Annotation of sys/arch/vax/include/param.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: param.h,v 1.33 2007/05/28 21:02:49 thib Exp $ */
! 2: /* $NetBSD: param.h,v 1.39 1999/10/22 21:14:34 ragge Exp $ */
! 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: #ifndef _VAX_PARAM_H_
! 38: #define _VAX_PARAM_H_
! 39:
! 40: /*
! 41: * Machine dependent constants for VAX.
! 42: */
! 43:
! 44: #define _MACHINE vax
! 45: #define MACHINE "vax"
! 46: #define _MACHINE_ARCH vax
! 47: #define MACHINE_ARCH "vax"
! 48: #define MID_MACHINE MID_VAX
! 49:
! 50: /*
! 51: * Round p (pointer or byte index) up to a correctly-aligned value
! 52: * for all data types (int, long, ...). The result is u_int and
! 53: * must be cast to any desired pointer type.
! 54: *
! 55: * ALIGNED_POINTER is a boolean macro that checks whether an address
! 56: * is valid to fetch data elements of type t from on this architecture.
! 57: * This does not reflect the optimal alignment, just the possibility
! 58: * (within reasonable limits).
! 59: *
! 60: */
! 61:
! 62: #define ALIGNBYTES (sizeof(int) - 1)
! 63: #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
! 64: #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
! 65:
! 66: #define PGSHIFT 12 /* LOG2(NBPG) */
! 67: #define NBPG (1 << PGSHIFT) /* (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 VAX_PGSHIFT 9
! 75: #define VAX_NBPG (1 << VAX_PGSHIFT)
! 76: #define VAX_PGOFSET (VAX_NBPG - 1)
! 77: #define VAX_NPTEPG (VAX_NBPG / 4)
! 78:
! 79: #define KERNBASE 0x80000000 /* start of kernel virtual */
! 80:
! 81: #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
! 82: #define DEV_BSIZE (1 << DEV_BSHIFT)
! 83:
! 84: #define BLKDEV_IOSIZE 2048
! 85: #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
! 86: #define MAXBSIZE 0x4000 /* max FS block size - XXX */
! 87:
! 88: #define UPAGES 2 /* pages of u-area */
! 89: #define USPACE (NBPG*UPAGES)
! 90: #define USPACE_ALIGN (0) /* u-area alignment 0-none */
! 91: #define REDZONEADDR (VAX_NBPG*3) /* Must be > sizeof(struct user) */
! 92:
! 93: #ifndef MSGBUFSIZE
! 94: #define MSGBUFSIZE 8192 /* default message buffer size */
! 95: #endif
! 96:
! 97: /*
! 98: * Constants related to network buffer management.
! 99: */
! 100: #define NMBCLUSTERS 768 /* map size, max cluster allocation */
! 101:
! 102: /*
! 103: * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
! 104: * logical pages.
! 105: */
! 106: #define NKMEMPAGES_MIN_DEFAULT ((4 * 1024 * 1024) >> PAGE_SHIFT)
! 107: #define NKMEMPAGES_MAX_DEFAULT ((4 * 1024 * 1024) >> PAGE_SHIFT)
! 108:
! 109: /*
! 110: * Some macros for units conversion
! 111: */
! 112:
! 113: /* pages ("clicks") to disk blocks */
! 114: #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
! 115: #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
! 116:
! 117: /* clicks to bytes */
! 118: #define ctob(x) ((x) << PGSHIFT)
! 119: #define btoc(x) (((unsigned)(x) + PGOFSET) >> PGSHIFT)
! 120:
! 121: /* bytes to disk blocks */
! 122: #define btodb(x) ((x) >> DEV_BSHIFT)
! 123: #define dbtob(x) ((x) << DEV_BSHIFT)
! 124:
! 125: /* MD conversion macros */
! 126: #define vax_btoc(x) (((unsigned)(x) + VAX_PGOFSET) >> VAX_PGSHIFT)
! 127: #define vax_btop(x) (((unsigned)(x)) >> VAX_PGSHIFT)
! 128:
! 129: #define ovbcopy(x,y,z) bcopy(x, y, z)
! 130:
! 131: #ifdef _KERNEL
! 132:
! 133: #include <machine/intr.h>
! 134:
! 135: /* Prototype needed for delay() */
! 136: #ifndef _LOCORE
! 137: #include <machine/cpu.h>
! 138:
! 139: void delay(int);
! 140: /* inline macros used inside kernel */
! 141: #include <machine/macros.h>
! 142: #endif
! 143:
! 144: #define DELAY(x) delay(x)
! 145: #endif /* _KERNEL */
! 146:
! 147: #endif /* _VAX_PARAM_H_ */
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