159 lines
5.2 KiB
C
159 lines
5.2 KiB
C
/* $NetBSD: vmparam.h,v 1.21 2001/05/01 02:19:20 thorpej Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1988 University of Utah.
|
|
* Copyright (c) 1982, 1986, 1990, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* the Systems Programming Group of the University of Utah Computer
|
|
* Science Department.
|
|
*
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 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: Utah $Hdr: vmparam.h 1.16 91/01/18$
|
|
*
|
|
* @(#)vmparam.h 8.2 (Berkeley) 4/19/94
|
|
*/
|
|
|
|
#ifndef _X68K_VMPARAM_H_
|
|
#define _X68K_VMPARAM_H_
|
|
|
|
/*
|
|
* Machine dependent constants for X68K
|
|
*/
|
|
|
|
/*
|
|
* We use 4K pages on the X86K. Override the PAGE_* definitions
|
|
* to be compile-time constants.
|
|
*/
|
|
#define PAGE_SHIFT 12
|
|
#define PAGE_SIZE (1 << PAGE_SHIFT)
|
|
#define PAGE_MASK (PAGE_SIZE - 1)
|
|
|
|
/*
|
|
* USRTEXT is the start of the user text/data space, while USRSTACK
|
|
* is the top (end) of the user stack.
|
|
*/
|
|
#define USRTEXT 8192 /* Must equal __LDPGSZ */
|
|
#define USRSTACK VM_MAXUSER_ADDRESS /* Start of user stack */
|
|
|
|
/*
|
|
* Virtual memory related constants, all in bytes
|
|
*/
|
|
#ifndef MAXTSIZ
|
|
#define MAXTSIZ (8*1024*1024) /* max text size */
|
|
#endif
|
|
#ifndef DFLDSIZ
|
|
#define DFLDSIZ (16*1024*1024) /* initial data size limit */
|
|
#endif
|
|
#ifndef MAXDSIZ
|
|
#define MAXDSIZ (64*1024*1024) /* max data size */
|
|
#endif
|
|
#ifndef DFLSSIZ
|
|
#define DFLSSIZ (512*1024) /* initial stack size limit */
|
|
#endif
|
|
#ifndef MAXSSIZ
|
|
#define MAXSSIZ MAXDSIZ /* max stack size */
|
|
#endif
|
|
|
|
/*
|
|
* Sizes of the system and user portions of the system page table.
|
|
*/
|
|
/* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
|
|
#define SYSPTSIZE (2 * NPTEPG) /* 8mb */
|
|
#define USRPTSIZE (1 * NPTEPG) /* 4mb */
|
|
|
|
/*
|
|
* PTEs for mapping user space into the kernel for phyio operations.
|
|
* One page is enough to handle 4Mb of simultaneous raw IO operations.
|
|
*/
|
|
#ifndef USRIOSIZE
|
|
#define USRIOSIZE (1 * NPTEPG) /* 4mb */
|
|
#endif
|
|
|
|
/*
|
|
* PTEs for system V style shared memory.
|
|
* This is basically slop for kmempt which we actually allocate (malloc) from.
|
|
*/
|
|
#ifndef SHMMAXPGS
|
|
#define SHMMAXPGS 1024 /* 4mb */
|
|
#endif
|
|
|
|
/*
|
|
* The time for a process to be blocked before being very swappable.
|
|
* This is a number of seconds which the system takes as being a non-trivial
|
|
* amount of real time. You probably shouldn't change this;
|
|
* it is used in subtle ways (fractions and multiples of it are, that is, like
|
|
* half of a ``long time'', almost a long time, etc.)
|
|
* It is related to human patience and other factors which don't really
|
|
* change over time.
|
|
*/
|
|
#define MAXSLP 20
|
|
|
|
/*
|
|
* Mach derived constants
|
|
*/
|
|
|
|
/* user/kernel map constants */
|
|
#define VM_MIN_ADDRESS ((vaddr_t)0)
|
|
#define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFFFD000)
|
|
#define VM_MAX_ADDRESS ((vaddr_t)0xFFFFD000)
|
|
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0)
|
|
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFFFFF000)
|
|
|
|
/* virtual sizes (bytes) for various kernel submaps */
|
|
#define VM_PHYS_SIZE (USRIOSIZE*NBPG)
|
|
|
|
/* # of kernel PT pages (initial only, can grow dynamically) */
|
|
#define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */
|
|
|
|
/*
|
|
* Constants which control the way the VM system deals with memory segments.
|
|
*/
|
|
#define VM_PHYSSEG_MAX 3
|
|
#define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST
|
|
/* Actually VM_PSTRAT_UPPERFIRST is needed */
|
|
#define VM_PHYSSEG_NOADD
|
|
|
|
#define VM_NFREELIST 1
|
|
#define VM_FREELIST_DEFAULT 0
|
|
|
|
#define __HAVE_PMAP_PHYSSEG
|
|
|
|
/*
|
|
* pmap-specific data stored in the vm_physmem[] array.
|
|
*/
|
|
struct pmap_physseg {
|
|
struct pv_entry *pvent; /* pv table for this seg */
|
|
char *attrs; /* page attributes for this seg */
|
|
};
|
|
|
|
#endif /* _X68K_VMPARAM_H_ */
|