1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 * $NetBSD: vmparam.h,v 1.11 2000/02/11 19:25:16 thorpej Exp $ 34 * $FreeBSD$ 35 */ 36 37 #ifndef _MACHINE_VMPARAM_H_ 38 #define _MACHINE_VMPARAM_H_ 39 40 #ifndef LOCORE 41 #include <machine/md_var.h> 42 #endif 43 44 #define USRSTACK SHAREDPAGE 45 46 #ifndef MAXTSIZ 47 #define MAXTSIZ (1*1024*1024*1024) /* max text size */ 48 #endif 49 50 #ifndef DFLDSIZ 51 #define DFLDSIZ (128*1024*1024) /* default data size */ 52 #endif 53 54 #ifndef MAXDSIZ 55 #ifdef __powerpc64__ 56 #define MAXDSIZ (32UL*1024*1024*1024) /* max data size */ 57 #else 58 #define MAXDSIZ (1*1024*1024*1024) /* max data size */ 59 #endif 60 #endif 61 62 #ifndef DFLSSIZ 63 #define DFLSSIZ (8*1024*1024) /* default stack size */ 64 #endif 65 66 #ifndef MAXSSIZ 67 #ifdef __powerpc64__ 68 #define MAXSSIZ (512*1024*1024) /* max stack size */ 69 #else 70 #define MAXSSIZ (64*1024*1024) /* max stack size */ 71 #endif 72 #endif 73 74 #ifdef AIM 75 #define VM_MAXUSER_ADDRESS32 0xfffff000 76 #else 77 #define VM_MAXUSER_ADDRESS32 0x7ffff000 78 #endif 79 80 /* 81 * Would like to have MAX addresses = 0, but this doesn't (currently) work 82 */ 83 #ifdef __powerpc64__ 84 #define VM_MIN_ADDRESS 0x0000000000000000 85 #define VM_MAXUSER_ADDRESS 0x3ffffffffffff000 86 #define VM_MAX_ADDRESS 0xffffffffffffffff 87 #define VM_MIN_KERNEL_ADDRESS 0xe000000000000000 88 #define VM_MAX_KERNEL_ADDRESS 0xe0000007ffffffff 89 #define VM_MAX_SAFE_KERNEL_ADDRESS VM_MAX_KERNEL_ADDRESS 90 #else 91 #define VM_MIN_ADDRESS 0 92 #define VM_MAXUSER_ADDRESS VM_MAXUSER_ADDRESS32 93 #define VM_MAX_ADDRESS 0xffffffff 94 #endif 95 96 #define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE) 97 98 #define FREEBSD32_SHAREDPAGE (VM_MAXUSER_ADDRESS32 - PAGE_SIZE) 99 #define FREEBSD32_USRSTACK FREEBSD32_SHAREDPAGE 100 101 #define KERNBASE 0x00100100 /* start of kernel virtual */ 102 103 #ifdef AIM 104 #ifndef __powerpc64__ 105 #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNEL_SR << ADDR_SR_SHFT) 106 #define VM_MAX_SAFE_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH -1) 107 #define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 3*SEGMENT_LENGTH - 1) 108 #endif 109 110 /* 111 * Use the direct-mapped BAT registers for UMA small allocs. This 112 * takes pressure off the small amount of available KVA. 113 */ 114 #define UMA_MD_SMALL_ALLOC 115 116 #else /* Book-E */ 117 118 /* Use the direct map for UMA small allocs on powerpc64. */ 119 #ifdef __powerpc64__ 120 #define UMA_MD_SMALL_ALLOC 121 #else 122 #define VM_MIN_KERNEL_ADDRESS 0xc0000000 123 #define VM_MAX_KERNEL_ADDRESS 0xffffefff 124 #define VM_MAX_SAFE_KERNEL_ADDRESS VM_MAX_KERNEL_ADDRESS 125 #endif 126 127 #endif /* AIM/E500 */ 128 129 #if !defined(LOCORE) 130 struct pmap_physseg { 131 struct pv_entry *pvent; 132 char *attrs; 133 }; 134 #endif 135 136 #define VM_PHYSSEG_MAX 16 137 138 #define PHYS_AVAIL_SZ 256 /* Allows up to 16GB Ram on pSeries with 139 * logical memory block size of 64MB. 140 * For more Ram increase the lmb or this value. 141 */ 142 143 /* XXX This is non-sensical. Phys avail should hold contiguous regions. */ 144 #define PHYS_AVAIL_ENTRIES PHYS_AVAIL_SZ 145 146 /* 147 * The physical address space is densely populated on 32-bit systems, 148 * but may not be on 64-bit ones. 149 */ 150 #ifdef __powerpc64__ 151 #define VM_PHYSSEG_SPARSE 152 #else 153 #define VM_PHYSSEG_DENSE 154 #endif 155 156 /* 157 * Create two free page pools: VM_FREEPOOL_DEFAULT is the default pool 158 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is 159 * the pool from which physical pages for small UMA objects are 160 * allocated. 161 */ 162 #define VM_NFREEPOOL 2 163 #define VM_FREEPOOL_DEFAULT 0 164 #define VM_FREEPOOL_DIRECT 1 165 166 /* 167 * Create one free page list. 168 */ 169 #define VM_NFREELIST 1 170 #define VM_FREELIST_DEFAULT 0 171 172 /* 173 * The largest allocation size is 4MB. 174 */ 175 #define VM_NFREEORDER 11 176 177 /* 178 * Disable superpage reservations. 179 */ 180 #ifndef VM_NRESERVLEVEL 181 #define VM_NRESERVLEVEL 0 182 #endif 183 184 #ifndef VM_INITIAL_PAGEIN 185 #define VM_INITIAL_PAGEIN 16 186 #endif 187 188 #ifndef SGROWSIZ 189 #define SGROWSIZ (128UL*1024) /* amount to grow stack */ 190 #endif 191 192 /* 193 * How many physical pages per kmem arena virtual page. 194 */ 195 #ifndef VM_KMEM_SIZE_SCALE 196 #define VM_KMEM_SIZE_SCALE (3) 197 #endif 198 199 /* 200 * Optional floor (in bytes) on the size of the kmem arena. 201 */ 202 #ifndef VM_KMEM_SIZE_MIN 203 #define VM_KMEM_SIZE_MIN (12 * 1024 * 1024) 204 #endif 205 206 /* 207 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the 208 * usable KVA space. 209 */ 210 #ifndef VM_KMEM_SIZE_MAX 211 #define VM_KMEM_SIZE_MAX ((VM_MAX_SAFE_KERNEL_ADDRESS - \ 212 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5) 213 #endif 214 215 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ 216 217 /* 218 * On 32-bit OEA, the only purpose for which sf_buf is used is to implement 219 * an opaque pointer required by the machine-independent parts of the kernel. 220 * That pointer references the vm_page that is "mapped" by the sf_buf. The 221 * actual mapping is provided by the direct virtual-to-physical mapping. 222 * 223 * On OEA64 and Book-E, we need to do something a little more complicated. Use 224 * the runtime-detected hw_direct_map to pick between the two cases. Our 225 * friends in vm_machdep.c will do the same to ensure nothing gets confused. 226 */ 227 #define SFBUF 228 #define SFBUF_NOMD 229 230 /* 231 * We (usually) have a direct map of all physical memory, so provide 232 * a macro to use to get the kernel VA address for a given PA. Check the 233 * value of PMAP_HAS_PMAP before using. 234 */ 235 #ifndef LOCORE 236 #ifdef __powerpc64__ 237 #define DMAP_BASE_ADDRESS 0xc000000000000000UL 238 #define DMAP_MAX_ADDRESS 0xcfffffffffffffffUL 239 #else 240 #define DMAP_BASE_ADDRESS 0x00000000UL 241 #define DMAP_MAX_ADDRESS 0xbfffffffUL 242 #endif 243 #endif 244 245 #if defined(__powerpc64__) || defined(BOOKE) 246 /* 247 * powerpc64 and Book-E will provide their own page array allocators. 248 * 249 * On AIM, this will allocate a single virtual array, with pages from the 250 * correct memory domains. 251 * On Book-E this will let us put the array in TLB1, removing the need for TLB 252 * thrashing. 253 * 254 * VM_MIN_KERNEL_ADDRESS is just a dummy. It will get set by the MMU driver. 255 */ 256 #define PA_MIN_ADDRESS VM_MIN_KERNEL_ADDRESS 257 #define PMAP_HAS_PAGE_ARRAY 1 258 #endif 259 260 #define PMAP_HAS_DMAP (hw_direct_map) 261 #define PHYS_TO_DMAP(x) ({ \ 262 KASSERT(hw_direct_map, ("Direct map not provided by PMAP")); \ 263 (x) | DMAP_BASE_ADDRESS; }) 264 #define DMAP_TO_PHYS(x) ({ \ 265 KASSERT(hw_direct_map, ("Direct map not provided by PMAP")); \ 266 (x) &~ DMAP_BASE_ADDRESS; }) 267 268 #endif /* _MACHINE_VMPARAM_H_ */ 269