2 * SPDX-License-Identifier: BSD-4-Clause
4 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
5 * Copyright (C) 1995, 1996 TooLs GmbH.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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.
33 * $NetBSD: vmparam.h,v 1.11 2000/02/11 19:25:16 thorpej Exp $
37 #ifndef _MACHINE_VMPARAM_H_
38 #define _MACHINE_VMPARAM_H_
41 #include <machine/md_var.h>
44 #define USRSTACK SHAREDPAGE
47 #define MAXTSIZ (1*1024*1024*1024) /* max text size */
51 #define DFLDSIZ (128*1024*1024) /* default data size */
56 #define MAXDSIZ (32UL*1024*1024*1024) /* max data size */
58 #define MAXDSIZ (1*1024*1024*1024) /* max data size */
63 #define DFLSSIZ (8*1024*1024) /* default stack size */
68 #define MAXSSIZ (512*1024*1024) /* max stack size */
70 #define MAXSSIZ (64*1024*1024) /* max stack size */
75 #define VM_MAXUSER_ADDRESS32 ((vm_offset_t)0xfffff000)
77 #define VM_MAXUSER_ADDRESS32 ((vm_offset_t)0x7ffff000)
81 * Would like to have MAX addresses = 0, but this doesn't (currently) work
85 #define VM_MIN_ADDRESS (0x0000000000000000UL)
87 #define VM_MAXUSER_ADDRESS (0xfffffffffffff000UL)
89 #define VM_MAXUSER_ADDRESS (0x7ffffffffffff000UL)
91 #define VM_MAX_ADDRESS (0xffffffffffffffffUL)
93 #define VM_MIN_ADDRESS ((vm_offset_t)0)
94 #define VM_MAXUSER_ADDRESS VM_MAXUSER_ADDRESS32
95 #define VM_MAX_ADDRESS ((vm_offset_t)0xffffffff)
97 #define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE)
100 #define VM_MIN_ADDRESS 0
102 #define VM_MAXUSER_ADDRESS 0x7ffffffffffff000
104 #define VM_MAXUSER_ADDRESS 0x7ffff000
109 #define FREEBSD32_SHAREDPAGE (VM_MAXUSER_ADDRESS32 - PAGE_SIZE)
110 #define FREEBSD32_USRSTACK FREEBSD32_SHAREDPAGE
113 #define VM_MIN_KERNEL_ADDRESS 0xc000000000000000UL
114 #define VM_MAX_KERNEL_ADDRESS 0xc0000001c7ffffffUL
115 #define VM_MAX_SAFE_KERNEL_ADDRESS VM_MAX_KERNEL_ADDRESS
119 #define KERNBASE 0x00100100UL /* start of kernel virtual */
121 #ifndef __powerpc64__
122 #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNEL_SR << ADDR_SR_SHFT)
123 #define VM_MAX_SAFE_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH -1)
124 #define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 3*SEGMENT_LENGTH - 1)
128 * Use the direct-mapped BAT registers for UMA small allocs. This
129 * takes pressure off the small amount of available KVA.
131 #define UMA_MD_SMALL_ALLOC
137 #define KERNBASE 0xc000000000000100UL /* start of kernel virtual */
139 #define KERNBASE 0xc000000000000100 /* start of kernel virtual */
142 #define KERNBASE 0xc0000000 /* start of kernel virtual */
144 #define VM_MIN_KERNEL_ADDRESS KERNBASE
145 #define VM_MAX_KERNEL_ADDRESS 0xffffefff
146 #define VM_MAX_SAFE_KERNEL_ADDRESS VM_MAX_KERNEL_ADDRESS
149 #endif /* AIM/E500 */
152 struct pmap_physseg {
153 struct pv_entry *pvent;
158 #define VM_PHYSSEG_MAX 16 /* 1? */
161 * The physical address space is densely populated on 32-bit systems,
162 * but may not be on 64-bit ones.
165 #define VM_PHYSSEG_SPARSE
167 #define VM_PHYSSEG_DENSE
171 * Create two free page pools: VM_FREEPOOL_DEFAULT is the default pool
172 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is
173 * the pool from which physical pages for small UMA objects are
176 #define VM_NFREEPOOL 2
177 #define VM_FREEPOOL_DEFAULT 0
178 #define VM_FREEPOOL_DIRECT 1
181 * Create one free page list.
183 #define VM_NFREELIST 1
184 #define VM_FREELIST_DEFAULT 0
187 * The largest allocation size is 4MB.
189 #define VM_NFREEORDER 11
192 * Disable superpage reservations.
194 #ifndef VM_NRESERVLEVEL
195 #define VM_NRESERVLEVEL 0
198 #ifndef VM_INITIAL_PAGEIN
199 #define VM_INITIAL_PAGEIN 16
203 #define SGROWSIZ (128UL*1024) /* amount to grow stack */
207 * How many physical pages per kmem arena virtual page.
209 #ifndef VM_KMEM_SIZE_SCALE
210 #define VM_KMEM_SIZE_SCALE (3)
214 * Optional floor (in bytes) on the size of the kmem arena.
216 #ifndef VM_KMEM_SIZE_MIN
217 #define VM_KMEM_SIZE_MIN (12 * 1024 * 1024)
221 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the
224 #ifndef VM_KMEM_SIZE_MAX
225 #define VM_KMEM_SIZE_MAX ((VM_MAX_SAFE_KERNEL_ADDRESS - \
226 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
229 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
232 * On 32-bit OEA, the only purpose for which sf_buf is used is to implement
233 * an opaque pointer required by the machine-independent parts of the kernel.
234 * That pointer references the vm_page that is "mapped" by the sf_buf. The
235 * actual mapping is provided by the direct virtual-to-physical mapping.
237 * On OEA64 and Book-E, we need to do something a little more complicated. Use
238 * the runtime-detected hw_direct_map to pick between the two cases. Our
239 * friends in vm_machdep.c will do the same to ensure nothing gets confused.
245 * We (usually) have a direct map of all physical memory, so provide
246 * a macro to use to get the kernel VA address for a given PA. Returns
247 * 0 if the direct map is unavailable. The location of the direct map
248 * may not be 1:1 in future, so use of the macro is recommended.
251 #define DMAP_BASE_ADDRESS 0x0000000000000000UL
253 #define DMAP_BASE_ADDRESS 0x00000000UL
256 #define PMAP_HAS_DMAP (hw_direct_map)
257 #define PHYS_TO_DMAP(x) ({ \
258 KASSERT(hw_direct_map, ("Direct map not provided by PMAP")); \
259 (x) | DMAP_BASE_ADDRESS; })
260 #define DMAP_TO_PHYS(x) ({ \
261 KASSERT(hw_direct_map, ("Direct map not provided by PMAP")); \
262 (x) &~ DMAP_BASE_ADDRESS; })
264 #endif /* _MACHINE_VMPARAM_H_ */