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
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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,
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29 * $FreeBSD: src/sys/sys/rman.h,v 1.5.2.1 2001/06/05 08:06:07 imp Exp $
30 * $DragonFly: src/sys/sys/rman.h,v 1.4 2003/07/19 21:14:50 dillon Exp $
34 #define _SYS_RMAN_H_ 1
37 #include <sys/queue.h>
41 * We use a linked list rather than a bitmap because we need to be able to
42 * represent potentially huge objects (like all of a processor's physical
43 * address space). That is also why the indices are defined to have type
44 * `unsigned long' -- that being the largest integral type in Standard C.
46 CIRCLEQ_HEAD(resource_head, resource);
48 CIRCLEQ_ENTRY(resource) r_link;
49 LIST_ENTRY(resource) r_sharelink;
50 LIST_HEAD(, resource) *r_sharehead;
51 u_long r_start; /* index of the first entry in this resource */
52 u_long r_end; /* index of the last entry (inclusive) */
54 void *r_virtual; /* virtual address of this resource */
55 bus_space_tag_t r_bustag; /* bus_space tag */
56 bus_space_handle_t r_bushandle; /* bus_space handle */
57 struct device *r_dev; /* device which has allocated this resource */
58 struct rman *r_rm; /* resource manager from whence this came */
61 #define RF_ALLOCATED 0x0001 /* resource has been reserved */
62 #define RF_ACTIVE 0x0002 /* resource allocation has been activated */
63 #define RF_SHAREABLE 0x0004 /* resource permits contemporaneous sharing */
64 #define RF_TIMESHARE 0x0008 /* resource permits time-division sharing */
65 #define RF_WANTED 0x0010 /* somebody is waiting for this resource */
66 #define RF_FIRSTSHARE 0x0020 /* first in sharing list */
68 #define RF_ALIGNMENT_SHIFT 10 /* alignment size bit starts bit 10 */
69 #define RF_ALIGNMENT_MASK (0x003F << RF_ALIGNMENT_SHIFT)
70 /* resource address alignemnt size bit mask */
71 #define RF_ALIGNMENT_LOG2(x) ((x) << RF_ALIGNMENT_SHIFT)
72 #define RF_ALIGNMENT(x) (((x) & RF_ALIGNMENT_MASK) >> RF_ALIGNMENT_SHIFT)
74 enum rman_type { RMAN_UNINIT = 0, RMAN_GAUGE, RMAN_ARRAY };
77 struct resource_head rm_list;
78 struct lwkt_token *rm_slock; /* mutex used to protect rm_list */
79 TAILQ_ENTRY(rman) rm_link; /* link in list of all rmans */
80 u_long rm_start; /* index of globally first entry */
81 u_long rm_end; /* index of globally last entry */
82 enum rman_type rm_type; /* what type of resource this is */
83 const char *rm_descr; /* text descripion of this resource */
85 TAILQ_HEAD(rman_head, rman);
89 int rman_activate_resource(struct resource *r);
90 int rman_await_resource(struct resource *r, int slpflags, int timo);
91 int rman_deactivate_resource(struct resource *r);
92 int rman_fini(struct rman *rm);
93 int rman_init(struct rman *rm);
94 int rman_manage_region(struct rman *rm, u_long start, u_long end);
95 int rman_release_resource(struct resource *r);
96 struct resource *rman_reserve_resource(struct rman *rm, u_long start,
97 u_long end, u_long count,
98 u_int flags, struct device *dev);
99 uint32_t rman_make_alignment_flags(uint32_t size);
101 #define rman_get_start(r) ((r)->r_start)
102 #define rman_get_end(r) ((r)->r_end)
103 #define rman_get_flags(r) ((r)->r_flags)
104 #define rman_set_virtual(r,v) ((r)->r_virtual = (v))
105 #define rman_get_virtual(r) ((r)->r_virtual)
106 #define rman_set_bustag(r,t) ((r)->r_bustag = (t))
107 #define rman_get_bustag(r) ((r)->r_bustag)
108 #define rman_set_bushandle(r,h) ((r)->r_bushandle = (h))
109 #define rman_get_bushandle(r) ((r)->r_bushandle)
111 extern struct rman_head rman_head;
114 #endif /* !_SYS_RMAN_H_ */