145 lines
5.6 KiB
C
145 lines
5.6 KiB
C
/*
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* Copyright 1998 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_RMAN_H_
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#define _SYS_RMAN_H_ 1
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#ifndef _KERNEL
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#include <sys/queue.h>
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#endif
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#define RF_ALLOCATED 0x0001 /* resource has been reserved */
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#define RF_ACTIVE 0x0002 /* resource allocation has been activated */
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#define RF_SHAREABLE 0x0004 /* resource permits contemporaneous sharing */
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#define RF_TIMESHARE 0x0008 /* resource permits time-division sharing */
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#define RF_WANTED 0x0010 /* somebody is waiting for this resource */
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#define RF_FIRSTSHARE 0x0020 /* first in sharing list */
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#define RF_ALIGNMENT_SHIFT 10 /* alignment size bit starts bit 10 */
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#define RF_ALIGNMENT_MASK (0x003F << RF_ALIGNMENT_SHIFT)
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/* resource address alignemnt size bit mask */
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#define RF_ALIGNMENT_LOG2(x) ((x) << RF_ALIGNMENT_SHIFT)
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#define RF_ALIGNMENT(x) (((x) & RF_ALIGNMENT_MASK) >> RF_ALIGNMENT_SHIFT)
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enum rman_type { RMAN_UNINIT = 0, RMAN_GAUGE, RMAN_ARRAY };
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/*
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* String length exported to userspace for resource names, etc.
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*/
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#define RM_TEXTLEN 32
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/*
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* Userspace-exported structures.
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*/
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struct u_resource {
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uintptr_t r_handle; /* resource uniquifier */
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uintptr_t r_parent; /* parent rman */
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uintptr_t r_device; /* device owning this resource */
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char r_devname[RM_TEXTLEN]; /* device name XXX obsolete */
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u_long r_start; /* offset in resource space */
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u_long r_size; /* size in resource space */
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u_int r_flags; /* RF_* flags */
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};
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struct u_rman {
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uintptr_t rm_handle; /* rman uniquifier */
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char rm_descr[RM_TEXTLEN]; /* rman description */
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u_long rm_start; /* base of managed region */
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u_long rm_size; /* size of managed region */
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enum rman_type rm_type; /* region type */
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};
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#ifdef _KERNEL
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/*
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* We use a linked list rather than a bitmap because we need to be able to
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* represent potentially huge objects (like all of a processor's physical
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* address space). That is also why the indices are defined to have type
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* `unsigned long' -- that being the largest integral type in ISO C (1990).
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* The 1999 version of C allows `long long'; we may need to switch to that
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* at some point in the future, particularly if we want to support 36-bit
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* addresses on IA32 hardware.
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*/
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TAILQ_HEAD(resource_head, resource);
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struct resource {
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TAILQ_ENTRY(resource) r_link;
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LIST_ENTRY(resource) r_sharelink;
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LIST_HEAD(, resource) *r_sharehead;
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u_long r_start; /* index of the first entry in this resource */
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u_long r_end; /* index of the last entry (inclusive) */
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u_int r_flags;
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void *r_virtual; /* virtual address of this resource */
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bus_space_tag_t r_bustag; /* bus_space tag */
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bus_space_handle_t r_bushandle; /* bus_space handle */
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struct device *r_dev; /* device which has allocated this resource */
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struct rman *r_rm; /* resource manager from whence this came */
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};
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struct rman {
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struct resource_head rm_list;
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struct mtx *rm_mtx; /* mutex used to protect rm_list */
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TAILQ_ENTRY(rman) rm_link; /* link in list of all rmans */
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u_long rm_start; /* index of globally first entry */
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u_long rm_end; /* index of globally last entry */
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enum rman_type rm_type; /* what type of resource this is */
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const char *rm_descr; /* text descripion of this resource */
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};
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TAILQ_HEAD(rman_head, rman);
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int rman_activate_resource(struct resource *r);
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int rman_await_resource(struct resource *r, int pri, int timo);
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int rman_deactivate_resource(struct resource *r);
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int rman_fini(struct rman *rm);
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int rman_init(struct rman *rm);
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int rman_manage_region(struct rman *rm, u_long start, u_long end);
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int rman_release_resource(struct resource *r);
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struct resource *rman_reserve_resource(struct rman *rm, u_long start,
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u_long end, u_long count,
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u_int flags, struct device *dev);
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uint32_t rman_make_alignment_flags(uint32_t size);
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#define rman_get_start(r) ((r)->r_start)
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#define rman_get_end(r) ((r)->r_end)
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#define rman_get_size(r) (((r)->r_end - (r)->r_start) + 1)
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#define rman_get_flags(r) ((r)->r_flags)
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#define rman_set_virtual(r,v) ((r)->r_virtual = (v))
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#define rman_get_virtual(r) ((r)->r_virtual)
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#define rman_set_bustag(r,t) ((r)->r_bustag = (t))
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#define rman_get_bustag(r) ((r)->r_bustag)
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#define rman_set_bushandle(r,h) ((r)->r_bushandle = (h))
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#define rman_get_bushandle(r) ((r)->r_bushandle)
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extern struct rman_head rman_head;
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#endif /* _KERNEL */
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#endif /* !_SYS_RMAN_H_ */
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