1 /* $NetBSD: param.h,v 1.1 1996/09/30 16:34:28 ws Exp $ */ 2 3 /*- 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #ifdef _KERNEL 35 #ifndef _LOCORE 36 #include <machine/cpu.h> 37 #endif /* _LOCORE */ 38 #endif 39 40 /* 41 * Machine dependent constants for PowerPC (32-bit only currently) 42 */ 43 #define MACHINE "powerpc" 44 #define MACHINE_ARCH "powerpc" 45 #define MID_MACHINE MID_POWERPC 46 47 #define ALIGNBYTES (sizeof(double) - 1) 48 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES) 49 50 #define PGSHIFT 12 51 #define NBPG (1 << PGSHIFT) /* Page size */ 52 #define PGOFSET (NBPG - 1) 53 54 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 55 #define DEV_BSIZE (1 << DEV_BSHIFT) 56 #define BLKDEV_IOSIZE NBPG 57 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 58 59 #define CLSIZELOG2 0 60 #define CLSIZE (1 << CLSIZELOG2) 61 62 #define UPAGES 4 63 #define USPACE (UPAGES * NBPG) 64 65 #define KERNBASE 0x100000 66 67 /* 68 * Constants related to network buffer management. 69 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 70 * on machines that exchange pages of input or output buffers with mbuf 71 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 72 * of the hardware page size. 73 */ 74 #define MSIZE 128 /* size of an mbuf */ 75 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 76 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 77 78 #ifndef NMBCLUSTERS 79 #ifdef GATEWAY 80 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 81 #else 82 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 83 #endif 84 #endif 85 86 /* 87 * Size of kernel malloc arena in CLBYTES-sized logical pages. 88 */ 89 #ifndef NKMEMCLUSTERS 90 #define NKMEMCLUSTERS (128 * 1024 * 1024 / CLBYTES) 91 #endif 92 93 /* 94 * pages ("clicks") to disk blocks 95 */ 96 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 97 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 98 /* 99 * bytes to pages 100 */ 101 #define ctob(x) ((x) << PGSHIFT) 102 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 103 104 /* 105 * bytes to disk blocks 106 */ 107 #define dbtob(x) ((x) << DEV_BSHIFT) 108 #define btodb(x) ((x) >> DEV_BSHIFT) 109 110 /* 111 * Segment handling stuff 112 */ 113 #define SEGMENT_LENGTH 0x10000000 114 #define SEGMENT_MASK 0xf0000000 115 116 /* 117 * Fixed segments 118 */ 119 #define USER_SR 13 120 #define KERNEL_SR 14 121 #define KERNEL_SEGMENT (0xfffff0 + KERNEL_SR) 122 #define EMPTY_SEGMENT 0xfffff0 123 #define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHFT)) 124 125 /* 126 * Some system constants 127 */ 128 #ifndef HTABENTS 129 #define HTABENTS 1024 /* Number of hashslots in HTAB */ 130 #endif 131 #ifndef NPMAPS 132 #define NPMAPS 32768 /* Number of pmaps in system */ 133 #endif 134 135 /* 136 * Temporary kludge till we do (ov)bcopy in assembler 137 */ 138 #define ovbcopy bcopy 139