uma_machdep.c revision 125184 
1/*
2 * Copyright (c) 2003 The FreeBSD Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/powerpc/aim/uma_machdep.c 125184 2004-01-29 00:32:22Z grehan $");
29
30#include <sys/param.h>
31#include <sys/lock.h>
32#include <sys/mutex.h>
33#include <sys/systm.h>
34#include <vm/vm.h>
35#include <vm/vm_page.h>
36#include <vm/vm_pageout.h>
37#include <vm/uma.h>
38#include <vm/uma_int.h>
39#include <machine/vmparam.h>
40
41void *
42uma_small_alloc(uma_zone_t zone, int bytes, u_int8_t *flags, int wait)
43{
44	static vm_pindex_t color;
45	void *va;
46	vm_page_t m;
47	int pflags;
48
49	*flags = UMA_SLAB_PRIV;
50	if ((wait & (M_NOWAIT|M_USE_RESERVE)) == M_NOWAIT)
51		pflags = VM_ALLOC_INTERRUPT;
52	else
53		pflags = VM_ALLOC_SYSTEM;
54	if (wait & M_ZERO)
55		pflags |= VM_ALLOC_ZERO;
56
57	for (;;) {
58		m = vm_page_alloc(NULL, color++, pflags | VM_ALLOC_NOOBJ);
59		if (m == NULL) {
60			if (wait & M_NOWAIT)
61				return (NULL);
62			VM_WAIT;
63		} else
64			break;
65	}
66
67	va = (void *) VM_PAGE_TO_PHYS(m);
68	if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0)
69		bzero(va, PAGE_SIZE);
70	return (va);
71}
72
73void
74uma_small_free(void *mem, int size, u_int8_t flags)
75{
76	vm_page_t m;
77
78	m = PHYS_TO_VM_PAGE((u_int32_t)mem);
79	vm_page_lock_queues();
80	vm_page_free(m);
81	vm_page_unlock_queues();
82}
83