Annotation of sys/arch/alpha/include/param.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: param.h,v 1.32 2007/05/28 21:02:49 thib Exp $ */
2: /* $NetBSD: param.h,v 1.30 2000/06/09 16:03:04 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 $Hdr: machparam.h 1.11 89/08/14$
38: *
39: * @(#)param.h 8.1 (Berkeley) 6/10/93
40: */
41:
42: /*
43: * Machine dependent constants for the Alpha.
44: */
45: #define _MACHINE alpha
46: #define MACHINE "alpha"
47: #define _MACHINE_ARCH alpha
48: #define MACHINE_ARCH "alpha"
49: #define MID_MACHINE MID_ALPHA
50:
51: #include <machine/alpha_cpu.h>
52: #include <machine/cpu.h>
53:
54: /*
55: * Round p (pointer or byte index) up to a correctly-aligned value for all
56: * data types (int, long, ...). The result is u_long and must be cast to
57: * any desired pointer type.
58: *
59: * ALIGNED_POINTER is a boolean macro that checks whether an address
60: * is valid to fetch data elements of type t from on this architecture.
61: * This does not reflect the optimal alignment, just the possibility
62: * (within reasonable limits).
63: *
64: */
65: #define ALIGNBYTES 7
66: #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES)
67: #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
68:
69: #define NBPG (1 << ALPHA_PGSHIFT) /* bytes/page */
70: #define PGOFSET (NBPG-1) /* byte off. into pg */
71: #define PGSHIFT ALPHA_PGSHIFT /* LOG2(NBPG) */
72:
73: #define PAGE_SHIFT 13
74: #define PAGE_SIZE (1 << PAGE_SHIFT)
75: #define PAGE_MASK (PAGE_SIZE - 1)
76:
77: #define KERNBASE 0xfffffc0000230000 /* start of kernel virtual */
78:
79: #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
80: #define DEV_BSIZE (1 << DEV_BSHIFT)
81: #define BLKDEV_IOSIZE 2048
82: #ifndef MAXPHYS
83: #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
84: #endif
85:
86: #define UPAGES 2 /* pages of u-area */
87: #define USPACE (UPAGES * NBPG) /* total size of u-area */
88: #define USPACE_ALIGN (0) /* u-area alignment 0-none */
89:
90: #ifndef MSGBUFSIZE
91: #define MSGBUFSIZE NBPG /* default message buffer size */
92: #endif
93:
94: /*
95: * Constants related to network buffer management.
96: */
97: #define NMBCLUSTERS 4096 /* map size, max cluster allocation */
98:
99:
100: /*
101: * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
102: * logical pages.
103: */
104: #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT)
105: #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT)
106:
107: /* pages ("clicks") to disk blocks */
108: #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
109: #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
110:
111: /* pages to bytes */
112: #define ctob(x) ((x) << PGSHIFT)
113: #define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
114:
115: /* bytes to disk blocks */
116: #define btodb(x) ((x) >> DEV_BSHIFT)
117: #define dbtob(x) ((x) << DEV_BSHIFT)
118:
119: #ifdef _KERNEL
120: #ifndef _LOCORE
121:
122: #include <machine/intr.h>
123:
124: void delay(unsigned long);
125: #define DELAY(n) delay(n)
126:
127: /* XXX THE FOLLOWING PROTOTYPE BELONGS IN INTR.H */
128: int spl0(void); /* drop ipl to zero */
129: /* XXX END INTR.H */
130:
131: /* XXX THE FOLLOWING PROTOTYPE SHOULD BE A BUS.H INTERFACE */
132: paddr_t alpha_XXX_dmamap(vaddr_t);
133: /* XXX END BUS.H */
134:
135: #endif
136: #endif /* !_KERNEL */
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