Annotation of sys/arch/mips64/include/param.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: param.h,v 1.17 2007/05/28 21:02:49 thib 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: * from: @(#)param.h 8.1 (Berkeley) 6/10/93
! 38: */
! 39:
! 40: #ifndef _MIPS_PARAM_H_
! 41: #define _MIPS_PARAM_H_
! 42:
! 43: #ifdef _KERNEL
! 44: #ifdef _LOCORE
! 45: #include <machine/psl.h>
! 46: #else
! 47: #include <machine/cpu.h>
! 48: #endif
! 49: #endif
! 50:
! 51: /*
! 52: * Round p (pointer or byte index) up to a correctly-aligned value for all
! 53: * data types (int, long, ...). The result is u_int and must be cast to
! 54: * any desired pointer type.
! 55: */
! 56: #define ALIGNBYTES 7
! 57: #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES)
! 58: #define ALIGNED_POINTER(p, t) ((((u_long)(p)) & (sizeof (t) - 1)) == 0)
! 59:
! 60: #define NBPG 4096 /* bytes/page */
! 61: #define PGOFSET (NBPG-1) /* byte offset into page */
! 62: #define PGSHIFT 12 /* LOG2(NBPG) */
! 63:
! 64: #define PAGE_SHIFT 12
! 65: #define PAGE_SIZE (1 << PAGE_SHIFT)
! 66: #define PAGE_MASK (PAGE_SIZE - 1)
! 67:
! 68: #define NPTEPG (NBPG/4)
! 69:
! 70: #define NBSEG 0x400000 /* bytes/segment */
! 71: #define SEGOFSET (NBSEG-1) /* byte offset into segment */
! 72: #define SEGSHIFT 22 /* LOG2(NBSEG) */
! 73:
! 74: #ifdef __LP64__
! 75: #define KERNBASE 0xffffffff80000000L /* start of kernel virtual */
! 76: #else
! 77: #define KERNBASE 0x80000000 /* start of kernel virtual */
! 78: #endif
! 79:
! 80: #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
! 81: #define DEV_BSIZE (1 << DEV_BSHIFT)
! 82: #define BLKDEV_IOSIZE 2048
! 83: #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
! 84:
! 85: #ifdef __LP64__
! 86: #define UPAGES 4 /* pages of u-area */
! 87: #else
! 88: #define UPAGES 2 /* pages of u-area */
! 89: #endif
! 90:
! 91: #define USPACE (UPAGES*NBPG) /* size of u-area in bytes */
! 92: #define USPACE_ALIGN (2*NBPG) /* u-area alignment 0-none */
! 93:
! 94: /*
! 95: * Constants related to network buffer management.
! 96: */
! 97: #define NMBCLUSTERS 4096 /* map size, max cluster allocation */
! 98:
! 99: #define MSGBUFSIZE 8192
! 100:
! 101: /* Default malloc arena size */
! 102: #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT)
! 103: #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT)
! 104:
! 105: /* pages ("clicks") (4096 bytes) to disk blocks */
! 106: #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
! 107: #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
! 108:
! 109: /* pages to bytes */
! 110: #define ctob(x) ((x) << PGSHIFT)
! 111: #define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
! 112:
! 113: /* bytes to disk blocks */
! 114: #define btodb(x) ((x) >> DEV_BSHIFT)
! 115: #define dbtob(x) ((x) << DEV_BSHIFT)
! 116:
! 117: #ifdef _KERNEL
! 118: #ifndef _LOCORE
! 119:
! 120: #define DELAY(n) delay(n)
! 121: void delay(int);
! 122: void nanodelay(int);
! 123: #endif
! 124: #endif /* !_KERNEL */
! 125:
! 126: #endif /* !_MIPS_PARAM_H_ */
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