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uvm_km.c revision 1.101.4.2.4.1
      1  1.101.4.2.4.1      matt /*	$NetBSD: uvm_km.c,v 1.101.4.2.4.1 2010/01/09 05:54:40 matt Exp $	*/
      2            1.1       mrg 
      3           1.47       chs /*
      4            1.1       mrg  * Copyright (c) 1997 Charles D. Cranor and Washington University.
      5           1.47       chs  * Copyright (c) 1991, 1993, The Regents of the University of California.
      6            1.1       mrg  *
      7            1.1       mrg  * All rights reserved.
      8            1.1       mrg  *
      9            1.1       mrg  * This code is derived from software contributed to Berkeley by
     10            1.1       mrg  * The Mach Operating System project at Carnegie-Mellon University.
     11            1.1       mrg  *
     12            1.1       mrg  * Redistribution and use in source and binary forms, with or without
     13            1.1       mrg  * modification, are permitted provided that the following conditions
     14            1.1       mrg  * are met:
     15            1.1       mrg  * 1. Redistributions of source code must retain the above copyright
     16            1.1       mrg  *    notice, this list of conditions and the following disclaimer.
     17            1.1       mrg  * 2. Redistributions in binary form must reproduce the above copyright
     18            1.1       mrg  *    notice, this list of conditions and the following disclaimer in the
     19            1.1       mrg  *    documentation and/or other materials provided with the distribution.
     20            1.1       mrg  * 3. All advertising materials mentioning features or use of this software
     21            1.1       mrg  *    must display the following acknowledgement:
     22            1.1       mrg  *	This product includes software developed by Charles D. Cranor,
     23           1.47       chs  *      Washington University, the University of California, Berkeley and
     24            1.1       mrg  *      its contributors.
     25            1.1       mrg  * 4. Neither the name of the University nor the names of its contributors
     26            1.1       mrg  *    may be used to endorse or promote products derived from this software
     27            1.1       mrg  *    without specific prior written permission.
     28            1.1       mrg  *
     29            1.1       mrg  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     30            1.1       mrg  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     31            1.1       mrg  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     32            1.1       mrg  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     33            1.1       mrg  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     34            1.1       mrg  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     35            1.1       mrg  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     36            1.1       mrg  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     37            1.1       mrg  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     38            1.1       mrg  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     39            1.1       mrg  * SUCH DAMAGE.
     40            1.1       mrg  *
     41            1.1       mrg  *	@(#)vm_kern.c   8.3 (Berkeley) 1/12/94
     42            1.4       mrg  * from: Id: uvm_km.c,v 1.1.2.14 1998/02/06 05:19:27 chs Exp
     43            1.1       mrg  *
     44            1.1       mrg  *
     45            1.1       mrg  * Copyright (c) 1987, 1990 Carnegie-Mellon University.
     46            1.1       mrg  * All rights reserved.
     47           1.47       chs  *
     48            1.1       mrg  * Permission to use, copy, modify and distribute this software and
     49            1.1       mrg  * its documentation is hereby granted, provided that both the copyright
     50            1.1       mrg  * notice and this permission notice appear in all copies of the
     51            1.1       mrg  * software, derivative works or modified versions, and any portions
     52            1.1       mrg  * thereof, and that both notices appear in supporting documentation.
     53           1.47       chs  *
     54           1.47       chs  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     55           1.47       chs  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     56            1.1       mrg  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     57           1.47       chs  *
     58            1.1       mrg  * Carnegie Mellon requests users of this software to return to
     59            1.1       mrg  *
     60            1.1       mrg  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     61            1.1       mrg  *  School of Computer Science
     62            1.1       mrg  *  Carnegie Mellon University
     63            1.1       mrg  *  Pittsburgh PA 15213-3890
     64            1.1       mrg  *
     65            1.1       mrg  * any improvements or extensions that they make and grant Carnegie the
     66            1.1       mrg  * rights to redistribute these changes.
     67            1.1       mrg  */
     68            1.6       mrg 
     69            1.1       mrg /*
     70            1.1       mrg  * uvm_km.c: handle kernel memory allocation and management
     71            1.1       mrg  */
     72            1.1       mrg 
     73            1.7     chuck /*
     74            1.7     chuck  * overview of kernel memory management:
     75            1.7     chuck  *
     76            1.7     chuck  * the kernel virtual address space is mapped by "kernel_map."   kernel_map
     77           1.62   thorpej  * starts at VM_MIN_KERNEL_ADDRESS and goes to VM_MAX_KERNEL_ADDRESS.
     78           1.62   thorpej  * note that VM_MIN_KERNEL_ADDRESS is equal to vm_map_min(kernel_map).
     79            1.7     chuck  *
     80           1.47       chs  * the kernel_map has several "submaps."   submaps can only appear in
     81            1.7     chuck  * the kernel_map (user processes can't use them).   submaps "take over"
     82            1.7     chuck  * the management of a sub-range of the kernel's address space.  submaps
     83            1.7     chuck  * are typically allocated at boot time and are never released.   kernel
     84           1.47       chs  * virtual address space that is mapped by a submap is locked by the
     85            1.7     chuck  * submap's lock -- not the kernel_map's lock.
     86            1.7     chuck  *
     87            1.7     chuck  * thus, the useful feature of submaps is that they allow us to break
     88            1.7     chuck  * up the locking and protection of the kernel address space into smaller
     89            1.7     chuck  * chunks.
     90            1.7     chuck  *
     91            1.7     chuck  * the vm system has several standard kernel submaps, including:
     92            1.7     chuck  *   kmem_map => contains only wired kernel memory for the kernel
     93           1.97        ad  *		malloc.
     94           1.97        ad  *   mb_map => memory for large mbufs,
     95            1.7     chuck  *   pager_map => used to map "buf" structures into kernel space
     96            1.7     chuck  *   exec_map => used during exec to handle exec args
     97            1.7     chuck  *   etc...
     98            1.7     chuck  *
     99            1.7     chuck  * the kernel allocates its private memory out of special uvm_objects whose
    100            1.7     chuck  * reference count is set to UVM_OBJ_KERN (thus indicating that the objects
    101            1.7     chuck  * are "special" and never die).   all kernel objects should be thought of
    102           1.47       chs  * as large, fixed-sized, sparsely populated uvm_objects.   each kernel
    103           1.62   thorpej  * object is equal to the size of kernel virtual address space (i.e. the
    104           1.62   thorpej  * value "VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS").
    105            1.7     chuck  *
    106          1.101     pooka  * note that just because a kernel object spans the entire kernel virtual
    107            1.7     chuck  * address space doesn't mean that it has to be mapped into the entire space.
    108           1.47       chs  * large chunks of a kernel object's space go unused either because
    109           1.47       chs  * that area of kernel VM is unmapped, or there is some other type of
    110            1.7     chuck  * object mapped into that range (e.g. a vnode).    for submap's kernel
    111            1.7     chuck  * objects, the only part of the object that can ever be populated is the
    112            1.7     chuck  * offsets that are managed by the submap.
    113            1.7     chuck  *
    114            1.7     chuck  * note that the "offset" in a kernel object is always the kernel virtual
    115           1.62   thorpej  * address minus the VM_MIN_KERNEL_ADDRESS (aka vm_map_min(kernel_map)).
    116            1.7     chuck  * example:
    117           1.62   thorpej  *   suppose VM_MIN_KERNEL_ADDRESS is 0xf8000000 and the kernel does a
    118            1.7     chuck  *   uvm_km_alloc(kernel_map, PAGE_SIZE) [allocate 1 wired down page in the
    119            1.7     chuck  *   kernel map].    if uvm_km_alloc returns virtual address 0xf8235000,
    120            1.7     chuck  *   then that means that the page at offset 0x235000 in kernel_object is
    121           1.47       chs  *   mapped at 0xf8235000.
    122            1.7     chuck  *
    123            1.7     chuck  * kernel object have one other special property: when the kernel virtual
    124            1.7     chuck  * memory mapping them is unmapped, the backing memory in the object is
    125            1.7     chuck  * freed right away.   this is done with the uvm_km_pgremove() function.
    126            1.7     chuck  * this has to be done because there is no backing store for kernel pages
    127            1.7     chuck  * and no need to save them after they are no longer referenced.
    128            1.7     chuck  */
    129           1.55     lukem 
    130           1.55     lukem #include <sys/cdefs.h>
    131  1.101.4.2.4.1      matt __KERNEL_RCSID(0, "$NetBSD: uvm_km.c,v 1.101.4.2.4.1 2010/01/09 05:54:40 matt Exp $");
    132           1.55     lukem 
    133           1.55     lukem #include "opt_uvmhist.h"
    134            1.7     chuck 
    135            1.1       mrg #include <sys/param.h>
    136           1.71      yamt #include <sys/malloc.h>
    137            1.1       mrg #include <sys/systm.h>
    138            1.1       mrg #include <sys/proc.h>
    139           1.72      yamt #include <sys/pool.h>
    140            1.1       mrg 
    141            1.1       mrg #include <uvm/uvm.h>
    142            1.1       mrg 
    143            1.1       mrg /*
    144            1.1       mrg  * global data structures
    145            1.1       mrg  */
    146            1.1       mrg 
    147           1.49       chs struct vm_map *kernel_map = NULL;
    148            1.1       mrg 
    149            1.1       mrg /*
    150            1.1       mrg  * local data structues
    151            1.1       mrg  */
    152            1.1       mrg 
    153           1.71      yamt static struct vm_map_kernel	kernel_map_store;
    154           1.70      yamt static struct vm_map_entry	kernel_first_mapent_store;
    155            1.1       mrg 
    156           1.72      yamt #if !defined(PMAP_MAP_POOLPAGE)
    157           1.72      yamt 
    158           1.72      yamt /*
    159           1.72      yamt  * kva cache
    160           1.72      yamt  *
    161           1.72      yamt  * XXX maybe it's better to do this at the uvm_map layer.
    162           1.72      yamt  */
    163           1.72      yamt 
    164           1.72      yamt #define	KM_VACACHE_SIZE	(32 * PAGE_SIZE) /* XXX tune */
    165           1.72      yamt 
    166           1.72      yamt static void *km_vacache_alloc(struct pool *, int);
    167           1.72      yamt static void km_vacache_free(struct pool *, void *);
    168           1.72      yamt static void km_vacache_init(struct vm_map *, const char *, size_t);
    169           1.72      yamt 
    170           1.72      yamt /* XXX */
    171           1.72      yamt #define	KM_VACACHE_POOL_TO_MAP(pp) \
    172           1.72      yamt 	((struct vm_map *)((char *)(pp) - \
    173           1.72      yamt 	    offsetof(struct vm_map_kernel, vmk_vacache)))
    174           1.72      yamt 
    175           1.72      yamt static void *
    176           1.72      yamt km_vacache_alloc(struct pool *pp, int flags)
    177           1.72      yamt {
    178           1.72      yamt 	vaddr_t va;
    179           1.72      yamt 	size_t size;
    180           1.72      yamt 	struct vm_map *map;
    181           1.72      yamt 	size = pp->pr_alloc->pa_pagesz;
    182           1.72      yamt 
    183           1.72      yamt 	map = KM_VACACHE_POOL_TO_MAP(pp);
    184           1.72      yamt 
    185           1.73      yamt 	va = vm_map_min(map); /* hint */
    186           1.72      yamt 	if (uvm_map(map, &va, size, NULL, UVM_UNKNOWN_OFFSET, size,
    187           1.74      yamt 	    UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_NONE,
    188           1.72      yamt 	    UVM_ADV_RANDOM, UVM_FLAG_QUANTUM |
    189           1.88      yamt 	    ((flags & PR_WAITOK) ? UVM_FLAG_WAITVA :
    190           1.88      yamt 	    UVM_FLAG_TRYLOCK | UVM_FLAG_NOWAIT))))
    191           1.72      yamt 		return NULL;
    192           1.72      yamt 
    193           1.72      yamt 	return (void *)va;
    194           1.72      yamt }
    195           1.72      yamt 
    196           1.72      yamt static void
    197           1.72      yamt km_vacache_free(struct pool *pp, void *v)
    198           1.72      yamt {
    199           1.72      yamt 	vaddr_t va = (vaddr_t)v;
    200           1.72      yamt 	size_t size = pp->pr_alloc->pa_pagesz;
    201           1.72      yamt 	struct vm_map *map;
    202           1.72      yamt 
    203           1.72      yamt 	map = KM_VACACHE_POOL_TO_MAP(pp);
    204           1.78      yamt 	uvm_unmap1(map, va, va + size, UVM_FLAG_QUANTUM|UVM_FLAG_VAONLY);
    205           1.72      yamt }
    206           1.72      yamt 
    207           1.72      yamt /*
    208           1.72      yamt  * km_vacache_init: initialize kva cache.
    209           1.72      yamt  */
    210           1.72      yamt 
    211           1.72      yamt static void
    212           1.72      yamt km_vacache_init(struct vm_map *map, const char *name, size_t size)
    213           1.72      yamt {
    214           1.72      yamt 	struct vm_map_kernel *vmk;
    215           1.72      yamt 	struct pool *pp;
    216           1.72      yamt 	struct pool_allocator *pa;
    217           1.94        ad 	int ipl;
    218           1.72      yamt 
    219           1.72      yamt 	KASSERT(VM_MAP_IS_KERNEL(map));
    220           1.72      yamt 	KASSERT(size < (vm_map_max(map) - vm_map_min(map)) / 2); /* sanity */
    221           1.72      yamt 
    222           1.97        ad 
    223           1.72      yamt 	vmk = vm_map_to_kernel(map);
    224           1.72      yamt 	pp = &vmk->vmk_vacache;
    225           1.72      yamt 	pa = &vmk->vmk_vacache_allocator;
    226           1.72      yamt 	memset(pa, 0, sizeof(*pa));
    227           1.72      yamt 	pa->pa_alloc = km_vacache_alloc;
    228           1.72      yamt 	pa->pa_free = km_vacache_free;
    229           1.72      yamt 	pa->pa_pagesz = (unsigned int)size;
    230           1.88      yamt 	pa->pa_backingmap = map;
    231           1.88      yamt 	pa->pa_backingmapptr = NULL;
    232           1.94        ad 
    233           1.94        ad 	if ((map->flags & VM_MAP_INTRSAFE) != 0)
    234           1.94        ad 		ipl = IPL_VM;
    235           1.94        ad 	else
    236           1.94        ad 		ipl = IPL_NONE;
    237           1.94        ad 
    238           1.94        ad 	pool_init(pp, PAGE_SIZE, 0, 0, PR_NOTOUCH | PR_RECURSIVE, name, pa,
    239           1.94        ad 	    ipl);
    240           1.72      yamt }
    241           1.72      yamt 
    242           1.72      yamt void
    243           1.72      yamt uvm_km_vacache_init(struct vm_map *map, const char *name, size_t size)
    244           1.72      yamt {
    245           1.72      yamt 
    246           1.72      yamt 	map->flags |= VM_MAP_VACACHE;
    247           1.72      yamt 	if (size == 0)
    248           1.72      yamt 		size = KM_VACACHE_SIZE;
    249           1.72      yamt 	km_vacache_init(map, name, size);
    250           1.72      yamt }
    251           1.72      yamt 
    252           1.72      yamt #else /* !defined(PMAP_MAP_POOLPAGE) */
    253           1.72      yamt 
    254           1.72      yamt void
    255           1.92      yamt uvm_km_vacache_init(struct vm_map *map, const char *name, size_t size)
    256           1.72      yamt {
    257           1.72      yamt 
    258           1.72      yamt 	/* nothing */
    259           1.72      yamt }
    260           1.72      yamt 
    261           1.72      yamt #endif /* !defined(PMAP_MAP_POOLPAGE) */
    262           1.72      yamt 
    263           1.88      yamt void
    264           1.92      yamt uvm_km_va_drain(struct vm_map *map, uvm_flag_t flags)
    265           1.88      yamt {
    266           1.88      yamt 	struct vm_map_kernel *vmk = vm_map_to_kernel(map);
    267           1.88      yamt 
    268           1.88      yamt 	callback_run_roundrobin(&vmk->vmk_reclaim_callback, NULL);
    269           1.88      yamt }
    270           1.88      yamt 
    271            1.1       mrg /*
    272            1.1       mrg  * uvm_km_init: init kernel maps and objects to reflect reality (i.e.
    273            1.1       mrg  * KVM already allocated for text, data, bss, and static data structures).
    274            1.1       mrg  *
    275           1.62   thorpej  * => KVM is defined by VM_MIN_KERNEL_ADDRESS/VM_MAX_KERNEL_ADDRESS.
    276           1.82  christos  *    we assume that [vmin -> start] has already been allocated and that
    277           1.62   thorpej  *    "end" is the end.
    278            1.1       mrg  */
    279            1.1       mrg 
    280            1.8       mrg void
    281           1.83   thorpej uvm_km_init(vaddr_t start, vaddr_t end)
    282            1.1       mrg {
    283           1.62   thorpej 	vaddr_t base = VM_MIN_KERNEL_ADDRESS;
    284           1.27   thorpej 
    285           1.27   thorpej 	/*
    286           1.27   thorpej 	 * next, init kernel memory objects.
    287            1.8       mrg 	 */
    288            1.1       mrg 
    289            1.8       mrg 	/* kernel_object: for pageable anonymous kernel memory */
    290           1.34       chs 	uao_init();
    291           1.95        ad 	uvm_kernel_object = uao_create(VM_MAX_KERNEL_ADDRESS -
    292           1.62   thorpej 				 VM_MIN_KERNEL_ADDRESS, UAO_FLAG_KERNOBJ);
    293            1.1       mrg 
    294           1.24   thorpej 	/*
    295           1.56   thorpej 	 * init the map and reserve any space that might already
    296           1.56   thorpej 	 * have been allocated kernel space before installing.
    297            1.8       mrg 	 */
    298            1.1       mrg 
    299           1.71      yamt 	uvm_map_setup_kernel(&kernel_map_store, base, end, VM_MAP_PAGEABLE);
    300           1.71      yamt 	kernel_map_store.vmk_map.pmap = pmap_kernel();
    301           1.70      yamt 	if (start != base) {
    302           1.70      yamt 		int error;
    303           1.70      yamt 		struct uvm_map_args args;
    304           1.70      yamt 
    305           1.71      yamt 		error = uvm_map_prepare(&kernel_map_store.vmk_map,
    306           1.71      yamt 		    base, start - base,
    307           1.70      yamt 		    NULL, UVM_UNKNOWN_OFFSET, 0,
    308           1.62   thorpej 		    UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_NONE,
    309           1.70      yamt 		    		UVM_ADV_RANDOM, UVM_FLAG_FIXED), &args);
    310           1.70      yamt 		if (!error) {
    311           1.70      yamt 			kernel_first_mapent_store.flags =
    312           1.70      yamt 			    UVM_MAP_KERNEL | UVM_MAP_FIRST;
    313           1.71      yamt 			error = uvm_map_enter(&kernel_map_store.vmk_map, &args,
    314           1.70      yamt 			    &kernel_first_mapent_store);
    315           1.70      yamt 		}
    316           1.70      yamt 
    317           1.70      yamt 		if (error)
    318           1.70      yamt 			panic(
    319           1.70      yamt 			    "uvm_km_init: could not reserve space for kernel");
    320           1.70      yamt 	}
    321           1.47       chs 
    322            1.8       mrg 	/*
    323            1.8       mrg 	 * install!
    324            1.8       mrg 	 */
    325            1.8       mrg 
    326           1.71      yamt 	kernel_map = &kernel_map_store.vmk_map;
    327           1.72      yamt 	uvm_km_vacache_init(kernel_map, "kvakernel", 0);
    328            1.1       mrg }
    329            1.1       mrg 
    330            1.1       mrg /*
    331            1.1       mrg  * uvm_km_suballoc: allocate a submap in the kernel map.   once a submap
    332            1.1       mrg  * is allocated all references to that area of VM must go through it.  this
    333            1.1       mrg  * allows the locking of VAs in kernel_map to be broken up into regions.
    334            1.1       mrg  *
    335           1.82  christos  * => if `fixed' is true, *vmin specifies where the region described
    336            1.5   thorpej  *      by the submap must start
    337            1.1       mrg  * => if submap is non NULL we use that as the submap, otherwise we
    338            1.1       mrg  *	alloc a new map
    339            1.1       mrg  */
    340           1.78      yamt 
    341            1.8       mrg struct vm_map *
    342           1.83   thorpej uvm_km_suballoc(struct vm_map *map, vaddr_t *vmin /* IN/OUT */,
    343           1.93   thorpej     vaddr_t *vmax /* OUT */, vsize_t size, int flags, bool fixed,
    344           1.83   thorpej     struct vm_map_kernel *submap)
    345            1.8       mrg {
    346            1.8       mrg 	int mapflags = UVM_FLAG_NOMERGE | (fixed ? UVM_FLAG_FIXED : 0);
    347            1.1       mrg 
    348           1.71      yamt 	KASSERT(vm_map_pmap(map) == pmap_kernel());
    349           1.71      yamt 
    350            1.8       mrg 	size = round_page(size);	/* round up to pagesize */
    351           1.87      yamt 	size += uvm_mapent_overhead(size, flags);
    352            1.1       mrg 
    353            1.8       mrg 	/*
    354            1.8       mrg 	 * first allocate a blank spot in the parent map
    355            1.8       mrg 	 */
    356            1.8       mrg 
    357           1.82  christos 	if (uvm_map(map, vmin, size, NULL, UVM_UNKNOWN_OFFSET, 0,
    358            1.8       mrg 	    UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_NONE,
    359           1.43       chs 	    UVM_ADV_RANDOM, mapflags)) != 0) {
    360            1.8       mrg 	       panic("uvm_km_suballoc: unable to allocate space in parent map");
    361            1.8       mrg 	}
    362            1.8       mrg 
    363            1.8       mrg 	/*
    364           1.82  christos 	 * set VM bounds (vmin is filled in by uvm_map)
    365            1.8       mrg 	 */
    366            1.1       mrg 
    367           1.82  christos 	*vmax = *vmin + size;
    368            1.5   thorpej 
    369            1.8       mrg 	/*
    370            1.8       mrg 	 * add references to pmap and create or init the submap
    371            1.8       mrg 	 */
    372            1.1       mrg 
    373            1.8       mrg 	pmap_reference(vm_map_pmap(map));
    374            1.8       mrg 	if (submap == NULL) {
    375           1.71      yamt 		submap = malloc(sizeof(*submap), M_VMMAP, M_WAITOK);
    376            1.8       mrg 		if (submap == NULL)
    377            1.8       mrg 			panic("uvm_km_suballoc: unable to create submap");
    378            1.8       mrg 	}
    379           1.82  christos 	uvm_map_setup_kernel(submap, *vmin, *vmax, flags);
    380           1.71      yamt 	submap->vmk_map.pmap = vm_map_pmap(map);
    381            1.1       mrg 
    382            1.8       mrg 	/*
    383            1.8       mrg 	 * now let uvm_map_submap plug in it...
    384            1.8       mrg 	 */
    385            1.1       mrg 
    386           1.82  christos 	if (uvm_map_submap(map, *vmin, *vmax, &submap->vmk_map) != 0)
    387            1.8       mrg 		panic("uvm_km_suballoc: submap allocation failed");
    388            1.1       mrg 
    389           1.71      yamt 	return(&submap->vmk_map);
    390            1.1       mrg }
    391            1.1       mrg 
    392            1.1       mrg /*
    393            1.1       mrg  * uvm_km_pgremove: remove pages from a kernel uvm_object.
    394            1.1       mrg  *
    395            1.1       mrg  * => when you unmap a part of anonymous kernel memory you want to toss
    396            1.1       mrg  *    the pages right away.    (this gets called from uvm_unmap_...).
    397            1.1       mrg  */
    398            1.1       mrg 
    399            1.8       mrg void
    400           1.83   thorpej uvm_km_pgremove(vaddr_t startva, vaddr_t endva)
    401            1.1       mrg {
    402           1.95        ad 	struct uvm_object * const uobj = uvm_kernel_object;
    403           1.78      yamt 	const voff_t start = startva - vm_map_min(kernel_map);
    404           1.78      yamt 	const voff_t end = endva - vm_map_min(kernel_map);
    405           1.53       chs 	struct vm_page *pg;
    406           1.52       chs 	voff_t curoff, nextoff;
    407           1.53       chs 	int swpgonlydelta = 0;
    408            1.8       mrg 	UVMHIST_FUNC("uvm_km_pgremove"); UVMHIST_CALLED(maphist);
    409            1.1       mrg 
    410           1.78      yamt 	KASSERT(VM_MIN_KERNEL_ADDRESS <= startva);
    411           1.78      yamt 	KASSERT(startva < endva);
    412           1.86      yamt 	KASSERT(endva <= VM_MAX_KERNEL_ADDRESS);
    413           1.78      yamt 
    414           1.97        ad 	mutex_enter(&uobj->vmobjlock);
    415            1.3       chs 
    416           1.52       chs 	for (curoff = start; curoff < end; curoff = nextoff) {
    417           1.52       chs 		nextoff = curoff + PAGE_SIZE;
    418           1.52       chs 		pg = uvm_pagelookup(uobj, curoff);
    419           1.53       chs 		if (pg != NULL && pg->flags & PG_BUSY) {
    420           1.52       chs 			pg->flags |= PG_WANTED;
    421           1.52       chs 			UVM_UNLOCK_AND_WAIT(pg, &uobj->vmobjlock, 0,
    422           1.52       chs 				    "km_pgrm", 0);
    423           1.97        ad 			mutex_enter(&uobj->vmobjlock);
    424           1.52       chs 			nextoff = curoff;
    425            1.8       mrg 			continue;
    426           1.52       chs 		}
    427            1.8       mrg 
    428           1.52       chs 		/*
    429           1.52       chs 		 * free the swap slot, then the page.
    430           1.52       chs 		 */
    431            1.8       mrg 
    432           1.53       chs 		if (pg == NULL &&
    433           1.64        pk 		    uao_find_swslot(uobj, curoff >> PAGE_SHIFT) > 0) {
    434           1.53       chs 			swpgonlydelta++;
    435           1.53       chs 		}
    436           1.52       chs 		uao_dropswap(uobj, curoff >> PAGE_SHIFT);
    437           1.53       chs 		if (pg != NULL) {
    438           1.97        ad 			mutex_enter(&uvm_pageqlock);
    439           1.53       chs 			uvm_pagefree(pg);
    440           1.97        ad 			mutex_exit(&uvm_pageqlock);
    441           1.53       chs 		}
    442            1.8       mrg 	}
    443           1.97        ad 	mutex_exit(&uobj->vmobjlock);
    444            1.8       mrg 
    445           1.54       chs 	if (swpgonlydelta > 0) {
    446           1.95        ad 		mutex_enter(&uvm_swap_data_lock);
    447           1.54       chs 		KASSERT(uvmexp.swpgonly >= swpgonlydelta);
    448           1.54       chs 		uvmexp.swpgonly -= swpgonlydelta;
    449           1.95        ad 		mutex_exit(&uvm_swap_data_lock);
    450           1.54       chs 	}
    451           1.24   thorpej }
    452           1.24   thorpej 
    453           1.24   thorpej 
    454           1.24   thorpej /*
    455           1.78      yamt  * uvm_km_pgremove_intrsafe: like uvm_km_pgremove(), but for non object backed
    456           1.78      yamt  *    regions.
    457           1.24   thorpej  *
    458           1.24   thorpej  * => when you unmap a part of anonymous kernel memory you want to toss
    459           1.52       chs  *    the pages right away.    (this is called from uvm_unmap_...).
    460           1.24   thorpej  * => none of the pages will ever be busy, and none of them will ever
    461           1.52       chs  *    be on the active or inactive queues (because they have no object).
    462           1.24   thorpej  */
    463           1.24   thorpej 
    464           1.24   thorpej void
    465      1.101.4.2       snj uvm_km_pgremove_intrsafe(struct vm_map *map, vaddr_t start, vaddr_t end)
    466           1.24   thorpej {
    467           1.52       chs 	struct vm_page *pg;
    468           1.52       chs 	paddr_t pa;
    469           1.24   thorpej 	UVMHIST_FUNC("uvm_km_pgremove_intrsafe"); UVMHIST_CALLED(maphist);
    470           1.24   thorpej 
    471      1.101.4.2       snj 	KASSERT(VM_MAP_IS_KERNEL(map));
    472      1.101.4.2       snj 	KASSERT(vm_map_min(map) <= start);
    473           1.78      yamt 	KASSERT(start < end);
    474      1.101.4.2       snj 	KASSERT(end <= vm_map_max(map));
    475           1.78      yamt 
    476           1.52       chs 	for (; start < end; start += PAGE_SIZE) {
    477           1.52       chs 		if (!pmap_extract(pmap_kernel(), start, &pa)) {
    478           1.24   thorpej 			continue;
    479           1.40       chs 		}
    480           1.52       chs 		pg = PHYS_TO_VM_PAGE(pa);
    481           1.52       chs 		KASSERT(pg);
    482           1.52       chs 		KASSERT(pg->uobject == NULL && pg->uanon == NULL);
    483           1.52       chs 		uvm_pagefree(pg);
    484           1.24   thorpej 	}
    485            1.1       mrg }
    486            1.1       mrg 
    487           1.78      yamt #if defined(DEBUG)
    488           1.78      yamt void
    489      1.101.4.2       snj uvm_km_check_empty(struct vm_map *map, vaddr_t start, vaddr_t end)
    490           1.78      yamt {
    491      1.101.4.2       snj 	struct vm_page *pg;
    492           1.78      yamt 	vaddr_t va;
    493           1.78      yamt 	paddr_t pa;
    494           1.78      yamt 
    495      1.101.4.2       snj 	KDASSERT(VM_MAP_IS_KERNEL(map));
    496      1.101.4.2       snj 	KDASSERT(vm_map_min(map) <= start);
    497           1.78      yamt 	KDASSERT(start < end);
    498      1.101.4.2       snj 	KDASSERT(end <= vm_map_max(map));
    499           1.78      yamt 
    500           1.78      yamt 	for (va = start; va < end; va += PAGE_SIZE) {
    501           1.78      yamt 		if (pmap_extract(pmap_kernel(), va, &pa)) {
    502           1.81    simonb 			panic("uvm_km_check_empty: va %p has pa 0x%llx",
    503           1.81    simonb 			    (void *)va, (long long)pa);
    504           1.78      yamt 		}
    505      1.101.4.2       snj 		if ((map->flags & VM_MAP_INTRSAFE) == 0) {
    506           1.97        ad 			mutex_enter(&uvm_kernel_object->vmobjlock);
    507           1.96        ad 			pg = uvm_pagelookup(uvm_kernel_object,
    508           1.78      yamt 			    va - vm_map_min(kernel_map));
    509           1.97        ad 			mutex_exit(&uvm_kernel_object->vmobjlock);
    510           1.78      yamt 			if (pg) {
    511           1.78      yamt 				panic("uvm_km_check_empty: "
    512           1.78      yamt 				    "has page hashed at %p", (const void *)va);
    513           1.78      yamt 			}
    514           1.78      yamt 		}
    515           1.78      yamt 	}
    516           1.78      yamt }
    517           1.78      yamt #endif /* defined(DEBUG) */
    518            1.1       mrg 
    519            1.1       mrg /*
    520           1.78      yamt  * uvm_km_alloc: allocate an area of kernel memory.
    521            1.1       mrg  *
    522           1.78      yamt  * => NOTE: we can return 0 even if we can wait if there is not enough
    523            1.1       mrg  *	free VM space in the map... caller should be prepared to handle
    524            1.1       mrg  *	this case.
    525            1.1       mrg  * => we return KVA of memory allocated
    526            1.1       mrg  */
    527            1.1       mrg 
    528           1.14       eeh vaddr_t
    529           1.83   thorpej uvm_km_alloc(struct vm_map *map, vsize_t size, vsize_t align, uvm_flag_t flags)
    530            1.1       mrg {
    531           1.14       eeh 	vaddr_t kva, loopva;
    532           1.14       eeh 	vaddr_t offset;
    533           1.44   thorpej 	vsize_t loopsize;
    534            1.8       mrg 	struct vm_page *pg;
    535           1.78      yamt 	struct uvm_object *obj;
    536           1.78      yamt 	int pgaflags;
    537           1.89  drochner 	vm_prot_t prot;
    538           1.78      yamt 	UVMHIST_FUNC(__func__); UVMHIST_CALLED(maphist);
    539            1.1       mrg 
    540           1.40       chs 	KASSERT(vm_map_pmap(map) == pmap_kernel());
    541           1.78      yamt 	KASSERT((flags & UVM_KMF_TYPEMASK) == UVM_KMF_WIRED ||
    542           1.78      yamt 		(flags & UVM_KMF_TYPEMASK) == UVM_KMF_PAGEABLE ||
    543           1.78      yamt 		(flags & UVM_KMF_TYPEMASK) == UVM_KMF_VAONLY);
    544            1.1       mrg 
    545            1.8       mrg 	/*
    546            1.8       mrg 	 * setup for call
    547            1.8       mrg 	 */
    548            1.8       mrg 
    549           1.78      yamt 	kva = vm_map_min(map);	/* hint */
    550            1.8       mrg 	size = round_page(size);
    551           1.95        ad 	obj = (flags & UVM_KMF_PAGEABLE) ? uvm_kernel_object : NULL;
    552           1.78      yamt 	UVMHIST_LOG(maphist,"  (map=0x%x, obj=0x%x, size=0x%x, flags=%d)",
    553           1.78      yamt 		    map, obj, size, flags);
    554            1.1       mrg 
    555            1.8       mrg 	/*
    556            1.8       mrg 	 * allocate some virtual space
    557            1.8       mrg 	 */
    558            1.8       mrg 
    559           1.78      yamt 	if (__predict_false(uvm_map(map, &kva, size, obj, UVM_UNKNOWN_OFFSET,
    560           1.78      yamt 	    align, UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_NONE,
    561           1.78      yamt 	    UVM_ADV_RANDOM,
    562           1.78      yamt 	    (flags & (UVM_KMF_TRYLOCK | UVM_KMF_NOWAIT | UVM_KMF_WAITVA))
    563           1.78      yamt 	    | UVM_FLAG_QUANTUM)) != 0)) {
    564            1.8       mrg 		UVMHIST_LOG(maphist, "<- done (no VM)",0,0,0,0);
    565            1.8       mrg 		return(0);
    566            1.8       mrg 	}
    567            1.8       mrg 
    568            1.8       mrg 	/*
    569            1.8       mrg 	 * if all we wanted was VA, return now
    570            1.8       mrg 	 */
    571            1.8       mrg 
    572           1.78      yamt 	if (flags & (UVM_KMF_VAONLY | UVM_KMF_PAGEABLE)) {
    573            1.8       mrg 		UVMHIST_LOG(maphist,"<- done valloc (kva=0x%x)", kva,0,0,0);
    574            1.8       mrg 		return(kva);
    575            1.8       mrg 	}
    576           1.40       chs 
    577            1.8       mrg 	/*
    578            1.8       mrg 	 * recover object offset from virtual address
    579            1.8       mrg 	 */
    580            1.8       mrg 
    581            1.8       mrg 	offset = kva - vm_map_min(kernel_map);
    582            1.8       mrg 	UVMHIST_LOG(maphist, "  kva=0x%x, offset=0x%x", kva, offset,0,0);
    583            1.8       mrg 
    584            1.8       mrg 	/*
    585            1.8       mrg 	 * now allocate and map in the memory... note that we are the only ones
    586            1.8       mrg 	 * whom should ever get a handle on this area of VM.
    587            1.8       mrg 	 */
    588            1.8       mrg 
    589            1.8       mrg 	loopva = kva;
    590           1.44   thorpej 	loopsize = size;
    591           1.78      yamt 
    592      1.101.4.1       snj 	pgaflags = 0;
    593      1.101.4.1       snj 	if (flags & UVM_KMF_NOWAIT)
    594      1.101.4.1       snj 		pgaflags |= UVM_PGA_USERESERVE;
    595           1.78      yamt 	if (flags & UVM_KMF_ZERO)
    596           1.78      yamt 		pgaflags |= UVM_PGA_ZERO;
    597           1.89  drochner 	prot = VM_PROT_READ | VM_PROT_WRITE;
    598           1.89  drochner 	if (flags & UVM_KMF_EXEC)
    599           1.89  drochner 		prot |= VM_PROT_EXECUTE;
    600           1.44   thorpej 	while (loopsize) {
    601           1.78      yamt 		KASSERT(!pmap_extract(pmap_kernel(), loopva, NULL));
    602           1.78      yamt 
    603           1.78      yamt 		pg = uvm_pagealloc(NULL, offset, NULL, pgaflags);
    604           1.47       chs 
    605            1.8       mrg 		/*
    606            1.8       mrg 		 * out of memory?
    607            1.8       mrg 		 */
    608            1.8       mrg 
    609           1.35   thorpej 		if (__predict_false(pg == NULL)) {
    610           1.58       chs 			if ((flags & UVM_KMF_NOWAIT) ||
    611           1.80      yamt 			    ((flags & UVM_KMF_CANFAIL) && !uvm_reclaimable())) {
    612            1.8       mrg 				/* free everything! */
    613           1.78      yamt 				uvm_km_free(map, kva, size,
    614           1.78      yamt 				    flags & UVM_KMF_TYPEMASK);
    615           1.58       chs 				return (0);
    616            1.8       mrg 			} else {
    617            1.8       mrg 				uvm_wait("km_getwait2");	/* sleep here */
    618            1.8       mrg 				continue;
    619            1.8       mrg 			}
    620            1.8       mrg 		}
    621           1.47       chs 
    622           1.78      yamt 		pg->flags &= ~PG_BUSY;	/* new page */
    623           1.78      yamt 		UVM_PAGE_OWN(pg, NULL);
    624           1.78      yamt 
    625            1.8       mrg 		/*
    626           1.52       chs 		 * map it in
    627            1.8       mrg 		 */
    628           1.40       chs 
    629          1.100      matt 		pmap_kenter_pa(loopva, VM_PAGE_TO_PHYS(pg), prot|PMAP_KMPAGE);
    630            1.8       mrg 		loopva += PAGE_SIZE;
    631            1.8       mrg 		offset += PAGE_SIZE;
    632           1.44   thorpej 		loopsize -= PAGE_SIZE;
    633            1.8       mrg 	}
    634           1.69  junyoung 
    635           1.51     chris        	pmap_update(pmap_kernel());
    636           1.69  junyoung 
    637            1.8       mrg 	UVMHIST_LOG(maphist,"<- done (kva=0x%x)", kva,0,0,0);
    638            1.8       mrg 	return(kva);
    639            1.1       mrg }
    640            1.1       mrg 
    641            1.1       mrg /*
    642            1.1       mrg  * uvm_km_free: free an area of kernel memory
    643            1.1       mrg  */
    644            1.1       mrg 
    645            1.8       mrg void
    646           1.83   thorpej uvm_km_free(struct vm_map *map, vaddr_t addr, vsize_t size, uvm_flag_t flags)
    647            1.8       mrg {
    648            1.1       mrg 
    649           1.78      yamt 	KASSERT((flags & UVM_KMF_TYPEMASK) == UVM_KMF_WIRED ||
    650           1.78      yamt 		(flags & UVM_KMF_TYPEMASK) == UVM_KMF_PAGEABLE ||
    651           1.78      yamt 		(flags & UVM_KMF_TYPEMASK) == UVM_KMF_VAONLY);
    652           1.78      yamt 	KASSERT((addr & PAGE_MASK) == 0);
    653           1.40       chs 	KASSERT(vm_map_pmap(map) == pmap_kernel());
    654            1.1       mrg 
    655            1.8       mrg 	size = round_page(size);
    656            1.1       mrg 
    657           1.78      yamt 	if (flags & UVM_KMF_PAGEABLE) {
    658           1.78      yamt 		uvm_km_pgremove(addr, addr + size);
    659           1.78      yamt 		pmap_remove(pmap_kernel(), addr, addr + size);
    660           1.78      yamt 	} else if (flags & UVM_KMF_WIRED) {
    661      1.101.4.2       snj 		uvm_km_pgremove_intrsafe(map, addr, addr + size);
    662           1.78      yamt 		pmap_kremove(addr, size);
    663            1.8       mrg 	}
    664           1.99      yamt 
    665           1.99      yamt 	/*
    666           1.99      yamt 	 * uvm_unmap_remove calls pmap_update for us.
    667           1.99      yamt 	 */
    668            1.8       mrg 
    669           1.78      yamt 	uvm_unmap1(map, addr, addr + size, UVM_FLAG_QUANTUM|UVM_FLAG_VAONLY);
    670           1.66        pk }
    671           1.66        pk 
    672           1.10   thorpej /* Sanity; must specify both or none. */
    673           1.10   thorpej #if (defined(PMAP_MAP_POOLPAGE) || defined(PMAP_UNMAP_POOLPAGE)) && \
    674           1.10   thorpej     (!defined(PMAP_MAP_POOLPAGE) || !defined(PMAP_UNMAP_POOLPAGE))
    675           1.10   thorpej #error Must specify MAP and UNMAP together.
    676           1.10   thorpej #endif
    677           1.10   thorpej 
    678           1.10   thorpej /*
    679           1.10   thorpej  * uvm_km_alloc_poolpage: allocate a page for the pool allocator
    680           1.10   thorpej  *
    681           1.10   thorpej  * => if the pmap specifies an alternate mapping method, we use it.
    682           1.10   thorpej  */
    683           1.10   thorpej 
    684           1.11   thorpej /* ARGSUSED */
    685           1.14       eeh vaddr_t
    686           1.93   thorpej uvm_km_alloc_poolpage_cache(struct vm_map *map, bool waitok)
    687           1.72      yamt {
    688           1.72      yamt #if defined(PMAP_MAP_POOLPAGE)
    689           1.78      yamt 	return uvm_km_alloc_poolpage(map, waitok);
    690           1.72      yamt #else
    691           1.72      yamt 	struct vm_page *pg;
    692           1.72      yamt 	struct pool *pp = &vm_map_to_kernel(map)->vmk_vacache;
    693           1.72      yamt 	vaddr_t va;
    694           1.72      yamt 
    695           1.72      yamt 	if ((map->flags & VM_MAP_VACACHE) == 0)
    696           1.78      yamt 		return uvm_km_alloc_poolpage(map, waitok);
    697           1.72      yamt 
    698           1.72      yamt 	va = (vaddr_t)pool_get(pp, waitok ? PR_WAITOK : PR_NOWAIT);
    699           1.72      yamt 	if (va == 0)
    700           1.72      yamt 		return 0;
    701           1.72      yamt 	KASSERT(!pmap_extract(pmap_kernel(), va, NULL));
    702           1.72      yamt again:
    703      1.101.4.1       snj 	pg = uvm_pagealloc(NULL, 0, NULL, waitok ? 0 : UVM_PGA_USERESERVE);
    704           1.72      yamt 	if (__predict_false(pg == NULL)) {
    705           1.72      yamt 		if (waitok) {
    706           1.72      yamt 			uvm_wait("plpg");
    707           1.72      yamt 			goto again;
    708           1.72      yamt 		} else {
    709           1.72      yamt 			pool_put(pp, (void *)va);
    710           1.72      yamt 			return 0;
    711           1.72      yamt 		}
    712           1.72      yamt 	}
    713          1.100      matt 	pmap_kenter_pa(va, VM_PAGE_TO_PHYS(pg),
    714          1.100      matt 	    VM_PROT_READ|VM_PROT_WRITE|PMAP_KMPAGE);
    715           1.72      yamt 	pmap_update(pmap_kernel());
    716           1.72      yamt 
    717           1.72      yamt 	return va;
    718           1.72      yamt #endif /* PMAP_MAP_POOLPAGE */
    719           1.72      yamt }
    720           1.72      yamt 
    721           1.72      yamt vaddr_t
    722           1.93   thorpej uvm_km_alloc_poolpage(struct vm_map *map, bool waitok)
    723           1.10   thorpej {
    724           1.10   thorpej #if defined(PMAP_MAP_POOLPAGE)
    725           1.10   thorpej 	struct vm_page *pg;
    726           1.14       eeh 	vaddr_t va;
    727           1.10   thorpej 
    728  1.101.4.2.4.1      matt 
    729           1.15   thorpej  again:
    730  1.101.4.2.4.1      matt #ifdef PMAP_ALLOC_POOLPAGE
    731  1.101.4.2.4.1      matt 	pg = PMAP_ALLOC_POOLPAGE(waitok ? 0 : UVM_PGA_USERESERVE);
    732  1.101.4.2.4.1      matt #else
    733      1.101.4.1       snj 	pg = uvm_pagealloc(NULL, 0, NULL, waitok ? 0 : UVM_PGA_USERESERVE);
    734  1.101.4.2.4.1      matt #endif
    735           1.35   thorpej 	if (__predict_false(pg == NULL)) {
    736           1.15   thorpej 		if (waitok) {
    737           1.15   thorpej 			uvm_wait("plpg");
    738           1.15   thorpej 			goto again;
    739           1.15   thorpej 		} else
    740           1.15   thorpej 			return (0);
    741           1.15   thorpej 	}
    742           1.10   thorpej 	va = PMAP_MAP_POOLPAGE(VM_PAGE_TO_PHYS(pg));
    743           1.35   thorpej 	if (__predict_false(va == 0))
    744           1.10   thorpej 		uvm_pagefree(pg);
    745           1.10   thorpej 	return (va);
    746           1.10   thorpej #else
    747           1.14       eeh 	vaddr_t va;
    748           1.16   thorpej 
    749           1.78      yamt 	va = uvm_km_alloc(map, PAGE_SIZE, 0,
    750           1.78      yamt 	    (waitok ? 0 : UVM_KMF_NOWAIT | UVM_KMF_TRYLOCK) | UVM_KMF_WIRED);
    751           1.10   thorpej 	return (va);
    752           1.10   thorpej #endif /* PMAP_MAP_POOLPAGE */
    753           1.10   thorpej }
    754           1.10   thorpej 
    755           1.10   thorpej /*
    756           1.10   thorpej  * uvm_km_free_poolpage: free a previously allocated pool page
    757           1.10   thorpej  *
    758           1.10   thorpej  * => if the pmap specifies an alternate unmapping method, we use it.
    759           1.10   thorpej  */
    760           1.10   thorpej 
    761           1.11   thorpej /* ARGSUSED */
    762           1.10   thorpej void
    763           1.83   thorpej uvm_km_free_poolpage_cache(struct vm_map *map, vaddr_t addr)
    764           1.72      yamt {
    765           1.72      yamt #if defined(PMAP_UNMAP_POOLPAGE)
    766           1.78      yamt 	uvm_km_free_poolpage(map, addr);
    767           1.72      yamt #else
    768           1.72      yamt 	struct pool *pp;
    769           1.72      yamt 
    770           1.72      yamt 	if ((map->flags & VM_MAP_VACACHE) == 0) {
    771           1.78      yamt 		uvm_km_free_poolpage(map, addr);
    772           1.72      yamt 		return;
    773           1.72      yamt 	}
    774           1.72      yamt 
    775           1.72      yamt 	KASSERT(pmap_extract(pmap_kernel(), addr, NULL));
    776      1.101.4.2       snj 	uvm_km_pgremove_intrsafe(map, addr, addr + PAGE_SIZE);
    777           1.72      yamt 	pmap_kremove(addr, PAGE_SIZE);
    778           1.72      yamt #if defined(DEBUG)
    779           1.72      yamt 	pmap_update(pmap_kernel());
    780           1.72      yamt #endif
    781           1.72      yamt 	KASSERT(!pmap_extract(pmap_kernel(), addr, NULL));
    782           1.72      yamt 	pp = &vm_map_to_kernel(map)->vmk_vacache;
    783           1.72      yamt 	pool_put(pp, (void *)addr);
    784           1.72      yamt #endif
    785           1.72      yamt }
    786           1.72      yamt 
    787           1.72      yamt /* ARGSUSED */
    788           1.72      yamt void
    789           1.83   thorpej uvm_km_free_poolpage(struct vm_map *map, vaddr_t addr)
    790           1.10   thorpej {
    791           1.10   thorpej #if defined(PMAP_UNMAP_POOLPAGE)
    792           1.14       eeh 	paddr_t pa;
    793           1.10   thorpej 
    794           1.10   thorpej 	pa = PMAP_UNMAP_POOLPAGE(addr);
    795           1.10   thorpej 	uvm_pagefree(PHYS_TO_VM_PAGE(pa));
    796           1.10   thorpej #else
    797           1.78      yamt 	uvm_km_free(map, addr, PAGE_SIZE, UVM_KMF_WIRED);
    798           1.10   thorpej #endif /* PMAP_UNMAP_POOLPAGE */
    799            1.1       mrg }
    800