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/* $OpenBSD: vmparam.h,v 1.16 2008/08/22 10:41:37 kurt Exp $ */
/* $NetBSD: vmparam.h,v 1.5 1994/10/26 21:10:10 cgd 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. 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 _MIPS_VMPARAM_H_
#define _MIPS_VMPARAM_H_
/*
* Machine dependent constants mips processors.
*/
/*
* USRTEXT is the start of the user text/data space, while USRSTACK
* is the top (end) of the user stack.
*/
#define USRTEXT 0x0000000000400000L
#define USRSTACK 0x0000000080000000L /* Start of user stack */
/*
* Virtual memory related constants, all in bytes
*/
#ifndef MAXTSIZ
#define MAXTSIZ (64*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 (2*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (32*1024*1024) /* max stack size */
#endif
#define STACKGAP_RANDOM 256*1024
/*
* PTEs for mapping user space into the kernel for physio operations.
* 16 pte's are enough to cover 8 disks * MAXBSIZE.
*/
#ifndef USRIOSIZE
#define USRIOSIZE 32
#endif
/*
* PTEs for system V style shared memory.
* This is basically slop for kmempt which we actually allocate (malloc) from.
*/
#ifndef SHMMAXPGS
#define SHMMAXPGS 8192 /* 8mb */
#endif
#ifndef VM_PHYSSEG_MAX
#define VM_PHYSSEG_MAX 8 /* Max number of physical memory segments */
#endif
#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
#define VM_PHYSSEG_NOADD
/* user/kernel map constants */
#define VM_MIN_ADDRESS ((vaddr_t)0x0000000000000000L)
#define VM_MAXUSER_ADDRESS ((vaddr_t)0x0000000080000000L)
#define VM_MAX_ADDRESS ((vaddr_t)0x0000000080000000L)
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xffffffffc0000000L)
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xfffffffffffff000L)
/* map PIE below 256MB (non-pie link address) to avoid mmap pressure */
#define VM_PIE_MIN_ADDR PAGE_SIZE
#define VM_PIE_MAX_ADDR 0x10000000UL
#ifndef VM_NFREELIST
#define VM_NFREELIST 1
#endif
#define VM_FREELIST_DEFAULT 0
/* virtual sizes (bytes) for various kernel submaps */
#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
#if defined(_KERNEL) && !defined(_LOCORE)
/*
* pmap-specific data
*/
/* XXX - belongs in pmap.h, but put here because of 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;
#define __HAVE_VM_PAGE_MD
struct vm_page_md {
struct pv_entry pv_ent; /* pv list of this seg */
};
#define VM_MDPAGE_INIT(pg) \
do { \
(pg)->mdpage.pv_ent.pv_next = NULL; \
(pg)->mdpage.pv_ent.pv_pmap = NULL; \
(pg)->mdpage.pv_ent.pv_va = 0; \
} while (0)
#endif /* _KERNEL && !_LOCORE */
#endif /* !_MIPS_VMPARAM_H_ */
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