1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009 Alan L. Cox <alc@cs.rice.edu> 5 * 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _MACHINE_VM_H_ 32 #define _MACHINE_VM_H_ 33 34 #if __ARM_ARCH >= 6 35 #define VM_MEMATTR_WB_WA ((vm_memattr_t)0) 36 #define VM_MEMATTR_NOCACHE ((vm_memattr_t)1) 37 #define VM_MEMATTR_DEVICE ((vm_memattr_t)2) 38 #define VM_MEMATTR_SO ((vm_memattr_t)3) 39 #define VM_MEMATTR_WRITE_THROUGH ((vm_memattr_t)4) 40 41 #define VM_MEMATTR_DEFAULT VM_MEMATTR_WB_WA 42 #define VM_MEMATTR_UNCACHEABLE VM_MEMATTR_SO /* misused by DMA */ 43 #ifdef _KERNEL 44 /* Don't export aliased VM_MEMATTR to userland */ 45 #define VM_MEMATTR_WRITE_COMBINING VM_MEMATTR_WRITE_THROUGH /* for DRM */ 46 #define VM_MEMATTR_WRITE_BACK VM_MEMATTR_WB_WA /* for DRM */ 47 #endif 48 #else 49 /* Memory attribute configuration. */ 50 #define VM_MEMATTR_DEFAULT 0 51 #define VM_MEMATTR_UNCACHEABLE 1 52 #endif 53 54 #endif /* !_MACHINE_VM_H_ */ 55