168 lines
5.8 KiB
C
168 lines
5.8 KiB
C
/* $FreeBSD$ */
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/* From: NetBSD: param.h,v 1.20 1997/09/19 13:52:53 leo Exp */
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department and Ralph Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah $Hdr: machparam.h 1.11 89/08/14$
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*
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* @(#)param.h 8.1 (Berkeley) 6/10/93
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*/
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/*
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* Machine dependent constants for the Alpha.
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*/
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#ifndef _MACHINE
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#define _MACHINE alpha
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#endif
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#ifndef MACHINE
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#define MACHINE "alpha"
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#endif
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#ifndef _MACHINE_ARCH
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#define _MACHINE_ARCH alpha
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#endif
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#ifndef MACHINE_ARCH
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#define MACHINE_ARCH "alpha"
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#endif
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#define MID_MACHINE MID_ALPHA
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#include <machine/alpha_cpu.h>
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#include <machine/cpu.h>
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/*
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* OBJFORMAT_NAMES is a comma-separated list of the object formats
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* that are supported on the architecture.
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*/
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#define OBJFORMAT_NAMES "elf"
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#define OBJFORMAT_DEFAULT "elf"
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#define NCPUS 1
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/*
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* Round p (pointer or byte index) up to a correctly-aligned value for all
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* data types (int, long, ...). The result is u_long and must be cast to
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* any desired pointer type.
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*
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* ALIGNED_POINTER is a boolean macro that checks whether an address
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* is valid to fetch data elements of type t from on this architecture.
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* This does not reflect the optimal alignment, just the possibility
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* (within reasonable limits).
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*
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*/
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#define ALIGNBYTES 7
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#define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES)
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#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
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#define PAGE_SIZE (1 << ALPHA_PGSHIFT) /* bytes/page */
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#define PAGE_SHIFT ALPHA_PGSHIFT
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#define PAGE_MASK (PAGE_SIZE-1)
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#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t)))
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#define KERNBASE 0xfffffc0000300000LL /* start of kernel virtual */
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#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
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#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
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#define DEV_BSIZE (1<<DEV_BSHIFT)
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#ifndef BLKDEV_IOSIZE
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#define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */
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#endif
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#define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */
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#define MAXPHYS (128 * 1024) /* max raw I/O transfer size */
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#define CLSIZE 1
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#define CLSIZELOG2 0
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/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
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#define SSIZE 1 /* initial stack size/NBPG */
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#define SINCR 1 /* increment of stack/NBPG */
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#define UPAGES 2 /* pages of u-area */
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#define USPACE (UPAGES * PAGE_SIZE) /* total size of u-area */
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#ifndef MSGBUFSIZE
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#define MSGBUFSIZE PAGE_SIZE /* default message buffer size */
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#endif
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/*
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* Constants related to network buffer management.
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* MCLBYTES must be no larger than CLBYTES (the software page size), and,
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* on machines that exchange pages of input or output buffers with mbuf
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* clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
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* of the hardware page size.
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*/
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#define MSIZE 256 /* size of an mbuf */
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#ifndef MCLSHIFT
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# define MCLSHIFT 11 /* convert bytes to m_buf clusters */
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/* 2K cluster can hold Ether frame */
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#endif /* MCLSHIFT */
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#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
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#define MCLOFSET (MCLBYTES - 1)
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/*
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* Size of kernel malloc arena in CLBYTES-sized logical pages
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*/
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#ifndef NKMEMCLUSTERS
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#define NKMEMCLUSTERS (4096*1024/CLBYTES) /* XXX? */
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#endif
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/* pages ("clicks") to disk blocks */
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#define ctod(x) ((x) << (PAGE_SHIFT - DEV_BSHIFT))
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#define dtoc(x) ((x) >> (PAGE_SHIFT - DEV_BSHIFT))
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/* pages to bytes */
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#define ctob(x) ((x) << PAGE_SHIFT)
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#define btoc(x) (((x) + PAGE_MASK) >> PAGE_SHIFT)
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/* bytes to disk blocks */
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#define btodb(x) ((x) >> DEV_BSHIFT)
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#define dbtob(x) ((x) << DEV_BSHIFT)
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/*
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* Mach derived conversion macros
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*/
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#define round_page(x) ((((unsigned long)(x)) + PAGE_MASK) & ~(PAGE_MASK))
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#define trunc_page(x) ((unsigned long)(x) & ~(PAGE_MASK))
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#define atop(x) ((unsigned long)(x) >> PAGE_SHIFT)
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#define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT)
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#define alpha_btop(x) ((unsigned long)(x) >> PAGE_SHIFT)
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#define alpha_ptob(x) ((unsigned long)(x) << PAGE_SHIFT)
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#define pgtok(x) ((x) * (PAGE_SIZE / 1024))
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