2 * Copyright (c) 2006 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * 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
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $DragonFly: src/sys/platform/vkernel/include/vmparam.h,v 1.5 2007/01/14 00:01:07 dillon Exp $
37 #ifndef _MACHINE_VMPARAM_H_
38 #define _MACHINE_VMPARAM_H_
41 * Indicate that read access also means execution access (XXX newer PCs
42 * have a separate bit).
44 #define VM_PROT_READ_IS_EXEC
47 * Virtual memory related constants, all in bytes
49 #define MAXTSIZ (128UL*1024*1024) /* max text size */
51 #define DFLDSIZ (128UL*1024*1024) /* initial data size limit */
54 #define MAXDSIZ (512UL*1024*1024) /* max data size */
57 #define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */
60 #define MAXSSIZ (64UL*1024*1024) /* max stack size */
63 #define SGROWSIZ (128UL*1024) /* amount to grow stack */
67 * After this period of time allow a process to become swappable. This
68 * parameter is mostly obsolete now.
73 * For virtual kernels running as userland processes the user and kernel
74 * address spaces exist in different VM spaces and can overlap.
76 #define KERNEL_KVA_SIZE 0x40000000
78 #define VM_MIN_USER_ADDRESS 0x00000000
79 #define VM_MAX_USER_ADDRESS 0xBFC00000 /* XXX match to real kernel */
81 #define USRSTACK VM_MAX_USER_ADDRESS
83 #define KERNBASE 0xC0000000 /* XXX totally wrong */
86 * Initial memory map preload
88 #ifndef VM_INITIAL_PAGEIN
89 #define VM_INITIAL_PAGEIN 16
92 #endif /* _MACHINE_VMPARAM_H_ */