Annotation of sys/arch/alpha/include/vmparam.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: vmparam.h,v 1.14 2005/04/11 15:12:59 deraadt Exp $ */
2: /* $NetBSD: vmparam.h,v 1.18 2000/05/22 17:13:54 thorpej Exp $ */
3:
4: /*
5: * Copyright (c) 1988 University of Utah.
6: * Copyright (c) 1992, 1993
7: * The Regents of the University of California. All rights reserved.
8: *
9: * This code is derived from software contributed to Berkeley by
10: * the Systems Programming Group of the University of Utah Computer
11: * Science Department and Ralph Campbell.
12: *
13: * Redistribution and use in source and binary forms, with or without
14: * modification, are permitted provided that the following conditions
15: * are met:
16: * 1. Redistributions of source code must retain the above copyright
17: * notice, this list of conditions and the following disclaimer.
18: * 2. Redistributions in binary form must reproduce the above copyright
19: * notice, this list of conditions and the following disclaimer in the
20: * documentation and/or other materials provided with the distribution.
21: * 3. Neither the name of the University nor the names of its contributors
22: * may be used to endorse or promote products derived from this software
23: * without specific prior written permission.
24: *
25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35: * SUCH DAMAGE.
36: *
37: * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
38: *
39: * @(#)vmparam.h 8.2 (Berkeley) 4/22/94
40: */
41:
42: #ifndef _ALPHA_VMPARAM_H_
43: #define _ALPHA_VMPARAM_H_
44:
45: /*
46: * Machine dependent constants for Alpha.
47: */
48:
49: /*
50: * USRTEXT is the start of the user text/data space, while USRSTACK
51: * is the top (end) of the user stack. Immediately above the user stack
52: * resides the user structure, which is UPAGES long and contains the
53: * kernel stack.
54: *
55: * Digital UNIX (formerly DEC OSF/1) places the stack below the
56: * text segment (i.e. growing downward from 4G). We may want to
57: * consider doing that at some point, but it might require changes
58: * to the exec code.
59: */
60: #define USRTEXT NBPG
61: #define USRSTACK ((vaddr_t)0x0000000200000000) /* 8G */
62:
63: /*
64: * Virtual memory related constants, all in bytes
65: */
66: #ifndef MAXTSIZ
67: #define MAXTSIZ (1<<30) /* max text size (1G) */
68: #endif
69: #ifndef DFLDSIZ
70: #define DFLDSIZ (1<<27) /* initial data size (128M) */
71: #endif
72: #ifndef MAXDSIZ
73: #define MAXDSIZ (1<<30) /* max data size (1G) */
74: #endif
75: #ifndef DFLSSIZ
76: #define DFLSSIZ (1<<21) /* initial stack size (2M) */
77: #endif
78: #ifndef MAXSSIZ
79: #define MAXSSIZ (1<<25) /* max stack size (32M) */
80: #endif
81:
82: #define STACKGAP_RANDOM 256*1024
83:
84: /*
85: * PTEs for mapping user space into the kernel for phyio operations.
86: * 64 pte's are enough to cover 8 disks * MAXBSIZE.
87: */
88: #ifndef USRIOSIZE
89: #define USRIOSIZE 64
90: #endif
91:
92: /*
93: * PTEs for system V style shared memory.
94: * This is basically slop for kmempt which we actually allocate (malloc) from.
95: */
96: #ifndef SHMMAXPGS
97: #define SHMMAXPGS 4096 /* 32mb */
98: #endif
99:
100: /*
101: * Mach derived constants
102: */
103:
104: /* user/kernel map constants */
105: #define VM_MIN_ADDRESS ((vaddr_t)ALPHA_USEG_BASE) /* 0 */
106: #define VM_MAXUSER_ADDRESS ((vaddr_t)(ALPHA_USEG_END + 1L)) /* 4T */
107: #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
108: #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)ALPHA_K1SEG_BASE)
109: #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)ALPHA_K1SEG_END)
110:
111: /* virtual sizes (bytes) for various kernel submaps */
112: #define VM_PHYS_SIZE (USRIOSIZE*NBPG)
113:
114: /* some Alpha-specific constants */
115: #define VPTBASE ((vaddr_t)0xfffffffc00000000) /* Virt. pg table */
116:
117: #define VM_PHYSSEG_MAX 16 /* XXX */
118: #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
119: #define VM_PHYSSEG_NOADD /* no more after vm_mem_init */
120:
121: #define VM_NFREELIST 1
122: #define VM_FREELIST_DEFAULT 0
123:
124: /*
125: * pmap-specific data stored in the vm_physmem[] array.
126: */
127: #define __HAVE_PMAP_PHYSSEG
128: struct pmap_physseg {
129: struct pv_head *pvhead; /* pv list of this seg */
130: };
131:
132: #endif /* ! _ALPHA_VMPARAM_H_ */
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