1 /*-
2 * Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu>
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 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/5.4/sys/amd64/amd64/uma_machdep.c 145335 2005-04-20 19:11:07Z cvs2svn $");
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/md_var.h>
40 #include <machine/vmparam.h>
41
42 void *
43 uma_small_alloc(uma_zone_t zone, int bytes, u_int8_t *flags, int wait)
44 {
45 static vm_pindex_t colour;
46 vm_page_t m;
47 void *va;
48 int pflags;
49
50 *flags = UMA_SLAB_PRIV;
51 if ((wait & (M_NOWAIT|M_USE_RESERVE)) == M_NOWAIT)
52 pflags = VM_ALLOC_INTERRUPT;
53 else
54 pflags = VM_ALLOC_SYSTEM;
55 if (wait & M_ZERO)
56 pflags |= VM_ALLOC_ZERO;
57 for (;;) {
58 m = vm_page_alloc(NULL, colour++, pflags | VM_ALLOC_NOOBJ);
59 if (m == NULL) {
60 if (wait & M_NOWAIT)
61 return (NULL);
62 else
63 VM_WAIT;
64 } else
65 break;
66 }
67 va = (void *)PHYS_TO_DMAP(m->phys_addr);
68 if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0)
69 pagezero(va);
70 return (va);
71 }
72
73 void
74 uma_small_free(void *mem, int size, u_int8_t flags)
75 {
76 vm_page_t m;
77
78 m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t)mem));
79 vm_page_lock_queues();
80 vm_page_free(m);
81 vm_page_unlock_queues();
82 }
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