1 /* $OpenBSD: param.h,v 1.22 2002/11/21 03:59:16 drahn 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 #ifndef _POWERPC_PARAM_H_ 36 #define _POWERPC_PARAM_H_ 37 38 #ifdef _KERNEL 39 #ifndef _LOCORE 40 #include <machine/cpu.h> 41 #endif /* _LOCORE */ 42 #endif 43 44 /* 45 * Machine dependent constants for PowerPC (32-bit only currently) 46 */ 47 #define MACHINE_ARCH "powerpc" 48 #define _MACHINE_ARCH powerpc 49 50 #define MID_MACHINE MID_POWERPC 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 PAGE_SHIFT 12 57 #define PAGE_SIZE 4096 58 #define PAGE_MASK (PAGE_SIZE - 1) 59 #define PGSHIFT PAGE_SHIFT 60 #define NBPG PAGE_SIZE 61 #define PGOFSET PAGE_MASK 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 /* 72 * Constants related to network buffer management. 73 * MCLBYTES must be no larger than the software page size, and, 74 * on machines that exchange pages of input or output buffers with mbuf 75 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 76 * of the hardware page size. 77 */ 78 #define MSIZE 256 /* size of an mbuf */ 79 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 80 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 81 #define MCLOFSET (MCLBYTES - 1) 82 83 #ifndef NMBCLUSTERS 84 #ifdef GATEWAY 85 #define NMBCLUSTERS 2048 /* map size, max cluster allocation */ 86 #else 87 #define NMBCLUSTERS 1024 /* map size, max cluster allocation */ 88 #endif 89 #endif 90 91 /* 92 * pages ("clicks") to disk blocks 93 */ 94 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 95 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 96 /* 97 * bytes to pages 98 */ 99 #define ctob(x) ((x) << PGSHIFT) 100 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 101 102 /* 103 * bytes to disk blocks 104 */ 105 #define dbtob(x) ((x) << DEV_BSHIFT) 106 #define btodb(x) ((x) >> DEV_BSHIFT) 107 108 /* 109 * Mach derived conversion macros 110 */ 111 #define powerpc_btop(x) ((unsigned)(x) >> PGSHIFT) 112 #define powerpc_ptob(x) ((unsigned)(x) << PGSHIFT) 113 114 /* 115 * Segment handling stuff 116 */ 117 #define SEGMENT_LENGTH 0x10000000 118 #define SEGMENT_MASK 0xf0000000 119 120 /* 121 * Fixed segments 122 */ 123 #define USER_SR 13 124 #define KERNEL_SR 14 125 #define KERNEL_SEG0 0xfffff0 126 #define KERNEL_SEGMENT (KERNEL_SEG0 + KERNEL_SR) 127 #define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHIFT)) 128 129 /* 130 * Some system constants 131 */ 132 #ifndef NPMAPS 133 #define NPMAPS 32768 /* Number of pmaps in system */ 134 #endif 135 136 /* 137 * Temporary kludge till we do (ov)bcopy in assembler 138 */ 139 #define ovbcopy bcopy 140 141 #endif /* _POWERPC_PARAM_H_ */ 142