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