1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)vm_extern.h 8.2 (Berkeley) 1/12/94 32 * $FreeBSD$ 33 */ 34 35#ifndef _VM_EXTERN_H_ 36#define _VM_EXTERN_H_ 37 38/* 39 * Is pa a multiple of alignment, which is a power-of-two? 40 */ 41static inline bool 42vm_addr_align_ok(vm_paddr_t pa, u_long alignment) 43{ 44 KASSERT(powerof2(alignment), ("%s: alignment is not a power of 2: %#lx", 45 __func__, alignment)); 46 return ((pa & (alignment - 1)) == 0); 47} 48 49/* 50 * Do the first and last addresses of a range match in all bits except the ones 51 * in -boundary (a power-of-two)? For boundary == 0, all addresses match. 52 */ 53static inline bool 54vm_addr_bound_ok(vm_paddr_t pa, vm_paddr_t size, vm_paddr_t boundary) 55{ 56 KASSERT(powerof2(boundary), ("%s: boundary is not a power of 2: %#jx", 57 __func__, (uintmax_t)boundary)); 58 return (((pa ^ (pa + size - 1)) & -boundary) == 0); 59} 60 61static inline bool 62vm_addr_ok(vm_paddr_t pa, vm_paddr_t size, u_long alignment, 63 vm_paddr_t boundary) 64{ 65 return (vm_addr_align_ok(pa, alignment) && 66 vm_addr_bound_ok(pa, size, boundary)); 67} 68 69#endif /* !_VM_EXTERN_H_ */ 70