Annotation of sys/arch/amd64/include/param.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: param.h,v 1.14 2007/05/28 21:02:49 thib 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: /*
! 52: * Round p (pointer or byte index) up to a correctly-aligned value
! 53: * for all data types (int, long, ...). The result is u_long and
! 54: * must be cast to any desired pointer type.
! 55: *
! 56: * ALIGNED_POINTER is a boolean macro that checks whether an address
! 57: * is valid to fetch data elements of type t from on this architecture.
! 58: * This does not reflect the optimal alignment, just the possibility
! 59: * (within reasonable limits).
! 60: *
! 61: */
! 62: #define ALIGNBYTES (sizeof(long) - 1)
! 63: #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ALIGNBYTES)
! 64: #define ALIGNED_POINTER(p,t) 1
! 65:
! 66: #define PGSHIFT 12 /* LOG2(NBPG) */
! 67: #define NBPG (1 << PGSHIFT) /* bytes/page */
! 68: #define PGOFSET (NBPG-1) /* byte offset into page */
! 69:
! 70: #define PAGE_SHIFT 12
! 71: #define PAGE_SIZE (1 << PAGE_SHIFT)
! 72: #define PAGE_MASK (PAGE_SIZE - 1)
! 73:
! 74: #define NPTEPG (NBPG/(sizeof (pt_entry_t)))
! 75:
! 76: #define KERNBASE 0xffffffff80000000 /* start of kernel virtual space */
! 77: #define KERNTEXTOFF (KERNBASE+0x100000) /* start of kernel text */
! 78:
! 79: #define KERNTEXTOFF_HI 0xffffffff
! 80: #define KERNTEXTOFF_LO 0x80100000
! 81:
! 82: #define KERNBASE_HI 0xffffffff
! 83: #define KERNBASE_LO 0x80000000
! 84:
! 85: #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
! 86: #define DEV_BSIZE (1 << DEV_BSHIFT)
! 87: #define BLKDEV_IOSIZE 2048
! 88: #ifndef MAXPHYS
! 89: #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
! 90: #endif
! 91:
! 92: #define UPAGES 5 /* pages of u-area */
! 93: #define USPACE (UPAGES * NBPG) /* total size of u-area */
! 94: #define USPACE_ALIGN (0) /* u-area alignment 0-none */
! 95:
! 96: #ifndef MSGBUFSIZE
! 97: #define MSGBUFSIZE 4*NBPG /* default message buffer size */
! 98: #endif
! 99:
! 100: /*
! 101: * Constants related to network buffer management.
! 102: */
! 103: #define NMBCLUSTERS 6144 /* map size, max cluster allocation */
! 104:
! 105: /*
! 106: * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
! 107: * logical pages.
! 108: */
! 109: #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT)
! 110: #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT)
! 111:
! 112: /* pages ("clicks") to disk blocks */
! 113: #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
! 114: #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
! 115:
! 116: /* bytes to pages */
! 117: #define ctob(x) ((x) << PGSHIFT)
! 118: #define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
! 119:
! 120: /* bytes to disk blocks */
! 121: #define dbtob(x) ((x) << DEV_BSHIFT)
! 122: #define btodb(x) ((x) >> DEV_BSHIFT)
! 123:
! 124: /*
! 125: * Mach derived conversion macros
! 126: */
! 127: #define x86_round_pdr(x) \
! 128: ((((unsigned long)(x)) + (NBPD_L2 - 1)) & ~(NBPD_L2 - 1))
! 129: #define x86_trunc_pdr(x) ((unsigned long)(x) & ~(NBPD_L2 - 1))
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