memutil.c (a20ad05beb32b120fab7f8cfaee81601d7851d92) memutil.c (2fea6431120dc19a04430c68b2484524074b2e43)
1/*-
2 * Copyright (c) 2004 Mark R V Murray
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

--- 14 unchanged lines hidden (view full) ---

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/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/param.h>
1/*-
2 * Copyright (c) 2004 Mark R V Murray
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

--- 14 unchanged lines hidden (view full) ---

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/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/param.h>
31#include <sys/kernel.h>
32#include <sys/lock.h>
31#include <sys/malloc.h>
32#include <sys/memrange.h>
33#include <sys/malloc.h>
34#include <sys/memrange.h>
35#include <sys/rwlock.h>
33#include <sys/systm.h>
34
36#include <sys/systm.h>
37
38static struct rwlock mr_lock;
39
35/*
36 * Implementation-neutral, kernel-callable functions for manipulating
37 * memory range attributes.
38 */
40/*
41 * Implementation-neutral, kernel-callable functions for manipulating
42 * memory range attributes.
43 */
44void
45mem_range_init(void)
46{
47
48 if (mem_range_softc.mr_op == NULL)
49 return;
50 rw_init(&mr_lock, "memrange");
51 mem_range_softc.mr_op->init(&mem_range_softc);
52}
53
54void
55mem_range_destroy(void)
56{
57
58 if (mem_range_softc.mr_op == NULL)
59 return;
60 rw_destroy(&mr_lock);
61}
62
39int
40mem_range_attr_get(struct mem_range_desc *mrd, int *arg)
41{
63int
64mem_range_attr_get(struct mem_range_desc *mrd, int *arg)
65{
42 /* can we handle this? */
66 int nd;
67
43 if (mem_range_softc.mr_op == NULL)
44 return (EOPNOTSUPP);
68 if (mem_range_softc.mr_op == NULL)
69 return (EOPNOTSUPP);
45
46 if (*arg == 0)
70 nd = *arg;
71 rw_rlock(&mr_lock);
72 if (nd == 0)
47 *arg = mem_range_softc.mr_ndesc;
48 else
73 *arg = mem_range_softc.mr_ndesc;
74 else
49 bcopy(mem_range_softc.mr_desc, mrd,
50 (*arg) * sizeof(struct mem_range_desc));
75 bcopy(mem_range_softc.mr_desc, mrd, nd * sizeof(*mrd));
76 rw_runlock(&mr_lock);
51 return (0);
52}
53
54int
55mem_range_attr_set(struct mem_range_desc *mrd, int *arg)
56{
77 return (0);
78}
79
80int
81mem_range_attr_set(struct mem_range_desc *mrd, int *arg)
82{
57 /* can we handle this? */
83 int ret;
84
58 if (mem_range_softc.mr_op == NULL)
59 return (EOPNOTSUPP);
85 if (mem_range_softc.mr_op == NULL)
86 return (EOPNOTSUPP);
60
61 return (mem_range_softc.mr_op->set(&mem_range_softc, mrd, arg));
87 rw_wlock(&mr_lock);
88 ret = mem_range_softc.mr_op->set(&mem_range_softc, mrd, arg);
89 rw_wunlock(&mr_lock);
90 return (ret);
62}
91}