1/* $NetBSD: vmparam.h,v 1.21 2024/06/30 09:36:43 jmcneill Exp $ */
2
3/*-
4 * Copyright (c) 2014 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas of 3am Software Foundry.
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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef _AARCH64_VMPARAM_H_
33#define _AARCH64_VMPARAM_H_
34
35#ifdef __aarch64__
36
37#define __USE_TOPDOWN_VM
38
39/*
40 * Default pager_map of 16MB is small and we have plenty of VA to burn.
41 */
42#define PAGER_MAP_DEFAULT_SIZE (512 * 1024 * 1024)
43
44/*
45 * Defaults for Unified Buffer Cache parameters.
46 */
47
48#ifndef UBC_WINSHIFT
49#define UBC_WINSHIFT 16 /* 64kB */
50#endif
51#ifndef UBC_NWINS
52#define UBC_NWINS 4096 /* 256MB */
53#endif
54
55/*
56 * AARCH64 supports 3 page sizes: 4KB, 16KB, 64KB. Each page table can
57 * even have its own page size.
58 */
59
60#ifdef AARCH64_PAGE_SHIFT
61#if (1 << AARCH64_PAGE_SHIFT) & ~0x141000
62#error AARCH64_PAGE_SHIFT contains an unsupported value.
63#endif
64#define PAGE_SHIFT AARCH64_PAGE_SHIFT
65#else
66#define PAGE_SHIFT 12
67#endif
68#define PAGE_SIZE (1 << PAGE_SHIFT)
69#define PAGE_MASK (PAGE_SIZE - 1)
70
71#if PAGE_SHIFT <= 14
72#define USPACE 32768
73#else
74#define USPACE 65536
75#endif
76#define UPAGES (USPACE >> PAGE_SHIFT)
77
78/*
79 * USRSTACK is the top (end) of the user stack. The user VA space is a
80 * 48-bit address space starting at 0. Place the stack at its top end.
81 */
82#define USRSTACK VM_MAXUSER_ADDRESS
83
84#ifndef MAXTSIZ
85#define MAXTSIZ (1L << 30) /* max text size (1GB) */
86#endif
87
88#ifndef MAXDSIZ
89#define MAXDSIZ (1L << 36) /* max data size (64GB) */
90#endif
91
92#ifndef MAXSSIZ
93#define MAXSSIZ (1L << 26) /* max stack size (64MB) */
94#endif
95
96#ifndef DFLDSIZ
97#define DFLDSIZ (1L << 32) /* default data size (4GB) */
98#endif
99
100#ifndef DFLSSIZ
101#define DFLSSIZ (1L << 23) /* default stack size (8MB) */
102#endif
103
104#define USRSTACK32 VM_MAXUSER_ADDRESS32
105
106#ifndef MAXDSIZ32
107#define MAXDSIZ32 (3U*1024*1024*1024) /* max data size */
108#endif
109
110#ifndef MAXSSIZ32
111#define MAXSSIZ32 (64*1024*1024) /* max stack size */
112#endif
113
114#ifndef DFLDSIZ32
115#define DFLDSIZ32 (1L << 27) /* 32bit default data size (128MB) */
116#endif
117
118#ifndef DFLSSIZ32
119#define DFLSSIZ32 (1L << 21) /* 32bit default stack size (2MB) */
120#endif
121
122#define VM_MIN_ADDRESS ((vaddr_t) 0x0)
123#define VM_MAXUSER_ADDRESS ((vaddr_t) (1L << 48) - PAGE_SIZE)
124#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
125
126#define VM_MAXUSER_ADDRESS32 ((vaddr_t) 0xfffff000)
127
128/*
129 * kernel virtual space layout:
130 * 0xffff_0000_0000_0000 - 64T direct mapping
131 * 0xffff_4000_0000_0000 - 32T (KASAN SHADOW MAP)
132 * 0xffff_6000_0000_0000 - 32T (not used)
133 * 0xffff_8000_0000_0000 - 1G (EFI_RUNTIME - legacy)
134 * 0xffff_8000_4000_0000 - 64T (not used)
135 * 0xffff_c000_0000_0000 - 64T KERNEL VM Space (including text/data/bss)
136 * (0xffff_c000_4000_0000 -1GB) KERNEL VM start of KVM
137 * 0xffff_ffff_f000_0000 - 254M KERNEL_IO for pmap_devmap
138 * 0xffff_ffff_ffe0_0000 - 2M RESERVED
139 */
140#define VM_MIN_KERNEL_ADDRESS ((vaddr_t) 0xffffc00000000000L)
141#define VM_MAX_KERNEL_ADDRESS ((vaddr_t) 0xffffffffffe00000L)
142
143/*
144 * Reserved space for EFI runtime services (legacy)
145 */
146#define EFI_RUNTIME_VA 0xffff800000000000L
147#define EFI_RUNTIME_SIZE 0x0000000040000000L
148
149
150/*
151 * last 254MB of kernel vm area (0xfffffffff0000000-0xffffffffffe00000)
152 * may be used for devmap. see aarch64/pmap.c:pmap_devmap_*
153 */
154#define VM_KERNEL_IO_BASE 0xfffffffff0000000L
155#define VM_KERNEL_IO_SIZE (VM_MAX_KERNEL_ADDRESS - VM_KERNEL_IO_BASE)
156
157#define VM_KERNEL_VM_BASE (0xffffc00040000000L)
158#define VM_KERNEL_VM_SIZE (VM_KERNEL_IO_BASE - VM_KERNEL_VM_BASE)
159
160/* virtual sizes (bytes) for various kernel submaps */
161#define USRIOSIZE (PAGE_SIZE / 8)
162#define VM_PHYS_SIZE (USRIOSIZE * PAGE_SIZE)
163
164#define VM_DEFAULT_ADDRESS32_TOPDOWN(da, sz) \
165 trunc_page(USRSTACK32 - MAXSSIZ32 - (sz) - user_stack_guard_size)
166#define VM_DEFAULT_ADDRESS32_BOTTOMUP(da, sz) \
167 round_page((vaddr_t)(da) + (vsize_t)MAXDSIZ32)
168
169/*
170 * Since we have the address space, we map all of physical memory (RAM)
171 * using block page table entries.
172 */
173#define AARCH64_DIRECTMAP_MASK ((vaddr_t) 0xffff000000000000L)
174#define AARCH64_DIRECTMAP_SIZE (1UL << 46) /* 64TB */
175#define AARCH64_DIRECTMAP_START AARCH64_DIRECTMAP_MASK
176#define AARCH64_DIRECTMAP_END (AARCH64_DIRECTMAP_START + AARCH64_DIRECTMAP_SIZE)
177#define AARCH64_KVA_P(va) (((vaddr_t) (va) & AARCH64_DIRECTMAP_MASK) != 0)
178#define AARCH64_PA_TO_KVA(pa) ((vaddr_t) ((pa) | AARCH64_DIRECTMAP_START))
179#define AARCH64_KVA_TO_PA(va) ((paddr_t) ((va) & ~AARCH64_DIRECTMAP_MASK))
180
181/* */
182#define VM_PHYSSEG_MAX 256 /* XXX */
183#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
184
185#define VM_NFREELIST 1
186#define VM_FREELIST_DEFAULT 0
187
188#elif defined(__arm__)
189
190#include <arm/vmparam.h>
191
192#endif /* __aarch64__/__arm__ */
193
194#endif /* _AARCH64_VMPARAM_H_ */