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/*-
* Copyright (c) 2004 Mark R V Murray
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/memrange.h>
#include <sys/rwlock.h>
#include <sys/systm.h>
static struct rwlock mr_lock;
/*
* Implementation-neutral, kernel-callable functions for manipulating
* memory range attributes.
*/
void
mem_range_init(void)
{
if (mem_range_softc.mr_op == NULL)
return;
rw_init(&mr_lock, "memrange");
mem_range_softc.mr_op->init(&mem_range_softc);
}
void
mem_range_destroy(void)
{
if (mem_range_softc.mr_op == NULL)
return;
rw_destroy(&mr_lock);
}
int
mem_range_attr_get(struct mem_range_desc *mrd, int *arg)
{
int nd;
if (mem_range_softc.mr_op == NULL)
return (EOPNOTSUPP);
nd = *arg;
rw_rlock(&mr_lock);
if (nd == 0)
*arg = mem_range_softc.mr_ndesc;
else
bcopy(mem_range_softc.mr_desc, mrd, nd * sizeof(*mrd));
rw_runlock(&mr_lock);
return (0);
}
int
mem_range_attr_set(struct mem_range_desc *mrd, int *arg)
{
int ret;
if (mem_range_softc.mr_op == NULL)
return (EOPNOTSUPP);
rw_wlock(&mr_lock);
ret = mem_range_softc.mr_op->set(&mem_range_softc, mrd, arg);
rw_wunlock(&mr_lock);
return (ret);
}
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