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device_pager.c (79224) device_pager.c (92654)
1/*
2 * Copyright (c) 1990 University of Utah.
3 * Copyright (c) 1991, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * the Systems Programming Group of the University of Utah Computer
8 * Science Department.

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31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)device_pager.c 8.1 (Berkeley) 6/11/93
1/*
2 * Copyright (c) 1990 University of Utah.
3 * Copyright (c) 1991, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * the Systems Programming Group of the University of Utah Computer
8 * Science Department.

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31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)device_pager.c 8.1 (Berkeley) 6/11/93
39 * $FreeBSD: head/sys/vm/device_pager.c 79224 2001-07-04 16:20:28Z dillon $
39 * $FreeBSD: head/sys/vm/device_pager.c 92654 2002-03-19 09:11:49Z jeff $
40 */
41
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/conf.h>
45#include <sys/lock.h>
46#include <sys/proc.h>
47#include <sys/mutex.h>

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68static struct pagerlst dev_pager_object_list;
69/* protect against object creation */
70static struct sx dev_pager_sx;
71/* protect list manipulation */
72static struct mtx dev_pager_mtx;
73
74
75static vm_zone_t fakepg_zone;
40 */
41
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/conf.h>
45#include <sys/lock.h>
46#include <sys/proc.h>
47#include <sys/mutex.h>

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68static struct pagerlst dev_pager_object_list;
69/* protect against object creation */
70static struct sx dev_pager_sx;
71/* protect list manipulation */
72static struct mtx dev_pager_mtx;
73
74
75static vm_zone_t fakepg_zone;
76#if 0
76static struct vm_zone fakepg_zone_store;
77static struct vm_zone fakepg_zone_store;
78#endif
77
78static vm_page_t dev_pager_getfake __P((vm_offset_t));
79static void dev_pager_putfake __P((vm_page_t));
80
81struct pagerops devicepagerops = {
82 dev_pager_init,
83 dev_pager_alloc,
84 dev_pager_dealloc,

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89};
90
91static void
92dev_pager_init()
93{
94 TAILQ_INIT(&dev_pager_object_list);
95 sx_init(&dev_pager_sx, "dev_pager create");
96 mtx_init(&dev_pager_mtx, "dev_pager list", MTX_DEF);
79
80static vm_page_t dev_pager_getfake __P((vm_offset_t));
81static void dev_pager_putfake __P((vm_page_t));
82
83struct pagerops devicepagerops = {
84 dev_pager_init,
85 dev_pager_alloc,
86 dev_pager_dealloc,

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91};
92
93static void
94dev_pager_init()
95{
96 TAILQ_INIT(&dev_pager_object_list);
97 sx_init(&dev_pager_sx, "dev_pager create");
98 mtx_init(&dev_pager_mtx, "dev_pager list", MTX_DEF);
99#if 0
97 fakepg_zone = &fakepg_zone_store;
98 zinitna(fakepg_zone, NULL, "DP fakepg", sizeof(struct vm_page), 0, 0, 2);
100 fakepg_zone = &fakepg_zone_store;
101 zinitna(fakepg_zone, NULL, "DP fakepg", sizeof(struct vm_page), 0, 0, 2);
102#endif
103 fakepg_zone = zinit("DP fakepg", sizeof(struct vm_page), 0, 0, 0);
99}
100
101static vm_object_t
102dev_pager_alloc(void *handle, vm_ooffset_t size, vm_prot_t prot, vm_ooffset_t foff)
103{
104 dev_t dev;
105 d_mmap_t *mapfunc;
106 vm_object_t object;

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105
106static vm_object_t
107dev_pager_alloc(void *handle, vm_ooffset_t size, vm_prot_t prot, vm_ooffset_t foff)
108{
109 dev_t dev;
110 d_mmap_t *mapfunc;
111 vm_object_t object;

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