166 lines
5.2 KiB
C
166 lines
5.2 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* 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.
|
|
* 3. 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
|
|
|
|
#ifdef SMP
|
|
#ifndef MAXCPU
|
|
#define MAXCPU 32
|
|
#endif
|
|
#else
|
|
#define MAXCPU 1
|
|
#endif
|
|
|
|
#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 6
|
|
#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))
|
|
|
|
/* Size in bytes of the page directory */
|
|
#define NBPTD (NPGPTD << PAGE_SHIFT)
|
|
/* Number of PDEs in page directory, 2048 for PAE, 1024 for non-PAE */
|
|
#define NPDEPTD (NBPTD / sizeof(pd_entry_t))
|
|
/* Number of PDEs in one page of the page directory, 512 vs. 1024 */
|
|
#define NPDEPG (PAGE_SIZE / sizeof(pd_entry_t))
|
|
#define PDRMASK (NBPDR - 1)
|
|
#ifndef PDRSHIFT
|
|
#define PDRSHIFT i386_pmap_PDRSHIFT
|
|
#endif
|
|
#ifndef NBPDR
|
|
#define NBPDR (1 << PDRSHIFT) /* bytes/page dir */
|
|
#endif
|
|
|
|
#define MAXPAGESIZES 2 /* maximum number of supported page sizes */
|
|
|
|
#define IOPAGES 2 /* pages of i/o permission bitmap */
|
|
|
|
#ifndef KSTACK_PAGES
|
|
#define KSTACK_PAGES 4 /* Includes pcb! */
|
|
#endif
|
|
#define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */
|
|
#if KSTACK_PAGES < 4
|
|
#define TD0_KSTACK_PAGES 4
|
|
#else
|
|
#define TD0_KSTACK_PAGES KSTACK_PAGES
|
|
#endif
|
|
|
|
/*
|
|
* 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))
|
|
|
|
#define INKERNEL(va) (TRUE)
|
|
|
|
#endif /* !_I386_INCLUDE_PARAM_H_ */
|