2 * Copyright 1998 Massachusetts Institute of Technology
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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 */
45 #define RF_PREFETCHABLE 0x0040 /* resource is prefetchable */
47 #define RF_ALIGNMENT_SHIFT 10 /* alignment size bit starts bit 10 */
48 #define RF_ALIGNMENT_MASK (0x003F << RF_ALIGNMENT_SHIFT)
49 /* resource address alignemnt size bit mask */
50 #define RF_ALIGNMENT_LOG2(x) ((x) << RF_ALIGNMENT_SHIFT)
51 #define RF_ALIGNMENT(x) (((x) & RF_ALIGNMENT_MASK) >> RF_ALIGNMENT_SHIFT)
53 enum rman_type { RMAN_UNINIT = 0, RMAN_GAUGE, RMAN_ARRAY };
56 * String length exported to userspace for resource names, etc.
61 * Userspace-exported structures.
64 uintptr_t r_handle; /* resource uniquifier */
65 uintptr_t r_parent; /* parent rman */
66 uintptr_t r_device; /* device owning this resource */
67 char r_devname[RM_TEXTLEN]; /* device name XXX obsolete */
69 u_long r_start; /* offset in resource space */
70 u_long r_size; /* size in resource space */
71 u_int r_flags; /* RF_* flags */
75 uintptr_t rm_handle; /* rman uniquifier */
76 char rm_descr[RM_TEXTLEN]; /* rman description */
78 u_long rm_start; /* base of managed region */
79 u_long rm_size; /* size of managed region */
80 enum rman_type rm_type; /* region type */
85 * We use a linked list rather than a bitmap because we need to be able to
86 * represent potentially huge objects (like all of a processor's physical
87 * address space). That is also why the indices are defined to have type
88 * `unsigned long' -- that being the largest integral type in ISO C (1990).
89 * The 1999 version of C allows `long long'; we may need to switch to that
90 * at some point in the future, particularly if we want to support 36-bit
91 * addresses on IA32 hardware.
93 TAILQ_HEAD(resource_head, resource);
95 TAILQ_ENTRY(resource) r_link;
96 LIST_ENTRY(resource) r_sharelink;
97 LIST_HEAD(, resource) *r_sharehead;
98 u_long r_start; /* index of the first entry in this resource */
99 u_long r_end; /* index of the last entry (inclusive) */
101 void *r_virtual; /* virtual address of this resource */
102 bus_space_tag_t r_bustag; /* bus_space tag */
103 bus_space_handle_t r_bushandle; /* bus_space handle */
104 struct device *r_dev; /* device which has allocated this resource */
105 struct rman *r_rm; /* resource manager from whence this came */
109 struct resource_head rm_list;
110 struct mtx *rm_mtx; /* mutex used to protect rm_list */
111 TAILQ_ENTRY(rman) rm_link; /* link in list of all rmans */
112 u_long rm_start; /* index of globally first entry */
113 u_long rm_end; /* index of globally last entry */
114 enum rman_type rm_type; /* what type of resource this is */
115 const char *rm_descr; /* text descripion of this resource */
117 TAILQ_HEAD(rman_head, rman);
119 int rman_activate_resource(struct resource *r);
120 int rman_await_resource(struct resource *r, int pri, int timo);
121 int rman_deactivate_resource(struct resource *r);
122 int rman_fini(struct rman *rm);
123 int rman_init(struct rman *rm);
124 int rman_manage_region(struct rman *rm, u_long start, u_long end);
125 int rman_release_resource(struct resource *r);
126 struct resource *rman_reserve_resource(struct rman *rm, u_long start,
127 u_long end, u_long count,
128 u_int flags, struct device *dev);
129 struct resource *rman_reserve_resource_bound(struct rman *rm, u_long start,
130 u_long end, u_long count, u_long bound,
131 u_int flags, struct device *dev);
132 uint32_t rman_make_alignment_flags(uint32_t size);
134 #define rman_get_start(r) ((r)->r_start)
135 #define rman_get_end(r) ((r)->r_end)
136 #define rman_get_size(r) (((r)->r_end - (r)->r_start) + 1)
137 #define rman_get_flags(r) ((r)->r_flags)
138 #define rman_set_virtual(r,v) ((r)->r_virtual = (v))
139 #define rman_get_virtual(r) ((r)->r_virtual)
140 #define rman_set_bustag(r,t) ((r)->r_bustag = (t))
141 #define rman_get_bustag(r) ((r)->r_bustag)
142 #define rman_set_bushandle(r,h) ((r)->r_bushandle = (h))
143 #define rman_get_bushandle(r) ((r)->r_bushandle)
145 extern struct rman_head rman_head;
148 #endif /* !_SYS_RMAN_H_ */