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 #if _BYTE_ORDER == _BIG_ENDIAN 57 # define _EL_SUFFIX "" 58 #else 59 # define _EL_SUFFIX "el" 60 #endif 61 62 #ifdef __mips_n64 63 # define _N64_SUFFIX "64" 64 #elif defined(__mips_n32) 65 # define _N64_SUFFIX "n32" 66 #else 67 # define _N64_SUFFIX "" 68 #endif 69 70 #ifdef __mips_hard_float 71 # define _HF_SUFFIX "hf" 72 #else 73 # define _HF_SUFFIX "" 74 #endif 75 76 #ifndef MACHINE 77 # define MACHINE "mips" 78 #endif 79 #ifndef MACHINE_ARCH 80 # define MACHINE_ARCH "mips" _N64_SUFFIX _EL_SUFFIX _HF_SUFFIX 81 #endif 82 #ifdef __mips_n64 83 # ifndef MACHINE_ARCH32 84 # define MACHINE_ARCH32 "mips" _EL_SUFFIX _HF_SUFFIX 85 # endif 86 #endif 87 88 /* 89 * OBJFORMAT_NAMES is a comma-separated list of the object formats 90 * that are supported on the architecture. 91 */ 92 #define OBJFORMAT_NAMES "elf" 93 #define OBJFORMAT_DEFAULT "elf" 94 95 #define MID_MACHINE 0 /* None but has to be defined */ 96 97 #ifdef SMP 98 #define MAXSMPCPU 32 99 #ifndef MAXCPU 100 #define MAXCPU MAXSMPCPU 101 #endif 102 #else 103 #define MAXSMPCPU 1 104 #define MAXCPU 1 105 #endif 106 107 #ifndef MAXMEMDOM 108 #define MAXMEMDOM 1 109 #endif 110 111 /* 112 * Round p (pointer or byte index) up to a correctly-aligned value for all 113 * data types (int, long, ...). The result is u_int and must be cast to 114 * any desired pointer type. 115 */ 116 117 #define ALIGNBYTES _ALIGNBYTES 118 #define ALIGN(p) _ALIGN(p) 119 /* 120 * ALIGNED_POINTER is a boolean macro that checks whether an address 121 * is valid to fetch data elements of type t from on this architecture. 122 * This does not reflect the optimal alignment, just the possibility 123 * (within reasonable limits). 124 */ 125 #define ALIGNED_POINTER(p, t) ((((unsigned long)(p)) & (sizeof (t) - 1)) == 0) 126 127 /* 128 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 129 * architecture. It should be used with appropriate caution. 130 */ 131 #define CACHE_LINE_SHIFT 6 132 #define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 133 134 #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 135 #define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 136 #define PAGE_MASK (PAGE_SIZE-1) 137 138 #define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 139 #define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 140 141 #if defined(__mips_n32) || defined(__mips_n64) /* PHYSADDR_64_BIT */ 142 #define NPTEPGSHIFT 9 /* LOG2(NPTEPG) */ 143 #else 144 #define NPTEPGSHIFT 10 /* LOG2(NPTEPG) */ 145 #endif 146 147 #ifdef __mips_n64 148 #define NPDEPGSHIFT 9 /* LOG2(NPTEPG) */ 149 #define SEGSHIFT (PAGE_SHIFT + NPTEPGSHIFT + NPDEPGSHIFT) 150 #define NBSEG (1ul << SEGSHIFT) 151 #define PDRSHIFT (PAGE_SHIFT + NPTEPGSHIFT) 152 #define PDRSIZE (1ul << PDRSHIFT) 153 #define PDRMASK ((1 << PDRSHIFT) - 1) 154 #else 155 #define NPDEPGSHIFT 10 /* LOG2(NPTEPG) */ 156 #define SEGSHIFT (PAGE_SHIFT + NPTEPGSHIFT) 157 #define NBSEG (1 << SEGSHIFT) /* bytes/segment */ 158 #define PDRSHIFT SEGSHIFT /* alias for SEG in 32 bit */ 159 #define PDRSIZE (1ul << PDRSHIFT) 160 #define PDRMASK ((1 << PDRSHIFT) - 1) 161 #endif 162 #define NBPDR (1 << PDRSHIFT) /* bytes/pagedir */ 163 #define SEGMASK (NBSEG - 1) /* byte offset into segment */ 164 165 #define MAXPAGESIZES 1 /* max supported pagesizes */ 166 167 #define MAXDUMPPGS 1 /* xxx: why is this only one? */ 168 169 /* 170 * The kernel stack needs to be aligned on a (PAGE_SIZE * 2) boundary. 171 */ 172 #define KSTACK_PAGES 2 /* kernel stack */ 173 #define KSTACK_GUARD_PAGES 2 /* pages of kstack guard; 0 disables */ 174 175 /* 176 * Mach derived conversion macros 177 */ 178 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 179 #define trunc_page(x) ((x) & ~PAGE_MASK) 180 181 #define atop(x) ((x) >> PAGE_SHIFT) 182 #define ptoa(x) ((x) << PAGE_SHIFT) 183 184 #define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 185 186 #ifdef _KERNEL 187 #define NO_FUEWORD 1 188 #endif 189 190 #endif /* !_MIPS_INCLUDE_PARAM_H_ */ 191