uma_machdep.c revision 263620 
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/mips/mips/uma_machdep.c 263620 2014-03-22 10:26:09Z bdrewery $");
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, int bytes, u_int8_t *flags, int wait)
45{
46	vm_paddr_t pa;
47	vm_page_t m;
48	int pflags;
49	void *va;
50
51	*flags = UMA_SLAB_PRIV;
52	pflags = malloc2vm_flags(wait) | VM_ALLOC_WIRED;
53
54	for (;;) {
55		m = vm_page_alloc_freelist(VM_FREELIST_DIRECT, pflags);
56		if (m == NULL) {
57			if (wait & M_NOWAIT)
58				return (NULL);
59			else
60				pmap_grow_direct_page_cache();
61		} else
62			break;
63	}
64
65	pa = VM_PAGE_TO_PHYS(m);
66	va = (void *)MIPS_PHYS_TO_DIRECT(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, int size, u_int8_t flags)
74{
75	vm_page_t m;
76	vm_paddr_t pa;
77
78	pa = MIPS_DIRECT_TO_PHYS((vm_offset_t)mem);
79	m = PHYS_TO_VM_PAGE(pa);
80	m->wire_count--;
81	vm_page_free(m);
82	atomic_subtract_int(&vm_cnt.v_wire_count, 1);
83}
84