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/* $OpenBSD: vmparam.h,v 1.6 2000/11/08 21:27:25 ericj Exp $ */
/* $NetBSD: vmparam.h,v 1.18 2000/05/22 17:13:54 thorpej Exp $ */
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1992, 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 and Ralph Campbell.
*
* 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) 4/22/94
*/
#ifndef _ALPHA_VMPARAM_H_
#define _ALPHA_VMPARAM_H_
/*
* Machine dependent constants for Alpha.
*/
/*
* 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.
*
* Digital UNIX (formerly DEC OSF/1) places the stack below the
* text segment (i.e. growing downward from 4G). We may want to
* consider doing that at some point, but it might require changes
* to the exec code.
*/
#define USRTEXT NBPG
#define USRSTACK ((vaddr_t)0x0000000200000000) /* 8G */
/*
* Virtual memory related constants, all in bytes
*/
#ifndef MAXTSIZ
#define MAXTSIZ (1<<30) /* max text size (1G) */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ (1<<27) /* initial data size (128M) */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (1<<30) /* max data size (1G) */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (1<<21) /* initial stack size (2M) */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (1<<25) /* max stack size (32M) */
#endif
/*
* PTEs for mapping user space into the kernel for phyio operations.
* 64 pte's are enough to cover 8 disks * MAXBSIZE.
*/
#ifndef USRIOSIZE
#define USRIOSIZE 64
#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 /* 8mb */
#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)ALPHA_USEG_BASE) /* 0 */
#define VM_MAXUSER_ADDRESS ((vaddr_t)(ALPHA_USEG_END + 1L)) /* 4T */
#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)ALPHA_K1SEG_BASE)
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)ALPHA_K1SEG_END)
/* virtual sizes (bytes) for various kernel submaps */
#define VM_MBUF_SIZE (NMBCLUSTERS*MCLBYTES)
#define VM_KMEM_SIZE (NKMEMCLUSTERS*NBPG)
#define VM_PHYS_SIZE (USRIOSIZE*NBPG)
/* some Alpha-specific constants */
#define VPTBASE ((vaddr_t)0xfffffffc00000000) /* Virt. pg table */
#define MACHINE_NEW_NONCONTIG
#define VM_PHYSSEG_MAX 16 /* XXX */
#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
#define VM_PHYSSEG_NOADD /* no more after vm_mem_init */
#define VM_NFREELIST 1
#define VM_FREELIST_DEFAULT 0
/*
* pmap-specific data stored in the vm_physmem[] array.
*/
struct pmap_physseg {
struct pv_head *pvhead; /* pv list of this seg */
};
#endif /* ! _ALPHA_VMPARAM_H_ */
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