 		pmap_recent_user = NULL;
 	UVM_OBJ_DESTROY(&pm->pm_obj);
 	/* return the pmap to the pool */
 	pool_cache_put(&pmap_cache, pm);
+}
 /*
  * void pmap_reference(pmap_t pm)
+ *
  * Add a reference to the specified pmap.
  */
 void
 pmap_reference(pmap_t pm)
+{
 	if (pm == NULL)
 		return;
 	pmap_use_l1(pm);
 	mutex_enter(&pm->pm_lock);
 	pm->pm_obj.uo_refs++;
 	mutex_exit(&pm->pm_lock);
+}
 #if ARM_MMU_V6 > 0
 static struct evcnt pmap_prefer_nochange_ev =
     EVCNT_INITIALIZER(EVCNT_TYPE_MISC, NULL, "pmap prefer", "nochange");
 static struct evcnt pmap_prefer_change_ev =
     EVCNT_INITIALIZER(EVCNT_TYPE_MISC, NULL, "pmap prefer", "change");
 EVCNT_ATTACH_STATIC(pmap_prefer_change_ev);
 EVCNT_ATTACH_STATIC(pmap_prefer_nochange_ev);
 void
 pmap_prefer(vaddr_t hint, vaddr_t *vap, int td)
+{
 	vsize_t mask = arm_cache_prefer_mask | (PAGE_SIZE - 1);
 	vaddr_t va = *vap;
 	vaddr_t diff = (hint - va) & mask;
 	if (diff == 0) {
 		pmap_prefer_nochange_ev.ev_count++;
 	} else {
 		pmap_prefer_change_ev.ev_count++;
 		if (__predict_false(td))
 			va -= mask + 1;
 		*vap = va + diff;
+	}
+}
 #endif /* ARM_MMU_V6 */
 /*
  * pmap_zero_page()
+ *
  * Zero a given physical page by mapping it at a page hook point.
  * In doing the zero page op, the page we zero is mapped cachable, as with
  * StrongARM accesses to non-cached pages are non-burst making writing
  * _any_ bulk data very slow.
  */
 #if (ARM_MMU_GENERIC + ARM_MMU_SA1 + ARM_MMU_V6) != 0
 void
 pmap_zero_page_generic(paddr_t phys)
+{
 #if defined(PMAP_CACHE_VIPT) || defined(DEBUG)
 	struct vm_page *pg = PHYS_TO_VM_PAGE(phys);
 #endif
 #ifdef PMAP_CACHE_VIPT
 	/* Choose the last page color it had, if any */
 	const vsize_t va_offset = pg->mdpage.pvh_attrs & arm_cache_prefer_mask;
 #else
 	const vsize_t va_offset = 0;
 #endif
 	pt_entry_t * const ptep = &cdst_pte[va_offset >> PGSHIFT];
 #ifdef DEBUG
 	if (!SLIST_EMPTY(&pg->mdpage.pvh_list))
 		panic("pmap_zero_page: page has mappings");
 #endif
 	KDASSERT((phys & PGOFSET) == 0);
 	/*
 	 * Hook in the page, zero it, and purge the cache for that
 	 * zeroed page. Invalidate the TLB as needed.
 	 */
 	*ptep = L2_S_PROTO | phys |
 	    L2_S_PROT(PTE_KERNEL, VM_PROT_WRITE) | pte_l2_s_cache_mode;
 	PTE_SYNC(ptep);
 	cpu_tlb_flushD_SE(cdstp + va_offset);
 	cpu_cpwait();
 	bzero_page(cdstp + va_offset);
 	/*
 	 * Unmap the page.
 	 */
 	*ptep = 0;
 	PTE_SYNC(ptep);
 	cpu_tlb_flushD_SE(cdstp + va_offset);
 #ifdef PMAP_CACHE_VIVT
 	cpu_dcache_wbinv_range(cdstp + va_offset, PAGE_SIZE);
 #endif
 #ifdef PMAP_CACHE_VIPT
 	/*
 	 * This page is now cache resident so it now has a page color.
 	 * Any contents have been obliterated so clear the EXEC flag.
 	 */
 	if (!pmap_is_page_colored_p(pg)) {
 		PMAPCOUNT(vac_color_new);
 		pg->mdpage.pvh_attrs |= PVF_COLORED;
+	}
 	if (PV_IS_EXEC_P(pg->mdpage.pvh_attrs)) {
 		pg->mdpage.pvh_attrs &= ~PVF_EXEC;
 		PMAPCOUNT(exec_discarded_zero);
+	}
 	pg->mdpage.pvh_attrs |= PVF_DIRTY;
 #endif
+}
 #endif /* (ARM_MMU_GENERIC + ARM_MMU_SA1 + ARM_MMU_V6) != 0 */
 #if ARM_MMU_XSCALE == 1
 void
 pmap_zero_page_xscale(paddr_t phys)
+{
 #ifdef DEBUG
 	struct vm_page *pg = PHYS_TO_VM_PAGE(phys);
 	if (!SLIST_EMPTY(&pg->mdpage.pvh_list))
 		panic("pmap_zero_page: page has mappings");
 #endif
 	KDASSERT((phys & PGOFSET) == 0);
 	/*
 	 * Hook in the page, zero it, and purge the cache for that
 	 * zeroed page. Invalidate the TLB as needed.
 	 */
 	*cdst_pte = L2_S_PROTO | phys |
 	    L2_S_PROT(PTE_KERNEL, VM_PROT_WRITE) |
 	    L2_C | L2_XS_T_TEX(TEX_XSCALE_X);	/* mini-data */
 	PTE_SYNC(cdst_pte);
 	cpu_tlb_flushD_SE(cdstp);
 	cpu_cpwait();
 	bzero_page(cdstp);
 	xscale_cache_clean_minidata();
+}
 #endif /* ARM_MMU_XSCALE == 1 */
 /* pmap_pageidlezero()
+ *
  * The same as above, except that we assume that the page is not
  * mapped.  This means we never have to flush the cache first.  Called
  * from the idle loop.
  */
 bool
 pmap_pageidlezero(paddr_t phys)
+{
 	unsigned int i;
 	int *ptr;
 	bool rv = true;
 #if defined(PMAP_CACHE_VIPT) || defined(DEBUG)
 	struct vm_page * const pg = PHYS_TO_VM_PAGE(phys);
 #endif
 #ifdef PMAP_CACHE_VIPT
 	/* Choose the last page color it had, if any */
 	const vsize_t va_offset = pg->mdpage.pvh_attrs & arm_cache_prefer_mask;
 #else
 	const vsize_t va_offset = 0;
 #endif
 	pt_entry_t * const ptep = &csrc_pte[va_offset >> PGSHIFT];
 #ifdef DEBUG
 	if (!SLIST_EMPTY(&pg->mdpage.pvh_list))
 		panic("pmap_pageidlezero: page has mappings");
 #endif
 	KDASSERT((phys & PGOFSET) == 0);
 	/*
 	 * Hook in the page, zero it, and purge the cache for that
 	 * zeroed page. Invalidate the TLB as needed.
 	 */
 	*ptep = L2_S_PROTO | phys |
 	    L2_S_PROT(PTE_KERNEL, VM_PROT_WRITE) | pte_l2_s_cache_mode;
 	PTE_SYNC(ptep);
 	cpu_tlb_flushD_SE(cdstp + va_offset);
 	cpu_cpwait();
 	for (i = 0, ptr = (int *)(cdstp + va_offset);
 			i < (PAGE_SIZE / sizeof(int)); i++) {
 		if (sched_curcpu_runnable_p() != 0) {
 			/*
 			 * A process has become ready.  Abort now,
 			 * so we don't keep it waiting while we
 			 * do slow memory access to finish this
 			 * page.
 			 */
 			rv = false;
 			break;
+		}
 		*ptr++ = 0;
+	}
 #ifdef PMAP_CACHE_VIVT
 	if (rv)
 		/*
 		 * if we aborted we'll rezero this page again later so don't
 		 * purge it unless we finished it
 		 */
 		cpu_dcache_wbinv_range(cdstp, PAGE_SIZE);
 #elif defined(PMAP_CACHE_VIPT)
 	/*
 	 * This page is now cache resident so it now has a page color.
 	 * Any contents have been obliterated so clear the EXEC flag.
 	 */
 	if (!pmap_is_page_colored_p(pg)) {
 		PMAPCOUNT(vac_color_new);
 		pg->mdpage.pvh_attrs |= PVF_COLORED;
+	}
 	if (PV_IS_EXEC_P(pg->mdpage.pvh_attrs)) {
 		pg->mdpage.pvh_attrs &= ~PVF_EXEC;
 		PMAPCOUNT(exec_discarded_zero);
+	}
 #endif
 	/*
 	 * Unmap the page.
 	 */
 	*ptep = 0;
 	PTE_SYNC(ptep);
 	cpu_tlb_flushD_SE(cdstp + va_offset);
 	return (rv);
+}
 /*
  * pmap_copy_page()
+ *
  * Copy one physical page into another, by mapping the pages into
  * hook points. The same comment regarding cachability as in
  * pmap_zero_page also applies here.
  */
 #if (ARM_MMU_GENERIC + ARM_MMU_SA1 + ARM_MMU_V6) != 0
 void
 pmap_copy_page_generic(paddr_t src, paddr_t dst)
+{
 	struct vm_page * const src_pg = PHYS_TO_VM_PAGE(src);
 #if defined(PMAP_CACHE_VIPT) || defined(DEBUG)
 	struct vm_page * const dst_pg = PHYS_TO_VM_PAGE(dst);
 #endif
 #ifdef PMAP_CACHE_VIPT
 	const vsize_t src_va_offset = src_pg->mdpage.pvh_attrs & arm_cache_prefer_mask;
 	const vsize_t dst_va_offset = dst_pg->mdpage.pvh_attrs & arm_cache_prefer_mask;
 #else
 	const vsize_t src_va_offset = 0;
 	const vsize_t dst_va_offset = 0;
 #endif
 	pt_entry_t * const src_ptep = &csrc_pte[src_va_offset >> PGSHIFT];
 	pt_entry_t * const dst_ptep = &cdst_pte[dst_va_offset >> PGSHIFT];
 #ifdef DEBUG
 	if (!SLIST_EMPTY(&dst_pg->mdpage.pvh_list))
 		panic("pmap_copy_page: dst page has mappings");
 #endif
 #ifdef PMAP_CACHE_VIPT
 	KASSERT(src_pg->mdpage.pvh_attrs & (PVF_COLORED|PVF_NC));
 #endif
 	KDASSERT((src & PGOFSET) == 0);
 	KDASSERT((dst & PGOFSET) == 0);
 	/*
 	 * Clean the source page.  Hold the source page's lock for
 	 * the duration of the copy so that no other mappings can
 	 * be created while we have a potentially aliased mapping.
 	 */
 	simple_lock(&src_pg->mdpage.pvh_slock);
 #ifdef PMAP_CACHE_VIVT
 	(void) pmap_clean_page(SLIST_FIRST(&src_pg->mdpage.pvh_list), true);
 #endif
 	/*
 	 * Map the pages into the page hook points, copy them, and purge
 	 * the cache for the appropriate page. Invalidate the TLB
 	 * as required.
 	 */
 	*src_ptep = L2_S_PROTO
 	    | src
 #ifdef PMAP_CACHE_VIPT
 	    | ((src_pg->mdpage.pvh_attrs & PVF_NC) ? 0 : pte_l2_s_cache_mode)
 #endif
 #ifdef PMAP_CACHE_VIVT
 	    | pte_l2_s_cache_mode
 #endif
 	    | L2_S_PROT(PTE_KERNEL, VM_PROT_READ);
 	*dst_ptep = L2_S_PROTO | dst |
 	    L2_S_PROT(PTE_KERNEL, VM_PROT_WRITE) | pte_l2_s_cache_mode;
 	PTE_SYNC(src_ptep);
 	PTE_SYNC(dst_ptep);
 	cpu_tlb_flushD_SE(csrcp + src_va_offset);
 	cpu_tlb_flushD_SE(cdstp + dst_va_offset);
 	cpu_cpwait();
 	bcopy_page(csrcp + src_va_offset, cdstp + dst_va_offset);
 #ifdef PMAP_CACHE_VIVT
 	cpu_dcache_inv_range(csrcp + src_va_offset, PAGE_SIZE);
 #endif
 	simple_unlock(&src_pg->mdpage.pvh_slock); /* cache is safe again */
 #ifdef PMAP_CACHE_VIVT
 	cpu_dcache_wbinv_range(cdstp + dst_va_offset, PAGE_SIZE);
 #endif
 	/*
 	 * Unmap the pages.
 	 */
 	*src_ptep = 0;
 	*dst_ptep = 0;
 	PTE_SYNC(src_ptep);
 	PTE_SYNC(dst_ptep);
 	cpu_tlb_flushD_SE(csrcp + src_va_offset);
 	cpu_tlb_flushD_SE(cdstp + dst_va_offset);
 #ifdef PMAP_CACHE_VIPT
 	/*
 	 * Now that the destination page is in the cache, mark it as colored.
 	 * If this was an exec page, discard it.
 	 */
 	if (!pmap_is_page_colored_p(dst_pg)) {
 		PMAPCOUNT(vac_color_new);
 		dst_pg->mdpage.pvh_attrs |= PVF_COLORED;
+	}
 	if (PV_IS_EXEC_P(dst_pg->mdpage.pvh_attrs)) {
 		dst_pg->mdpage.pvh_attrs &= ~PVF_EXEC;
 		PMAPCOUNT(exec_discarded_copy);
+	}
 	dst_pg->mdpage.pvh_attrs |= PVF_DIRTY;
 #endif
+}
 #endif /* (ARM_MMU_GENERIC + ARM_MMU_SA1 + ARM_MMU_V6) != 0 */
 #if ARM_MMU_XSCALE == 1
 void
 pmap_copy_page_xscale(paddr_t src, paddr_t dst)
+{
 	struct vm_page *src_pg = PHYS_TO_VM_PAGE(src);
 #ifdef DEBUG
 	struct vm_page *dst_pg = PHYS_TO_VM_PAGE(dst);
 	if (!SLIST_EMPTY(&dst_pg->mdpage.pvh_list))
 		panic("pmap_copy_page: dst page has mappings");
 #endif
 	KDASSERT((src & PGOFSET) == 0);
 	KDASSERT((dst & PGOFSET) == 0);
 	/*
 	 * Clean the source page.  Hold the source page's lock for
 	 * the duration of the copy so that no other mappings can
 	 * be created while we have a potentially aliased mapping.
 	 */
 	simple_lock(&src_pg->mdpage.pvh_slock);
 #ifdef PMAP_CACHE_VIVT
 	(void) pmap_clean_page(SLIST_FIRST(&src_pg->mdpage.pvh_list), true);
 #endif
 	/*
 	 * Map the pages into the page hook points, copy them, and purge
 	 * the cache for the appropriate page. Invalidate the TLB
 	 * as required.
 	 */
 	*csrc_pte = L2_S_PROTO | src |
 	    L2_S_PROT(PTE_KERNEL, VM_PROT_READ) |
 	    L2_C | L2_XS_T_TEX(TEX_XSCALE_X);	/* mini-data */
 	PTE_SYNC(csrc_pte);
 	*cdst_pte = L2_S_PROTO | dst |
 	    L2_S_PROT(PTE_KERNEL, VM_PROT_WRITE) |
 	    L2_C | L2_XS_T_TEX(TEX_XSCALE_X);	/* mini-data */
 	PTE_SYNC(cdst_pte);
 	cpu_tlb_flushD_SE(csrcp);
 	cpu_tlb_flushD_SE(cdstp);
 	cpu_cpwait();
 	bcopy_page(csrcp, cdstp);
 	simple_unlock(&src_pg->mdpage.pvh_slock); /* cache is safe again */
 	xscale_cache_clean_minidata();
+}
 #endif /* ARM_MMU_XSCALE == 1 */
 /*
  * void pmap_virtual_space(vaddr_t *start, vaddr_t *end)
+ *
  * Return the start and end addresses of the kernel's virtual space.
  * These values are setup in pmap_bootstrap and are updated as pages
  * are allocated.
  */
 void
 pmap_virtual_space(vaddr_t *start, vaddr_t *end)
+{
 	*start = virtual_avail;
 	*end = virtual_end;
+}
 /*
  * Helper function for pmap_grow_l2_bucket()
  */
 static inline int
 pmap_grow_map(vaddr_t va, pt_entry_t cache_mode, paddr_t *pap)
+{
 	struct l2_bucket *l2b;
 	pt_entry_t *ptep;
 	paddr_t pa;
 	if (uvm.page_init_done == false) {
 #ifdef PMAP_STEAL_MEMORY
 		pv_addr_t pv;
 		pmap_boot_pagealloc(PAGE_SIZE,
 #ifdef PMAP_CACHE_VIPT
 		    arm_cache_prefer_mask,
 		    va & arm_cache_prefer_mask,
 #else
 , 0,
 #endif
 		    &pv);
 		pa = pv.pv_pa;
 #else
 		if (uvm_page_physget(&pa) == false)
 			return (1);
 #endif	/* PMAP_STEAL_MEMORY */
 	} else {
 		struct vm_page *pg;
 		pg = uvm_pagealloc(NULL, 0, NULL, UVM_PGA_USERESERVE);
 		if (pg == NULL)
 			return (1);
 		pa = VM_PAGE_TO_PHYS(pg);
 #ifdef PMAP_CACHE_VIPT
 		/*
 		 * This new page must not have any mappings.  Enter it via
 		 * pmap_kenter_pa and let that routine do the hard work.
 		 */
 		KASSERT(SLIST_EMPTY(&pg->mdpage.pvh_list));
 		pmap_kenter_pa(va, pa, VM_PROT_READ|VM_PROT_WRITE|PMAP_KMPAGE);
 #endif
+	}
 	if (pap)
 		*pap = pa;
 	PMAPCOUNT(pt_mappings);
 	l2b = pmap_get_l2_bucket(pmap_kernel(), va);
 	KDASSERT(l2b != NULL);
 	ptep = &l2b->l2b_kva[l2pte_index(va)];
 	*ptep = L2_S_PROTO | pa | cache_mode |
 	    L2_S_PROT(PTE_KERNEL, VM_PROT_READ | VM_PROT_WRITE);
 	PTE_SYNC(ptep);
 	memset((void *)va, 0, PAGE_SIZE);
 	return (0);
+}
 /*
  * This is the same as pmap_alloc_l2_bucket(), except that it is only
  * used by pmap_growkernel().
  */
 static inline struct l2_bucket *
 pmap_grow_l2_bucket(pmap_t pm, vaddr_t va)
+{
 	struct l2_dtable *l2;
 	struct l2_bucket *l2b;
 	u_short l1idx;
 	vaddr_t nva;
 	l1idx = L1_IDX(va);
 	if ((l2 = pm->pm_l2[L2_IDX(l1idx)]) == NULL) {
 		/*
 		 * No mapping at this address, as there is
 		 * no entry in the L1 table.
 		 * Need to allocate a new l2_dtable.
 		 */
 		nva = pmap_kernel_l2dtable_kva;
 		if ((nva & PGOFSET) == 0) {
 			/*
 			 * Need to allocate a backing page
 			 */
 			if (pmap_grow_map(nva, pte_l2_s_cache_mode, NULL))
 				return (NULL);
+		}
 		l2 = (struct l2_dtable *)nva;
 		nva += sizeof(struct l2_dtable);
 		if ((nva & PGOFSET) < (pmap_kernel_l2dtable_kva & PGOFSET)) {
 			/*
 			 * The new l2_dtable straddles a page boundary.
 			 * Map in another page to cover it.
 			 */
 			if (pmap_grow_map(nva, pte_l2_s_cache_mode, NULL))
 				return (NULL);
+		}
 		pmap_kernel_l2dtable_kva = nva;
 		/*
 		 * Link it into the parent pmap
 		 */
 		pm->pm_l2[L2_IDX(l1idx)] = l2;
+	}
 	l2b = &l2->l2_bucket[L2_BUCKET(l1idx)];
 	/*
 	 * Fetch pointer to the L2 page table associated with the address.
 	 */
 	if (l2b->l2b_kva == NULL) {
 		pt_entry_t *ptep;
 		/*
 		 * No L2 page table has been allocated. Chances are, this
 		 * is because we just allocated the l2_dtable, above.
 		 */
 		nva = pmap_kernel_l2ptp_kva;
 		ptep = (pt_entry_t *)nva;
 		if ((nva & PGOFSET) == 0) {
 			/*
 			 * Need to allocate a backing page
 			 */
 			if (pmap_grow_map(nva, pte_l2_s_cache_mode_pt,
 			    &pmap_kernel_l2ptp_phys))
 				return (NULL);
 			PTE_SYNC_RANGE(ptep, PAGE_SIZE / sizeof(pt_entry_t));
+		}
 		l2->l2_occupancy++;
 		l2b->l2b_kva = ptep;
 		l2b->l2b_l1idx = l1idx;
 		l2b->l2b_phys = pmap_kernel_l2ptp_phys;
 		pmap_kernel_l2ptp_kva += L2_TABLE_SIZE_REAL;
 		pmap_kernel_l2ptp_phys += L2_TABLE_SIZE_REAL;
+	}
 	return (l2b);
+}
 vaddr_t
 pmap_growkernel(vaddr_t maxkvaddr)
+{
 	pmap_t kpm = pmap_kernel();
 	struct l1_ttable *l1;
 	struct l2_bucket *l2b;
 	pd_entry_t *pl1pd;
 	int s;
 	if (maxkvaddr <= pmap_curmaxkvaddr)
 		goto out;		/* we are OK */
 	NPDEBUG(PDB_GROWKERN,
 	    printf("pmap_growkernel: growing kernel from 0x%lx to 0x%lx\n",
 	    pmap_curmaxkvaddr, maxkvaddr));
 	KDASSERT(maxkvaddr <= virtual_end);
 	/*
 	 * whoops!   we need to add kernel PTPs
 	 */
 	s = splhigh();	/* to be safe */
 	mutex_enter(&kpm->pm_lock);
 	/* Map 1MB at a time */
 	for (; pmap_curmaxkvaddr < maxkvaddr; pmap_curmaxkvaddr += L1_S_SIZE) {
 		l2b = pmap_grow_l2_bucket(kpm, pmap_curmaxkvaddr);
 		KDASSERT(l2b != NULL);
 		/* Distribute new L1 entry to all other L1s */
 		SLIST_FOREACH(l1, &l1_list, l1_link) {
 			pl1pd = &l1->l1_kva[L1_IDX(pmap_curmaxkvaddr)];
 			*pl1pd = l2b->l2b_phys | L1_C_DOM(PMAP_DOMAIN_KERNEL) |
 			    L1_C_PROTO;
 			PTE_SYNC(pl1pd);
+		}
+	}
 	/*
 	 * flush out the cache, expensive but growkernel will happen so
 	 * rarely
 	 */
 	cpu_dcache_wbinv_all();
 	cpu_tlb_flushD();
 	cpu_cpwait();
 	mutex_exit(&kpm->pm_lock);
 	splx(s);
 out:
 	return (pmap_curmaxkvaddr);
+}
 /************************ Utility routines ****************************/
 /*
  * vector_page_setprot:
+ *
  *	Manipulate the protection of the vector page.
  */
 void
 vector_page_setprot(int prot)
+{
 	struct l2_bucket *l2b;
 	pt_entry_t *ptep;
 	l2b = pmap_get_l2_bucket(pmap_kernel(), vector_page);
 	KDASSERT(l2b != NULL);
 	ptep = &l2b->l2b_kva[l2pte_index(vector_page)];
 	*ptep = (*ptep & ~L1_S_PROT_MASK) | L2_S_PROT(PTE_KERNEL, prot);
 	PTE_SYNC(ptep);
 	cpu_tlb_flushD_SE(vector_page);
 	cpu_cpwait();
+}
 /*
  * Fetch pointers to the PDE/PTE for the given pmap/VA pair.
  * Returns true if the mapping exists, else false.
+ *
  * NOTE: This function is only used by a couple of arm-specific modules.
  * It is not safe to take any pmap locks here, since we could be right
  * in the middle of debugging the pmap anyway...
+ *
  * It is possible for this routine to return false even though a valid
  * mapping does exist. This is because we don't lock, so the metadata
  * state may be inconsistent.
+ *
  * NOTE: We can return a NULL *ptp in the case where the L1 pde is
  * a "section" mapping.
  */
 bool
 pmap_get_pde_pte(pmap_t pm, vaddr_t va, pd_entry_t **pdp, pt_entry_t **ptp)
+{
 	struct l2_dtable *l2;
 	pd_entry_t *pl1pd, l1pd;
 	pt_entry_t *ptep;
 	u_short l1idx;
 	if (pm->pm_l1 == NULL)
 		return false;
 	l1idx = L1_IDX(va);
 	*pdp = pl1pd = &pm->pm_l1->l1_kva[l1idx];
 	l1pd = *pl1pd;
 	if (l1pte_section_p(l1pd)) {
 		*ptp = NULL;
 		return true;
+	}
 	if (pm->pm_l2 == NULL)
 		return false;
 	l2 = pm->pm_l2[L2_IDX(l1idx)];
 	if (l2 == NULL ||
 	    (ptep = l2->l2_bucket[L2_BUCKET(l1idx)].l2b_kva) == NULL) {
 		return false;
+	}
 	*ptp = &ptep[l2pte_index(va)];
 	return true;
+}
 bool
 pmap_get_pde(pmap_t pm, vaddr_t va, pd_entry_t **pdp)
+{
 	u_short l1idx;
 	if (pm->pm_l1 == NULL)
 		return false;
 	l1idx = L1_IDX(va);
 	*pdp = &pm->pm_l1->l1_kva[l1idx];
 	return true;
+}
 /************************ Bootstrapping routines ****************************/
 static void
 pmap_init_l1(struct l1_ttable *l1, pd_entry_t *l1pt)
+{
 	int i;
 	l1->l1_kva = l1pt;
 	l1->l1_domain_use_count = 0;
 	l1->l1_domain_first = 0;
 	for (i = 0; i < PMAP_DOMAINS; i++)
 		l1->l1_domain_free[i] = i + 1;
 	/*
 	 * Copy the kernel's L1 entries to each new L1.
 	 */
 	if (pmap_initialized)
 		memcpy(l1pt, pmap_kernel()->pm_l1->l1_kva, L1_TABLE_SIZE);
 	if (pmap_extract(pmap_kernel(), (vaddr_t)l1pt,
 	    &l1->l1_physaddr) == false)
 		panic("pmap_init_l1: can't get PA of L1 at %p", l1pt);
 	SLIST_INSERT_HEAD(&l1_list, l1, l1_link);
 	TAILQ_INSERT_TAIL(&l1_lru_list, l1, l1_lru);
+}
 /*
  * pmap_bootstrap() is called from the board-specific initarm() routine
  * once the kernel L1/L2 descriptors tables have been set up.
+ *
  * This is a somewhat convoluted process since pmap bootstrap is, effectively,
  * spread over a number of disparate files/functions.
+ *
  * We are passed the following parameters
  *  - kernel_l1pt
  *    This is a pointer to the base of the kernel's L1 translation table.
  *  - vstart
  *    1MB-aligned start of managed kernel virtual memory.
  *  - vend
  *    1MB-aligned end of managed kernel virtual memory.
+ *
  * We use the first parameter to build the metadata (struct l1_ttable and
  * struct l2_dtable) necessary to track kernel mappings.
  */
 #define	PMAP_STATIC_L2_SIZE 16
 void
 pmap_bootstrap(vaddr_t vstart, vaddr_t vend)
+{
 	static struct l1_ttable static_l1;
 	static struct l2_dtable static_l2[PMAP_STATIC_L2_SIZE];
 	struct l1_ttable *l1 = &static_l1;
 	struct l2_dtable *l2;
 	struct l2_bucket *l2b;
 	pd_entry_t *l1pt = (pd_entry_t *) kernel_l1pt.pv_va;
 	pmap_t pm = pmap_kernel();
 	pd_entry_t pde;
 	pt_entry_t *ptep;
 	paddr_t pa;
 	vaddr_t va;
 	vsize_t size;
 	int nptes, l1idx, l2idx, l2next = 0;
 	/*
 	 * Initialise the kernel pmap object
 	 */
 	pm->pm_l1 = l1;
 	pm->pm_domain = PMAP_DOMAIN_KERNEL;
 	pm->pm_activated = true;
 	pm->pm_cstate.cs_all = PMAP_CACHE_STATE_ALL;
 	UVM_OBJ_INIT(&pm->pm_obj, NULL, 1);
 	/*
 	 * Scan the L1 translation table created by initarm() and create
 	 * the required metadata for all valid mappings found in it.
 	 */
 	for (l1idx = 0; l1idx < (L1_TABLE_SIZE / sizeof(pd_entry_t)); l1idx++) {
 		pde = l1pt[l1idx];
 		/*
 		 * We're only interested in Coarse mappings.
 		 * pmap_extract() can deal with section mappings without
 		 * recourse to checking L2 metadata.
 		 */
 		if ((pde & L1_TYPE_MASK) != L1_TYPE_C)
 			continue;
 		/*
 		 * Lookup the KVA of this L2 descriptor table
 		 */
 		pa = (paddr_t)(pde & L1_C_ADDR_MASK);
 		ptep = (pt_entry_t *)kernel_pt_lookup(pa);
 		if (ptep == NULL) {
 			panic("pmap_bootstrap: No L2 for va 0x%x, pa 0x%lx",
 			    (u_int)l1idx << L1_S_SHIFT, pa);
+		}
 		/*
 		 * Fetch the associated L2 metadata structure.
 		 * Allocate a new one if necessary.
 		 */
 		if ((l2 = pm->pm_l2[L2_IDX(l1idx)]) == NULL) {
 			if (l2next == PMAP_STATIC_L2_SIZE)
 				panic("pmap_bootstrap: out of static L2s");
 			pm->pm_l2[L2_IDX(l1idx)] = l2 = &static_l2[l2next++];
+		}
 		/*
 		 * One more L1 slot tracked...
 		 */
 		l2->l2_occupancy++;
 		/*
 		 * Fill in the details of the L2 descriptor in the
 		 * appropriate bucket.
 		 */
 		l2b = &l2->l2_bucket[L2_BUCKET(l1idx)];
 		l2b->l2b_kva = ptep;
 		l2b->l2b_phys = pa;
 		l2b->l2b_l1idx = l1idx;
 		/*
 		 * Establish an initial occupancy count for this descriptor
 		 */
 		for (l2idx = 0;
 		    l2idx < (L2_TABLE_SIZE_REAL / sizeof(pt_entry_t));
 		    l2idx++) {
 			if ((ptep[l2idx] & L2_TYPE_MASK) != L2_TYPE_INV) {
 				l2b->l2b_occupancy++;
+			}
+		}
 		/*
 		 * Make sure the descriptor itself has the correct cache mode.
 		 * If not, fix it, but whine about the problem. Port-meisters
 		 * should consider this a clue to fix up their initarm()
 		 * function. :)
 		 */
 		if (pmap_set_pt_cache_mode(l1pt, (vaddr_t)ptep)) {