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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* 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: @(#)param.h 5.8 (Berkeley) 6/28/91
* $FreeBSD$
*/
#ifndef _I386_INCLUDE_PARAM_H_
#define _I386_INCLUDE_PARAM_H_
#include <machine/_align.h>
/*
* Machine dependent constants for Intel 386.
*/
#define __HAVE_ACPI
#define __HAVE_PIR
#define __PCI_REROUTE_INTERRUPT
#ifndef MACHINE
#define MACHINE "i386"
#endif
#ifndef MACHINE_ARCH
#define MACHINE_ARCH "i386"
#endif
#define MID_MACHINE MID_I386
#if defined(SMP) || defined(KLD_MODULE)
#ifndef MAXCPU
#define MAXCPU 32
#endif
#else
#define MAXCPU 1
#endif /* SMP || KLD_MODULE */
#ifndef MAXMEMDOM
#define MAXMEMDOM 1
#endif
#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) 1
/*
* 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 7
#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT)
#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)))
#ifdef PAE
#define NPGPTD 4
#define PDRSHIFT 21 /* LOG2(NBPDR) */
#define NPGPTD_SHIFT 9
#else
#define NPGPTD 1
#define PDRSHIFT 22 /* LOG2(NBPDR) */
#define NPGPTD_SHIFT 10
#endif
#define NBPTD (NPGPTD<<PAGE_SHIFT)
#define NPDEPTD (NBPTD/(sizeof (pd_entry_t)))
#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t)))
#define NBPDR (1<<PDRSHIFT) /* bytes/page dir */
#define PDRMASK (NBPDR-1)
#define MAXPAGESIZES 2 /* maximum number of supported page sizes */
#define IOPAGES 2 /* pages of i/o permission bitmap */
#ifndef KSTACK_PAGES
#define KSTACK_PAGES 2 /* Includes pcb! */
#endif
#define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */
/*
* Ceiling on amount of swblock kva space, can be changed via
* the kern.maxswzone /boot/loader.conf variable.
*
* 276 is sizeof(struct swblock), but we do not always have a definition
* in scope for struct swblock, so we have to hardcode it. Each struct
* swblock holds metadata for 32 pages, so in theory, this is enough for
* 16 GB of swap. In practice, however, the usable amount is considerably
* lower due to fragmentation.
*/
#ifndef VM_SWZONE_SIZE_MAX
#define VM_SWZONE_SIZE_MAX (276 * 128 * 1024)
#endif
/*
* Ceiling on size of buffer cache (really only effects write queueing,
* the VM page cache is not effected), can be changed via
* the kern.maxbcache /boot/loader.conf variable.
*
* The value is equal to the size of the auto-tuned buffer map for
* the machine with 4GB of RAM, see vfs_bio.c:kern_vfs_bio_buffer_alloc().
*/
#ifndef VM_BCACHE_SIZE_MAX
#define VM_BCACHE_SIZE_MAX (7224 * 16 * 1024)
#endif
/*
* Mach derived conversion macros
*/
#define trunc_page(x) ((x) & ~PAGE_MASK)
#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK)
#define trunc_4mpage(x) ((x) & ~PDRMASK)
#define round_4mpage(x) ((((x)) + PDRMASK) & ~PDRMASK)
#define atop(x) ((x) >> PAGE_SHIFT)
#define ptoa(x) ((x) << PAGE_SHIFT)
#define i386_btop(x) ((x) >> PAGE_SHIFT)
#define i386_ptob(x) ((x) << PAGE_SHIFT)
#define pgtok(x) ((x) * (PAGE_SIZE / 1024))
#endif /* !_I386_INCLUDE_PARAM_H_ */
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