2 * Copyright 1998 Massachusetts Institute of Technology
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33 #define _SYS_RMAN_H_ 1
36 #include <sys/queue.h>
40 * We use a linked list rather than a bitmap because we need to be able to
41 * represent potentially huge objects (like all of a processor's physical
42 * address space). That is also why the indices are defined to have type
43 * `unsigned long' -- that being the largest integral type in Standard C.
45 CIRCLEQ_HEAD(resource_head, resource);
47 CIRCLEQ_ENTRY(resource) r_link;
48 LIST_ENTRY(resource) r_sharelink;
49 LIST_HEAD(, resource) *r_sharehead;
50 u_long r_start; /* index of the first entry in this resource */
51 u_long r_end; /* index of the last entry (inclusive) */
53 void *r_virtual; /* virtual address of this resource */
54 bus_space_tag_t r_bustag; /* bus_space tag */
55 bus_space_handle_t r_bushandle; /* bus_space handle */
56 struct device *r_dev; /* device which has allocated this resource */
57 struct rman *r_rm; /* resource manager from whence this came */
60 #define RF_ALLOCATED 0x0001 /* resource has been reserved */
61 #define RF_ACTIVE 0x0002 /* resource allocation has been activated */
62 #define RF_SHAREABLE 0x0004 /* resource permits contemporaneous sharing */
63 #define RF_TIMESHARE 0x0008 /* resource permits time-division sharing */
64 #define RF_WANTED 0x0010 /* somebody is waiting for this resource */
65 #define RF_FIRSTSHARE 0x0020 /* first in sharing list */
67 enum rman_type { RMAN_UNINIT = 0, RMAN_GAUGE, RMAN_ARRAY };
70 struct resource_head rm_list;
71 struct simplelock *rm_slock; /* mutex used to protect rm_list */
72 TAILQ_ENTRY(rman) rm_link; /* link in list of all rmans */
73 u_long rm_start; /* index of globally first entry */
74 u_long rm_end; /* index of globally last entry */
75 enum rman_type rm_type; /* what type of resource this is */
76 const char *rm_descr; /* text descripion of this resource */
78 TAILQ_HEAD(rman_head, rman);
82 int rman_activate_resource(struct resource *r);
83 int rman_await_resource(struct resource *r, int pri, int timo);
84 int rman_deactivate_resource(struct resource *r);
85 int rman_fini(struct rman *rm);
86 int rman_init(struct rman *rm);
87 int rman_manage_region(struct rman *rm, u_long start, u_long end);
88 int rman_release_resource(struct resource *r);
89 struct resource *rman_reserve_resource(struct rman *rm, u_long start,
90 u_long end, u_long count,
91 u_int flags, struct device *dev);
93 #define rman_get_start(r) ((r)->r_start)
94 #define rman_get_end(r) ((r)->r_end)
95 #define rman_get_flags(r) ((r)->r_flags)
96 #define rman_set_virtual(r,v) ((r)->r_virtual = (v))
97 #define rman_get_virtual(r) ((r)->r_virtual)
98 #define rman_set_bustag(r,t) ((r)->r_bustag = (t))
99 #define rman_get_bustag(r) ((r)->r_bustag)
100 #define rman_set_bushandle(r,h) ((r)->r_bushandle = (h))
101 #define rman_get_bushandle(r) ((r)->r_bushandle)
103 extern struct rman_head rman_head;
106 #endif /* !_SYS_RMAN_H_ */