Annotation of sys/arch/alpha/include/param.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: param.h,v 1.32 2007/05/28 21:02:49 thib Exp $ */
! 2: /* $NetBSD: param.h,v 1.30 2000/06/09 16:03:04 thorpej Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1988 University of Utah.
! 6: * Copyright (c) 1992, 1993
! 7: * The Regents of the University of California. All rights reserved.
! 8: *
! 9: * This code is derived from software contributed to Berkeley by
! 10: * the Systems Programming Group of the University of Utah Computer
! 11: * Science Department and Ralph Campbell.
! 12: *
! 13: * Redistribution and use in source and binary forms, with or without
! 14: * modification, are permitted provided that the following conditions
! 15: * are met:
! 16: * 1. Redistributions of source code must retain the above copyright
! 17: * notice, this list of conditions and the following disclaimer.
! 18: * 2. Redistributions in binary form must reproduce the above copyright
! 19: * notice, this list of conditions and the following disclaimer in the
! 20: * documentation and/or other materials provided with the distribution.
! 21: * 3. Neither the name of the University nor the names of its contributors
! 22: * may be used to endorse or promote products derived from this software
! 23: * without specific prior written permission.
! 24: *
! 25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 35: * SUCH DAMAGE.
! 36: *
! 37: * from: Utah $Hdr: machparam.h 1.11 89/08/14$
! 38: *
! 39: * @(#)param.h 8.1 (Berkeley) 6/10/93
! 40: */
! 41:
! 42: /*
! 43: * Machine dependent constants for the Alpha.
! 44: */
! 45: #define _MACHINE alpha
! 46: #define MACHINE "alpha"
! 47: #define _MACHINE_ARCH alpha
! 48: #define MACHINE_ARCH "alpha"
! 49: #define MID_MACHINE MID_ALPHA
! 50:
! 51: #include <machine/alpha_cpu.h>
! 52: #include <machine/cpu.h>
! 53:
! 54: /*
! 55: * Round p (pointer or byte index) up to a correctly-aligned value for all
! 56: * data types (int, long, ...). The result is u_long and must be cast to
! 57: * any desired pointer type.
! 58: *
! 59: * ALIGNED_POINTER is a boolean macro that checks whether an address
! 60: * is valid to fetch data elements of type t from on this architecture.
! 61: * This does not reflect the optimal alignment, just the possibility
! 62: * (within reasonable limits).
! 63: *
! 64: */
! 65: #define ALIGNBYTES 7
! 66: #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES)
! 67: #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
! 68:
! 69: #define NBPG (1 << ALPHA_PGSHIFT) /* bytes/page */
! 70: #define PGOFSET (NBPG-1) /* byte off. into pg */
! 71: #define PGSHIFT ALPHA_PGSHIFT /* LOG2(NBPG) */
! 72:
! 73: #define PAGE_SHIFT 13
! 74: #define PAGE_SIZE (1 << PAGE_SHIFT)
! 75: #define PAGE_MASK (PAGE_SIZE - 1)
! 76:
! 77: #define KERNBASE 0xfffffc0000230000 /* start of kernel virtual */
! 78:
! 79: #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
! 80: #define DEV_BSIZE (1 << DEV_BSHIFT)
! 81: #define BLKDEV_IOSIZE 2048
! 82: #ifndef MAXPHYS
! 83: #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
! 84: #endif
! 85:
! 86: #define UPAGES 2 /* pages of u-area */
! 87: #define USPACE (UPAGES * NBPG) /* total size of u-area */
! 88: #define USPACE_ALIGN (0) /* u-area alignment 0-none */
! 89:
! 90: #ifndef MSGBUFSIZE
! 91: #define MSGBUFSIZE NBPG /* default message buffer size */
! 92: #endif
! 93:
! 94: /*
! 95: * Constants related to network buffer management.
! 96: */
! 97: #define NMBCLUSTERS 4096 /* map size, max cluster allocation */
! 98:
! 99:
! 100: /*
! 101: * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
! 102: * logical pages.
! 103: */
! 104: #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT)
! 105: #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT)
! 106:
! 107: /* pages ("clicks") to disk blocks */
! 108: #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
! 109: #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
! 110:
! 111: /* pages to bytes */
! 112: #define ctob(x) ((x) << PGSHIFT)
! 113: #define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
! 114:
! 115: /* bytes to disk blocks */
! 116: #define btodb(x) ((x) >> DEV_BSHIFT)
! 117: #define dbtob(x) ((x) << DEV_BSHIFT)
! 118:
! 119: #ifdef _KERNEL
! 120: #ifndef _LOCORE
! 121:
! 122: #include <machine/intr.h>
! 123:
! 124: void delay(unsigned long);
! 125: #define DELAY(n) delay(n)
! 126:
! 127: /* XXX THE FOLLOWING PROTOTYPE BELONGS IN INTR.H */
! 128: int spl0(void); /* drop ipl to zero */
! 129: /* XXX END INTR.H */
! 130:
! 131: /* XXX THE FOLLOWING PROTOTYPE SHOULD BE A BUS.H INTERFACE */
! 132: paddr_t alpha_XXX_dmamap(vaddr_t);
! 133: /* XXX END BUS.H */
! 134:
! 135: #endif
! 136: #endif /* !_KERNEL */
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