param.h revision 197316
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 197316 2009-09-18 17:04:57Z alc $ 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#ifdef _LOCORE 50#include <machine/psl.h> 51#else 52#include <machine/cpu.h> 53#endif 54#endif 55 56#define __PCI_REROUTE_INTERRUPT 57 58#ifndef MACHINE 59#define MACHINE "mips" 60#endif 61#ifndef MACHINE_ARCH 62#define MACHINE_ARCH "mips" 63#endif 64 65/* 66 * OBJFORMAT_NAMES is a comma-separated list of the object formats 67 * that are supported on the architecture. 68 */ 69#define OBJFORMAT_NAMES "elf" 70#define OBJFORMAT_DEFAULT "elf" 71 72#define MID_MACHINE 0 /* None but has to be defined */ 73 74#ifdef SMP 75#define MAXSMPCPU 16 76#define MAXCPU MAXSMPCPU 77#else 78#define MAXSMPCPU 1 79#define MAXCPU 1 80#endif 81 82/* 83 * Round p (pointer or byte index) up to a correctly-aligned value for all 84 * data types (int, long, ...). The result is u_int and must be cast to 85 * any desired pointer type. 86 */ 87 88#define ALIGNBYTES _ALIGNBYTES 89#define ALIGN(p) _ALIGN(p) 90/* 91 * ALIGNED_POINTER is a boolean macro that checks whether an address 92 * is valid to fetch data elements of type t from on this architecture. 93 * This does not reflect the optimal alignment, just the possibility 94 * (within reasonable limits). 95 */ 96#define ALIGNED_POINTER(p, t) ((((unsigned)(p)) & (sizeof (t) - 1)) == 0) 97 98/* 99 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 100 * architecture. It should be used with appropriate caution. 101 */ 102#define CACHE_LINE_SHIFT 6 103#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 104 105#define NBPG 4096 /* bytes/page */ 106#define PGOFSET (NBPG-1) /* byte offset into page */ 107#define PGSHIFT 12 /* LOG2(NBPG) */ 108 109#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 110#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 111#define PAGE_MASK (PAGE_SIZE-1) 112#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 113 114#define NBSEG 0x400000 /* bytes/segment */ 115#define SEGOFSET (NBSEG-1) /* byte offset into segment */ 116#define SEGSHIFT 22 /* LOG2(NBSEG) */ 117 118#define MAXPAGESIZES 1 /* maximum number of supported page sizes */ 119 120/* XXXimp: This has moved to vmparam.h */ 121/* Also, this differs from the mips2 definition, but likely is better */ 122/* since this means the kernel won't chew up TLBs when it is executing */ 123/* code */ 124#define KERNBASE 0x80000000 /* start of kernel virtual */ 125#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 126 127#define BLKDEV_IOSIZE 2048 /* xxx: Why is this 1/2 page? */ 128#define MAXDUMPPGS 1 /* xxx: why is this only one? */ 129 130/* 131 * NOTE: In FreeBSD, Uarea's don't have a fixed address. 132 * Therefore, any code imported from OpenBSD which depends on 133 * UADDR, UVPN and KERNELSTACK requires porting. 134 * XXX: 3 stack pages? Not 4 which would be more efficient from a tlb 135 * XXX: point of view. 136 */ 137#define KSTACK_PAGES 3 /* kernel stack*/ 138#define KSTACK_GUARD_PAGES 0 /* pages of kstack guard; 0 disables */ 139 140#define UPAGES 2 141 142/* pages ("clicks") (4096 bytes) to disk blocks */ 143#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 144#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 145 146/* 147 * Map a ``block device block'' to a file system block. 148 * This should be device dependent, and should use the bsize 149 * field from the disk label. 150 * For now though just use DEV_BSIZE. 151 */ 152#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 153 154/* 155 * Conversion macros 156 */ 157#define mips_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 158#define mips_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 159#define mips_btop(x) ((unsigned)(x) >> PGSHIFT) 160#define mips_ptob(x) ((unsigned)(x) << PGSHIFT) 161#define round_page mips_round_page 162#define trunc_page mips_trunc_page 163#define atop(x) ((unsigned long)(x) >> PAGE_SHIFT) 164#define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT) 165 166#define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 167 168#ifndef _KERNEL 169#define DELAY(n) { register int N = (n); while (--N > 0); } 170#endif /* !_KERNEL */ 171 172#endif /* !_MIPS_INCLUDE_PARAM_H_ */ 173