1/*	$NetBSD: vmparam.h,v 1.66.10.1 2023/05/15 10:37:24 martin 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_ */