param.h revision 191278
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 191278 2009-04-19 21:26:36Z rwatson $ 40178172Simp */ 41178172Simp 42178172Simp#ifndef _MACHINE_PARAM_H_ 43178172Simp#define _MACHINE_PARAM_H_ 44178172Simp 45178172Simp#include <sys/cdefs.h> 46178172Simp#ifdef _KERNEL 47178172Simp#ifdef _LOCORE 48178172Simp#include <machine/psl.h> 49178172Simp#else 50178172Simp#include <machine/cpu.h> 51178172Simp#endif 52178172Simp#endif 53178172Simp 54178172Simp#define __PCI_REROUTE_INTERRUPT 55178172Simp 56178172Simp#ifndef MACHINE 57178172Simp#define MACHINE "mips" 58178172Simp#endif 59178172Simp#ifndef MACHINE_ARCH 60178172Simp#define MACHINE_ARCH "mips" 61178172Simp#endif 62178172Simp 63178172Simp/* 64178172Simp * OBJFORMAT_NAMES is a comma-separated list of the object formats 65178172Simp * that are supported on the architecture. 66178172Simp */ 67178172Simp#define OBJFORMAT_NAMES "elf" 68178172Simp#define OBJFORMAT_DEFAULT "elf" 69178172Simp 70178172Simp#define MID_MACHINE 0 /* None but has to be defined */ 71178172Simp 72178172Simp#ifdef SMP 73178172Simp#define MAXSMPCPU 16 74178172Simp#define MAXCPU MAXSMPCPU 75178172Simp#else 76178172Simp#define MAXSMPCPU 1 77178172Simp#define MAXCPU 1 78178172Simp#endif 79178172Simp 80178172Simp/* 81178172Simp * Round p (pointer or byte index) up to a correctly-aligned value for all 82178172Simp * data types (int, long, ...). The result is u_int and must be cast to 83178172Simp * any desired pointer type. 84178172Simp */ 85178172Simp#define _ALIGNBYTES 7 86178172Simp#define _ALIGN(p) (((u_int)(p) + _ALIGNBYTES) &~ _ALIGNBYTES) 87178172Simp#define ALIGNED_POINTER(p, t) ((((u_int32_t)(p)) & (sizeof (t) - 1)) == 0) 88178172Simp 89178172Simp#define ALIGNBYTES _ALIGNBYTES 90178172Simp#define ALIGN(p) _ALIGN(p) 91178172Simp 92191278Srwatson/* 93191278Srwatson * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 94191278Srwatson * architecture. It should be used with appropriate caution. 95191278Srwatson */ 96191276Srwatson#ifndef CACHE_LINE_SHIFT 97191276Srwatson#define CACHE_LINE_SHIFT 6 98191276Srwatson#endif 99191276Srwatson#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 100191276Srwatson 101178172Simp#define NBPG 4096 /* bytes/page */ 102178172Simp#define PGOFSET (NBPG-1) /* byte offset into page */ 103178172Simp#define PGSHIFT 12 /* LOG2(NBPG) */ 104178172Simp 105178172Simp#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 106178172Simp#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 107178172Simp#define PAGE_MASK (PAGE_SIZE-1) 108178172Simp#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 109178172Simp 110178172Simp#define NBSEG 0x400000 /* bytes/segment */ 111178172Simp#define SEGOFSET (NBSEG-1) /* byte offset into segment */ 112178172Simp#define SEGSHIFT 22 /* LOG2(NBSEG) */ 113178172Simp 114178172Simp/* XXXimp: This has moved to vmparam.h */ 115178172Simp/* Also, this differs from the mips2 definition, but likely is better */ 116178172Simp/* since this means the kernel won't chew up TLBs when it is executing */ 117178172Simp/* code */ 118178172Simp#define KERNBASE 0x80000000 /* start of kernel virtual */ 119178172Simp#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 120178172Simp 121183441Simp#define BLKDEV_IOSIZE 2048 /* xxx: Why is this 1/2 page? */ 122183441Simp#define MAXDUMPPGS 1 /* xxx: why is this only one? */ 123178172Simp 124178172Simp/* 125178172Simp * NOTE: In FreeBSD, Uarea's don't have a fixed address. 126178172Simp * Therefore, any code imported from OpenBSD which depends on 127178172Simp * UADDR, UVPN and KERNELSTACK requires porting. 128183441Simp * XXX: 3 stack pages? Not 4 which would be more efficient from a tlb 129183441Simp * XXX: point of view. 130178172Simp */ 131178172Simp#define KSTACK_PAGES 3 /* kernel stack*/ 132178172Simp#define KSTACK_GUARD_PAGES 0 /* pages of kstack guard; 0 disables */ 133178172Simp 134178172Simp#define UPAGES 2 135178172Simp 136178172Simp/* pages ("clicks") (4096 bytes) to disk blocks */ 137178172Simp#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 138178172Simp#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 139178172Simp 140178172Simp/* 141178172Simp * Map a ``block device block'' to a file system block. 142178172Simp * This should be device dependent, and should use the bsize 143178172Simp * field from the disk label. 144178172Simp * For now though just use DEV_BSIZE. 145178172Simp */ 146178172Simp#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 147178172Simp 148178172Simp/* 149178172Simp * Conversion macros 150178172Simp */ 151178172Simp#define mips_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 152178172Simp#define mips_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 153178172Simp#define mips_btop(x) ((unsigned)(x) >> PGSHIFT) 154178172Simp#define mips_ptob(x) ((unsigned)(x) << PGSHIFT) 155178172Simp#define round_page mips_round_page 156178172Simp#define trunc_page mips_trunc_page 157178172Simp#define atop(x) ((unsigned long)(x) >> PAGE_SHIFT) 158178172Simp#define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT) 159178172Simp 160178172Simp#define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 161178172Simp 162178172Simp#ifndef _KERNEL 163178172Simp#define DELAY(n) { register int N = (n); while (--N > 0); } 164178172Simp#endif /* !_KERNEL */ 165178172Simp 166178172Simp#endif /* !_MACHINE_PARAM_H_ */ 167