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vmparam.h revision 1.33 
      1 /*	$NetBSD: vmparam.h,v 1.33 2019/03/27 17:15:29 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 #ifdef __aarch64__
     36 
     37 #include <aarch64/vmparam.h>
     38 
     39 #else
     40 
     41 #include <arm/arm32/vmparam.h>
     42 
     43 /*
     44  * Address space constants
     45  */
     46 
     47 /*
     48  * The line between user space and kernel space
     49  * Mappings >= KERNEL_BASE are constant across all processes
     50  */
     51 #ifdef KERNEL_BASE_EXT
     52 #define	KERNEL_BASE		KERNEL_BASE_EXT
     53 #else
     54 #define	KERNEL_BASE		0x80000000
     55 #endif
     56 
     57 /*
     58  * Size of User Raw I/O map
     59  */
     60 
     61 #define USRIOSIZE       300
     62 
     63 /* virtual sizes (bytes) for various kernel submaps */
     64 
     65 #define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
     66 
     67 /*
     68  * max number of non-contig chunks of physical RAM you can have
     69  */
     70 
     71 #define	VM_PHYSSEG_MAX		32
     72 
     73 /*
     74  * when converting a physical address to a vm_page structure, we
     75  * want to use a binary search on the chunks of physical memory
     76  * to find our RAM
     77  */
     78 
     79 #define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
     80 
     81 /*
     82  * we support 3 free lists:
     83  *
     84  *	- DEFAULT for all systems
     85  *	- ISADMA for the ISA DMA range (could be unused)
     86  *	- DIRECTMAP for systems with direct KVA mapped pages
     87  */
     88 
     89 #define	VM_NFREELIST		3
     90 #define	VM_FREELIST_DEFAULT	0
     91 #define	VM_FREELIST_ISADMA	1
     92 #define	VM_FREELIST_DIRECTMAP	2
     93 
     94 #endif
     95 
     96 #endif	/* _EVBARM_VMPARAM_H_ */
     97