1 /* $NetBSD: vmparam.h,v 1.20 2023/04/16 14:01:51 skrll 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 64 /* 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_ */ 195