1 /*- 2 * Copyright (c) 2001 David E. O'Brien 3 * Copyright (c) 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * William Jolitz. 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 the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: @(#)param.h 5.8 (Berkeley) 6/28/91 38 * $FreeBSD$ 39 */ 40 41 /* 42 * Machine dependent constants for PowerPC (32-bit only currently) 43 */ 44 45 /* 46 * Round p (pointer or byte index) up to a correctly-aligned value 47 * for all data types (int, long, ...). The result is unsigned int 48 * and must be cast to any desired pointer type. 49 */ 50 #ifndef _ALIGNBYTES 51 #define _ALIGNBYTES (sizeof(int) - 1) 52 #endif 53 #ifndef _ALIGN 54 #define _ALIGN(p) (((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES) 55 #endif 56 57 #ifndef _MACHINE 58 #define _MACHIN "powerpc" 59 #endif 60 #ifndef _MACHINE_ARCH 61 #define _MACHINE_ARCH "powerpc" 62 #endif 63 64 #ifndef _NO_NAMESPACE_POLLUTION 65 66 #ifndef _MACHINE_PARAM_H_ 67 #define _MACHINE_PARAM_H_ 68 69 #ifndef MACHINE 70 #define MACHINE "powerpc" 71 #endif 72 #ifndef MACHINE_ARCH 73 #define MACHINE_ARCH "powerpc" 74 #endif 75 #define MID_MACHINE MID_POWERPC 76 77 #if !defined(LOCORE) 78 #include <machine/cpu.h> 79 #endif 80 81 /* 82 * OBJFORMAT_NAMES is a comma-separated list of the object formats 83 * that are supported on the architecture. 84 */ 85 #define OBJFORMAT_NAMES "elf" 86 #define OBJFORMAT_DEFAULT "elf" 87 88 #ifdef SMP 89 #define MAXCPU 2 90 #else 91 #define MAXCPU 1 92 #endif /* SMP */ 93 94 #define ALIGNBYTES _ALIGNBYTES 95 #define ALIGN(p) _ALIGN(p) 96 97 #define PAGE_SHIFT 12 98 #define PAGE_SIZE (1 << PAGE_SHIFT) /* Page size */ 99 #define PAGE_MASK (PAGE_SIZE - 1) 100 #define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 101 102 #define KERNBASE 0x100000 /* start of kernel virtual */ 103 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 104 105 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 106 #define DEV_BSIZE (1 << DEV_BSHIFT) 107 108 #ifndef BLKDEV_IOSIZE 109 #define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */ 110 #endif 111 #define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */ 112 #define MAXPHYS (128 * 1024) /* max raw I/O transfer size */ 113 #define MAXDUMPPGS (DFLTPHYS/PAGE_SIZE) 114 115 #ifndef KSTACK_UPAGES 116 #define KSTACK_PAGES 2 /* includes pcb */ 117 #endif 118 #define USPACE (KSTACK_PAGES * PAGE_SIZE) /* total size of pcb */ 119 #define UAREA_PAGES 1 /* holds struct user WITHOUT PCB */ 120 121 /* 122 * Constants related to network buffer management. 123 * MCLBYTES must be no larger than PAGE_SIZE. 124 */ 125 #ifndef MSIZE 126 #define MSIZE 256 /* size of an mbuf */ 127 #endif /* MSIZE */ 128 129 #ifndef MCLSHIFT 130 #define MCLSHIFT 11 /* convert bytes to mbuf clusters */ 131 #endif /* MCLSHIFT */ 132 #define MCLBYTES (1 << MCLSHIFT) /* size of an mbuf cluster */ 133 134 /* 135 * Some macros for units conversion 136 */ 137 138 /* pages ("clicks") to bytes */ 139 #define ctob(x) ((x) << PAGE_SHIFT) 140 141 /* bytes to clicks */ 142 #define btoc(x) (((unsigned)(x) + PAGE_MASK) >> PAGE_SHIFT) 143 144 /* pages ("clicks") to disk blocks */ 145 #define ctod(x) ((x) << (PAGE_SHIFT - DEV_BSHIFT)) 146 #define dtoc(x) ((x) >> (PAGE_SHIFT - DEV_BSHIFT)) 147 148 /* bytes to disk blocks */ 149 /* 150 * btodb() is messy and perhaps slow because `bytes' may be an off_t. We 151 * want to shift an unsigned type to avoid sign extension and we don't 152 * want to widen `bytes' unnecessarily. Assume that the result fits in 153 * a daddr_t. 154 */ 155 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 156 (sizeof (bytes) > sizeof(long) \ 157 ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \ 158 : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT)) 159 160 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 161 ((off_t)(db) << DEV_BSHIFT) 162 163 /* 164 * Mach derived conversion macros 165 */ 166 #define trunc_page(x) ((unsigned long)(x) & ~(PAGE_MASK)) 167 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 168 #define trunc_4mpage(x) ((unsigned)(x) & ~PDRMASK) 169 #define round_4mpage(x) ((((unsigned)(x)) + PDRMASK) & ~PDRMASK) 170 171 #define atop(x) ((unsigned long)(x) >> PAGE_SHIFT) 172 #define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT) 173 174 #define powerpc_btop(x) ((unsigned)(x) >> PAGE_SHIFT) 175 #define powerpc_ptob(x) ((unsigned)(x) << PAGE_SHIFT) 176 177 #define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 178 179 /* XXX: NetBSD defines that we're using for the moment */ 180 #define USER_SR 13 181 #define KERNEL_SR 14 182 #define KERNEL_SEGMENT (0xfffff0 + KERNEL_SR) 183 #define EMPTY_SEGMENT 0xfffff0 184 #define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHFT)) 185 #define SEGMENT_LENGTH 0x10000000 186 #define SEGMENT_MASK 0xf0000000 187 188 #if !defined(NPMAPS) 189 #define NPMAPS 32768 190 #endif /* !defined(NPMAPS) */ 191 192 #if !defined(MSGBUFSIZE) 193 #define MSGBUFSIZE PAGE_SIZE 194 #endif /* !defined(MSGBUFSIZE) */ 195 196 /* 197 * XXX: Stop NetBSD msgbuf_paddr code from happening. 198 */ 199 #define MSGBUFADDR 200 201 #endif /* !_MACHINE_PARAM_H_ */ 202 #endif /* !_NO_NAMESPACE_POLLUTION */ 203