1 /* $NetBSD: param.h,v 1.17 2003/03/04 07:50:58 matt 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 #ifndef _POWERPC_PARAM_H 35 #define _POWERPC_PARAM_H 36 37 #ifdef _KERNEL 38 #if defined(_KERNEL_OPT) 39 #include "opt_ppcarch.h" 40 #endif 41 #ifndef _LOCORE 42 #include <machine/cpu.h> 43 #endif /* _LOCORE */ 44 #endif 45 46 /* 47 * Machine dependent constants for PowerPC (32-bit only currently) 48 */ 49 #ifndef MACHINE 50 #define MACHINE "powerpc" 51 #endif 52 #define MACHINE_ARCH "powerpc" 53 #define MID_MACHINE MID_POWERPC 54 55 #define ALIGNBYTES (sizeof(double) - 1) 56 #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) & ~ALIGNBYTES) 57 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 58 59 #ifdef PPC_IBM4XX 60 #define PGSHIFT 14 /* Use 16KB to reduce TLB thrashing */ 61 #define UPAGES 1 62 #else 63 #define PGSHIFT 12 64 #define UPAGES 4 65 #endif 66 #define NBPG (1 << PGSHIFT) /* Page size */ 67 #define PGOFSET (NBPG - 1) 68 69 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 70 #define DEV_BSIZE (1 << DEV_BSHIFT) 71 #define BLKDEV_IOSIZE NBPG 72 #ifndef MAXPHYS 73 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 74 #endif 75 76 #define USPACE (UPAGES * NBPG) 77 78 #ifndef MSGBUFSIZE 79 #define MSGBUFSIZE (2*NBPG) /* default message buffer size */ 80 #endif 81 82 #ifndef KERNBASE 83 #define KERNBASE 0x100000 84 #endif 85 86 /* 87 * Constants related to network buffer management. 88 * MCLBYTES must be no larger than NBPG (the software page size), and, 89 * on machines that exchange pages of input or output buffers with mbuf 90 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 91 * of the hardware page size. 92 */ 93 #define MSIZE 256 /* size of an mbuf */ 94 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 95 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 96 97 #ifndef NMBCLUSTERS 98 99 #if defined(_KERNEL_OPT) 100 #include "opt_gateway.h" 101 #endif 102 103 #ifdef GATEWAY 104 #define NMBCLUSTERS 2048 /* map size, max cluster allocation */ 105 #else 106 #define NMBCLUSTERS 1024 /* map size, max cluster allocation */ 107 #endif 108 #endif 109 110 /* 111 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 112 * logical pages. 113 */ 114 #ifndef NKMEMPAGES_MIN_DEFAULT 115 #define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 116 #endif 117 #ifndef NKMEMPAGES_MAX_DEFAULT 118 #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 119 #endif 120 121 /* 122 * pages ("clicks") to disk blocks 123 */ 124 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 125 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 126 /* 127 * bytes to pages 128 */ 129 #define ctob(x) ((x) << PGSHIFT) 130 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 131 132 /* 133 * bytes to disk blocks 134 */ 135 #define dbtob(x) ((x) << DEV_BSHIFT) 136 #define btodb(x) ((x) >> DEV_BSHIFT) 137 138 #endif /* _POWERPC_PARAM_H_ */ 139