vmparam.h revision 1.1 1 /* $NetBSD: vmparam.h,v 1.1 2014/09/03 19:34:26 matt 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 _OR1K_VMPARAM_H_
33 #define _OR1K_VMPARAM_H_
34
35 /*
36 * OR1K supports 1 page size: 8KB.
37 */
38
39 #define PAGE_SHIFT 13
40 #define PAGE_SIZE (1 << PAGE_SHIFT)
41 #define PAGE_MASK (PAGE_SIZE - 1)
42
43 #define USPACE 16384
44 #define UPAGES (USPACE >> PAGE_SHIFT)
45
46 /*
47 * USRSTACK is the top (end) of the user stack. The user VA space is a
48 * 32-bit address space starting at 0. Place the stack at its top end.
49 */
50 #define USRSTACK ((vaddr_t) 0x80000000U - PAGE_SIZE)
51
52 #ifndef MAXTSIZ
53 #define MAXTSIZ (1UL << 26) /* 32bit max text size (64MB) */
54 #endif
55
56 #ifndef MAXDSIZ
57 #define MAXDSIZ (1UL << 30) /* max data size (1024MB) */
58 #endif
59
60 #ifndef MAXSSIZ
61 #define MAXSSIZ (1UL << 26) /* max stack size (64MB) */
62 #endif
63
64 #ifndef DFLDSIZ
65 #define DFLDSIZ (1UL << 27) /* 32bit default data size (128MB) */
66 #endif
67
68 #ifndef DFLSSIZ
69 #define DFLSSIZ (1UL << 21) /* 32bit default stack size (2MB) */
70 #endif
71
72 #define VM_MIN_ADDRESS ((vaddr_t) 0x0)
73 #define VM_MAXUSER_ADDRESS ((vaddr_t) 0x80000000 - PAGE_SIZE)
74 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
75
76 /*
77 * Give ourselves 64GB of mappable kernel space. That leaves the rest
78 * to be user for directly mapped (block addressable) addresses.
79 */
80 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) 0x80000000L)
81 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t) -PAGE_SIZE)
82
83 /* virtual sizes (bytes) for various kernel submaps */
84 #define USRIOSIZE (PAGE_SIZE / 8)
85 #define VM_PHYS_SIZE (USRIOSIZE * PAGE_SIZE)
86
87 /* */
88 #define VM_PHYSSEG_MAX 16 /* XXX */
89 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
90
91 #define VM_NFREELIST 1
92 #define VM_FREELIST_DEFAULT 0
93
94 #endif /* _OR1K_VMPARAM_H_ */
95