1 /* $OpenBSD: param.h,v 1.18 2011/09/08 03:40:32 guenther Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)param.h 5.8 (Berkeley) 6/28/91 35 */ 36 37 #ifdef _KERNEL 38 #ifdef _LOCORE 39 #include <machine/psl.h> 40 #else 41 #include <machine/cpu.h> 42 #endif 43 #endif 44 45 #define _MACHINE amd64 46 #define MACHINE "amd64" 47 #define _MACHINE_ARCH amd64 48 #define MACHINE_ARCH "amd64" 49 #define MID_MACHINE MID_AMD64 50 51 #define ALIGNBYTES _ALIGNBYTES 52 #define ALIGN(p) _ALIGN(p) 53 #define ALIGNED_POINTER(p,t) _ALIGNED_POINTER(p,t) 54 55 #define PGSHIFT 12 /* LOG2(NBPG) */ 56 #define NBPG (1 << PGSHIFT) /* bytes/page */ 57 #define PGOFSET (NBPG-1) /* byte offset into page */ 58 59 #define PAGE_SHIFT 12 60 #define PAGE_SIZE (1 << PAGE_SHIFT) 61 #define PAGE_MASK (PAGE_SIZE - 1) 62 63 #define NPTEPG (NBPG/(sizeof (pt_entry_t))) 64 65 #define KERNBASE 0xffffffff80000000 /* start of kernel virtual space */ 66 #define KERNTEXTOFF (KERNBASE+0x100000) /* start of kernel text */ 67 68 #define KERNTEXTOFF_HI 0xffffffff 69 #define KERNTEXTOFF_LO 0x80100000 70 71 #define KERNBASE_HI 0xffffffff 72 #define KERNBASE_LO 0x80000000 73 74 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 75 #define DEV_BSIZE (1 << DEV_BSHIFT) 76 #define BLKDEV_IOSIZE 2048 77 #ifndef MAXPHYS 78 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 79 #endif 80 81 #define UPAGES 5 /* pages of u-area */ 82 #define USPACE (UPAGES * NBPG) /* total size of u-area */ 83 #define USPACE_ALIGN (0) /* u-area alignment 0-none */ 84 85 #ifndef MSGBUFSIZE 86 #define MSGBUFSIZE 16*NBPG /* default message buffer size */ 87 #endif 88 89 /* 90 * Constants related to network buffer management. 91 */ 92 #define NMBCLUSTERS 6144 /* map size, max cluster allocation */ 93 94 /* 95 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 96 * logical pages. 97 */ 98 #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT) 99 #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 100 101 /* pages ("clicks") to disk blocks */ 102 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 103 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 104 105 /* bytes to disk blocks */ 106 #define dbtob(x) ((x) << DEV_BSHIFT) 107 #define btodb(x) ((x) >> DEV_BSHIFT) 108 109 /* 110 * Mach derived conversion macros 111 */ 112 #define x86_round_pdr(x) \ 113 ((((unsigned long)(x)) + (NBPD_L2 - 1)) & ~(NBPD_L2 - 1)) 114 #define x86_trunc_pdr(x) ((unsigned long)(x) & ~(NBPD_L2 - 1)) 115