1/* $NetBSD: param.h,v 1.69 2012/01/24 20:03:37 christos Exp $ */ 2 3/* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)param.h 8.1 (Berkeley) 6/11/93 41 */ 42/* 43 * Sun4M support by Aaron Brown, Harvard University. 44 * Changes Copyright (c) 1995 The President and Fellows of Harvard College. 45 * All rights reserved. 46 */ 47#define _MACHINE sparc 48#define MACHINE "sparc" 49#define _MACHINE_ARCH sparc 50#define MACHINE_ARCH "sparc" 51#define MID_MACHINE MID_SPARC 52 53#include <machine/cpuconf.h> /* XXX */ 54#ifdef _KERNEL /* XXX */ 55#ifndef _LOCORE /* XXX */ 56#include <machine/cpu.h> /* XXX */ 57#endif /* XXX */ 58#endif /* XXX */ 59 60#define SUN4_PGSHIFT 13 /* for a sun4 machine */ 61#define SUN4CM_PGSHIFT 12 /* for a sun4c or sun4m machine */ 62 63/* 64 * The following variables are always defined and initialized (in locore) 65 * so independently compiled modules (e.g. LKMs) can be used irrespective 66 * of the `options SUN4?' combination a particular kernel was configured with. 67 * See also the definitions of NBPG, PGOFSET and PGSHIFT below. 68 */ 69#if (defined(_KERNEL) || defined(_STANDALONE)) && !defined(_LOCORE) 70extern int nbpg, pgofset, pgshift; 71#endif 72 73#if !(defined(PROM_AT_F0) || defined(MSIIEP)) 74#define KERNBASE 0xf0000000 /* start of kernel virtual space */ 75#else 76/* 77 * JS1/OF has prom sitting in f000.0000..f007.ffff, modify kernel VA 78 * layout to work around that. XXX - kernel should live beyound prom on 79 * those machines. 80 */ 81#define KERNBASE 0xe8000000 82#endif 83#define KERNEND 0xfe000000 /* end of kernel virtual space */ 84/* Arbitrarily only use 1/4 of the kernel address space for buffers. */ 85#define VM_MAX_KERNEL_BUF ((KERNEND - KERNBASE)/4) 86#define PROM_LOADADDR 0x00004000 /* where the prom loads us */ 87#define KERNTEXTOFF (KERNBASE+PROM_LOADADDR)/* start of kernel text */ 88 89#define DEV_BSIZE 512 90#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 91#define BLKDEV_IOSIZE 2048 92#define MAXPHYS (64 * 1024) 93 94#define SSIZE 1 /* initial stack size in pages */ 95#define USPACE 8192 96 97/* 98 * Constants related to network buffer management. 99 * MCLBYTES must be no larger than NBPG (the software page size), and, 100 * on machines that exchange pages of input or output buffers with mbuf 101 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 102 * of the hardware page size. 103 */ 104#define MSIZE 256 /* size of an mbuf */ 105 106#ifndef MCLSHIFT 107#define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 108 /* 2K cluster can hold Ether frame */ 109#endif /* MCLSHIFT */ 110 111#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 112 113/* 114 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 115 * logical pages. 116 */ 117#define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 118#define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 119 120#if defined(_KERNEL) || defined(_STANDALONE) 121#ifndef _LOCORE 122extern void delay(unsigned int); 123#define DELAY(n) delay(n) 124#endif /* _LOCORE */ 125 126/* 127 * microSPARC-IIep is a sun4m but with an integrated PCI controller. 128 * In a lot of places (like pmap &c) we want it to be treated as SUN4M. 129 * But since various low-level things are done very differently from 130 * normal sparcs (and since for now it requires a relocated kernel 131 * anyway), the MSIIEP kernels are not supposed to support any other 132 * system. So insist on SUN4M defined and SUN4 and SUN4C not defined. 133 */ 134#if defined(MSIIEP) 135#if defined(SUN4) || defined(SUN4C) || defined(SUN4D) 136#error "microSPARC-IIep kernels cannot support sun4, sun4c, or sun4d" 137#endif 138#if !defined(SUN4M) 139#error "microSPARC-IIep kernel must have 'options SUN4M'" 140#endif 141#endif /* MSIIEP */ 142 143/* 144 * Sun4 machines have a page size of 8192. All other machines have a page 145 * size of 4096. Short cut page size variables if we can. 146 */ 147#if CPU_NTYPES != 0 && !defined(SUN4) 148# define NBPG 4096 149# define PGOFSET (NBPG-1) 150# define PGSHIFT SUN4CM_PGSHIFT 151#elif CPU_NTYPES == 1 && defined(SUN4) 152# define NBPG 8192 153# define PGOFSET (NBPG-1) 154# define PGSHIFT SUN4_PGSHIFT 155#else 156# define NBPG nbpg 157# define PGOFSET pgofset 158# define PGSHIFT pgshift 159#endif 160 161#endif /* _KERNEL || _STANDALONE */ 162