1/* $NetBSD: vmparam.h,v 1.67 2023/05/14 18:44:27 he Exp $ */
2
3/*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1992, 1993
6 * The Regents of the University of California. 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 and Ralph Campbell.
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 8.2 (Berkeley) 4/22/94
39 */
40
41#ifndef _MIPS_VMPARAM_H_
42#define _MIPS_VMPARAM_H_
43
44#ifdef _KERNEL_OPT
45#include "opt_cputype.h"
46#include "opt_multiprocessor.h"
47#include "opt_modular.h"
48#endif
49
50/*
51 * Machine dependent VM constants for MIPS.
52 */
53
54/*
55 * We normally use a 4K page but may use 16K on MIPS systems.
56 * Override PAGE_* definitions to compile-time constants.
57 */
58#ifdef ENABLE_MIPS_16KB_PAGE
59#define PAGE_SHIFT 14
60#elif defined(ENABLE_MIPS_8KB_PAGE) \
61 || (!defined(ENABLE_MIPS_4KB_PAGE) && __mips >= 3)
62#define PAGE_SHIFT 13
63#else /* defined(ENABLE_MIPS_4KB_PAGE) */
64#define PAGE_SHIFT 12
65#endif
66#define PAGE_SIZE (1 << PAGE_SHIFT)
67#define PAGE_MASK (PAGE_SIZE - 1)
68
69#define MIN_PAGE_SHIFT 12
70#define MAX_PAGE_SHIFT 14
71
72#define MAX_PAGE_SIZE (1 << MAX_PAGE_SHIFT)
73#define MIN_PAGE_SIZE (1 << MIN_PAGE_SHIFT)
74
75/*
76 * USRSTACK is the top (end) of the user stack.
77 *
78 * USRSTACK needs to start a little below 0x8000000 because the R8000
79 * and some QED CPUs perform some virtual address checks before the
80 * offset is calculated. We use 0x8000 since that's the max displacement
81 * in an instruction.
82 */
83#define USRSTACK (VM_MAXUSER_ADDRESS-0x8000) /* Start of user stack */
84#define USRSTACK32 ((uint32_t)VM_MAXUSER_ADDRESS32-0x8000)
85
86/*
87 * Virtual memory related constants, all in bytes
88 */
89#if defined(__mips_o32)
90#ifndef MAXTSIZ
91#define MAXTSIZ (128*1024*1024) /* max text size */
92#endif
93#ifndef DFLDSIZ
94#define DFLDSIZ (128*1024*1024) /* initial data size limit */
95#endif
96#ifndef MAXDSIZ
97#define MAXDSIZ (512*1024*1024) /* max data size */
98#endif
99#ifndef DFLSSIZ
100#define DFLSSIZ (4*1024*1024) /* initial stack size limit */
101#endif
102#ifndef MAXSSIZ
103#define MAXSSIZ (32*1024*1024) /* max stack size */
104#endif
105#else
106/*
107 * 64-bit ABIs need more space.
108 */
109#ifndef MAXTSIZ
110#define MAXTSIZ (128*1024*1024) /* max text size */
111#endif
112#ifndef DFLDSIZ
113#define DFLDSIZ (256*1024*1024) /* initial data size limit */
114#endif
115#ifndef MAXDSIZ
116#define MAXDSIZ (1536*1024*1024) /* max data size */
117#endif
118#ifndef DFLSSIZ
119#define DFLSSIZ (4*1024*1024) /* initial stack size limit */
120#endif
121#ifndef MAXSSIZ
122#define MAXSSIZ (120*1024*1024) /* max stack size */
123#endif
124#endif /* !__mips_o32 */
125
126/*
127 * Virtual memory related constants, all in bytes
128 */
129#ifndef DFLDSIZ32
130#define DFLDSIZ32 DFLDSIZ /* initial data size limit */
131#endif
132#ifndef MAXDSIZ32
133#define MAXDSIZ32 MAXDSIZ /* max data size */
134#endif
135#ifndef DFLSSIZ32
136#define DFLSSIZ32 DFLTSIZ /* initial stack size limit */
137#endif
138#ifndef MAXSSIZ32
139#define MAXSSIZ32 MAXSSIZ /* max stack size */
140#endif
141
142/*
143 * PTEs for mapping user space into the kernel for phyio operations.
144 * The default PTE number is enough to cover 8 disks * MAXBSIZE.
145 */
146#ifndef USRIOSIZE
147#define USRIOSIZE (MAXBSIZE/PAGE_SIZE * 8)
148#endif
149
150/*
151 * Mach derived constants
152 */
153
154/*
155 * user/kernel map constants
156 * These are negative addresses since MIPS addresses are signed.
157 */
158#define VM_MIN_ADDRESS ((vaddr_t)0x00000000)
159#ifdef _LP64
160#define MIPS_VM_MAXUSER_ADDRESS ((vaddr_t) 1L << 40)
161#ifdef ENABLE_MIPS_16KB_PAGE
162#define VM_MAXUSER_ADDRESS mips_vm_maxuser_address
163#else
164#define VM_MAXUSER_ADDRESS MIPS_VM_MAXUSER_ADDRESS
165#endif
166#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS /* 0x0000010000000000 */
167#define VM_MIN_KERNEL_ADDRESS ((vaddr_t) 3L << 62) /* 0xC000000000000000 */
168#define VM_MAX_KERNEL_ADDRESS ((vaddr_t) -1L << 31) /* 0xFFFFFFFF80000000 */
169#else
170#define VM_MAXUSER_ADDRESS ((vaddr_t)-0x7fffffff-1)/* 0xFFFFFFFF80000000 */
171#define VM_MAX_ADDRESS ((vaddr_t)-0x7fffffff-1)/* 0xFFFFFFFF80000000 */
172#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)-0x40000000) /* 0xFFFFFFFFC0000000 */
173#ifdef ENABLE_MIPS_TX3900
174#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)-0x01000000) /* 0xFFFFFFFFFF000000 */
175#else
176#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)-0x00004000) /* 0xFFFFFFFFFFFFC000 */
177#endif
178#endif
179#define VM_MAXUSER_ADDRESS32 ((vaddr_t)(1UL << 31)) /* 0x0000000080000000 */
180
181/*
182 * The address to which unspecified mapping requests default
183 */
184#define __USE_TOPDOWN_VM
185
186#define VM_DEFAULT_ADDRESS_TOPDOWN(da, sz) \
187 trunc_page(USRSTACK - MAXSSIZ - (sz) - user_stack_guard_size)
188#define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \
189 round_page((vaddr_t)(da) + (vsize_t)maxdmap)
190
191#define VM_DEFAULT_ADDRESS32_TOPDOWN(da, sz) \
192 trunc_page(USRSTACK32 - MAXSSIZ32 - (sz) - user_stack_guard_size)
193#define VM_DEFAULT_ADDRESS32_BOTTOMUP(da, sz) \
194 round_page((vaddr_t)(da) + (vsize_t)MAXDSIZ32)
195
196/* virtual sizes (bytes) for various kernel submaps */
197#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
198
199/* VM_PHYSSEG_MAX defined by platform-dependent code. */
200#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
201
202#ifndef VM_NFREELIST
203#define VM_NFREELIST 16 /* 16 distinct memory segments */
204#define VM_FREELIST_DEFAULT 0
205#define VM_FREELIST_MAX 1
206#endif
207
208#ifdef _KERNEL
209#ifdef ENABLE_MIPS_16KB_PAGE
210extern vaddr_t mips_vm_maxuser_address;
211#endif
212#endif
213
214#endif /* ! _MIPS_VMPARAM_H_ */