master
1/* $NetBSD: vmparam.h,v 1.55 2022/08/20 23:48:50 riastradh 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 * Defaults for Unified Buffer Cache parameters.
67 */
68
69#ifndef UBC_WINSHIFT
70#define UBC_WINSHIFT 16 /* 64kB */
71#endif
72#ifndef UBC_NWINS
73#define UBC_NWINS 4096 /* 256MB */
74#endif
75
76/*
77 * USRSTACK is the top (end) of the user stack. Immediately above the
78 * user stack resides the user structure, which is UPAGES long and contains
79 * the kernel stack.
80 *
81 * Immediately after the user structure is the page table map, and then
82 * kernel address space.
83 */
84#define USRSTACK VM_MAXUSER_ADDRESS
85
86#define USRSTACK32 VM_MAXUSER_ADDRESS32
87
88/*
89 * Virtual memory related constants, all in bytes
90 */
91#define MAXTSIZ (8L*1024*1024*1024) /* max text size */
92#ifndef DFLDSIZ
93#define DFLDSIZ (256*1024*1024) /* initial data size limit */
94#endif
95#ifndef MAXDSIZ
96#define MAXDSIZ (8L*1024*1024*1024) /* max data size */
97#endif
98#ifndef DFLSSIZ
99#define DFLSSIZ (4*1024*1024) /* initial stack size limit */
100#endif
101#ifndef MAXSSIZ
102#define MAXSSIZ (128*1024*1024) /* max stack size */
103#endif
104
105/*
106 * 32bit memory related constants.
107 */
108
109#ifndef DFLDSIZ32
110#define DFLDSIZ32 (256*1024*1024) /* initial data size limit */
111#endif
112#ifndef MAXDSIZ32
113#define MAXDSIZ32 (3U*1024*1024*1024) /* max data size */
114#endif
115#ifndef DFLSSIZ32
116#define DFLSSIZ32 (2*1024*1024) /* initial stack size limit */
117#endif
118#ifndef MAXSSIZ32
119#define MAXSSIZ32 (64*1024*1024) /* max stack size */
120#endif
121
122/*
123 * Size of User Raw I/O map
124 */
125#define USRIOSIZE 300
126
127/* User map constants */
128#define VM_MIN_ADDRESS 0
129#define VM_MAXUSER_ADDRESS (0x00007f8000000000 - PAGE_SIZE)
130#define VM_MAXUSER_ADDRESS32 0xfffff000
131#define VM_MAX_ADDRESS 0x00007fbfdfeff000
132
133/*
134 * Kernel map constants.
135 * MIN = VA_SIGN_NEG(L4_SLOT_KERN * NBPD_L4)
136 * MAX = MIN + NKL4_MAX_ENTRIES * NBPD_L4
137 */
138#ifndef XENPV
139#define VM_MIN_KERNEL_ADDRESS_DEFAULT 0xffff800000000000
140#define VM_MAX_KERNEL_ADDRESS_DEFAULT 0xffffa00000000000
141#else
142#define VM_MIN_KERNEL_ADDRESS_DEFAULT 0xffffa00000000000
143#define VM_MAX_KERNEL_ADDRESS_DEFAULT 0xffffc00000000000
144#endif
145
146#if defined(_KMEMUSER) || defined(_KERNEL)
147extern vaddr_t vm_min_kernel_address;
148extern vaddr_t vm_max_kernel_address;
149#define VM_MIN_KERNEL_ADDRESS vm_min_kernel_address
150#define VM_MAX_KERNEL_ADDRESS vm_max_kernel_address
151#endif
152
153#define PDP_SIZE 1
154
155/*
156 * The address to which unspecified mapping requests default
157 */
158#ifdef _KERNEL_OPT
159#include "opt_uvm.h"
160#endif
161#define __USE_TOPDOWN_VM
162
163#define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \
164 round_page((vaddr_t)(da) + (vsize_t)maxdmap)
165
166#define VM_DEFAULT_ADDRESS32_TOPDOWN(da, sz) \
167 trunc_page(USRSTACK32 - MAXSSIZ32 - (sz) - user_stack_guard_size)
168#define VM_DEFAULT_ADDRESS32_BOTTOMUP(da, sz) \
169 round_page((vaddr_t)(da) + (vsize_t)MAXDSIZ32)
170
171/* virtual sizes (bytes) for various kernel submaps */
172#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
173
174#define VM_PHYSSEG_MAX 64 /* 1 "hole" + 63 free lists */
175#define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST
176
177#define VM_NFREELIST 6
178#define VM_FREELIST_DEFAULT 0
179#define VM_FREELIST_FIRST1T 1
180#define VM_FREELIST_FIRST64G 2
181#define VM_FREELIST_FIRST4G 3
182#define VM_FREELIST_FIRST1G 4
183#define VM_FREELIST_FIRST16 5
184
185#else /* !__x86_64__ */
186
187#include <i386/vmparam.h>
188
189#endif /* __x86_64__ */
190
191#endif /* _X86_64_VMPARAM_H_ */