2 * Copyright 1998 Massachusetts Institute of Technology
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission. M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose. It is provided "as is" without express or implied
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #define _SYS_RMAN_H_ 1
36 #include <sys/queue.h>
39 #define RF_ALLOCATED 0x0001 /* resource has been reserved */
40 #define RF_ACTIVE 0x0002 /* resource allocation has been activated */
41 #define RF_SHAREABLE 0x0004 /* resource permits contemporaneous sharing */
42 #define RF_TIMESHARE 0x0008 /* resource permits time-division sharing */
43 #define RF_WANTED 0x0010 /* somebody is waiting for this resource */
44 #define RF_FIRSTSHARE 0x0020 /* first in sharing list */
46 #define RF_ALIGNMENT_SHIFT 10 /* alignment size bit starts bit 10 */
47 #define RF_ALIGNMENT_MASK (0x003F << RF_ALIGNMENT_SHIFT)
48 /* resource address alignemnt size bit mask */
49 #define RF_ALIGNMENT_LOG2(x) ((x) << RF_ALIGNMENT_SHIFT)
50 #define RF_ALIGNMENT(x) (((x) & RF_ALIGNMENT_MASK) >> RF_ALIGNMENT_SHIFT)
52 enum rman_type { RMAN_UNINIT = 0, RMAN_GAUGE, RMAN_ARRAY };
55 * String length exported to userspace for resource names, etc.
60 * Userspace-exported structures.
63 uintptr_t r_handle; /* resource uniquifier */
64 uintptr_t r_parent; /* parent rman */
65 uintptr_t r_device; /* device owning this resource */
66 char r_devname[RM_TEXTLEN]; /* device name XXX obsolete */
68 u_long r_start; /* offset in resource space */
69 u_long r_size; /* size in resource space */
70 u_int r_flags; /* RF_* flags */
74 uintptr_t rm_handle; /* rman uniquifier */
75 char rm_descr[RM_TEXTLEN]; /* rman description */
77 u_long rm_start; /* base of managed region */
78 u_long rm_size; /* size of managed region */
79 enum rman_type rm_type; /* region type */
84 * We use a linked list rather than a bitmap because we need to be able to
85 * represent potentially huge objects (like all of a processor's physical
86 * address space). That is also why the indices are defined to have type
87 * `unsigned long' -- that being the largest integral type in ISO C (1990).
88 * The 1999 version of C allows `long long'; we may need to switch to that
89 * at some point in the future, particularly if we want to support 36-bit
90 * addresses on IA32 hardware.
92 TAILQ_HEAD(resource_head, resource);
94 TAILQ_ENTRY(resource) r_link;
95 LIST_ENTRY(resource) r_sharelink;
96 LIST_HEAD(, resource) *r_sharehead;
97 u_long r_start; /* index of the first entry in this resource */
98 u_long r_end; /* index of the last entry (inclusive) */
100 void *r_virtual; /* virtual address of this resource */
101 bus_space_tag_t r_bustag; /* bus_space tag */
102 bus_space_handle_t r_bushandle; /* bus_space handle */
103 struct device *r_dev; /* device which has allocated this resource */
104 struct rman *r_rm; /* resource manager from whence this came */
108 struct resource_head rm_list;
109 struct simplelock *rm_slock; /* mutex used to protect rm_list */
110 TAILQ_ENTRY(rman) rm_link; /* link in list of all rmans */
111 u_long rm_start; /* index of globally first entry */
112 u_long rm_end; /* index of globally last entry */
113 enum rman_type rm_type; /* what type of resource this is */
114 const char *rm_descr; /* text descripion of this resource */
116 TAILQ_HEAD(rman_head, rman);
118 int rman_activate_resource(struct resource *r);
119 int rman_await_resource(struct resource *r, int pri, int timo);
120 int rman_deactivate_resource(struct resource *r);
121 int rman_fini(struct rman *rm);
122 int rman_init(struct rman *rm);
123 int rman_manage_region(struct rman *rm, u_long start, u_long end);
124 int rman_release_resource(struct resource *r);
125 struct resource *rman_reserve_resource(struct rman *rm, u_long start,
126 u_long end, u_long count,
127 u_int flags, struct device *dev);
128 uint32_t rman_make_alignment_flags(uint32_t size);
130 #define rman_get_start(r) ((r)->r_start)
131 #define rman_get_end(r) ((r)->r_end)
132 #define rman_get_size(r) (((r)->r_end - (r)->r_start) + 1)
133 #define rman_get_flags(r) ((r)->r_flags)
134 #define rman_set_virtual(r,v) ((r)->r_virtual = (v))
135 #define rman_get_virtual(r) ((r)->r_virtual)
136 #define rman_set_bustag(r,t) ((r)->r_bustag = (t))
137 #define rman_get_bustag(r) ((r)->r_bustag)
138 #define rman_set_bushandle(r,h) ((r)->r_bushandle = (h))
139 #define rman_get_bushandle(r) ((r)->r_bushandle)
141 extern struct rman_head rman_head;
144 #endif /* !_SYS_RMAN_H_ */