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/* $OpenBSD: vmparam.h,v 1.4 2008/06/24 21:24:03 deraadt Exp $ */
/* $NetBSD: vmparam.h,v 1.18 2003/05/21 18:04:44 thorpej Exp $ */
/*
* Copyright (c) 2001, 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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 for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
#ifndef _ARM_ARM_VMPARAM_H_
#define _ARM_ARM_VMPARAM_H_
#ifdef _KERNEL
/*
* Virtual Memory parameters common to all arm32 platforms.
*/
#include <sys/lock.h> /* struct simplelock */
#include <arm/pte.h> /* pt_entry_t */
#endif /* _KERNEL */
#define USRTEXT VM_MIN_ADDRESS
#define USRSTACK VM_MAXUSER_ADDRESS
#define KERNBASE VM_MAXUSER_ADDRESS
/*
* Note that MAXTSIZ can't be larger than 32M, otherwise the compiler
* would have to be changed to not generate "bl" instructions.
*/
#define MAXTSIZ (16*1024*1024) /* max text size */
#ifndef DFLDSIZ
#define DFLDSIZ (128*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (512*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (2*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (8*1024*1024) /* max stack size */
#endif
#define STACKGAP_RANDOM 256*1024
/*
* Size of SysV shared memory map
*/
#ifndef SHMMAXPGS
#define SHMMAXPGS 1024
#endif
/*
* While the ARM architecture defines Section mappings, large pages,
* and small pages, the standard page size is (and will always be) 4K.
*/
#define PAGE_SHIFT 12
#define PAGE_SIZE (1 << PAGE_SHIFT) /* bytes/page */
#define PAGE_MASK (PAGE_SIZE - 1)
/*
* Mach derived constants
*/
#define VM_MIN_ADDRESS ((vaddr_t) PAGE_SIZE)
#define VM_MAXUSER_ADDRESS ((vaddr_t) ARM_KERNEL_BASE)
#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t) ARM_KERNEL_BASE)
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t) 0xffffffff)
#ifdef _KERNEL
/* XXX max. amount of KVM to be used by buffers. */
#ifndef VM_MAX_KERNEL_BUF
extern vaddr_t virtual_avail;
extern vaddr_t virtual_end;
#define VM_MAX_KERNEL_BUF \
((virtual_end - virtual_avail) * 4 / 10)
#endif
/*
* pmap-specific data store in the vm_page structure.
*/
#define __HAVE_VM_PAGE_MD
struct vm_page_md {
struct pv_entry *pvh_list; /* pv_entry list */
struct simplelock pvh_slock; /* lock on this head */
int pvh_attrs; /* page attributes */
u_int uro_mappings;
u_int urw_mappings;
union {
u_short s_mappings[2]; /* Assume kernel count <= 65535 */
u_int i_mappings;
} k_u;
#define kro_mappings k_u.s_mappings[0]
#define krw_mappings k_u.s_mappings[1]
#define k_mappings k_u.i_mappings
};
#define VM_MDPAGE_INIT(pg) \
do { \
(pg)->mdpage.pvh_list = NULL; \
simple_lock_init(&(pg)->mdpage.pvh_slock); \
(pg)->mdpage.pvh_attrs = 0; \
(pg)->mdpage.uro_mappings = 0; \
(pg)->mdpage.urw_mappings = 0; \
(pg)->mdpage.k_mappings = 0; \
} while (/*CONSTCOND*/0)
#endif /* _KERNEL */
#endif /* _ARM_ARM_VMPARAM_H_ */
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