1 /* $OpenBSD: param.h,v 1.30 2007/11/04 13:43:39 martin 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 2048 66 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 67 68 #define UPAGES 4 69 #define USPACE (UPAGES * NBPG) 70 #define USPACE_ALIGN (0) /* u-area alignment 0-none */ 71 72 /* 73 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 74 * logical pages. 75 */ 76 #define NKMEMPAGES_MIN_DEFAULT ((4 * 1024 * 1024) >> PAGE_SHIFT) 77 #define NKMEMPAGES_MAX_DEFAULT ((64 * 1024 * 1024) >> PAGE_SHIFT) 78 79 /* 80 * Constants related to network buffer management. 81 */ 82 #define NMBCLUSTERS 4096 /* map size, max cluster allocation */ 83 84 /* 85 * pages ("clicks") to disk blocks 86 */ 87 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 88 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 89 90 /* 91 * bytes to disk blocks 92 */ 93 #define dbtob(x) ((x) << DEV_BSHIFT) 94 #define btodb(x) ((x) >> DEV_BSHIFT) 95 96 /* 97 * Segment handling stuff 98 */ 99 #define PPC_SEGMENT_LENGTH 0x10000000 100 #define PPC_SEGMENT_MASK 0xf0000000 101 102 /* 103 * Fixed segments 104 */ 105 #define PPC_USER_SR 13 106 #define PPC_KERNEL_SR 14 107 #define PPC_KERNEL_SEG0 0xfffff0 108 #define PPC_KERNEL_SEGMENT (PPC_KERNEL_SEG0 + PPC_KERNEL_SR) 109 #define PPC_USER_ADDR ((void *)(PPC_USER_SR << ADDR_SR_SHIFT)) 110 111 /* 112 * Some system constants 113 */ 114 #ifndef NPMAPS 115 #define NPMAPS 32768 /* Number of pmaps in system */ 116 #endif 117 118 /* 119 * Temporary kludge till we do (ov)bcopy in assembler 120 */ 121 #define ovbcopy bcopy 122 123 #endif /* _POWERPC_PARAM_H_ */ 124