1 /* $NetBSD: param.h,v 1.32 2002/02/26 15:13:20 simonb Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department and Ralph Campbell. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: Utah $Hdr: machparam.h 1.11 89/08/14$ 41 * 42 * @(#)param.h 8.1 (Berkeley) 6/10/93 43 */ 44 45 /* 46 * Machine dependent constants for the Alpha. 47 */ 48 #define _MACHINE alpha 49 #define MACHINE "alpha" 50 #define _MACHINE_ARCH alpha 51 #define MACHINE_ARCH "alpha" 52 #define MID_MACHINE MID_ALPHA 53 54 #include <machine/cpu.h> 55 56 /* 57 * Round p (pointer or byte index) up to a correctly-aligned value for all 58 * data types (int, long, ...). The result is u_long and must be cast to 59 * any desired pointer type. 60 * 61 * ALIGNED_POINTER is a boolean macro that checks whether an address 62 * is valid to fetch data elements of type t from on this architecture. 63 * This does not reflect the optimal alignment, just the possibility 64 * (within reasonable limits). 65 * 66 */ 67 #define ALIGNBYTES 7 68 #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES) 69 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 70 71 #define NBPG (1 << ALPHA_PGSHIFT) /* bytes/page */ 72 #define PGOFSET (NBPG-1) /* byte off. into pg */ 73 #define PGSHIFT ALPHA_PGSHIFT /* LOG2(NBPG) */ 74 75 #define KERNBASE 0xfffffc0000230000 /* start of kernel virtual */ 76 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 77 78 #define DEV_BSIZE 512 79 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 80 #define BLKDEV_IOSIZE 2048 81 #ifndef MAXPHYS 82 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 83 #endif 84 85 #define SSIZE 1 /* initial stack size/NBPG */ 86 #define SINCR 1 /* increment of stack/NBPG */ 87 88 #define UPAGES 2 /* pages of u-area */ 89 #define USPACE (UPAGES * NBPG) /* total size of u-area */ 90 91 #ifndef MSGBUFSIZE 92 #define MSGBUFSIZE NBPG /* default message buffer size */ 93 #endif 94 95 /* 96 * Constants related to network buffer management. 97 * MCLBYTES must be no larger than NBPG (the software page size), and, 98 * on machines that exchange pages of input or output buffers with mbuf 99 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 100 * of the hardware page size. 101 */ 102 #define MSIZE 256 /* size of an mbuf */ 103 104 #ifndef MCLSHIFT 105 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 106 /* 2K cluster can hold Ether frame */ 107 #endif /* MCLSHIFT */ 108 109 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 110 111 #ifndef NMBCLUSTERS 112 #if defined(_KERNEL_OPT) 113 #include "opt_gateway.h" 114 #endif 115 116 #ifdef GATEWAY 117 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 118 #else 119 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 120 #endif 121 #endif 122 123 /* 124 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 125 * logical pages. 126 */ 127 #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT) 128 #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 129 130 /* pages ("clicks") to disk blocks */ 131 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 132 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 133 134 /* pages to bytes */ 135 #define ctob(x) ((x) << PGSHIFT) 136 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 137 138 /* bytes to disk blocks */ 139 #define btodb(x) ((x) >> DEV_BSHIFT) 140 #define dbtob(x) ((x) << DEV_BSHIFT) 141 142 /* 143 * Map a ``block device block'' to a file system block. 144 * This should be device dependent, and should use the bsize 145 * field from the disk label. 146 * For now though just use DEV_BSIZE. 147 */ 148 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 149 150 /* 151 * Mach derived conversion macros 152 */ 153 #define alpha_round_page(x) ((((unsigned long)(x)) + NBPG - 1) & ~(NBPG-1)) 154 #define alpha_trunc_page(x) ((unsigned long)(x) & ~(NBPG-1)) 155 #define alpha_btop(x) ((unsigned long)(x) >> PGSHIFT) 156 #define alpha_ptob(x) ((unsigned long)(x) << PGSHIFT) 157 158 #ifdef _KERNEL 159 #ifndef _LOCORE 160 161 #include <machine/intr.h> 162 163 void delay(unsigned long); 164 #define DELAY(n) delay(n) 165 166 /* XXX THE FOLLOWING PROTOTYPE SHOULD BE A BUS.H INTERFACE */ 167 paddr_t alpha_XXX_dmamap(vaddr_t); 168 /* XXX END BUS.H */ 169 170 #endif 171 #endif /* !_KERNEL */ 172