uma_machdep.c revision 295451 
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: head/sys/arm64/arm64/uma_machdep.c 295451 2016-02-09 20:22:35Z glebius $");
29
30#include <sys/param.h>
31#include <sys/lock.h>
32#include <sys/malloc.h>
33#include <sys/mutex.h>
34#include <sys/systm.h>
35#include <vm/vm.h>
36#include <vm/vm_page.h>
37#include <vm/vm_pageout.h>
38#include <vm/uma.h>
39#include <vm/uma_int.h>
40#include <machine/md_var.h>
41#include <machine/vmparam.h>
42
43void *
44uma_small_alloc(uma_zone_t zone, vm_size_t bytes, u_int8_t *flags, int wait)
45{
46	vm_page_t m;
47	vm_paddr_t pa;
48	void *va;
49	int pflags;
50
51	*flags = UMA_SLAB_PRIV;
52	pflags = malloc2vm_flags(wait) | VM_ALLOC_NOOBJ | VM_ALLOC_WIRED;
53	for (;;) {
54		m = vm_page_alloc(NULL, 0, pflags);
55		if (m == NULL) {
56			if (wait & M_NOWAIT)
57				return (NULL);
58			else
59				VM_WAIT;
60		} else
61			break;
62	}
63	pa = m->phys_addr;
64	if ((wait & M_NODUMP) == 0)
65		dump_add_page(pa);
66	va = (void *)PHYS_TO_DMAP(pa);
67	if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0)
68		bzero(va, PAGE_SIZE);
69	return (va);
70}
71
72void
73uma_small_free(void *mem, vm_size_t size, u_int8_t flags)
74{
75	vm_page_t m;
76	vm_paddr_t pa;
77
78	pa = DMAP_TO_PHYS((vm_offset_t)mem);
79	dump_drop_page(pa);
80	m = PHYS_TO_VM_PAGE(pa);
81	m->wire_count--;
82	vm_page_free(m);
83	atomic_subtract_int(&vm_cnt.v_wire_count, 1);
84}
85