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/* $OpenBSD: vmparam.h,v 1.38 2007/04/26 11:31:52 art Exp $ */
/* $NetBSD: vmparam.h,v 1.15 1994/10/27 04:16:34 cgd Exp $ */
/*-
* 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.
*
* @(#)vmparam.h 5.9 (Berkeley) 5/12/91
*/
#ifndef _MACHINE_VM_PARAM_H_
#define _MACHINE_VM_PARAM_H_
/*
* Machine dependent constants for 386.
*/
/*
* Virtual address space arrangement. On 386, both user and kernel
* share the address space, not unlike the vax.
* USRTEXT is the start of the user text/data space, while USRSTACK
* is the top (end) of the user stack. Immediately above the user stack
* resides the user structure, which is UPAGES long and contains the
* kernel stack.
*
* Immediately after the user structure is the page table map, and then
* kernel address space.
*/
#define USRTEXT PAGE_SIZE
#define USRSTACK VM_MAXUSER_ADDRESS
/*
* Virtual memory related constants, all in bytes
*/
#define MAXTSIZ (64*1024*1024) /* max text size */
#ifndef DFLDSIZ
#define DFLDSIZ (64*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (1024*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (4*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (32*1024*1024) /* max stack size */
#endif
#define STACKGAP_RANDOM 256*1024
/* I386 has a line where all code is executable: 0 - I386_MAX_EXE_ADDR */
#define I386_MAX_EXE_ADDR 0x20000000 /* exec line */
/*
* Size of shared memory map
*/
#ifndef SHMMAXPGS
#define SHMMAXPGS 8192
#endif
/*
* Size of User Raw I/O map
*/
#define USRIOSIZE 300
/* user/kernel map constants */
#define VM_MIN_ADDRESS ((vaddr_t)0)
#define VM_MAXUSER_ADDRESS ((vaddr_t)((PDSLOT_PTE<<PDSHIFT) - USPACE))
#define VM_MAX_ADDRESS ((vaddr_t)((PDSLOT_PTE<<PDSHIFT) + \
(PDSLOT_PTE<<PGSHIFT)))
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE)
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(PDSLOT_APTE<<PDSHIFT))
/* virtual sizes (bytes) for various kernel submaps */
#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
#define VM_PHYSSEG_MAX 16 /* actually we could have this many segments */
#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
#define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */
#define VM_NFREELIST 2
#define VM_FREELIST_DEFAULT 0
#define VM_FREELIST_FIRST16 1
#define __HAVE_VM_PAGE_MD
struct pv_entry;
struct vm_page_md {
struct pv_entry *pv_list;
};
#define VM_MDPAGE_INIT(pg) do { \
(pg)->mdpage.pv_list = NULL; \
} while (0)
#endif /* _MACHINE_VM_PARAM_H_ */
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