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vmparam.h revision 1.28 
      1 /*	$NetBSD: vmparam.h,v 1.28 2012/02/18 16:29:37 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #ifndef	_EVBARM_VMPARAM_H_
     33 #define	_EVBARM_VMPARAM_H_
     34 
     35 #if defined(_KERNEL) || defined(_KMEMUSER)
     36 
     37 #include <arm/arm32/vmparam.h>
     38 
     39 /*
     40  * Address space constants
     41  */
     42 
     43 /*
     44  * The line between user space and kernel space
     45  * Mappings >= KERNEL_BASE are constant across all processes
     46  */
     47 #ifdef KERNEL_BASE_EXT
     48 #define	KERNEL_BASE		KERNEL_BASE_EXT
     49 #else
     50 #define	KERNEL_BASE		0x80000000
     51 #endif
     52 
     53 /*
     54  * Override the default pager_map size, there's not enough KVA.
     55  */
     56 #define PAGER_MAP_DEFAULT_SIZE		(4 * 1024 * 1024)
     57 
     58 /*
     59  * Size of User Raw I/O map
     60  */
     61 
     62 #define USRIOSIZE       300
     63 
     64 /* virtual sizes (bytes) for various kernel submaps */
     65 
     66 #define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
     67 
     68 /*
     69  * max number of non-contig chunks of physical RAM you can have
     70  */
     71 
     72 #define	VM_PHYSSEG_MAX		32
     73 
     74 /*
     75  * when converting a physical address to a vm_page structure, we
     76  * want to use a binary search on the chunks of physical memory
     77  * to find our RAM
     78  */
     79 
     80 #define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
     81 
     82 /*
     83  * we support 2 free lists:
     84  *
     85  *	- DEFAULT for all systems
     86  *	- ISADMA for the ISA DMA range on Sharks only
     87  */
     88 
     89 #define	VM_NFREELIST		2
     90 #define	VM_FREELIST_DEFAULT	0
     91 #define	VM_FREELIST_ISADMA	1
     92 
     93 #endif /* _KERNEL || _KMEMUSER */
     94 
     95 #endif	/* _EVBARM_VMPARAM_H_ */
     96