1/* $NetBSD: vmparam.h,v 1.58 2024/09/07 06:17:37 andvar Exp $ */
2
3/*
4 * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#ifndef _ARM_ARM32_VMPARAM_H_
39#define _ARM_ARM32_VMPARAM_H_
40
41#if defined(_KERNEL_OPT)
42#include "opt_kasan.h"
43#endif
44
45/*
46 * Virtual Memory parameters common to all arm32 platforms.
47 */
48
49#include <sys/cdefs.h>
50#include <arm/cpuconf.h>
51#include <arm/arm32/param.h>
52
53#define __USE_TOPDOWN_VM
54#define USRSTACK VM_MAXUSER_ADDRESS
55
56/*
57 * ARMv4 systems are normally configured for 256MB KVA only, so restrict
58 * the size of the pager map to 4MB.
59 */
60#ifndef _ARM_ARCH_5
61#define PAGER_MAP_DEFAULT_SIZE (4 * 1024 * 1024)
62#endif
63
64/*
65 * Note that MAXTSIZ can't be larger than 32M, otherwise the compiler
66 * would have to be changed to not generate "bl" instructions.
67 */
68#define MAXTSIZ (128*1024*1024) /* max text size */
69#ifndef DFLDSIZ
70#define DFLDSIZ (384*1024*1024) /* initial data size limit */
71#endif
72#ifndef MAXDSIZ
73#define MAXDSIZ (1856*1024*1024) /* max data size */
74#endif
75#ifndef DFLSSIZ
76#define DFLSSIZ (4*1024*1024) /* initial stack size limit */
77#endif
78#ifndef MAXSSIZ
79#define MAXSSIZ (64*1024*1024) /* max stack size */
80#endif
81
82/*
83 * While the ARM architecture defines Section mappings, large pages,
84 * and small pages, the standard MMU page size is (and will always be) 4K.
85 */
86#define PAGE_SHIFT PGSHIFT
87#define PAGE_SIZE (1 << PAGE_SHIFT)
88#define PAGE_MASK (PAGE_SIZE - 1)
89
90/*
91 * Mach derived constants
92 */
93#define VM_MIN_ADDRESS ((vaddr_t) PAGE_SIZE)
94
95#define VM_MAXUSER_ADDRESS ((vaddr_t) KERNEL_BASE - PAGE_SIZE)
96#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
97
98#define VM_MIN_KERNEL_ADDRESS ((vaddr_t) KERNEL_BASE)
99#define VM_MAX_KERNEL_ADDRESS ((vaddr_t) -(PAGE_SIZE+1))
100
101#if defined(_KERNEL)
102// AddressSanitizer dedicates 1/8 of kernel memory to its shadow memory (e.g.
103// 128MB to cover 1GB for ARM) and uses a special KVA range for the shadow
104// address corresponding to a kernel memory address.
105
106/*
107 * kernel virtual space layout without direct map (common case)
108 *
109 * 0x8000_0000 - 256MB kernel text/data/bss
110 * 0x9000_0000 - 1536MB Kernel VM Space
111 * 0xf000_0000 - 256MB IO
112 *
113 * kernel virtual space layout with KASAN
114 *
115 * 0x8000_0000 - 256MB kernel text/data/bss
116 * 0x9000_0000 - 768MB Kernel VM Space
117 * 0xc000_0000 - 128MB (KASAN SHADOW MAP)
118 * 0xc800_0000 - 640MB (spare)
119 * 0xf000_0000 - 256MB IO
120 *
121 * kernel virtual space layout with direct map (1GB limited)
122 * 0x8000_0000 - 1024MB kernel text/data/bss and direct map start
123 * 0xc000_0000 - 768MB Kernel VM Space
124 * 0xf000_0000 - 256MB IO
125 *
126 */
127
128#ifdef KASAN
129#define VM_KERNEL_KASAN_BASE 0xc0000000
130#define VM_KERNEL_KASAN_SIZE (VM_KERNEL_ADDR_SIZE >> KASAN_SHADOW_SCALE_SHIFT)
131#define VM_KERNEL_KASAN_END (VM_KERNEL_KASAN_BASE + VM_KERNEL_KASAN_SIZE)
132#define VM_KERNEL_VM_END VM_KERNEL_KASAN_BASE
133#else
134#define VM_KERNEL_VM_END VM_KERNEL_IO_BASE
135#endif
136
137#ifdef __HAVE_MM_MD_DIRECT_MAPPED_PHYS
138#ifdef KASAN
139#error KASAN and __HAVE_MM_MD_DIRECT_MAPPED_PHYS is unsupported
140#endif
141#define VM_KERNEL_VM_BASE 0xc0000000
142#else
143#define VM_KERNEL_VM_BASE 0x90000000
144#endif
145
146#define VM_KERNEL_ADDR_SIZE (VM_KERNEL_VM_END - KERNEL_BASE)
147#define VM_KERNEL_VM_SIZE (VM_KERNEL_VM_END - VM_KERNEL_VM_BASE)
148
149#define VM_KERNEL_IO_BASE 0xf0000000
150#define VM_KERNEL_IO_SIZE (VM_MAX_KERNEL_ADDRESS - VM_KERNEL_IO_BASE)
151#endif
152
153#endif /* _ARM_ARM32_VMPARAM_H_ */