param.h revision 205072
1178172Simp/* $OpenBSD: param.h,v 1.11 1998/08/30 22:05:35 millert Exp $ */ 2178172Simp 3178172Simp/*- 4178172Simp * Copyright (c) 1988 University of Utah. 5178172Simp * Copyright (c) 1992, 1993 6178172Simp * The Regents of the University of California. All rights reserved. 7178172Simp * 8178172Simp * This code is derived from software contributed to Berkeley by 9178172Simp * the Systems Programming Group of the University of Utah Computer 10178172Simp * Science Department and Ralph Campbell. 11178172Simp * 12178172Simp * Redistribution and use in source and binary forms, with or without 13178172Simp * modification, are permitted provided that the following conditions 14178172Simp * are met: 15178172Simp * 1. Redistributions of source code must retain the above copyright 16178172Simp * notice, this list of conditions and the following disclaimer. 17178172Simp * 2. Redistributions in binary form must reproduce the above copyright 18178172Simp * notice, this list of conditions and the following disclaimer in the 19178172Simp * documentation and/or other materials provided with the distribution. 20178172Simp * 4. Neither the name of the University nor the names of its contributors 21178172Simp * may be used to endorse or promote products derived from this software 22178172Simp * without specific prior written permission. 23178172Simp * 24178172Simp * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25178172Simp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26178172Simp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27178172Simp * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28178172Simp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29178172Simp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30178172Simp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31178172Simp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32178172Simp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33178172Simp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34178172Simp * SUCH DAMAGE. 35178172Simp * 36178172Simp * from: Utah Hdr: machparam.h 1.11 89/08/14 37178172Simp * from: @(#)param.h 8.1 (Berkeley) 6/10/93 38178172Simp * JNPR: param.h,v 1.6.2.1 2007/09/10 07:49:36 girish 39178172Simp * $FreeBSD: head/sys/mips/include/param.h 205072 2010-03-12 07:08:20Z neel $ 40178172Simp */ 41178172Simp 42196994Sphk#ifndef _MIPS_INCLUDE_PARAM_H_ 43196994Sphk#define _MIPS_INCLUDE_PARAM_H_ 44178172Simp 45196994Sphk#include <machine/_align.h> 46196994Sphk 47178172Simp#include <sys/cdefs.h> 48178172Simp#ifdef _KERNEL 49178172Simp#ifdef _LOCORE 50178172Simp#include <machine/psl.h> 51178172Simp#else 52178172Simp#include <machine/cpu.h> 53178172Simp#endif 54178172Simp#endif 55178172Simp 56178172Simp#define __PCI_REROUTE_INTERRUPT 57178172Simp 58178172Simp#ifndef MACHINE 59178172Simp#define MACHINE "mips" 60178172Simp#endif 61178172Simp#ifndef MACHINE_ARCH 62178172Simp#define MACHINE_ARCH "mips" 63178172Simp#endif 64178172Simp 65178172Simp/* 66178172Simp * OBJFORMAT_NAMES is a comma-separated list of the object formats 67178172Simp * that are supported on the architecture. 68178172Simp */ 69178172Simp#define OBJFORMAT_NAMES "elf" 70178172Simp#define OBJFORMAT_DEFAULT "elf" 71178172Simp 72178172Simp#define MID_MACHINE 0 /* None but has to be defined */ 73178172Simp 74178172Simp#ifdef SMP 75178172Simp#define MAXSMPCPU 16 76178172Simp#define MAXCPU MAXSMPCPU 77178172Simp#else 78178172Simp#define MAXSMPCPU 1 79178172Simp#define MAXCPU 1 80178172Simp#endif 81178172Simp 82178172Simp/* 83178172Simp * Round p (pointer or byte index) up to a correctly-aligned value for all 84178172Simp * data types (int, long, ...). The result is u_int and must be cast to 85178172Simp * any desired pointer type. 86178172Simp */ 87178172Simp 88178172Simp#define ALIGNBYTES _ALIGNBYTES 89178172Simp#define ALIGN(p) _ALIGN(p) 90195376Ssam/* 91195376Ssam * ALIGNED_POINTER is a boolean macro that checks whether an address 92195376Ssam * is valid to fetch data elements of type t from on this architecture. 93195376Ssam * This does not reflect the optimal alignment, just the possibility 94195376Ssam * (within reasonable limits). 95195376Ssam */ 96202031Simp#define ALIGNED_POINTER(p, t) ((((unsigned long)(p)) & (sizeof (t) - 1)) == 0) 97178172Simp 98191278Srwatson/* 99191278Srwatson * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 100191278Srwatson * architecture. It should be used with appropriate caution. 101191278Srwatson */ 102191276Srwatson#define CACHE_LINE_SHIFT 6 103191276Srwatson#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 104191276Srwatson 105178172Simp#define NBPG 4096 /* bytes/page */ 106178172Simp#define PGOFSET (NBPG-1) /* byte offset into page */ 107178172Simp#define PGSHIFT 12 /* LOG2(NBPG) */ 108178172Simp 109178172Simp#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 110178172Simp#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 111178172Simp#define PAGE_MASK (PAGE_SIZE-1) 112178172Simp#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 113178172Simp 114178172Simp#define NBSEG 0x400000 /* bytes/segment */ 115178172Simp#define SEGOFSET (NBSEG-1) /* byte offset into segment */ 116178172Simp#define SEGSHIFT 22 /* LOG2(NBSEG) */ 117178172Simp 118197316Salc#define MAXPAGESIZES 1 /* maximum number of supported page sizes */ 119197316Salc 120178172Simp/* XXXimp: This has moved to vmparam.h */ 121178172Simp/* Also, this differs from the mips2 definition, but likely is better */ 122178172Simp/* since this means the kernel won't chew up TLBs when it is executing */ 123178172Simp/* code */ 124178172Simp#define KERNBASE 0x80000000 /* start of kernel virtual */ 125178172Simp#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 126178172Simp 127183441Simp#define BLKDEV_IOSIZE 2048 /* xxx: Why is this 1/2 page? */ 128183441Simp#define MAXDUMPPGS 1 /* xxx: why is this only one? */ 129178172Simp 130178172Simp/* 131205072Sneel * The kernel stack needs to be aligned on a (PAGE_SIZE * 2) boundary. 132205072Sneel * 133205072Sneel * Although we allocate 3 pages for the kernel stack we end up using 134205072Sneel * only the 2 pages that are aligned on a (PAGE_SIZE * 2) boundary. 135178172Simp */ 136178172Simp#define KSTACK_PAGES 3 /* kernel stack*/ 137205072Sneel#define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */ 138178172Simp 139178172Simp#define UPAGES 2 140178172Simp 141178172Simp/* pages ("clicks") (4096 bytes) to disk blocks */ 142178172Simp#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 143178172Simp#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 144178172Simp 145178172Simp/* 146178172Simp * Map a ``block device block'' to a file system block. 147178172Simp * This should be device dependent, and should use the bsize 148178172Simp * field from the disk label. 149178172Simp * For now though just use DEV_BSIZE. 150178172Simp */ 151178172Simp#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 152178172Simp 153178172Simp/* 154178172Simp * Conversion macros 155178172Simp */ 156202031Simp#define mips_round_page(x) ((((unsigned long)(x)) + NBPG - 1) & ~(NBPG-1)) 157202031Simp#define mips_trunc_page(x) ((unsigned long)(x) & ~(NBPG-1)) 158202031Simp#define mips_btop(x) ((unsigned long)(x) >> PGSHIFT) 159202031Simp#define mips_ptob(x) ((unsigned long)(x) << PGSHIFT) 160178172Simp#define round_page mips_round_page 161178172Simp#define trunc_page mips_trunc_page 162178172Simp#define atop(x) ((unsigned long)(x) >> PAGE_SHIFT) 163178172Simp#define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT) 164178172Simp 165178172Simp#define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 166178172Simp 167178172Simp#ifndef _KERNEL 168178172Simp#define DELAY(n) { register int N = (n); while (--N > 0); } 169178172Simp#endif /* !_KERNEL */ 170178172Simp 171196994Sphk#endif /* !_MIPS_INCLUDE_PARAM_H_ */ 172