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/param.h>
28 #include <sys/systm.h>
29 #include <sys/malloc.h>
30 #include <sys/sysctl.h>
31 #include <vm/vm.h>
32 #include <vm/vm_param.h>
33 #include <vm/pmap.h>
34 #include <vm/vm_page.h>
35 #include <vm/vm_phys.h>
36 #include <vm/vm_dumpset.h>
37 #include <vm/uma.h>
38 #include <vm/uma_int.h>
39 #include <machine/md_var.h>
40
41 static int hw_uma_mdpages;
42 SYSCTL_INT(_hw, OID_AUTO, uma_mdpages, CTLFLAG_RD, &hw_uma_mdpages, 0,
43 "UMA MD pages in use");
44
45 void *
uma_small_alloc(uma_zone_t zone,vm_size_t bytes,int domain,u_int8_t * flags,int wait)46 uma_small_alloc(uma_zone_t zone, vm_size_t bytes, int domain, u_int8_t *flags,
47 int wait)
48 {
49 void *va;
50 vm_paddr_t pa;
51 vm_page_t m;
52
53 *flags = UMA_SLAB_PRIV;
54
55 m = vm_page_alloc_noobj_domain(domain, malloc2vm_flags(wait) |
56 VM_ALLOC_WIRED);
57 if (m == NULL)
58 return (NULL);
59
60 pa = VM_PAGE_TO_PHYS(m);
61 #ifdef __powerpc64__
62 if ((wait & M_NODUMP) == 0)
63 dump_add_page(pa);
64 #endif
65
66 if (!hw_direct_map) {
67 pmap_kenter(pa, pa);
68 va = (void *)(vm_offset_t)pa;
69 } else {
70 va = (void *)(vm_offset_t)PHYS_TO_DMAP(pa);
71 }
72 atomic_add_int(&hw_uma_mdpages, 1);
73
74 return (va);
75 }
76
77 void
uma_small_free(void * mem,vm_size_t size,u_int8_t flags)78 uma_small_free(void *mem, vm_size_t size, u_int8_t flags)
79 {
80 vm_page_t m;
81
82 if (hw_direct_map)
83 m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t)mem));
84 else {
85 m = PHYS_TO_VM_PAGE(pmap_kextract((vm_offset_t)mem));
86 pmap_kremove((vm_offset_t)mem);
87 }
88
89 KASSERT(m != NULL,
90 ("Freeing UMA block at %p with no associated page", mem));
91 #ifdef __powerpc64__
92 dump_drop_page(VM_PAGE_TO_PHYS(m));
93 #endif
94 vm_page_unwire_noq(m);
95 vm_page_free(m);
96 atomic_subtract_int(&hw_uma_mdpages, 1);
97 }
98