1 /* $OpenBSD: param.h,v 1.11 1998/08/30 22:05:35 millert Exp $ */ 2 3 /*- 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department and Ralph Campbell. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: Utah Hdr: machparam.h 1.11 89/08/14 37 * from: @(#)param.h 8.1 (Berkeley) 6/10/93 38 * JNPR: param.h,v 1.6.2.1 2007/09/10 07:49:36 girish 39 * $FreeBSD$ 40 */ 41 42 #ifndef _MIPS_INCLUDE_PARAM_H_ 43 #define _MIPS_INCLUDE_PARAM_H_ 44 45 #include <machine/_align.h> 46 47 #include <sys/cdefs.h> 48 #ifdef _KERNEL 49 #ifndef _LOCORE 50 #include <machine/cpu.h> 51 #endif 52 #endif 53 54 #define __PCI_REROUTE_INTERRUPT 55 56 #ifndef MACHINE 57 #define MACHINE "mips" 58 #endif 59 #ifndef MACHINE_ARCH 60 #if _BYTE_ORDER == _BIG_ENDIAN 61 #ifdef __mips_n64 62 #define MACHINE_ARCH "mips64" 63 #ifndef MACHINE_ARCH32 64 #define MACHINE_ARCH32 "mips" 65 #endif 66 #elif defined(__mips_n32) 67 #define MACHINE_ARCH "mipsn32" 68 #else 69 #define MACHINE_ARCH "mips" 70 #endif 71 #else 72 #ifdef __mips_n64 73 #define MACHINE_ARCH "mips64el" 74 #ifndef MACHINE_ARCH32 75 #define MACHINE_ARCH32 "mipsel" 76 #endif 77 #elif defined(__mips_n32) 78 #define MACHINE_ARCH "mipsn32el" 79 #else 80 #define MACHINE_ARCH "mipsel" 81 #endif 82 #endif 83 #endif 84 85 /* 86 * OBJFORMAT_NAMES is a comma-separated list of the object formats 87 * that are supported on the architecture. 88 */ 89 #define OBJFORMAT_NAMES "elf" 90 #define OBJFORMAT_DEFAULT "elf" 91 92 #define MID_MACHINE 0 /* None but has to be defined */ 93 94 #ifdef SMP 95 #define MAXSMPCPU 32 96 #ifndef MAXCPU 97 #define MAXCPU MAXSMPCPU 98 #endif 99 #else 100 #define MAXSMPCPU 1 101 #define MAXCPU 1 102 #endif 103 104 /* 105 * Round p (pointer or byte index) up to a correctly-aligned value for all 106 * data types (int, long, ...). The result is u_int and must be cast to 107 * any desired pointer type. 108 */ 109 110 #define ALIGNBYTES _ALIGNBYTES 111 #define ALIGN(p) _ALIGN(p) 112 /* 113 * ALIGNED_POINTER is a boolean macro that checks whether an address 114 * is valid to fetch data elements of type t from on this architecture. 115 * This does not reflect the optimal alignment, just the possibility 116 * (within reasonable limits). 117 */ 118 #define ALIGNED_POINTER(p, t) ((((unsigned long)(p)) & (sizeof (t) - 1)) == 0) 119 120 /* 121 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 122 * architecture. It should be used with appropriate caution. 123 */ 124 #define CACHE_LINE_SHIFT 6 125 #define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 126 127 #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 128 #define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 129 #define PAGE_MASK (PAGE_SIZE-1) 130 131 #define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 132 #define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 133 134 #if defined(__mips_n32) || defined(__mips_n64) /* PHYSADDR_64_BIT */ 135 #define NPTEPGSHIFT 9 /* LOG2(NPTEPG) */ 136 #else 137 #define NPTEPGSHIFT 10 /* LOG2(NPTEPG) */ 138 #endif 139 140 #ifdef __mips_n64 141 #define NPDEPGSHIFT 9 /* LOG2(NPTEPG) */ 142 #define SEGSHIFT (PAGE_SHIFT + NPTEPGSHIFT + NPDEPGSHIFT) 143 #define NBSEG (1ul << SEGSHIFT) 144 #define PDRSHIFT (PAGE_SHIFT + NPTEPGSHIFT) 145 #define PDRMASK ((1 << PDRSHIFT) - 1) 146 #else 147 #define NPDEPGSHIFT 10 /* LOG2(NPTEPG) */ 148 #define SEGSHIFT (PAGE_SHIFT + NPTEPGSHIFT) 149 #define NBSEG (1 << SEGSHIFT) /* bytes/segment */ 150 #define PDRSHIFT SEGSHIFT /* alias for SEG in 32 bit */ 151 #define PDRMASK ((1 << PDRSHIFT) - 1) 152 #endif 153 #define NBPDR (1 << PDRSHIFT) /* bytes/pagedir */ 154 #define SEGMASK (NBSEG - 1) /* byte offset into segment */ 155 156 #define MAXPAGESIZES 1 /* max supported pagesizes */ 157 158 #define MAXDUMPPGS 1 /* xxx: why is this only one? */ 159 160 /* 161 * The kernel stack needs to be aligned on a (PAGE_SIZE * 2) boundary. 162 */ 163 #define KSTACK_PAGES 2 /* kernel stack */ 164 #define KSTACK_GUARD_PAGES 2 /* pages of kstack guard; 0 disables */ 165 166 #define UPAGES 2 167 168 /* pages ("clicks") (4096 bytes) to disk blocks */ 169 #define ctod(x) ((x) << (PAGE_SHIFT - DEV_BSHIFT)) 170 #define dtoc(x) ((x) >> (PAGE_SHIFT - DEV_BSHIFT)) 171 172 /* 173 * Map a ``block device block'' to a file system block. 174 * This should be device dependent, and should use the bsize 175 * field from the disk label. 176 * For now though just use DEV_BSIZE. 177 */ 178 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 179 180 /* 181 * Mach derived conversion macros 182 */ 183 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 184 #define trunc_page(x) ((x) & ~PAGE_MASK) 185 186 #define atop(x) ((x) >> PAGE_SHIFT) 187 #define ptoa(x) ((x) << PAGE_SHIFT) 188 189 #define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 190 191 #endif /* !_MIPS_INCLUDE_PARAM_H_ */ 192