param.h revision 217354
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: head/sys/mips/include/param.h 217354 2011-01-13 15:17:29Z jchandra $ 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#define MAXCPU MAXSMPCPU 91#else 92#define MAXSMPCPU 1 93#define MAXCPU 1 94#endif 95 96/* 97 * Round p (pointer or byte index) up to a correctly-aligned value for all 98 * data types (int, long, ...). The result is u_int and must be cast to 99 * any desired pointer type. 100 */ 101 102#define ALIGNBYTES _ALIGNBYTES 103#define ALIGN(p) _ALIGN(p) 104/* 105 * ALIGNED_POINTER is a boolean macro that checks whether an address 106 * is valid to fetch data elements of type t from on this architecture. 107 * This does not reflect the optimal alignment, just the possibility 108 * (within reasonable limits). 109 */ 110#define ALIGNED_POINTER(p, t) ((((unsigned long)(p)) & (sizeof (t) - 1)) == 0) 111 112/* 113 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 114 * architecture. It should be used with appropriate caution. 115 */ 116#define CACHE_LINE_SHIFT 6 117#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 118 119#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 120#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 121#define PAGE_MASK (PAGE_SIZE-1) 122 123#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 124#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 125 126#if defined(__mips_n32) || defined(__mips_n64) /* PHYSADDR_64_BIT */ 127#define NPTEPGSHIFT 9 /* LOG2(NPTEPG) */ 128#else 129#define NPTEPGSHIFT 10 /* LOG2(NPTEPG) */ 130#endif 131 132#ifdef __mips_n64 133#define NPDEPGSHIFT 9 /* LOG2(NPTEPG) */ 134#define SEGSHIFT (PAGE_SHIFT + NPTEPGSHIFT + NPDEPGSHIFT) 135#define NBSEG (1ul << SEGSHIFT) 136#define PDRSHIFT (PAGE_SHIFT + NPTEPGSHIFT) 137#define PDRMASK ((1 << PDRSHIFT) - 1) 138#else 139#define NPDEPGSHIFT 10 /* LOG2(NPTEPG) */ 140#define SEGSHIFT (PAGE_SHIFT + NPTEPGSHIFT) 141#define NBSEG (1 << SEGSHIFT) /* bytes/segment */ 142#define PDRSHIFT SEGSHIFT /* alias for SEG in 32 bit */ 143#define PDRMASK ((1 << PDRSHIFT) - 1) 144#endif 145#define NBPDR (1 << PDRSHIFT) /* bytes/pagedir */ 146#define SEGMASK (NBSEG - 1) /* byte offset into segment */ 147 148#define MAXPAGESIZES 1 /* max supported pagesizes */ 149 150#define BLKDEV_IOSIZE 2048 /* xxx: Why is this 1/2 page? */ 151#define MAXDUMPPGS 1 /* xxx: why is this only one? */ 152 153/* 154 * The kernel stack needs to be aligned on a (PAGE_SIZE * 2) boundary. 155 */ 156#define KSTACK_PAGES 2 /* kernel stack */ 157#define KSTACK_GUARD_PAGES 2 /* pages of kstack guard; 0 disables */ 158 159#define UPAGES 2 160 161/* pages ("clicks") (4096 bytes) to disk blocks */ 162#define ctod(x) ((x) << (PAGE_SHIFT - DEV_BSHIFT)) 163#define dtoc(x) ((x) >> (PAGE_SHIFT - DEV_BSHIFT)) 164 165/* 166 * Map a ``block device block'' to a file system block. 167 * This should be device dependent, and should use the bsize 168 * field from the disk label. 169 * For now though just use DEV_BSIZE. 170 */ 171#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 172 173/* 174 * Mach derived conversion macros 175 */ 176#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 177#define trunc_page(x) ((x) & ~PAGE_MASK) 178 179#define atop(x) ((x) >> PAGE_SHIFT) 180#define ptoa(x) ((x) << PAGE_SHIFT) 181 182#define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 183 184#endif /* !_MIPS_INCLUDE_PARAM_H_ */ 185