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/* $OpenBSD: param.h,v 1.11 1998/08/30 22:05:35 millert 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
* from: @(#)param.h 8.1 (Berkeley) 6/10/93
* JNPR: param.h,v 1.6.2.1 2007/09/10 07:49:36 girish
* $FreeBSD$
*/
#ifndef _MACHINE_PARAM_H_
#define _MACHINE_PARAM_H_
#include <sys/cdefs.h>
#ifdef _KERNEL
#ifdef _LOCORE
#include <machine/psl.h>
#else
#include <machine/cpu.h>
#endif
#endif
#define __PCI_REROUTE_INTERRUPT
#ifndef MACHINE
#define MACHINE "mips"
#endif
#ifndef MACHINE_ARCH
#define MACHINE_ARCH "mips"
#endif
/*
* 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 MID_MACHINE 0 /* None but has to be defined */
#ifdef SMP
#define MAXSMPCPU 16
#define MAXCPU MAXSMPCPU
#else
#define MAXSMPCPU 1
#define MAXCPU 1
#endif
/*
* Round p (pointer or byte index) up to a correctly-aligned value for all
* data types (int, long, ...). The result is u_int and must be cast to
* any desired pointer type.
*/
#define _ALIGNBYTES 7
#define _ALIGN(p) (((u_int)(p) + _ALIGNBYTES) &~ _ALIGNBYTES)
#define ALIGNBYTES _ALIGNBYTES
#define ALIGN(p) _ALIGN(p)
/*
* 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 ALIGNED_POINTER(p, t) ((((unsigned)(p)) & (sizeof (t) - 1)) == 0)
/*
* CACHE_LINE_SIZE is the compile-time maximum cache line size for an
* architecture. It should be used with appropriate caution.
*/
#define CACHE_LINE_SHIFT 6
#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT)
#define NBPG 4096 /* bytes/page */
#define PGOFSET (NBPG-1) /* byte offset into page */
#define PGSHIFT 12 /* LOG2(NBPG) */
#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */
#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */
#define PAGE_MASK (PAGE_SIZE-1)
#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t)))
#define NBSEG 0x400000 /* bytes/segment */
#define SEGOFSET (NBSEG-1) /* byte offset into segment */
#define SEGSHIFT 22 /* LOG2(NBSEG) */
/* XXXimp: This has moved to vmparam.h */
/* Also, this differs from the mips2 definition, but likely is better */
/* since this means the kernel won't chew up TLBs when it is executing */
/* code */
#define KERNBASE 0x80000000 /* start of kernel virtual */
#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
#define BLKDEV_IOSIZE 2048 /* xxx: Why is this 1/2 page? */
#define MAXDUMPPGS 1 /* xxx: why is this only one? */
/*
* NOTE: In FreeBSD, Uarea's don't have a fixed address.
* Therefore, any code imported from OpenBSD which depends on
* UADDR, UVPN and KERNELSTACK requires porting.
* XXX: 3 stack pages? Not 4 which would be more efficient from a tlb
* XXX: point of view.
*/
#define KSTACK_PAGES 3 /* kernel stack*/
#define KSTACK_GUARD_PAGES 0 /* pages of kstack guard; 0 disables */
#define UPAGES 2
/* pages ("clicks") (4096 bytes) to disk blocks */
#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
/*
* Map a ``block device block'' to a file system block.
* This should be device dependent, and should use the bsize
* field from the disk label.
* For now though just use DEV_BSIZE.
*/
#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
/*
* Conversion macros
*/
#define mips_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
#define mips_trunc_page(x) ((unsigned)(x) & ~(NBPG-1))
#define mips_btop(x) ((unsigned)(x) >> PGSHIFT)
#define mips_ptob(x) ((unsigned)(x) << PGSHIFT)
#define round_page mips_round_page
#define trunc_page mips_trunc_page
#define atop(x) ((unsigned long)(x) >> PAGE_SHIFT)
#define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT)
#define pgtok(x) ((x) * (PAGE_SIZE / 1024))
#ifndef _KERNEL
#define DELAY(n) { register int N = (n); while (--N > 0); }
#endif /* !_KERNEL */
#endif /* !_MACHINE_PARAM_H_ */
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