1 /* $OpenBSD: param.h,v 1.17 2001/07/09 02:14:05 mickey Exp $ */ 2 /* $NetBSD: param.h,v 1.1 1996/09/30 16:34:28 ws Exp $ */ 3 4 /*- 5 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 6 * Copyright (C) 1995, 1996 TooLs GmbH. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by TooLs GmbH. 20 * 4. The name of TooLs GmbH may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #ifdef _KERNEL 36 #ifndef _LOCORE 37 #include <machine/cpu.h> 38 #endif /* _LOCORE */ 39 #endif 40 41 42 /* 43 * Machine dependent constants for PowerPC (32-bit only currently) 44 */ 45 #define MACHINE "powerpc" 46 #define _MACHINE powerpc 47 #define MACHINE_ARCH "powerpc" 48 #define _MACHINE_ARCH powerpc 49 50 #define MID_MACHINE 0 /* None but has to be defined */ 51 52 #define ALIGNBYTES (sizeof(double) - 1) 53 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES) 54 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 55 56 #define PGSHIFT 12 57 #define NBPG 4096 58 #define PGOFSET (NBPG - 1) 59 #define PAGE_SIZE NBPG 60 #define PAGE_MASK PGOFSET 61 #define PAGE_SHIFT PGSHIFT 62 63 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 64 #define DEV_BSIZE (1 << DEV_BSHIFT) 65 #define BLKDEV_IOSIZE NBPG 66 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 67 68 #define UPAGES 4 69 #define USPACE (UPAGES * NBPG) 70 71 #define KERNBASE 0x100000 72 73 /* 74 * Constants related to network buffer management. 75 * MCLBYTES must be no larger than the software page size, and, 76 * on machines that exchange pages of input or output buffers with mbuf 77 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 78 * of the hardware page size. 79 */ 80 #define MSIZE 256 /* size of an mbuf */ 81 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 82 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 83 #define MCLOFSET (MCLBYTES - 1) 84 85 #ifndef NMBCLUSTERS 86 #ifdef GATEWAY 87 #define NMBCLUSTERS 2048 /* map size, max cluster allocation */ 88 #else 89 #define NMBCLUSTERS 1024 /* map size, max cluster allocation */ 90 #endif 91 #endif 92 93 #define MSGBUFSIZE (NBPG*2) 94 95 /* 96 * Size of kernel malloc arena in logical pages. 97 */ 98 #ifndef NKMEMCLUSTERS 99 #define NKMEMCLUSTERS (16 * 1024 * 1024 / PAGE_SIZE) 100 #endif 101 102 /* 103 * pages ("clicks") to disk blocks 104 */ 105 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 106 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 107 /* 108 * bytes to pages 109 */ 110 #define ctob(x) ((x) << PGSHIFT) 111 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 112 113 /* 114 * bytes to disk blocks 115 */ 116 #define dbtob(x) ((x) << DEV_BSHIFT) 117 #define btodb(x) ((x) >> DEV_BSHIFT) 118 119 /* 120 * Mach derived conversion macros 121 */ 122 #define powerpc_btop(x) ((unsigned)(x) >> PGSHIFT) 123 #define powerpc_ptob(x) ((unsigned)(x) << PGSHIFT) 124 125 /* 126 * Segment handling stuff 127 */ 128 #define SEGMENT_LENGTH 0x10000000 129 #define SEGMENT_MASK 0xf0000000 130 131 /* 132 * Fixed segments 133 */ 134 #define USER_SR 13 135 #define KERNEL_SR 14 136 #define KERNEL_SEGMENT (0xfffff0 + KERNEL_SR) 137 #define EMPTY_SEGMENT 0xfffff0 138 #define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHFT)) 139 140 #define __COMPAT_OLD_TIMEOUTS 141 142 /* 143 * Some system constants 144 */ 145 #ifndef NPMAPS 146 #define NPMAPS 32768 /* Number of pmaps in system */ 147 #endif 148 149 /* 150 * Temporary kludge till we do (ov)bcopy in assembler 151 */ 152 #define ovbcopy bcopy 153