2 * Copyright (c) 1988 University of Utah.
3 * Copyright (c) 1992 The Regents of the University of California.
6 * This code is derived from software contributed to Berkeley by
7 * the Systems Programming Group of the University of Utah Computer
8 * Science Department and Ralph Campbell.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * from: Utah Hdr: machparam.h 1.11 89/08/14
39 * from: @(#)param.h 7.9 (Berkeley) 2/4/93
40 * $Id: param.h.sav,v 1.1 1993/10/12 03:22:42 deraadt Exp $
44 * Machine dependent constants for DEC Station 3100.
46 #define MACHINE "mips"
50 * Round p (pointer or byte index) up to a correctly-aligned value for all
51 * data types (int, long, ...). The result is u_int and must be cast to
52 * any desired pointer type.
55 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
57 #define NBPG 4096 /* bytes/page */
58 #define PGOFSET (NBPG-1) /* byte offset into page */
59 #define PGSHIFT 12 /* LOG2(NBPG) */
60 #define NPTEPG (NBPG/4)
62 #define KERNBASE 0x80000000 /* start of kernel virtual */
63 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
66 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
67 #define BLKDEV_IOSIZE 2048
68 #define MAXPHYS (24 * 1024) /* max raw I/O transfer size */
73 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
74 #define SSIZE 1 /* initial stack size/NBPG */
75 #define SINCR 1 /* increment of stack/NBPG */
77 #define UPAGES 2 /* pages of u-area */
78 #define UADDR 0xffffd000 /* address of u */
79 #define UVPN (UADDR>>PGSHIFT)/* virtual page number of u */
80 #define KERNELSTACK (UADDR+UPAGES*NBPG) /* top of kernel stack */
83 * Constants related to network buffer management.
84 * MCLBYTES must be no larger than CLBYTES (the software page size), and,
85 * on machines that exchange pages of input or output buffers with mbuf
86 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
87 * of the hardware page size.
89 #define MSIZE 128 /* size of an mbuf */
92 #define MCLOFSET (MCLBYTES - 1)
95 #define NMBCLUSTERS 512 /* map size, max cluster allocation */
97 #define NMBCLUSTERS 512 /* map size, max cluster allocation */
102 * Size of kernel malloc arena in CLBYTES-sized logical pages
104 #ifndef NKMEMCLUSTERS
105 #define NKMEMCLUSTERS (512*1024/CLBYTES)
108 /* pages ("clicks") (4096 bytes) to disk blocks */
109 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
110 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
111 #define dtob(x) ((x)<<DEV_BSHIFT)
114 #define ctob(x) ((x)<<PGSHIFT)
117 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)
119 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
120 ((unsigned)(bytes) >> DEV_BSHIFT)
121 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
122 ((unsigned)(db) << DEV_BSHIFT)
125 * Map a ``block device block'' to a file system block.
126 * This should be device dependent, and should use the bsize
127 * field from the disk label.
128 * For now though just use DEV_BSIZE.
130 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
133 * Mach derived conversion macros
135 #define pmax_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
136 #define pmax_trunc_page(x) ((unsigned)(x) & ~(NBPG-1))
137 #define pmax_btop(x) ((unsigned)(x) >> PGSHIFT)
138 #define pmax_ptob(x) ((unsigned)(x) << PGSHIFT)
142 extern int (*Mach_splnet)(), (*Mach_splbio)(), (*Mach_splimp)(),
143 (*Mach_spltty)(), (*Mach_splclock)(), (*Mach_splstatclock)();
144 #define splnet() ((*Mach_splnet)())
145 #define splbio() ((*Mach_splbio)())
146 #define splimp() ((*Mach_splimp)())
147 #define spltty() ((*Mach_spltty)())
148 #define splclock() ((*Mach_splclock)())
149 #define splstatclock() ((*Mach_splstatclock)())
151 #define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); }
155 #define DELAY(n) { register int N = (n); while (--N > 0); }