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/* $OpenBSD: vmparam.h,v 1.16 2007/04/21 13:43:38 art Exp $ */
/* $NetBSD: vmparam.h,v 1.18 2001/05/01 02:19:19 thorpej Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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, Lawrence Berkeley Laboratory.
*
* 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 8.1 (Berkeley) 6/11/93
*/
/*
* Machine dependent constants for Sun-4c SPARC
*/
#ifndef VMPARAM_H
#define VMPARAM_H
/*
* USRTEXT is the start of the user text/data space, while USRSTACK
* is the top (end) of the user stack.
*/
#define USRTEXT 0x2000 /* Start of user text */
#define USRSTACK 0xffffffffffffe000L
/*
* Virtual memory related constants, all in bytes
*/
/* #ifdef __arch64__ */
#if 0
/*
* 64-bit limits:
*
* Since the compiler generates `call' instructions we can't
* have more than 4GB in a single text segment.
*
* And since we only have a 40-bit adderss space, allow half
* of that for data and the other half for stack.
*/
#ifndef MAXTSIZ
#define MAXTSIZ (4L*1024*1024*1024) /* max text size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ (128L*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (512L*1024*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ MAXDSIZ /* max stack size */
#endif
#else
/*
* 32-bit limits:
*
* We only have 4GB to play with. Limit stack, data, and text
* each to half of that.
*
* This is silly. Apparently if we go above these numbers
* integer overflows in other parts of the kernel cause hangs.
*/
#ifndef MAXTSIZ
#define MAXTSIZ (1*1024*1024*1024) /* max text size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ (128*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (1*1024*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (8*1024*1024) /* max stack size */
#endif
#endif
#define STACKGAP_RANDOM 256*1024
/*
* Size of shared memory map
*/
#ifndef SHMMAXPGS
#define SHMMAXPGS 4096 /* 32mb */
#endif
/*
* Mach derived constants
*/
/*
* User/kernel map constants.
*/
#define VM_MIN_ADDRESS ((vaddr_t)0)
#define VM_MAX_ADDRESS ((vaddr_t)-1)
#define VM_MAXUSER_ADDRESS ((vaddr_t)-1)
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE)
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0x000007ffffffffffL)
#define VM_PHYSSEG_MAX 32 /* up to 32 segments */
#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
#define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */
#define VM_NFREELIST 1
#define VM_FREELIST_DEFAULT 0
#define __HAVE_VM_PAGE_MD
/*
* For each struct vm_page, there is a list of all currently valid virtual
* mappings of that page. An entry is a pv_entry_t, the list is pv_table.
*
* XXX - this doesn't belong here, but for now we have to keep it here
* because of include ordering issues.
*/
typedef struct pv_entry {
struct pv_entry *pv_next; /* next pv_entry */
struct pmap *pv_pmap; /* pmap where mapping lies */
vaddr_t pv_va; /* virtual address for mapping */
} *pv_entry_t;
/* PV flags encoded in the low bits of the VA of the first pv_entry */
struct vm_page_md {
struct pv_entry pvent;
};
#define VM_MDPAGE_INIT(pg) do { \
(pg)->mdpage.pvent.pv_next = NULL; \
(pg)->mdpage.pvent.pv_pmap = NULL; \
(pg)->mdpage.pvent.pv_va = 0; \
} while (0)
#if defined (_KERNEL) && !defined(_LOCORE)
struct vm_map;
vaddr_t dvma_mapin(struct vm_map *, vaddr_t, int, int);
void dvma_mapout(vaddr_t, vaddr_t, int);
#endif
#endif
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