xref: /freebsd/sys/arm64/include/vm.h (revision 95ee2897e98f5d444f26ed2334cc7c439f9c16c6)
1412042e2SAndrew Turner /*-
2412042e2SAndrew Turner  * Copyright (c) 2009 Alan L. Cox <alc@cs.rice.edu>
3412042e2SAndrew Turner  * All rights reserved.
4412042e2SAndrew Turner  *
5412042e2SAndrew Turner  * Redistribution and use in source and binary forms, with or without
6412042e2SAndrew Turner  * modification, are permitted provided that the following conditions
7412042e2SAndrew Turner  * are met:
8412042e2SAndrew Turner  * 1. Redistributions of source code must retain the above copyright
9412042e2SAndrew Turner  *    notice, this list of conditions and the following disclaimer.
10412042e2SAndrew Turner  * 2. Redistributions in binary form must reproduce the above copyright
11412042e2SAndrew Turner  *    notice, this list of conditions and the following disclaimer in the
12412042e2SAndrew Turner  *    documentation and/or other materials provided with the distribution.
13412042e2SAndrew Turner  *
14412042e2SAndrew Turner  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15412042e2SAndrew Turner  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16412042e2SAndrew Turner  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17412042e2SAndrew Turner  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18412042e2SAndrew Turner  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19412042e2SAndrew Turner  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20412042e2SAndrew Turner  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21412042e2SAndrew Turner  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22412042e2SAndrew Turner  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23412042e2SAndrew Turner  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24412042e2SAndrew Turner  * SUCH DAMAGE.
25412042e2SAndrew Turner  */
26412042e2SAndrew Turner 
27412042e2SAndrew Turner #ifndef _MACHINE_VM_H_
28412042e2SAndrew Turner #define	_MACHINE_VM_H_
29412042e2SAndrew Turner 
30412042e2SAndrew Turner /* Memory attribute configuration. */
3113ec5a6dSAndrew Turner #define	VM_MEMATTR_DEVICE_nGnRnE	0
32412042e2SAndrew Turner #define	VM_MEMATTR_UNCACHEABLE		1
33412042e2SAndrew Turner #define	VM_MEMATTR_WRITE_BACK		2
34c031b4b0SAndrew Turner #define	VM_MEMATTR_WRITE_THROUGH	3
3513ec5a6dSAndrew Turner #define	VM_MEMATTR_DEVICE_nGnRE		4
3613ec5a6dSAndrew Turner 
37*3473f283SAndrew Turner #define	VM_MEMATTR_DEVICE		VM_MEMATTR_DEVICE_nGnRE
382abd4f85SAndrew Turner #define	VM_MEMATTR_DEVICE_NP		VM_MEMATTR_DEVICE_nGnRnE
39c031b4b0SAndrew Turner 
40c031b4b0SAndrew Turner #ifdef _KERNEL
41c031b4b0SAndrew Turner /* If defined vmstat will try to use both of these in a switch statement */
42c031b4b0SAndrew Turner #define	VM_MEMATTR_WRITE_COMBINING	VM_MEMATTR_WRITE_THROUGH
43c031b4b0SAndrew Turner #endif
44412042e2SAndrew Turner 
45412042e2SAndrew Turner #define	VM_MEMATTR_DEFAULT	VM_MEMATTR_WRITE_BACK
46412042e2SAndrew Turner 
47412042e2SAndrew Turner #endif /* !_MACHINE_VM_H_ */
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