1/*- 2 * Copyright (c) 2004 Mark R V Murray 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30#include <sys/param.h> 31#include <sys/kernel.h> 32#include <sys/lock.h> 33#include <sys/malloc.h> 34#include <sys/memrange.h> 35#include <sys/rwlock.h> 36#include <sys/systm.h> 37 38static struct rwlock mr_lock; 39 40/* 41 * Implementation-neutral, kernel-callable functions for manipulating 42 * memory range attributes. 43 */ 44void 45mem_range_init(void) 46{ 47 48 if (mem_range_softc.mr_op == NULL) 49 return; 50 rw_init(&mr_lock, "memrange"); 51 mem_range_softc.mr_op->init(&mem_range_softc); 52} 53 54void 55mem_range_destroy(void) 56{ 57 58 if (mem_range_softc.mr_op == NULL) 59 return; 60 rw_destroy(&mr_lock); 61} 62 63int 64mem_range_attr_get(struct mem_range_desc *mrd, int *arg) 65{ 66 int nd; 67 68 if (mem_range_softc.mr_op == NULL) 69 return (EOPNOTSUPP); 70 nd = *arg; 71 rw_rlock(&mr_lock); 72 if (nd == 0) 73 *arg = mem_range_softc.mr_ndesc; 74 else 75 bcopy(mem_range_softc.mr_desc, mrd, nd * sizeof(*mrd)); 76 rw_runlock(&mr_lock); 77 return (0); 78} 79 80int 81mem_range_attr_set(struct mem_range_desc *mrd, int *arg) 82{ 83 int ret; 84 85 if (mem_range_softc.mr_op == NULL) 86 return (EOPNOTSUPP); 87 rw_wlock(&mr_lock); 88 ret = mem_range_softc.mr_op->set(&mem_range_softc, mrd, arg); 89 rw_wunlock(&mr_lock); 90 return (ret); 91} 92