param.h revision 1.2
1/* $NetBSD: param.h,v 1.2 1999/12/04 21:21:23 ragge Exp $ */ 2 3/*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)param.h 5.8 (Berkeley) 6/28/91 39 */ 40 41/* 42 * Machine dependent constants for mmEye. 43 */ 44 45#ifdef _KERNEL 46#ifdef _LOCORE 47#include <machine/psl.h> 48#else 49#include <machine/cpu.h> 50#endif 51#endif 52 53#define _MACHINE sh3 54#define MACHINE "sh3" 55#define _MACHINE_ARCH sh3 56#define MACHINE_ARCH "sh3" 57#define MID_MACHINE MID_SH3 58 59/* 60 * Round p (pointer or byte index) up to a correctly-aligned value 61 * for all data types (int, long, ...). The result is u_int and 62 * must be cast to any desired pointer type. 63 * 64 * ALIGNED_POINTER is a boolean macro that checks whether an address 65 * is valid to fetch data elements of type t from on this architecture. 66 * This does not reflect the optimal alignment, just the possibility 67 * (within reasonable limits). 68 * 69 */ 70#define ALIGNBYTES (sizeof(int) - 1) 71#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 72#define ALIGNED_POINTER(p, t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 73/* #define ALIGNED_POINTER(p, t) 1 */ 74 75#define PGSHIFT 12 /* LOG2(NBPG) */ 76#define NBPG (1 << PGSHIFT) /* bytes/page */ 77#define PGOFSET (NBPG-1) /* byte offset into page */ 78#define NPTEPG (NBPG/(sizeof (pt_entry_t))) 79 80#define KERNBASE 0x8c000000 /* start of kernel virtual space */ 81#define KERNSIZE 0x01800000 /* size of kernel virtual space */ 82#define KERNTEXTOFF 0x8c000000 /* start of kernel text */ 83#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 84 85#define NPGDIR (1*NBPG) 86#define SYSMAP (5*NBPG) /* page table area offset from _end */ 87 88#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 89#define DEV_BSIZE (1 << DEV_BSHIFT) 90#define BLKDEV_IOSIZE 2048 91#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 92 93#define SSIZE 1 /* initial stack size/NBPG */ 94#define SINCR 1 /* increment of stack/NBPG */ 95#if 0 96#define UPAGES 2 /* pages of u-area */ 97#else 98#define UPAGES 4 /* pages of u-area */ 99#endif 100#define USPACE (UPAGES * NBPG) /* total size of u-area */ 101 102#ifndef MSGBUFSIZE 103#define MSGBUFSIZE NBPG /* default message buffer size */ 104#endif 105 106/* 107 * Constants related to network buffer management. 108 * MCLBYTES must be no larger than NBPG (the software page size), and, 109 * on machines that exchange pages of input or output buffers with mbuf 110 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 111 * of the hardware page size. 112 */ 113#define MSIZE 128 /* size of an mbuf */ 114 115#ifndef MCLSHIFT 116# define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 117#endif /* MCLSHIFT */ 118 119#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 120#define MCLOFSET (MCLBYTES - 1) /* offset within a m_buf cluster */ 121 122#ifndef NMBCLUSTERS 123#ifdef GATEWAY 124#define NMBCLUSTERS 512 /* map size, max cluster allocation */ 125#else 126#define NMBCLUSTERS 256 /* map size, max cluster allocation */ 127#endif 128#endif 129 130/* 131 * Size of kernel malloc arena in NBPG-sized logical pages 132 */ 133#ifndef NKMEMCLUSTERS 134#define NKMEMCLUSTERS (6 * 1024 * 1024 / NBPG) 135#endif 136 137/* pages ("clicks") to disk blocks */ 138#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 139#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 140 141/* bytes to pages */ 142#define ctob(x) ((x) << PGSHIFT) 143#define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 144 145/* bytes to disk blocks */ 146#define dbtob(x) ((x) << DEV_BSHIFT) 147#define btodb(x) ((x) >> DEV_BSHIFT) 148 149/* 150 * Map a ``block device block'' to a file system block. 151 * This should be device dependent, and should use the bsize 152 * field from the disk label. 153 * For now though just use DEV_BSIZE. 154 */ 155#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) 156 157/* 158 * Mach derived conversion macros 159 */ 160#define sh3_round_pdr(x) ((((unsigned)(x)) + PDOFSET) & ~PDOFSET) 161#define sh3_trunc_pdr(x) ((unsigned)(x) & ~PDOFSET) 162#define sh3_btod(x) ((unsigned)(x) >> PDSHIFT) 163#define sh3_dtob(x) ((unsigned)(x) << PDSHIFT) 164#define sh3_round_page(x) ((((unsigned)(x)) + PGOFSET) & ~PGOFSET) 165#define sh3_trunc_page(x) ((unsigned)(x) & ~PGOFSET) 166#define sh3_btop(x) ((unsigned)(x) >> PGSHIFT) 167#define sh3_ptob(x) ((unsigned)(x) << PGSHIFT) 168