1 /* $NetBSD: param.h,v 1.1 2006/04/07 14:21:18 cherry Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)param.h 5.8 (Berkeley) 6/28/91 35 */ 36 37 #ifndef _IA64_PARAM_H_ 38 #define _IA64_PARAM_H_ 39 40 /* 41 * Machine dependent constants for Intel Itanium. 42 */ 43 44 #define _MACHINE ia64 45 #define MACHINE "ia64" 46 #define _MACHINE_ARCH ia64 47 #define MACHINE_ARCH "ia64" 48 #define MID_MACHINE MID_IA64 49 50 #ifdef SMP 51 #define MAXCPU 16 52 #else 53 #define MAXCPU 1 54 #endif 55 56 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 57 #define DEV_BSIZE (1<<DEV_BSHIFT) 58 #define BLKDEV_IOSIZE 2048 59 60 #ifndef MAXPHYS 61 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 62 #endif 63 64 #define UPAGES 4 65 #define USPACE (UPAGES * NBPG) /* total size of u-area */ 66 67 #ifndef MSGBUFSIZE 68 #define MSGBUFSIZE NBPG /* default message buffer size */ 69 #endif 70 71 #ifndef KSTACK_PAGES 72 #define KSTACK_PAGES 4 /* pages of kernel stack */ 73 #endif 74 #define KSTACK_GUARD_PAGES 0 /* pages of kstack guard; 0 disables */ 75 76 /* 77 * Round p (pointer or byte index) up to a correctly-aligned value 78 * for all data types (int, long, ...). The result is u_int and 79 * must be cast to any desired pointer type. 80 * 81 * ALIGNED_POINTER is a boolean macro that checks whether an address 82 * is valid to fetch data elements of type t from on this architecture. 83 * This does not reflect the optimal alignment, just the possibility 84 * (within reasonable limits). 85 * 86 */ 87 88 #define ALIGNBYTES 15 89 #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES) 90 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 91 92 #define ALIGNBYTES32 (sizeof(int) - 1) 93 #define ALIGN32(p) (((u_long)(p) + ALIGNBYTES32) &~ALIGNBYTES32) 94 95 #define PGSHIFT 14 /* LOG2(NBPG) */ 96 #define NBPG (1 << PGSHIFT) /* bytes/page */ 97 #define PGOFSET (NBPG-1) /* byte offset into page */ 98 #define NPTEPG (NBPG/(sizeof (pt_entry_t))) 99 /* 100 * Constants related to network buffer management. 101 * MCLBYTES must be no larger than NBPG (the software page size), and, 102 * on machines that exchange pages of input or output buffers with mbuf 103 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 104 * of the hardware page size. 105 */ 106 #define MSIZE 256 /* size of an mbuf */ 107 108 #ifndef MCLSHIFT 109 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 110 /* 2K cluster can hold Ether frame */ 111 #endif /* MCLSHIFT */ 112 113 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 114 115 #ifndef NMBCLUSTERS 116 #if defined(_KERNEL_OPT) 117 #include "opt_gateway.h" 118 #endif 119 120 #ifdef GATEWAY 121 #define NMBCLUSTERS 2048 /* map size, max cluster allocation */ 122 #else 123 #define NMBCLUSTERS 1024 /* map size, max cluster allocation */ 124 #endif 125 #endif 126 127 /* 128 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 129 * logical pages. 130 */ 131 #define NKMEMPAGES_MIN_DEFAULT ((12 * 1024 * 1024) >> PAGE_SHIFT) 132 #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 133 134 /* pages ("clicks") to disk blocks */ 135 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 136 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 137 138 /* pages to bytes */ 139 #define ctob(x) ((x) << PGSHIFT) 140 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 141 142 /* bytes to disk blocks */ 143 #define btodb(x) ((x) >> DEV_BSHIFT) 144 #define dbtob(x) ((x) << DEV_BSHIFT) 145 146 /* 147 * Mach derived conversion macros 148 */ 149 150 #define ia64_round_page(x) ((((unsigned long)(x)) + NBPG - 1) & ~(NBPG - 1)) 151 #define ia64_trunc_page(x) ((unsigned long)(x) & ~(NBPG - 1)) 152 153 #define ia64_btop(x) ((unsigned long)(x) >> PGSHIFT) 154 #define ia64_ptob(x) ((unsigned long)(x) << PGSHIFT) 155 156 #ifdef _KERNEL 157 #ifndef _LOCORE 158 159 #include <machine/intr.h> 160 161 #endif /* _LOCORE */ 162 #endif /* _KERNEL */ 163 164 #endif /* _IA64_PARAM_H_ */ 165