2 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
3 * Copyright (C) 1995, 1996 TooLs GmbH.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by TooLs GmbH.
17 * 4. The name of TooLs GmbH may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * $NetBSD: vmparam.h,v 1.11 2000/02/11 19:25:16 thorpej Exp $
35 #ifndef _MACHINE_VMPARAM_H_
36 #define _MACHINE_VMPARAM_H_
38 #define USRSTACK SHAREDPAGE
41 #define MAXTSIZ (1*1024*1024*1024) /* max text size */
45 #define DFLDSIZ (128*1024*1024) /* default data size */
49 #define MAXDSIZ (1*1024*1024*1024) /* max data size */
53 #define DFLSSIZ (8*1024*1024) /* default stack size */
57 #define MAXSSIZ (64*1024*1024) /* max stack size */
61 #define VM_MAXUSER_ADDRESS32 ((vm_offset_t)0xfffff000)
63 #define VM_MAXUSER_ADDRESS32 ((vm_offset_t)0x7ffff000)
67 * Would like to have MAX addresses = 0, but this doesn't (currently) work
71 #define VM_MIN_ADDRESS (0x0000000000000000UL)
72 #define VM_MAXUSER_ADDRESS (0xfffffffffffff000UL)
73 #define VM_MAX_ADDRESS (0xffffffffffffffffUL)
75 #define VM_MIN_ADDRESS ((vm_offset_t)0)
76 #define VM_MAXUSER_ADDRESS VM_MAXUSER_ADDRESS32
77 #define VM_MAX_ADDRESS ((vm_offset_t)0xffffffff)
79 #define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE)
81 #if !defined(__powerpc64__) && defined(BOOKE)
82 #define VM_MIN_ADDRESS 0
83 #define VM_MAXUSER_ADDRESS 0x7ffff000
87 #define FREEBSD32_SHAREDPAGE (VM_MAXUSER_ADDRESS32 - PAGE_SIZE)
88 #define FREEBSD32_USRSTACK FREEBSD32_SHAREDPAGE
91 #define KERNBASE 0x00100000UL /* start of kernel virtual */
94 #define VM_MIN_KERNEL_ADDRESS 0xc000000000000000UL
95 #define VM_MAX_KERNEL_ADDRESS 0xc0000001c7ffffffUL
96 #define VM_MAX_SAFE_KERNEL_ADDRESS VM_MAX_KERNEL_ADDRESS
98 #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNEL_SR << ADDR_SR_SHFT)
99 #define VM_MAX_SAFE_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH -1)
100 #define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 3*SEGMENT_LENGTH - 1)
104 * Use the direct-mapped BAT registers for UMA small allocs. This
105 * takes pressure off the small amount of available KVA.
107 #define UMA_MD_SMALL_ALLOC
111 #define KERNBASE 0xc0000000 /* start of kernel virtual */
113 #define VM_MIN_KERNEL_ADDRESS KERNBASE
114 #define VM_MAX_KERNEL_ADDRESS 0xffffffff
115 #define VM_MAX_SAFE_KERNEL_ADDRESS VM_MAX_KERNEL_ADDRESS
117 #endif /* AIM/E500 */
120 struct pmap_physseg {
121 struct pv_entry *pvent;
126 #define VM_PHYSSEG_MAX 16 /* 1? */
129 * The physical address space is densely populated on 32-bit systems,
130 * but may not be on 64-bit ones.
133 #define VM_PHYSSEG_SPARSE
135 #define VM_PHYSSEG_DENSE
139 * Create two free page pools: VM_FREEPOOL_DEFAULT is the default pool
140 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is
141 * the pool from which physical pages for small UMA objects are
144 #define VM_NFREEPOOL 2
145 #define VM_FREEPOOL_DEFAULT 0
146 #define VM_FREEPOOL_DIRECT 1
149 * Create one free page list.
151 #define VM_NFREELIST 1
152 #define VM_FREELIST_DEFAULT 0
155 * The largest allocation size is 4MB.
157 #define VM_NFREEORDER 11
160 * Disable superpage reservations.
162 #ifndef VM_NRESERVLEVEL
163 #define VM_NRESERVLEVEL 0
166 #ifndef VM_INITIAL_PAGEIN
167 #define VM_INITIAL_PAGEIN 16
171 #define SGROWSIZ (128UL*1024) /* amount to grow stack */
175 * How many physical pages per kmem arena virtual page.
177 #ifndef VM_KMEM_SIZE_SCALE
178 #define VM_KMEM_SIZE_SCALE (3)
182 * Optional floor (in bytes) on the size of the kmem arena.
184 #ifndef VM_KMEM_SIZE_MIN
185 #define VM_KMEM_SIZE_MIN (12 * 1024 * 1024)
189 * Optional ceiling (in bytes) on the size of the kmem arena: 40% of the
192 #ifndef VM_KMEM_SIZE_MAX
193 #define VM_KMEM_SIZE_MAX ((VM_MAX_SAFE_KERNEL_ADDRESS - \
194 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
197 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
200 * On 32-bit OEA, the only purpose for which sf_buf is used is to implement
201 * an opaque pointer required by the machine-independent parts of the kernel.
202 * That pointer references the vm_page that is "mapped" by the sf_buf. The
203 * actual mapping is provided by the direct virtual-to-physical mapping.
205 * On OEA64 and Book-E, we need to do something a little more complicated. Use
206 * the runtime-detected hw_direct_map to pick between the two cases. Our
207 * friends in vm_machdep.c will do the same to ensure nothing gets confused.
211 #define SFBUF_OPTIONAL_DIRECT_MAP hw_direct_map
212 #define SFBUF_PHYS_DMAP(x) (x)
214 #endif /* _MACHINE_VMPARAM_H_ */