1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 29 #ifndef _MACHINE_VM_H_ 30 #define _MACHINE_VM_H_ 31 32 #include <machine/pte.h> 33 34 /* Memory attributes. */ 35 #define VM_MEMATTR_DEFAULT 0 36 #define VM_MEMATTR_UNCACHEABLE 0x01 37 #define VM_MEMATTR_CACHEABLE 0x02 38 #define VM_MEMATTR_WRITE_COMBINING 0x04 39 #define VM_MEMATTR_WRITE_BACK 0x08 40 #define VM_MEMATTR_WRITE_THROUGH 0x10 41 #define VM_MEMATTR_PREFETCHABLE 0x20 42 43 #define VM_MEMATTR_DEVICE VM_MEMATTR_DEFAULT 44 45 #ifdef _KERNEL 46 #include <sys/_null.h> 47 48 static inline const char * 49 vm_memattr_name(vm_memattr_t memattr) 50 { 51 switch (memattr) { 52 case VM_MEMATTR_DEFAULT: 53 return ("default"); 54 case VM_MEMATTR_UNCACHEABLE: 55 return ("uncacheable"); 56 case VM_MEMATTR_CACHEABLE: 57 return ("cacheable"); 58 case VM_MEMATTR_WRITE_COMBINING: 59 return ("write-combining"); 60 case VM_MEMATTR_WRITE_BACK: 61 return ("write-back"); 62 case VM_MEMATTR_WRITE_THROUGH: 63 return ("write-through"); 64 case VM_MEMATTR_PREFETCHABLE: 65 return ("prefetchable"); 66 default: 67 return (NULL); 68 } 69 } 70 #endif 71 72 #endif /* !_MACHINE_VM_H_ */ 73