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
41static int hw_uma_mdpages;
42SYSCTL_INT(_hw, OID_AUTO, uma_mdpages, CTLFLAG_RD, &hw_uma_mdpages, 0,
43	   "UMA MD pages in use");
44
45void *
46uma_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
77void
78uma_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