1/*	$NetBSD: vmparam.h,v 1.48 2020/02/01 19:41:48 tsutsui Exp $	*/
2
3/*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
37 *
38 *	@(#)vmparam.h	7.3 (Berkeley) 5/7/91
39 */
40
41#ifndef _MACHINE_VMPARAM_H_
42#define _MACHINE_VMPARAM_H_
43
44/*
45 * Machine dependent constants for amiga
46 */
47
48/*
49 * Use common m68k definitions to define PAGE_SIZE and related constants.
50 */
51#include <m68k/vmparam.h>
52
53/*
54 * USRSTACK is the top (end) of the user stack.
55 */
56
57#ifndef USRSTACK
58#define	USRSTACK	0x1E000000
59#endif
60
61/*
62 * Virtual memory related constants, all in bytes
63 */
64
65#ifndef MAXTSIZ
66#define	MAXTSIZ		(32*1024*1024)		/* max text size */
67#endif
68#ifndef DFLDSIZ
69#define	DFLDSIZ		(64*1024*1024)		/* initial data size limit */
70#endif
71#ifndef MAXDSIZ
72#define	MAXDSIZ		(224*1024*1024)		/* max data size */
73#endif
74#ifndef	DFLSSIZ
75#define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
76#endif
77#ifndef	MAXSSIZ
78#define	MAXSSIZ		(32*1024*1024)		/* max stack size */
79#endif
80
81/*
82 * PTEs for mapping user space into the kernel for phyio operations.
83 * One page is enough to handle 16Mb of simultaneous raw IO operations.
84 */
85#ifndef USRIOSIZE
86#define USRIOSIZE	(1 * NPTEPG)	/* 16mb */
87#endif
88
89/*
90 * user/kernel map constants
91 */
92#define VM_MIN_ADDRESS		((vaddr_t)0)		/* user min */
93#define VM_MAX_ADDRESS		((vaddr_t)(USRSTACK))	/* user max */
94#define VM_MAXUSER_ADDRESS	((vaddr_t)(VM_MAX_ADDRESS))	/* same */
95#define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0)
96#define VM_MAX_KERNEL_ADDRESS	((vaddr_t)-(NPTEPG * PAGE_SIZE))
97
98/*
99 * virtual sizes (bytes) for various kernel submaps
100 */
101#define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
102
103/*
104 * Our bootloader currently passes up to 16 segments (but this is variable)
105 * Normally, the biggest of them is used for the kernel, and the kernel
106 * segment is given to VM first.
107 */
108#define VM_PHYSSEG_MAX		(16)
109#define VM_PHYSSEG_STRAT	VM_PSTRAT_RANDOM
110
111/*
112 * Allow supporting Zorro-II memory as lower priority:
113 *
114 *	- DEFAULT for Zorro-III memory (presumably 32 bit)
115 *	- ZORROII for Zorro-II memory (16 bit, Zorro-II DMA)
116 */
117
118#define VM_NFREELIST		2
119#define VM_FREELIST_DEFAULT	0
120#define VM_FREELIST_ZORROII	1
121
122#define	__HAVE_PMAP_PHYSSEG
123
124/*
125 * pmap-specific data stored in the vm_physmem[] array.
126 */
127struct pmap_physseg {
128	struct pv_header *pvheader;	/* pv table for this seg */
129};
130
131/*
132 * number of kernel PT pages (initial only, can grow dynamically)
133 */
134#define VM_KERNEL_PT_PAGES	((vm_size_t)10)
135#endif /* !_MACHINE_VMPARAM_H_ */
136