1 /* $OpenBSD: param.h,v 1.20 2001/05/05 20:56:31 art Exp $ */ 2 /* $NetBSD: param.h,v 1.30 2000/06/09 16:03:04 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 1988 University of Utah. 6 * Copyright (c) 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * the Systems Programming Group of the University of Utah Computer 11 * Science Department and Ralph Campbell. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * from: Utah $Hdr: machparam.h 1.11 89/08/14$ 42 * 43 * @(#)param.h 8.1 (Berkeley) 6/10/93 44 */ 45 46 /* 47 * Machine dependent constants for the Alpha. 48 */ 49 #define _MACHINE alpha 50 #define MACHINE "alpha" 51 #define _MACHINE_ARCH alpha 52 #define MACHINE_ARCH "alpha" 53 #define MID_MACHINE MID_ALPHA 54 55 #include <machine/alpha_cpu.h> 56 #include <machine/cpu.h> 57 58 /* 59 * Round p (pointer or byte index) up to a correctly-aligned value for all 60 * data types (int, long, ...). The result is u_long and must be cast to 61 * any desired pointer type. 62 * 63 * ALIGNED_POINTER is a boolean macro that checks whether an address 64 * is valid to fetch data elements of type t from on this architecture. 65 * This does not reflect the optimal alignment, just the possibility 66 * (within reasonable limits). 67 * 68 */ 69 #define ALIGNBYTES 7 70 #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES) 71 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 72 73 #define NBPG (1 << ALPHA_PGSHIFT) /* bytes/page */ 74 #define PGOFSET (NBPG-1) /* byte off. into pg */ 75 #define PGSHIFT ALPHA_PGSHIFT /* LOG2(NBPG) */ 76 77 #define PAGE_SHIFT 13 78 #define PAGE_SIZE (1 << PAGE_SHIFT) 79 #define PAGE_MASK (PAGE_SIZE - 1) 80 81 #define KERNBASE 0xfffffc0000230000 /* start of kernel virtual */ 82 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 83 84 #define DEV_BSIZE 512 85 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 86 #define BLKDEV_IOSIZE 2048 87 #ifndef MAXPHYS 88 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 89 #endif 90 91 #define SSIZE 1 /* initial stack size/NBPG */ 92 #define SINCR 1 /* increment of stack/NBPG */ 93 94 #define UPAGES 2 /* pages of u-area */ 95 #define USPACE (UPAGES * NBPG) /* total size of u-area */ 96 97 #ifndef MSGBUFSIZE 98 #define MSGBUFSIZE NBPG /* default message buffer size */ 99 #endif 100 101 /* 102 * Constants related to network buffer management. 103 * MCLBYTES must be no larger than NBPG (the software page size), and, 104 * on machines that exchange pages of input or output buffers with mbuf 105 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 106 * of the hardware page size. 107 */ 108 #define MSIZE 256 /* size of an mbuf */ 109 #ifndef MCLSHIFT 110 # define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 111 /* 2K cluster can hold Ether frame */ 112 #endif /* MCLSHIFT */ 113 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 114 #define MCLOFSET (MCLBYTES - 1) 115 #ifndef NMBCLUSTERS 116 117 #ifdef GATEWAY 118 #define NMBCLUSTERS 1024 /* map size, max cluster allocation */ 119 #else 120 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 121 #endif 122 #endif 123 124 /* 125 * Size of kernel malloc arena in CLBYTES-sized logical pages 126 */ 127 #ifndef NKMEMCLUSTERS 128 #define NKMEMCLUSTERS (32768*1024/NBPG) 129 #endif 130 131 132 /* pages ("clicks") to disk blocks */ 133 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 134 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 135 136 /* pages to bytes */ 137 #define ctob(x) ((x) << PGSHIFT) 138 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 139 140 /* bytes to disk blocks */ 141 #define btodb(x) ((x) >> DEV_BSHIFT) 142 #define dbtob(x) ((x) << DEV_BSHIFT) 143 144 /* 145 * Map a ``block device block'' to a file system block. 146 * This should be device dependent, and should use the bsize 147 * field from the disk label. 148 * For now though just use DEV_BSIZE. 149 */ 150 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 151 152 /* 153 * Mach derived conversion macros 154 */ 155 #define alpha_round_page(x) ((((unsigned long)(x)) + NBPG - 1) & ~(NBPG-1)) 156 #define alpha_trunc_page(x) ((unsigned long)(x) & ~(NBPG-1)) 157 #define alpha_btop(x) ((unsigned long)(x) >> PGSHIFT) 158 #define alpha_ptob(x) ((unsigned long)(x) << PGSHIFT) 159 160 #ifdef _KERNEL 161 #ifndef _LOCORE 162 163 #include <machine/intr.h> 164 165 void delay(unsigned long); 166 #define DELAY(n) delay(n) 167 168 /* XXX THE FOLLOWING PROTOTYPE BELONGS IN INTR.H */ 169 int spl0 __P((void)); /* drop ipl to zero */ 170 /* XXX END INTR.H */ 171 172 /* XXX THE FOLLOWING PROTOTYPE SHOULD BE A BUS.H INTERFACE */ 173 paddr_t alpha_XXX_dmamap(vaddr_t); 174 /* XXX END BUS.H */ 175 176 #endif 177 #endif /* !_KERNEL */ 178