Annotation of sys/arch/hppa/include/param.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: param.h,v 1.36 2007/07/15 19:25:49 kettenis Exp $ */
2:
3: /*
4: * Copyright (c) 1988-1994, The University of Utah and
5: * the Computer Systems Laboratory at the University of Utah (CSL).
6: * All rights reserved.
7: *
8: * Permission to use, copy, modify and distribute this software is hereby
9: * granted provided that (1) source code retains these copyright, permission,
10: * and disclaimer notices, and (2) redistributions including binaries
11: * reproduce the notices in supporting documentation, and (3) all advertising
12: * materials mentioning features or use of this software display the following
13: * acknowledgement: ``This product includes software developed by the
14: * Computer Systems Laboratory at the University of Utah.''
15: *
16: * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
17: * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
18: * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
19: *
20: * CSL requests users of this software to return to csl-dist@cs.utah.edu any
21: * improvements that they make and grant CSL redistribution rights.
22: *
23: * Utah $Hdr: param.h 1.18 94/12/16$
24: */
25:
26: #include <machine/cpu.h>
27: #include <machine/intr.h>
28:
29: /*
30: * Machine dependent constants for PA-RISC.
31: */
32:
33: #define _MACHINE hppa
34: #define MACHINE "hppa"
35: #define _MACHINE_ARCH hppa
36: #define MACHINE_ARCH "hppa"
37: #define MID_MACHINE MID_HPUX800
38:
39: /*
40: * Round p (pointer or byte index) up to a correctly-aligned value for all
41: * data types (int, long, ...). The result is u_int and must be cast to
42: * any desired pointer type.
43: */
44: #define ALIGNBYTES 7
45: #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES)
46: #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t) - 1)) == 0)
47:
48: #define PAGE_SIZE 4096
49: #define PAGE_MASK (PAGE_SIZE-1)
50: #define PAGE_SHIFT 12
51:
52: #define NBPG 4096 /* bytes/page */
53: #define PGOFSET (NBPG-1) /* byte offset into page */
54: #define PGSHIFT 12 /* LOG2(NBPG) */
55:
56: #define KERNBASE 0x00000000 /* start of kernel virtual */
57:
58: #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
59: #define DEV_BSIZE (1 << DEV_BSHIFT)
60: #define BLKDEV_IOSIZE 2048
61: #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
62:
63: #define MACHINE_STACK_GROWS_UP 1 /* stack grows to higher addresses */
64:
65: #define USPACE (4 * NBPG) /* pages for user struct and kstack */
66: #define USPACE_ALIGN (0) /* u-area alignment 0-none */
67:
68: #ifndef MSGBUFSIZE
69: #define MSGBUFSIZE 2*NBPG /* default message buffer size */
70: #endif
71:
72: /*
73: * Constants related to network buffer management.
74: * MCLBYTES must be no larger than the software page size, and,
75: * on machines that exchange pages of input or output buffers with mbuf
76: * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
77: * of the hardware page size.
78: */
79: #define MSIZE 256 /* size of an mbuf */
80: #define MCLSHIFT 11
81: #define MCLBYTES (1 << MCLSHIFT) /* large enough for ether MTU */
82: #define MCLOFSET (MCLBYTES - 1)
83: #define NMBCLUSTERS 4096 /* map size, max cluster allocation */
84:
85: /*
86: * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
87: * logical pages.
88: */
89: #define NKMEMPAGES_MIN_DEFAULT ((4 * 1024 * 1024) >> PAGE_SHIFT)
90: #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT)
91:
92: /* pages ("clicks") (4096 bytes) to disk blocks */
93: #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
94: #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
95:
96: /* pages to bytes */
97: #define ctob(x) ((x) << PGSHIFT)
98: #define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
99:
100: #define btodb(x) ((x) >> DEV_BSHIFT)
101: #define dbtob(x) ((x) << DEV_BSHIFT)
102:
103: #ifdef _KERNEL
104: #ifdef COMPAT_HPUX
105: /*
106: * Constants/macros for HPUX multiple mapping of user address space.
107: * Pages in the first 256Mb are mapped in at every 256Mb segment.
108: */
109: #define HPMMMASK 0xF0000000
110: #define ISHPMMADDR(v) 0 /* XXX ...jef */
111: #define HPMMBASEADDR(v) ((unsigned)(v) & ~HPMMMASK)
112: #endif
113: #endif
114:
115: #define __SWAP_BROKEN
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