uma_machdep.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: stable/11/sys/mips/mips/uma_machdep.c 330897 2018-03-14 03:19:51Z eadler $");
31
32#include <sys/param.h>
33#include <sys/lock.h>
34#include <sys/malloc.h>
35#include <sys/mutex.h>
36#include <sys/systm.h>
37#include <vm/vm.h>
38#include <vm/vm_page.h>
39#include <vm/vm_pageout.h>
40#include <vm/uma.h>
41#include <vm/uma_int.h>
42#include <machine/md_var.h>
43#include <machine/vmparam.h>
44
45void *
46uma_small_alloc(uma_zone_t zone, vm_size_t bytes, u_int8_t *flags, int wait)
47{
48	vm_paddr_t pa;
49	vm_page_t m;
50	int pflags;
51	void *va;
52
53	*flags = UMA_SLAB_PRIV;
54	pflags = malloc2vm_flags(wait) | VM_ALLOC_WIRED;
55#ifndef __mips_n64
56	pflags &= ~(VM_ALLOC_WAITOK | VM_ALLOC_WAITFAIL);
57	pflags |= VM_ALLOC_NOWAIT;
58#endif
59
60	for (;;) {
61		m = vm_page_alloc_freelist(VM_FREELIST_DIRECT, pflags);
62#ifndef __mips_n64
63		if (m == NULL && vm_page_reclaim_contig(pflags, 1,
64		    0, MIPS_KSEG0_LARGEST_PHYS, PAGE_SIZE, 0))
65			continue;
66#endif
67		if (m == NULL) {
68			if (wait & M_NOWAIT)
69				return (NULL);
70			else
71				VM_WAIT;
72		} else
73			break;
74	}
75
76	pa = VM_PAGE_TO_PHYS(m);
77	va = (void *)MIPS_PHYS_TO_DIRECT(pa);
78	if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0)
79		bzero(va, PAGE_SIZE);
80	return (va);
81}
82
83void
84uma_small_free(void *mem, vm_size_t size, u_int8_t flags)
85{
86	vm_page_t m;
87	vm_paddr_t pa;
88
89	pa = MIPS_DIRECT_TO_PHYS((vm_offset_t)mem);
90	m = PHYS_TO_VM_PAGE(pa);
91	m->wire_count--;
92	vm_page_free(m);
93	atomic_subtract_int(&vm_cnt.v_wire_count, 1);
94}
95