1121081Salc/*-
2121081Salc * Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu>
3121081Salc * All rights reserved.
4121081Salc *
5121081Salc * Redistribution and use in source and binary forms, with or without
6121081Salc * modification, are permitted provided that the following conditions
7121081Salc * are met:
8121081Salc * 1. Redistributions of source code must retain the above copyright
9121081Salc *    notice, this list of conditions and the following disclaimer.
10121081Salc * 2. Redistributions in binary form must reproduce the above copyright
11121081Salc *    notice, this list of conditions and the following disclaimer in the
12121081Salc *    documentation and/or other materials provided with the distribution.
13121081Salc *
14121081Salc * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15121081Salc * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16121081Salc * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17121081Salc * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18121081Salc * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19121081Salc * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20121081Salc * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21121081Salc * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22121081Salc * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23121081Salc * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24121081Salc * SUCH DAMAGE.
25121081Salc */
26121081Salc
27121081Salc#include <sys/cdefs.h>
28121081Salc__FBSDID("$FreeBSD$");
29121081Salc
30121081Salc#include <sys/param.h>
31121081Salc#include <sys/lock.h>
32243040Skib#include <sys/malloc.h>
33121081Salc#include <sys/mutex.h>
34121081Salc#include <sys/systm.h>
35121081Salc#include <vm/vm.h>
36121081Salc#include <vm/vm_page.h>
37121081Salc#include <vm/vm_pageout.h>
38121081Salc#include <vm/uma.h>
39121081Salc#include <vm/uma_int.h>
40121081Salc#include <machine/md_var.h>
41121081Salc#include <machine/vmparam.h>
42121081Salc
43121081Salcvoid *
44121081Salcuma_small_alloc(uma_zone_t zone, int bytes, u_int8_t *flags, int wait)
45121081Salc{
46121081Salc	vm_page_t m;
47157908Speter	vm_paddr_t pa;
48121081Salc	void *va;
49121081Salc	int pflags;
50121081Salc
51121081Salc	*flags = UMA_SLAB_PRIV;
52243040Skib	pflags = malloc2vm_flags(wait) | VM_ALLOC_NOOBJ | VM_ALLOC_WIRED;
53121081Salc	for (;;) {
54226843Salc		m = vm_page_alloc(NULL, 0, pflags);
55121081Salc		if (m == NULL) {
56121081Salc			if (wait & M_NOWAIT)
57121081Salc				return (NULL);
58121081Salc			else
59121081Salc				VM_WAIT;
60121081Salc		} else
61121081Salc			break;
62121081Salc	}
63157908Speter	pa = m->phys_addr;
64230623Skmacy	if ((wait & M_NODUMP) == 0)
65230623Skmacy		dump_add_page(pa);
66157908Speter	va = (void *)PHYS_TO_DMAP(pa);
67121081Salc	if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0)
68121081Salc		pagezero(va);
69121081Salc	return (va);
70121081Salc}
71121081Salc
72121081Salcvoid
73121081Salcuma_small_free(void *mem, int size, u_int8_t flags)
74121081Salc{
75121081Salc	vm_page_t m;
76157908Speter	vm_paddr_t pa;
77121081Salc
78157908Speter	pa = DMAP_TO_PHYS((vm_offset_t)mem);
79157908Speter	dump_drop_page(pa);
80157908Speter	m = PHYS_TO_VM_PAGE(pa);
81172189Salc	m->wire_count--;
82121081Salc	vm_page_free(m);
83172189Salc	atomic_subtract_int(&cnt.v_wire_count, 1);
84121081Salc}
85