1 /* 2 * Copyright 1998 Massachusetts Institute of Technology 3 * 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 14 * warranty. 15 * 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 27 * SUCH DAMAGE. 28 * 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 $ 31 */ 32 33 #ifndef _SYS_RMAN_H_ 34 #define _SYS_RMAN_H_ 1 35 36 #ifndef _KERNEL 37 #include <sys/queue.h> 38 #endif 39 40 /* 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. 45 */ 46 CIRCLEQ_HEAD(resource_head, resource); 47 struct 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) */ 53 u_int r_flags; 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 */ 59 }; 60 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 */ 67 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) 73 74 enum rman_type { RMAN_UNINIT = 0, RMAN_GAUGE, RMAN_ARRAY }; 75 76 struct rman { 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 */ 84 }; 85 TAILQ_HEAD(rman_head, rman); 86 87 #ifdef _KERNEL 88 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); 100 101 #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) 110 111 extern struct rman_head rman_head; 112 #endif /* _KERNEL */ 113 114 #endif /* !_SYS_RMAN_H_ */ 115