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 "mips64eb" 63#elif defined(__mips_n32) 64#define MACHINE_ARCH "mipsn32eb" 65#else 66#define MACHINE_ARCH "mipseb" 67#endif 68#else 69#ifdef __mips_n64 70#define MACHINE_ARCH "mips64el" 71#elif defined(__mips_n32) 72#define MACHINE_ARCH "mipsn32el" 73#else 74#define MACHINE_ARCH "mipsel" 75#endif 76#endif 77#endif 78 79/* 80 * OBJFORMAT_NAMES is a comma-separated list of the object formats 81 * that are supported on the architecture. 82 */ 83#define OBJFORMAT_NAMES "elf" 84#define OBJFORMAT_DEFAULT "elf" 85 86#define MID_MACHINE 0 /* None but has to be defined */ 87 88#ifdef SMP 89#define MAXSMPCPU 32 90#ifndef MAXCPU 91#define MAXCPU MAXSMPCPU 92#endif 93#else 94#define MAXSMPCPU 1 95#define MAXCPU 1 96#endif 97 98/* 99 * Round p (pointer or byte index) up to a correctly-aligned value for all 100 * data types (int, long, ...). The result is u_int and must be cast to 101 * any desired pointer type. 102 */ 103 104#define ALIGNBYTES _ALIGNBYTES 105#define ALIGN(p) _ALIGN(p) 106/* 107 * ALIGNED_POINTER is a boolean macro that checks whether an address 108 * is valid to fetch data elements of type t from on this architecture. 109 * This does not reflect the optimal alignment, just the possibility 110 * (within reasonable limits). 111 */ 112#define ALIGNED_POINTER(p, t) ((((unsigned long)(p)) & (sizeof (t) - 1)) == 0) 113 114/* 115 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 116 * architecture. It should be used with appropriate caution. 117 */ 118#define CACHE_LINE_SHIFT 6 119#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 120 121#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 122#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 123#define PAGE_MASK (PAGE_SIZE-1) 124 125#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 126#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 127 128#if defined(__mips_n32) || defined(__mips_n64) /* PHYSADDR_64_BIT */ 129#define NPTEPGSHIFT 9 /* LOG2(NPTEPG) */ 130#else 131#define NPTEPGSHIFT 10 /* LOG2(NPTEPG) */ 132#endif 133 134#ifdef __mips_n64 135#define NPDEPGSHIFT 9 /* LOG2(NPTEPG) */ 136#define SEGSHIFT (PAGE_SHIFT + NPTEPGSHIFT + NPDEPGSHIFT) 137#define NBSEG (1ul << SEGSHIFT) 138#define PDRSHIFT (PAGE_SHIFT + NPTEPGSHIFT) 139#define PDRMASK ((1 << PDRSHIFT) - 1) 140#else 141#define NPDEPGSHIFT 10 /* LOG2(NPTEPG) */ 142#define SEGSHIFT (PAGE_SHIFT + NPTEPGSHIFT) 143#define NBSEG (1 << SEGSHIFT) /* bytes/segment */ 144#define PDRSHIFT SEGSHIFT /* alias for SEG in 32 bit */ 145#define PDRMASK ((1 << PDRSHIFT) - 1) 146#endif 147#define NBPDR (1 << PDRSHIFT) /* bytes/pagedir */ 148#define SEGMASK (NBSEG - 1) /* byte offset into segment */ 149 150#define MAXPAGESIZES 1 /* max supported pagesizes */ 151 152#define BLKDEV_IOSIZE 2048 /* xxx: Why is this 1/2 page? */ 153#define MAXDUMPPGS 1 /* xxx: why is this only one? */ 154 155/* 156 * The kernel stack needs to be aligned on a (PAGE_SIZE * 2) boundary. 157 */ 158#define KSTACK_PAGES 2 /* kernel stack */ 159#define KSTACK_GUARD_PAGES 2 /* pages of kstack guard; 0 disables */ 160 161#define UPAGES 2 162 163/* pages ("clicks") (4096 bytes) to disk blocks */ 164#define ctod(x) ((x) << (PAGE_SHIFT - DEV_BSHIFT)) 165#define dtoc(x) ((x) >> (PAGE_SHIFT - DEV_BSHIFT)) 166 167/* 168 * Map a ``block device block'' to a file system block. 169 * This should be device dependent, and should use the bsize 170 * field from the disk label. 171 * For now though just use DEV_BSIZE. 172 */ 173#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 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#endif /* !_MIPS_INCLUDE_PARAM_H_ */ 187