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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.
* 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.
*/
/*
* 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).
*
*/
#ifndef _ALIGNBYTES
#define _ALIGNBYTES 7
#endif
#ifndef _ALIGN
#define _ALIGN(p) (((u_long)(p) + _ALIGNBYTES) &~ _ALIGNBYTES)
#endif
#ifndef _ALIGNED_POINTER
#define _ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
#endif
#ifndef _MACHINE
#define _MACHINE alpha
#endif
#ifndef _MACHINE_ARCH
#define _MACHINE_ARCH alpha
#endif
#ifndef _NO_NAMESPACE_POLLUTION
#ifndef _MACHINE_PARAM_H_
#define _MACHINE_PARAM_H_
#ifndef MACHINE
#define MACHINE "alpha"
#endif
#ifndef MACHINE_ARCH
#define MACHINE_ARCH "alpha"
#endif
#define MID_MACHINE MID_ALPHA
#include <machine/alpha_cpu.h>
#include <machine/cpu.h>
#define MAXSMPCPU 8
#ifdef SMP
#define MAXCPU MAXSMPCPU
#else
#define MAXCPU 1
#endif
#define ALIGNBYTES _ALIGNBYTES
#define ALIGN(p) _ALIGN(p)
#define ALIGNED_POINTER(p,t) _ALIGNED_POINTER(p,t)
#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 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 */
#ifndef KSTACK_PAGES
#define KSTACK_PAGES 2 /* pages of kstack (with pcb) */
#endif
#define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */
/*
* 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))
#endif /* !_MACHINE_PARAM_H_ */
#endif /* !_NO_NAMESPACE_POLLUTION */
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