1/* $NetBSD: vmparam.h,v 1.51 2019/02/11 14:59:32 cherry Exp $ */
2
3/*-
4 * Copyright (c) 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * William Jolitz.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)vmparam.h 5.9 (Berkeley) 5/12/91
35 */
36
37#ifndef _X86_64_VMPARAM_H_
38#define _X86_64_VMPARAM_H_
39
40#ifdef __x86_64__
41
42#include <sys/mutex.h>
43#ifdef _KERNEL_OPT
44#include "opt_xen.h"
45#endif
46
47/*
48 * Machine dependent constants for 386.
49 */
50
51/*
52 * Page size on the amd64 s not variable in the traditional sense.
53 * We override the PAGE_* definitions to compile-time constants.
54 */
55#define PAGE_SHIFT 12
56#define PAGE_SIZE (1 << PAGE_SHIFT)
57#define PAGE_MASK (PAGE_SIZE - 1)
58
59/*
60 * Default pager_map of 16MB is awfully small. There is plenty
61 * of VA so use it.
62 */
63#define PAGER_MAP_DEFAULT_SIZE (512 * 1024 * 1024)
64
65/*
66 * USRSTACK is the top (end) of the user stack. Immediately above the
67 * user stack resides the user structure, which is UPAGES long and contains
68 * the kernel stack.
69 *
70 * Immediately after the user structure is the page table map, and then
71 * kernel address space.
72 */
73#define USRSTACK VM_MAXUSER_ADDRESS
74
75#define USRSTACK32 VM_MAXUSER_ADDRESS32
76
77/*
78 * Virtual memory related constants, all in bytes
79 */
80#define MAXTSIZ (256*1024*1024) /* max text size */
81#ifndef DFLDSIZ
82#define DFLDSIZ (256*1024*1024) /* initial data size limit */
83#endif
84#ifndef MAXDSIZ
85#define MAXDSIZ (8L*1024*1024*1024) /* max data size */
86#endif
87#ifndef DFLSSIZ
88#define DFLSSIZ (4*1024*1024) /* initial stack size limit */
89#endif
90#ifndef MAXSSIZ
91#define MAXSSIZ (128*1024*1024) /* max stack size */
92#endif
93
94/*
95 * 32bit memory related constants.
96 */
97
98#define MAXTSIZ32 (256*1024*1024)
99#ifndef DFLDSIZ32
100#define DFLDSIZ32 (256*1024*1024) /* initial data size limit */
101#endif
102#ifndef MAXDSIZ32
103#define MAXDSIZ32 (3U*1024*1024*1024) /* max data size */
104#endif
105#ifndef DFLSSIZ32
106#define DFLSSIZ32 (2*1024*1024) /* initial stack size limit */
107#endif
108#ifndef MAXSSIZ32
109#define MAXSSIZ32 (64*1024*1024) /* max stack size */
110#endif
111
112/*
113 * Size of User Raw I/O map
114 */
115#define USRIOSIZE 300
116
117/* User map constants */
118#define VM_MIN_ADDRESS 0
119#define VM_MAXUSER_ADDRESS (0x00007f8000000000 - PAGE_SIZE)
120#define VM_MAXUSER_ADDRESS32 0xfffff000
121#define VM_MAX_ADDRESS 0x00007fbfdfeff000
122
123/*
124 * Kernel map constants.
125 * MIN = VA_SIGN_NEG(L4_SLOT_KERN * NBPD_L4)
126 * MAX = MIN + NKL4_MAX_ENTRIES * NBPD_L4
127 */
128#ifndef XENPV
129#define VM_MIN_KERNEL_ADDRESS_DEFAULT 0xffff800000000000
130#define VM_MAX_KERNEL_ADDRESS_DEFAULT 0xffffa00000000000
131#else
132#define VM_MIN_KERNEL_ADDRESS_DEFAULT 0xffffa00000000000
133#define VM_MAX_KERNEL_ADDRESS_DEFAULT 0xffffc00000000000
134#endif
135
136#if defined(_KMEMUSER) || defined(_KERNEL)
137extern vaddr_t vm_min_kernel_address;
138extern vaddr_t vm_max_kernel_address;
139#define VM_MIN_KERNEL_ADDRESS vm_min_kernel_address
140#define VM_MAX_KERNEL_ADDRESS vm_max_kernel_address
141#endif
142
143/*
144 * The address to which unspecified mapping requests default
145 */
146#ifdef _KERNEL_OPT
147#include "opt_uvm.h"
148#endif
149#define __USE_TOPDOWN_VM
150
151#define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \
152 round_page((vaddr_t)(da) + (vsize_t)maxdmap)
153
154#define VM_DEFAULT_ADDRESS32_TOPDOWN(da, sz) \
155 trunc_page(USRSTACK32 - MAXSSIZ32 - (sz) - user_stack_guard_size)
156#define VM_DEFAULT_ADDRESS32_BOTTOMUP(da, sz) \
157 round_page((vaddr_t)(da) + (vsize_t)MAXDSIZ32)
158
159/* virtual sizes (bytes) for various kernel submaps */
160#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
161
162#define VM_PHYSSEG_MAX 64 /* 1 "hole" + 63 free lists */
163#define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST
164
165#define VM_NFREELIST 6
166#define VM_FREELIST_DEFAULT 0
167#define VM_FREELIST_FIRST1T 1
168#define VM_FREELIST_FIRST64G 2
169#define VM_FREELIST_FIRST4G 3
170#define VM_FREELIST_FIRST1G 4
171#define VM_FREELIST_FIRST16 5
172
173#else /* !__x86_64__ */
174
175#include <i386/vmparam.h>
176
177#endif /* __x86_64__ */
178
179#endif /* _X86_64_VMPARAM_H_ */
180