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: releng/7.4/sys/powerpc/powerpc/uma_machdep.c 172189 2007-09-15 18:47:02Z alc $");
29
30 #include <sys/param.h>
31 #include <sys/kernel.h>
32 #include <sys/lock.h>
33 #include <sys/mutex.h>
34 #include <sys/systm.h>
35 #include <sys/sysctl.h>
36 #include <vm/vm.h>
37 #include <vm/vm_page.h>
38 #include <vm/vm_pageout.h>
39 #include <vm/uma.h>
40 #include <vm/uma_int.h>
41 #include <machine/vmparam.h>
42
43 static int hw_uma_mdpages;
44 SYSCTL_INT(_hw, OID_AUTO, uma_mdpages, CTLFLAG_RD, &hw_uma_mdpages, 0,
45 "UMA MD pages in use");
46
47 void *
48 uma_small_alloc(uma_zone_t zone, int bytes, u_int8_t *flags, int wait)
49 {
50 static vm_pindex_t color;
51 void *va;
52 vm_page_t m;
53 int pflags;
54
55 *flags = UMA_SLAB_PRIV;
56 if ((wait & (M_NOWAIT|M_USE_RESERVE)) == M_NOWAIT)
57 pflags = VM_ALLOC_INTERRUPT | VM_ALLOC_WIRED;
58 else
59 pflags = VM_ALLOC_SYSTEM | VM_ALLOC_WIRED;
60 if (wait & M_ZERO)
61 pflags |= VM_ALLOC_ZERO;
62
63 for (;;) {
64 m = vm_page_alloc(NULL, color++, pflags | VM_ALLOC_NOOBJ);
65 if (m == NULL) {
66 if (wait & M_NOWAIT)
67 return (NULL);
68 VM_WAIT;
69 } else
70 break;
71 }
72
73 va = (void *) VM_PAGE_TO_PHYS(m);
74 if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0)
75 bzero(va, PAGE_SIZE);
76 atomic_add_int(&hw_uma_mdpages, 1);
77
78 return (va);
79 }
80
81 void
82 uma_small_free(void *mem, int size, u_int8_t flags)
83 {
84 vm_page_t m;
85
86 m = PHYS_TO_VM_PAGE((u_int32_t)mem);
87 m->wire_count--;
88 vm_page_free(m);
89 atomic_subtract_int(&cnt.v_wire_count, 1);
90 atomic_subtract_int(&hw_uma_mdpages, 1);
91 }
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