1 /* $NetBSD: param.h,v 1.17 2010/02/08 19:02:30 joerg Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 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 * the Systems Programming Group of the University of Utah Computer 9 * Science Department. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * from: Utah $Hdr: machparam.h 1.16 92/12/20$ 36 * 37 * @(#)param.h 8.1 (Berkeley) 6/10/93 38 */ 39 /* 40 * Copyright (c) 1988 University of Utah. 41 * 42 * This code is derived from software contributed to Berkeley by 43 * the Systems Programming Group of the University of Utah Computer 44 * Science Department. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Berkeley and its contributors. 58 * 4. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 * from: Utah $Hdr: machparam.h 1.16 92/12/20$ 75 * 76 * @(#)param.h 8.1 (Berkeley) 6/10/93 77 */ 78 #ifndef _M68K_PARAM_H_ 79 #define _M68K_PARAM_H_ 80 81 /* 82 * Machine independent constants for m68k 83 */ 84 #ifndef MACHINE_ARCH 85 #define _MACHINE_ARCH m68k 86 #define MACHINE_ARCH "m68k" 87 #endif 88 #ifndef MID_MACHINE 89 #define MID_MACHINE MID_M68K 90 #endif 91 92 /* 93 * Round p (pointer or byte index) up to a correctly-aligned value for all 94 * data types (int, long, ...). The result is u_int and must be cast to 95 * any desired pointer type. 96 * 97 * ALIGNED_POINTER is a boolean macro that checks whether an address 98 * is valid to fetch data elements of type t from on this architecture. 99 * This does not reflect the optimal alignment, just the possibility 100 * (within reasonable limits). 101 * 102 */ 103 #define ALIGNBYTES (sizeof(int) - 1) 104 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 105 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 106 107 #define NBPG (1 << PGSHIFT) /* bytes/page */ 108 #define PGOFSET (NBPG-1) /* byte offset into page */ 109 110 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 111 112 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 113 #define DEV_BSIZE (1 << DEV_BSHIFT) 114 #define BLKDEV_IOSIZE 2048 115 #ifndef MAXPHYS 116 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 117 #endif 118 119 #define SSIZE 1 /* initial stack size/NBPG */ 120 #define SINCR 1 /* increment of stack/NBPG */ 121 122 #define USPACE (UPAGES * NBPG) 123 124 #ifndef MSGBUFSIZE 125 #define MSGBUFSIZE NBPG /* default message buffer size */ 126 #endif 127 128 /* 129 * Constants related to network buffer management. 130 * MCLBYTES must be no larger than NBPG (the software page size), and, 131 * on machines that exchange pages of input or output buffers with mbuf 132 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 133 * of the hardware page size. 134 */ 135 #define MSIZE 256 /* size of an mbuf */ 136 137 #ifndef MCLSHIFT 138 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 139 /* 2K cluster can hold Ether frame */ 140 #endif /* MCLSHIFT */ 141 142 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 143 144 /* 145 * Mach-derived conversion macros 146 */ 147 #define m68k_round_page(x) ((((vaddr_t)(x)) + PGOFSET) & ~PGOFSET) 148 #define m68k_trunc_page(x) ((vaddr_t)(x) & ~PGOFSET) 149 #define m68k_page_offset(x) ((vaddr_t)(x) & PGOFSET) 150 #define m68k_btop(x) ((vaddr_t)(x) >> PGSHIFT) 151 #define m68k_ptob(x) ((vaddr_t)(x) << PGSHIFT) 152 153 #endif /* !_M68K_PARAM_H_ */ 154