master
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 */
35
36#ifndef _MACHINE_VMPARAM_H_
37#define _MACHINE_VMPARAM_H_
38
39#ifndef LOCORE
40#include <machine/md_var.h>
41#endif
42
43#define USRSTACK SHAREDPAGE
44
45#ifndef MAXTSIZ
46#define MAXTSIZ (1*1024*1024*1024) /* max text size */
47#endif
48
49#ifndef DFLDSIZ
50#define DFLDSIZ (128*1024*1024) /* default data size */
51#endif
52
53#ifndef MAXDSIZ
54#ifdef __powerpc64__
55#define MAXDSIZ (32UL*1024*1024*1024) /* max data size */
56#else
57#define MAXDSIZ (1*1024*1024*1024) /* max data size */
58#endif
59#endif
60
61#ifndef DFLSSIZ
62#define DFLSSIZ (8*1024*1024) /* default stack size */
63#endif
64
65#ifndef MAXSSIZ
66#ifdef __powerpc64__
67#define MAXSSIZ (512*1024*1024) /* max stack size */
68#else
69#define MAXSSIZ (64*1024*1024) /* max stack size */
70#endif
71#endif
72
73#ifdef AIM
74#define VM_MAXUSER_ADDRESS32 0xfffff000
75#else
76#define VM_MAXUSER_ADDRESS32 0x7ffff000
77#endif
78
79/*
80 * Would like to have MAX addresses = 0, but this doesn't (currently) work
81 */
82#ifdef __powerpc64__
83/*
84 * Virtual addresses of things. Derived from the page directory and
85 * page table indexes from pmap.h for precision.
86 *
87 * kernel map should be able to start at 0xc008000000000000 -
88 * but at least the functional simulator doesn't like it
89 *
90 * 0x0000000000000000 - 0x000fffffffffffff user map
91 * 0xc000000000000000 - 0xc007ffffffffffff direct map
92 * 0xc008000000000000 - 0xc00fffffffffffff kernel map
93 *
94 */
95#define VM_MIN_ADDRESS 0x0000000000000000
96#define VM_MAXUSER_ADDRESS 0x000fffffc0000000
97#define VM_MAX_ADDRESS 0xc00fffffffffffff
98#define VM_MIN_KERNEL_ADDRESS 0xc008000000000000
99#define VM_MAX_KERNEL_ADDRESS 0xc0080007ffffffff
100#define VM_MAX_SAFE_KERNEL_ADDRESS VM_MAX_KERNEL_ADDRESS
101#else
102#define VM_MIN_ADDRESS 0
103#define VM_MAXUSER_ADDRESS VM_MAXUSER_ADDRESS32
104#define VM_MAX_ADDRESS 0xffffffff
105#endif
106
107#define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE)
108
109#define FREEBSD32_SHAREDPAGE (VM_MAXUSER_ADDRESS32 - PAGE_SIZE)
110#define FREEBSD32_USRSTACK FREEBSD32_SHAREDPAGE
111
112#define KERNBASE 0x00100100 /* start of kernel virtual */
113
114#ifdef AIM
115#ifndef __powerpc64__
116#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNEL_SR << ADDR_SR_SHFT)
117#define VM_MAX_SAFE_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH -1)
118#define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 3*SEGMENT_LENGTH - 1)
119#endif
120
121/*
122 * Use the direct-mapped BAT registers for UMA small allocs. This
123 * takes pressure off the small amount of available KVA.
124 */
125#define UMA_MD_SMALL_ALLOC
126
127#else /* Book-E */
128
129/* Use the direct map for UMA small allocs on powerpc64. */
130#ifdef __powerpc64__
131#define UMA_MD_SMALL_ALLOC
132#else
133#define VM_MIN_KERNEL_ADDRESS 0xc0000000
134#define VM_MAX_KERNEL_ADDRESS 0xffffefff
135#define VM_MAX_SAFE_KERNEL_ADDRESS VM_MAX_KERNEL_ADDRESS
136#endif
137
138#endif /* AIM/E500 */
139
140#if !defined(LOCORE)
141struct pmap_physseg {
142 struct pv_entry *pvent;
143 char *attrs;
144};
145#endif
146
147#ifdef __powerpc64__
148#define VM_PHYSSEG_MAX 63 /* 1? */
149#else
150#define VM_PHYSSEG_MAX 16 /* 1? */
151#endif
152
153#define PHYS_AVAIL_SZ 256 /* Allows up to 16GB Ram on pSeries with
154 * logical memory block size of 64MB.
155 * For more Ram increase the lmb or this value.
156 */
157
158/* XXX This is non-sensical. Phys avail should hold contiguous regions. */
159#define PHYS_AVAIL_ENTRIES PHYS_AVAIL_SZ
160
161/*
162 * The physical address space is densely populated on 32-bit systems,
163 * but may not be on 64-bit ones.
164 */
165#ifdef __powerpc64__
166#define VM_PHYSSEG_SPARSE
167#else
168#define VM_PHYSSEG_DENSE
169#endif
170
171/*
172 * Create two free page pools: VM_FREEPOOL_DEFAULT is the default pool
173 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is
174 * the pool from which physical pages for small UMA objects are
175 * allocated.
176 */
177#define VM_NFREEPOOL 2
178#define VM_FREEPOOL_DEFAULT 0
179#define VM_FREEPOOL_DIRECT 1
180
181/*
182 * Create one free page list.
183 */
184#define VM_NFREELIST 1
185#define VM_FREELIST_DEFAULT 0
186
187#ifdef __powerpc64__
188/* The largest allocation size is 16MB. */
189#define VM_NFREEORDER 13
190#else
191/* The largest allocation size is 4MB. */
192#define VM_NFREEORDER 11
193#endif
194
195#ifndef VM_NRESERVLEVEL
196#ifdef __powerpc64__
197/* Enable superpage reservations: 1 level. */
198#define VM_NRESERVLEVEL 1
199#else
200/* Disable superpage reservations. */
201#define VM_NRESERVLEVEL 0
202#endif
203#endif
204
205#ifndef VM_LEVEL_0_ORDER
206/* Level 0 reservations consist of 512 (RPT) or 4096 (HPT) pages. */
207#define VM_LEVEL_0_ORDER vm_level_0_order
208#ifndef __ASSEMBLER__
209extern int vm_level_0_order;
210#endif
211#endif
212
213#ifndef VM_LEVEL_0_ORDER_MAX
214#define VM_LEVEL_0_ORDER_MAX 12
215#endif
216
217#ifdef __powerpc64__
218#ifdef SMP
219#define PA_LOCK_COUNT 256
220#endif
221#endif
222
223#ifndef VM_INITIAL_PAGEIN
224#define VM_INITIAL_PAGEIN 16
225#endif
226
227#ifndef SGROWSIZ
228#define SGROWSIZ (128UL*1024) /* amount to grow stack */
229#endif
230
231/*
232 * How many physical pages per kmem arena virtual page.
233 */
234#ifndef VM_KMEM_SIZE_SCALE
235#define VM_KMEM_SIZE_SCALE (3)
236#endif
237
238/*
239 * Optional floor (in bytes) on the size of the kmem arena.
240 */
241#ifndef VM_KMEM_SIZE_MIN
242#define VM_KMEM_SIZE_MIN (12 * 1024 * 1024)
243#endif
244
245/*
246 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the
247 * usable KVA space.
248 */
249#ifndef VM_KMEM_SIZE_MAX
250#define VM_KMEM_SIZE_MAX ((VM_MAX_SAFE_KERNEL_ADDRESS - \
251 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
252#endif
253
254#ifdef __powerpc64__
255#define ZERO_REGION_SIZE (2 * 1024 * 1024) /* 2MB */
256#else
257#define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
258#endif
259
260/*
261 * On 32-bit OEA, the only purpose for which sf_buf is used is to implement
262 * an opaque pointer required by the machine-independent parts of the kernel.
263 * That pointer references the vm_page that is "mapped" by the sf_buf. The
264 * actual mapping is provided by the direct virtual-to-physical mapping.
265 *
266 * On OEA64 and Book-E, we need to do something a little more complicated. Use
267 * the runtime-detected hw_direct_map to pick between the two cases. Our
268 * friends in vm_machdep.c will do the same to ensure nothing gets confused.
269 */
270#define SFBUF
271#define SFBUF_NOMD
272
273/*
274 * We (usually) have a direct map of all physical memory, so provide
275 * a macro to use to get the kernel VA address for a given PA. Check the
276 * value of PMAP_HAS_PMAP before using.
277 */
278#ifndef LOCORE
279#ifdef __powerpc64__
280#define DMAP_BASE_ADDRESS 0xc000000000000000UL
281#define DMAP_MIN_ADDRESS DMAP_BASE_ADDRESS
282#define DMAP_MAX_ADDRESS 0xc007ffffffffffffUL
283#else
284#define DMAP_BASE_ADDRESS 0x00000000UL
285#define DMAP_MAX_ADDRESS 0xbfffffffUL
286#endif
287#endif
288
289#if defined(__powerpc64__) || defined(BOOKE)
290/*
291 * powerpc64 and Book-E will provide their own page array allocators.
292 *
293 * On AIM, this will allocate a single virtual array, with pages from the
294 * correct memory domains.
295 * On Book-E this will let us put the array in TLB1, removing the need for TLB
296 * thrashing.
297 *
298 * VM_MIN_KERNEL_ADDRESS is just a dummy. It will get set by the MMU driver.
299 */
300#define PA_MIN_ADDRESS VM_MIN_KERNEL_ADDRESS
301#define PMAP_HAS_PAGE_ARRAY 1
302#endif
303
304#if defined(__powerpc64__)
305/*
306 * Need a page dump array for minidump.
307 */
308#define MINIDUMP_PAGE_TRACKING 1
309#else
310/*
311 * No minidump with 32-bit powerpc.
312 */
313#define MINIDUMP_PAGE_TRACKING 0
314#endif
315
316#define PMAP_HAS_DMAP (hw_direct_map)
317#define PHYS_TO_DMAP(x) ({ \
318 KASSERT(hw_direct_map, ("Direct map not provided by PMAP")); \
319 (x) | DMAP_BASE_ADDRESS; })
320#define DMAP_TO_PHYS(x) ({ \
321 KASSERT(hw_direct_map, ("Direct map not provided by PMAP")); \
322 (x) &~ DMAP_BASE_ADDRESS; })
323
324/*
325 * No non-transparent large page support in the pmap.
326 */
327#define PMAP_HAS_LARGEPAGES 0
328
329#endif /* _MACHINE_VMPARAM_H_ */