param.h revision 205072
1139749Simp/* $OpenBSD: param.h,v 1.11 1998/08/30 22:05:35 millert Exp $ */ 265832Snyan 365832Snyan/*- 465832Snyan * Copyright (c) 1988 University of Utah. 565832Snyan * Copyright (c) 1992, 1993 665832Snyan * The Regents of the University of California. All rights reserved. 765832Snyan * 865832Snyan * This code is derived from software contributed to Berkeley by 965832Snyan * the Systems Programming Group of the University of Utah Computer 1065832Snyan * Science Department and Ralph Campbell. 1165832Snyan * 1265832Snyan * Redistribution and use in source and binary forms, with or without 1365832Snyan * modification, are permitted provided that the following conditions 1465832Snyan * are met: 1565832Snyan * 1. Redistributions of source code must retain the above copyright 1665832Snyan * notice, this list of conditions and the following disclaimer. 1765832Snyan * 2. Redistributions in binary form must reproduce the above copyright 1865832Snyan * notice, this list of conditions and the following disclaimer in the 1965832Snyan * documentation and/or other materials provided with the distribution. 2065832Snyan * 4. Neither the name of the University nor the names of its contributors 2165832Snyan * may be used to endorse or promote products derived from this software 2265832Snyan * without specific prior written permission. 2365832Snyan * 24119418Sobrien * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25119418Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26119418Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2765832Snyan * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2865832Snyan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2965832Snyan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3067158Sphk * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3165832Snyan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3265832Snyan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3365832Snyan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3465832Snyan * SUCH DAMAGE. 35140543Simp * 3665832Snyan * from: Utah Hdr: machparam.h 1.11 89/08/14 3765832Snyan * from: @(#)param.h 8.1 (Berkeley) 6/10/93 3865832Snyan * JNPR: param.h,v 1.6.2.1 2007/09/10 07:49:36 girish 3965832Snyan * $FreeBSD: head/sys/mips/include/param.h 205072 2010-03-12 07:08:20Z neel $ 4065832Snyan */ 4165832Snyan 4265832Snyan#ifndef _MIPS_INCLUDE_PARAM_H_ 4365832Snyan#define _MIPS_INCLUDE_PARAM_H_ 4465832Snyan 45142135Simp#include <machine/_align.h> 4665832Snyan 4765832Snyan#include <sys/cdefs.h> 4865832Snyan#ifdef _KERNEL 4965832Snyan#ifdef _LOCORE 50140528Simp#include <machine/psl.h> 51129764Simp#else 52129764Simp#include <machine/cpu.h> 53129740Simp#endif 5465832Snyan#endif 5565832Snyan 56150458Simp#define __PCI_REROUTE_INTERRUPT 5765832Snyan 5865832Snyan#ifndef MACHINE 5965832Snyan#define MACHINE "mips" 6065832Snyan#endif 6165832Snyan#ifndef MACHINE_ARCH 6282778Sshiba#define MACHINE_ARCH "mips" 6382778Sshiba#endif 64140041Simp 65140543Simp/* 66151638Simp * OBJFORMAT_NAMES is a comma-separated list of the object formats 67189681Simp * that are supported on the architecture. 6882778Sshiba */ 69140041Simp#define OBJFORMAT_NAMES "elf" 70147580Simp#define OBJFORMAT_DEFAULT "elf" 71147580Simp 72147580Simp#define MID_MACHINE 0 /* None but has to be defined */ 73147580Simp 74140041Simp#ifdef SMP 75147580Simp#define MAXSMPCPU 16 76147580Simp#define MAXCPU MAXSMPCPU 7782778Sshiba#else 78147580Simp#define MAXSMPCPU 1 7982778Sshiba#define MAXCPU 1 80147580Simp#endif 81147580Simp 82147580Simp/* 83147580Simp * Round p (pointer or byte index) up to a correctly-aligned value for all 84189681Simp * data types (int, long, ...). The result is u_int and must be cast to 85147580Simp * any desired pointer type. 86151638Simp */ 8782778Sshiba 8882778Sshiba#define ALIGNBYTES _ALIGNBYTES 8982778Sshiba#define ALIGN(p) _ALIGN(p) 9082778Sshiba/* 91150396Simp * ALIGNED_POINTER is a boolean macro that checks whether an address 9282778Sshiba * is valid to fetch data elements of type t from on this architecture. 93140528Simp * This does not reflect the optimal alignment, just the possibility 94140528Simp * (within reasonable limits). 95151638Simp */ 96189681Simp#define ALIGNED_POINTER(p, t) ((((unsigned long)(p)) & (sizeof (t) - 1)) == 0) 9782778Sshiba 98151638Simp/* 9982778Sshiba * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 10082778Sshiba * architecture. It should be used with appropriate caution. 101151638Simp */ 102151638Simp#define CACHE_LINE_SHIFT 6 103151638Simp#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 104151638Simp 105151638Simp#define NBPG 4096 /* bytes/page */ 106151638Simp#define PGOFSET (NBPG-1) /* byte offset into page */ 107151638Simp#define PGSHIFT 12 /* LOG2(NBPG) */ 108151638Simp 109151638Simp#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 110151638Simp#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 111189681Simp#define PAGE_MASK (PAGE_SIZE-1) 112189681Simp#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 113189681Simp 114189681Simp#define NBSEG 0x400000 /* bytes/segment */ 115189681Simp#define SEGOFSET (NBSEG-1) /* byte offset into segment */ 116189681Simp#define SEGSHIFT 22 /* LOG2(NBSEG) */ 117189681Simp 118189681Simp#define MAXPAGESIZES 1 /* maximum number of supported page sizes */ 119189681Simp 120189681Simp/* XXXimp: This has moved to vmparam.h */ 121152621Simp/* Also, this differs from the mips2 definition, but likely is better */ 12282778Sshiba/* since this means the kernel won't chew up TLBs when it is executing */ 123151638Simp/* code */ 12482778Sshiba#define KERNBASE 0x80000000 /* start of kernel virtual */ 12582778Sshiba#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 12665832Snyan 12782778Sshiba#define BLKDEV_IOSIZE 2048 /* xxx: Why is this 1/2 page? */ 128150396Simp#define MAXDUMPPGS 1 /* xxx: why is this only one? */ 129150396Simp 13082778Sshiba/* 13165832Snyan * The kernel stack needs to be aligned on a (PAGE_SIZE * 2) boundary. 13265832Snyan * 13365832Snyan * Although we allocate 3 pages for the kernel stack we end up using 13465832Snyan * only the 2 pages that are aligned on a (PAGE_SIZE * 2) boundary. 13565832Snyan */ 13665832Snyan#define KSTACK_PAGES 3 /* kernel stack*/ 13765832Snyan#define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */ 13865832Snyan 13965832Snyan#define UPAGES 2 14065832Snyan 14165832Snyan/* pages ("clicks") (4096 bytes) to disk blocks */ 142189681Simp#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 14365832Snyan#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 144140543Simp 145140543Simp/* 14665832Snyan * Map a ``block device block'' to a file system block. 14765832Snyan * This should be device dependent, and should use the bsize 14865832Snyan * field from the disk label. 14965832Snyan * For now though just use DEV_BSIZE. 150150396Simp */ 15165832Snyan#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 15265832Snyan 153140543Simp/* 15465832Snyan * Conversion macros 15565832Snyan */ 15665832Snyan#define mips_round_page(x) ((((unsigned long)(x)) + NBPG - 1) & ~(NBPG-1)) 15765832Snyan#define mips_trunc_page(x) ((unsigned long)(x) & ~(NBPG-1)) 15865832Snyan#define mips_btop(x) ((unsigned long)(x) >> PGSHIFT) 15965832Snyan#define mips_ptob(x) ((unsigned long)(x) << PGSHIFT) 160140543Simp#define round_page mips_round_page 161140543Simp#define trunc_page mips_trunc_page 162140543Simp#define atop(x) ((unsigned long)(x) >> PAGE_SHIFT) 163140543Simp#define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT) 164140543Simp 16565832Snyan#define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 166140543Simp 167140543Simp#ifndef _KERNEL 168140543Simp#define DELAY(n) { register int N = (n); while (--N > 0); } 169140543Simp#endif /* !_KERNEL */ 170150396Simp 171150396Simp#endif /* !_MIPS_INCLUDE_PARAM_H_ */ 172150396Simp