1 /* $NetBSD: param.h,v 1.38 2011/02/08 20:20:07 rmind 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. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: Utah $Hdr: machparam.h 1.11 89/08/14$ 37 * 38 * @(#)param.h 8.1 (Berkeley) 6/10/93 39 */ 40 41 /* 42 * Machine dependent constants for the Alpha. 43 */ 44 #define _MACHINE alpha 45 #define MACHINE "alpha" 46 #define _MACHINE_ARCH alpha 47 #define MACHINE_ARCH "alpha" 48 #define MID_MACHINE MID_ALPHA 49 50 #include <machine/cpu.h> 51 52 /* 53 * Round p (pointer or byte index) up to a correctly-aligned value for all 54 * data types (int, long, ...). The result is u_long and must be cast to 55 * any desired pointer type. 56 * 57 * ALIGNED_POINTER is a boolean macro that checks whether an address 58 * is valid to fetch data elements of type t from on this architecture. 59 * This does not reflect the optimal alignment, just the possibility 60 * (within reasonable limits). 61 * 62 */ 63 #define ALIGNBYTES 7 64 #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES) 65 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 66 67 #define NBPG (1 << ALPHA_PGSHIFT) /* bytes/page */ 68 #define PGOFSET (NBPG-1) /* byte off. into pg */ 69 #define PGSHIFT ALPHA_PGSHIFT /* LOG2(NBPG) */ 70 71 #define KERNBASE 0xfffffc0000230000 /* start of kernel virtual */ 72 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 73 74 #define DEV_BSIZE 512 75 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 76 #define BLKDEV_IOSIZE 2048 77 #ifndef MAXPHYS 78 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 79 #endif 80 81 #define SSIZE 1 /* initial stack size/NBPG */ 82 #define SINCR 1 /* increment of stack/NBPG */ 83 84 #define UPAGES 2 /* pages of u-area */ 85 #define USPACE (UPAGES * NBPG) /* total size of u-area */ 86 87 #ifndef MSGBUFSIZE 88 #define MSGBUFSIZE NBPG /* default message buffer size */ 89 #endif 90 91 /* 92 * Constants related to network buffer management. 93 * MCLBYTES must be no larger than NBPG (the software page size), and, 94 * on machines that exchange pages of input or output buffers with mbuf 95 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 96 * of the hardware page size. 97 */ 98 #define MSIZE 256 /* size of an mbuf */ 99 100 #ifndef MCLSHIFT 101 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 102 /* 2K cluster can hold Ether frame */ 103 #endif /* MCLSHIFT */ 104 105 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 106 107 /* 108 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 109 * logical pages. 110 */ 111 #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT) 112 #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 113 114 /* 115 * Mach derived conversion macros 116 */ 117 #define alpha_round_page(x) ((((unsigned long)(x)) + NBPG - 1) & ~(NBPG-1)) 118 #define alpha_trunc_page(x) ((unsigned long)(x) & ~(NBPG-1)) 119 #define alpha_btop(x) ((unsigned long)(x) >> PGSHIFT) 120 #define alpha_ptob(x) ((unsigned long)(x) << PGSHIFT) 121 122 #ifdef _KERNEL 123 #ifndef _LOCORE 124 125 #include <machine/intr.h> 126 127 void delay(unsigned long); 128 #define DELAY(n) delay(n) 129 130 /* XXX THE FOLLOWING PROTOTYPE SHOULD BE A BUS.H INTERFACE */ 131 paddr_t alpha_XXX_dmamap(vaddr_t); 132 /* XXX END BUS.H */ 133 134 #endif 135 #endif /* !_KERNEL */ 136