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: releng/11.0/sys/i386/include/param.h 286288 2015-08-04 13:50:52Z kib $ 344Srgrimes */ 354Srgrimes 36196994Sphk 37196994Sphk#ifndef _I386_INCLUDE_PARAM_H_ 38196994Sphk#define _I386_INCLUDE_PARAM_H_ 39196994Sphk 40249722Stijl#include <machine/_align.h> 41249722Stijl 424Srgrimes/* 434Srgrimes * Machine dependent constants for Intel 386. 444Srgrimes */ 4568498Sasmodai 4668498Sasmodai 47154128Simp#define __HAVE_ACPI 48223440Sjhb#define __HAVE_PIR 49154128Simp#define __PCI_REROUTE_INTERRUPT 50154128Simp 5144364Simp#ifndef MACHINE 52551Srgrimes#define MACHINE "i386" 5344364Simp#endif 5444364Simp#ifndef MACHINE_ARCH 5538673Skato#define MACHINE_ARCH "i386" 5644364Simp#endif 5736977Sbde#define MID_MACHINE MID_I386 5836977Sbde 59177661Sjb#if defined(SMP) || defined(KLD_MODULE) 60224207Sattilio#ifndef MAXCPU 61183525Sjhb#define MAXCPU 32 62224207Sattilio#endif 6328354Sfsmp#else 6466296Sps#define MAXCPU 1 65177661Sjb#endif /* SMP || KLD_MODULE */ 664Srgrimes 67250338Sattilio#ifndef MAXMEMDOM 68250338Sattilio#define MAXMEMDOM 1 69250338Sattilio#endif 70250338Sattilio 7168498Sasmodai#define ALIGNBYTES _ALIGNBYTES 7268498Sasmodai#define ALIGN(p) _ALIGN(p) 73195376Ssam/* 74195376Ssam * ALIGNED_POINTER is a boolean macro that checks whether an address 75195376Ssam * is valid to fetch data elements of type t from on this architecture. 76195376Ssam * This does not reflect the optimal alignment, just the possibility 77195376Ssam * (within reasonable limits). 78195376Ssam */ 79195376Ssam#define ALIGNED_POINTER(p, t) 1 804Srgrimes 81191278Srwatson/* 82191278Srwatson * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 83191278Srwatson * architecture. It should be used with appropriate caution. 84191278Srwatson */ 85192331Sjhb#define CACHE_LINE_SHIFT 7 86191276Srwatson#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 87191276Srwatson 8815543Sphk#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 8915565Sphk#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 901045Sdg#define PAGE_MASK (PAGE_SIZE-1) 9115543Sphk#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 9215565Sphk 93281495Skib#if defined(PAE) || defined(PAE_TABLES) 94112841Sjake#define NPGPTD 4 95112841Sjake#define PDRSHIFT 21 /* LOG2(NBPDR) */ 96183343Skmacy#define NPGPTD_SHIFT 9 97112841Sjake#else 98111363Sjake#define NPGPTD 1 99111363Sjake#define PDRSHIFT 22 /* LOG2(NBPDR) */ 100183343Skmacy#define NPGPTD_SHIFT 10 101112841Sjake#endif 102111363Sjake 103111363Sjake#define NBPTD (NPGPTD<<PAGE_SHIFT) 104111363Sjake#define NPDEPTD (NBPTD/(sizeof (pd_entry_t))) 10515543Sphk#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 10615565Sphk#define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ 10727950Sdyson#define PDRMASK (NBPDR-1) 1084Srgrimes 109197316Salc#define MAXPAGESIZES 2 /* maximum number of supported page sizes */ 110197316Salc 11127993Sdyson#define IOPAGES 2 /* pages of i/o permission bitmap */ 11282309Speter 11383366Sjulian#ifndef KSTACK_PAGES 11483366Sjulian#define KSTACK_PAGES 2 /* Includes pcb! */ 11582309Speter#endif 116116355Salc#define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */ 117286288Skib#if KSTACK_PAGES < 4 118286288Skib#define TD0_KSTACK_PAGES 4 119286288Skib#else 120286288Skib#define TD0_KSTACK_PAGES KSTACK_PAGES 121286288Skib#endif 1224Srgrimes 1234Srgrimes/* 124239730Sdes * Ceiling on amount of swblock kva space, can be changed via 125239730Sdes * the kern.maxswzone /boot/loader.conf variable. 126239730Sdes * 127239730Sdes * 276 is sizeof(struct swblock), but we do not always have a definition 128239730Sdes * in scope for struct swblock, so we have to hardcode it. Each struct 129239730Sdes * swblock holds metadata for 32 pages, so in theory, this is enough for 130239730Sdes * 16 GB of swap. In practice, however, the usable amount is considerably 131239730Sdes * lower due to fragmentation. 132239730Sdes */ 133239730Sdes#ifndef VM_SWZONE_SIZE_MAX 134239730Sdes#define VM_SWZONE_SIZE_MAX (276 * 128 * 1024) 135239730Sdes#endif 136239730Sdes 137239730Sdes/* 13881933Sdillon * Ceiling on size of buffer cache (really only effects write queueing, 139102738Sdillon * the VM page cache is not effected), can be changed via 140102738Sdillon * the kern.maxbcache /boot/loader.conf variable. 141248789Skib * 142248789Skib * The value is equal to the size of the auto-tuned buffer map for 143248789Skib * the machine with 4GB of RAM, see vfs_bio.c:kern_vfs_bio_buffer_alloc(). 14481933Sdillon */ 14581933Sdillon#ifndef VM_BCACHE_SIZE_MAX 146248789Skib#define VM_BCACHE_SIZE_MAX (7224 * 16 * 1024) 14781933Sdillon#endif 14881933Sdillon 14981933Sdillon/* 1504Srgrimes * Mach derived conversion macros 1514Srgrimes */ 15240286Sdg#define trunc_page(x) ((x) & ~PAGE_MASK) 15340286Sdg#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 154112569Sjake#define trunc_4mpage(x) ((x) & ~PDRMASK) 155112569Sjake#define round_4mpage(x) ((((x)) + PDRMASK) & ~PDRMASK) 1561549Srgrimes 157112569Sjake#define atop(x) ((x) >> PAGE_SHIFT) 158112569Sjake#define ptoa(x) ((x) << PAGE_SHIFT) 1591045Sdg 160112569Sjake#define i386_btop(x) ((x) >> PAGE_SHIFT) 161112569Sjake#define i386_ptob(x) ((x) << PAGE_SHIFT) 162584Srgrimes 16344157Sluoqi#define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 16444157Sluoqi 165285041Skib#define INKERNEL(va) (((vm_offset_t)(va)) >= VM_MAXUSER_ADDRESS && \ 166285041Skib ((vm_offset_t)(va)) < VM_MAX_KERNEL_ADDRESS) 167285041Skib 168196994Sphk#endif /* !_I386_INCLUDE_PARAM_H_ */ 169