14Srgrimes/*- 24Srgrimes * Copyright (c) 1990 The Regents of the University of California. 34Srgrimes * All rights reserved. 44Srgrimes * 54Srgrimes * This code is derived from software contributed to Berkeley by 64Srgrimes * William Jolitz. 74Srgrimes * 84Srgrimes * Redistribution and use in source and binary forms, with or without 94Srgrimes * modification, are permitted provided that the following conditions 104Srgrimes * are met: 114Srgrimes * 1. Redistributions of source code must retain the above copyright 124Srgrimes * notice, this list of conditions and the following disclaimer. 134Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 144Srgrimes * notice, this list of conditions and the following disclaimer in the 154Srgrimes * documentation and/or other materials provided with the distribution. 164Srgrimes * 4. Neither the name of the University nor the names of its contributors 174Srgrimes * may be used to endorse or promote products derived from this software 184Srgrimes * without specific prior written permission. 194Srgrimes * 204Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 214Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 224Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 234Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 244Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 254Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 264Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 274Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 284Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 294Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 304Srgrimes * SUCH DAMAGE. 314Srgrimes * 32551Srgrimes * from: @(#)param.h 5.8 (Berkeley) 6/28/91 3350477Speter * $FreeBSD$ 344Srgrimes */ 354Srgrimes 36196994Sphk#include <machine/_align.h> 37196994Sphk 38196994Sphk#ifndef _I386_INCLUDE_PARAM_H_ 39196994Sphk#define _I386_INCLUDE_PARAM_H_ 40196994Sphk 414Srgrimes/* 424Srgrimes * Machine dependent constants for Intel 386. 434Srgrimes */ 4468498Sasmodai 4568498Sasmodai/* 4668498Sasmodai * Round p (pointer or byte index) up to a correctly-aligned value 4768498Sasmodai * for all data types (int, long, ...). The result is unsigned int 4868498Sasmodai * and must be cast to any desired pointer type. 4968498Sasmodai */ 5068498Sasmodai#ifndef _ALIGNBYTES 5168498Sasmodai#define _ALIGNBYTES (sizeof(int) - 1) 5268498Sasmodai#endif 5368498Sasmodai#ifndef _ALIGN 5468498Sasmodai#define _ALIGN(p) (((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES) 5568498Sasmodai#endif 5668498Sasmodai 5768498Sasmodai 58154128Simp#define __HAVE_ACPI 59223440Sjhb#define __HAVE_PIR 60154128Simp#define __PCI_REROUTE_INTERRUPT 61154128Simp 6244364Simp#ifndef MACHINE 63551Srgrimes#define MACHINE "i386" 6444364Simp#endif 6544364Simp#ifndef MACHINE_ARCH 6638673Skato#define MACHINE_ARCH "i386" 6744364Simp#endif 6836977Sbde#define MID_MACHINE MID_I386 6936977Sbde 70177661Sjb#if defined(SMP) || defined(KLD_MODULE) 71224207Sattilio#ifndef MAXCPU 72183525Sjhb#define MAXCPU 32 73224207Sattilio#endif 7428354Sfsmp#else 7566296Sps#define MAXCPU 1 76177661Sjb#endif /* SMP || KLD_MODULE */ 774Srgrimes 7868498Sasmodai#define ALIGNBYTES _ALIGNBYTES 7968498Sasmodai#define ALIGN(p) _ALIGN(p) 80195376Ssam/* 81195376Ssam * ALIGNED_POINTER is a boolean macro that checks whether an address 82195376Ssam * is valid to fetch data elements of type t from on this architecture. 83195376Ssam * This does not reflect the optimal alignment, just the possibility 84195376Ssam * (within reasonable limits). 85195376Ssam */ 86195376Ssam#define ALIGNED_POINTER(p, t) 1 874Srgrimes 88191278Srwatson/* 89191278Srwatson * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 90191278Srwatson * architecture. It should be used with appropriate caution. 91191278Srwatson */ 92192331Sjhb#define CACHE_LINE_SHIFT 7 93191276Srwatson#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 94191276Srwatson 9515543Sphk#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 9615565Sphk#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 971045Sdg#define PAGE_MASK (PAGE_SIZE-1) 9815543Sphk#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 9915565Sphk 100112841Sjake#ifdef PAE 101112841Sjake#define NPGPTD 4 102112841Sjake#define PDRSHIFT 21 /* LOG2(NBPDR) */ 103183343Skmacy#define NPGPTD_SHIFT 9 104112841Sjake#else 105111363Sjake#define NPGPTD 1 106111363Sjake#define PDRSHIFT 22 /* LOG2(NBPDR) */ 107183343Skmacy#define NPGPTD_SHIFT 10 108112841Sjake#endif 109111363Sjake 110111363Sjake#define NBPTD (NPGPTD<<PAGE_SHIFT) 111111363Sjake#define NPDEPTD (NBPTD/(sizeof (pd_entry_t))) 11215543Sphk#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 11315565Sphk#define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ 11427950Sdyson#define PDRMASK (NBPDR-1) 1154Srgrimes 116197316Salc#define MAXPAGESIZES 2 /* maximum number of supported page sizes */ 117197316Salc 11827993Sdyson#define IOPAGES 2 /* pages of i/o permission bitmap */ 11982309Speter 12083366Sjulian#ifndef KSTACK_PAGES 12183366Sjulian#define KSTACK_PAGES 2 /* Includes pcb! */ 12282309Speter#endif 123116355Salc#define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */ 1244Srgrimes 1254Srgrimes/* 126102738Sdillon * Ceiling on amount of swblock kva space, can be changed via 127102738Sdillon * the kern.maxswzone /boot/loader.conf variable. 128240097Sdes * 129240097Sdes * 276 is sizeof(struct swblock), but we do not always have a definition 130240097Sdes * in scope for struct swblock, so we have to hardcode it. Each struct 131240097Sdes * swblock holds metadata for 32 pages, so in theory, this is enough for 132240097Sdes * 16 GB of swap. In practice, however, the usable amount is considerably 133240097Sdes * lower due to fragmentation. 13481933Sdillon */ 13581933Sdillon#ifndef VM_SWZONE_SIZE_MAX 136240097Sdes#define VM_SWZONE_SIZE_MAX (276 * 128 * 1024) 13781933Sdillon#endif 13881933Sdillon 13981933Sdillon/* 14081933Sdillon * Ceiling on size of buffer cache (really only effects write queueing, 141102738Sdillon * the VM page cache is not effected), can be changed via 142102738Sdillon * the kern.maxbcache /boot/loader.conf variable. 143251897Sscottl * 144251897Sscottl * The value is equal to the size of the auto-tuned buffer map for 145251897Sscottl * the machine with 4GB of RAM, see vfs_bio.c:kern_vfs_bio_buffer_alloc(). 14681933Sdillon */ 14781933Sdillon#ifndef VM_BCACHE_SIZE_MAX 148251897Sscottl#define VM_BCACHE_SIZE_MAX (7224 * 16 * 1024) 14981933Sdillon#endif 15081933Sdillon 15181933Sdillon/* 1524Srgrimes * Mach derived conversion macros 1534Srgrimes */ 15440286Sdg#define trunc_page(x) ((x) & ~PAGE_MASK) 15540286Sdg#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 156112569Sjake#define trunc_4mpage(x) ((x) & ~PDRMASK) 157112569Sjake#define round_4mpage(x) ((((x)) + PDRMASK) & ~PDRMASK) 1581549Srgrimes 159112569Sjake#define atop(x) ((x) >> PAGE_SHIFT) 160112569Sjake#define ptoa(x) ((x) << PAGE_SHIFT) 1611045Sdg 162112569Sjake#define i386_btop(x) ((x) >> PAGE_SHIFT) 163112569Sjake#define i386_ptob(x) ((x) << PAGE_SHIFT) 164584Srgrimes 16544157Sluoqi#define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 16644157Sluoqi 167196994Sphk#endif /* !_I386_INCLUDE_PARAM_H_ */ 168