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/*
* Copyright 1998 Massachusetts Institute of Technology
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that both the above copyright notice and this
* permission notice appear in all copies, that both the above
* copyright notice and this permission notice appear in all
* supporting documentation, and that the name of M.I.T. not be used
* in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. M.I.T. makes
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied
* warranty.
*
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: rman.h,v 1.1 1998/10/29 01:48:30 wollman Exp $
*/
#ifndef _SYS_RMAN_H_
#define _SYS_RMAN_H_ 1
#ifndef KERNEL
#include <sys/queue.h>
#endif /* !KERNEL */
/*
* We use a linked list rather than a bitmap because we need to be able to
* represent potentially huge objects (like all of a processor's physical
* address space). That is also why the indices are defined to have type
* `unsigned long' -- that being the largest integral type in Standard C.
*/
CIRCLEQ_HEAD(resource_head, resource);
struct resource {
CIRCLEQ_ENTRY(resource) r_link;
LIST_ENTRY(resource) r_sharelink;
LIST_HEAD(, resource) *r_sharehead;
u_long r_start; /* index of the first entry in this resource */
u_long r_end; /* index of the last entry (inclusive) */
u_int r_flags;
void *r_virtual; /* virtual address of this resource */
struct device *r_dev; /* device which has allocated this resource */
struct rman *r_rm; /* resource manager from whence this came */
};
#define RF_ALLOCATED 0x0001 /* resource has been reserved */
#define RF_ACTIVE 0x0002 /* resource allocation has been activated */
#define RF_SHAREABLE 0x0004 /* resource permits contemporaneous sharing */
#define RF_TIMESHARE 0x0008 /* resource permits time-division sharing */
#define RF_WANTED 0x0010 /* somebody is waiting for this resource */
#define RF_FIRSTSHARE 0x0020 /* first in sharing list */
enum rman_type { RMAN_UNINIT = 0, RMAN_GAUGE, RMAN_ARRAY };
struct rman {
struct resource_head rm_list;
struct simplelock *rm_slock; /* mutex used to protect rm_list */
TAILQ_ENTRY(rman) rm_link; /* link in list of all rmans */
u_long rm_start; /* index of globally first entry */
u_long rm_end; /* index of globally last entry */
enum rman_type rm_type; /* what type of resource this is */
const char *rm_descr; /* text descripion of this resource */
};
TAILQ_HEAD(rman_head, rman);
#ifdef KERNEL
int rman_activate_resource(struct resource *r);
int rman_await_resource(struct resource *r, int pri, int timo);
int rman_deactivate_resource(struct resource *r);
int rman_fini(struct rman *rm);
int rman_init(struct rman *rm);
int rman_manage_region(struct rman *rm, u_long start, u_long end);
int rman_release_resource(struct resource *r);
struct resource *rman_reserve_resource(struct rman *rm, u_long start,
u_long end, u_long count,
u_int flags, struct device *dev);
#define rman_set_virtual(r,v) ((r)->r_virtual = (v))
#define rman_get_virtual(r) ((r)->r_virtual)
extern struct rman_head rman_head;
#endif /* KERNEL */
#endif /* !_SYS_RMAN_H_ */