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      1 /* $NetBSD: vmparam.h,v 1.1 2014/09/03 19:34:26 matt Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Matt Thomas of 3am Software Foundry.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _OR1K_VMPARAM_H_
     33 #define _OR1K_VMPARAM_H_
     34 
     35 /*
     36  * OR1K supports 1 page size: 8KB.
     37  */
     38 
     39 #define PAGE_SHIFT	13
     40 #define PAGE_SIZE	(1 << PAGE_SHIFT)
     41 #define PAGE_MASK	(PAGE_SIZE - 1)
     42 
     43 #define USPACE		16384
     44 #define	UPAGES		(USPACE >> PAGE_SHIFT)
     45 
     46 /*
     47  * USRSTACK is the top (end) of the user stack.  The user VA space is a
     48  * 32-bit address space starting at 0.  Place the stack at its top end.
     49  */
     50 #define USRSTACK	((vaddr_t) 0x80000000U - PAGE_SIZE)
     51 
     52 #ifndef MAXTSIZ
     53 #define	MAXTSIZ		(1UL << 26)	/* 32bit max text size (64MB) */
     54 #endif
     55 
     56 #ifndef MAXDSIZ
     57 #define	MAXDSIZ		(1UL << 30)	/* max data size (1024MB) */
     58 #endif
     59 
     60 #ifndef MAXSSIZ
     61 #define	MAXSSIZ		(1UL << 26)	/* max stack size (64MB) */
     62 #endif
     63 
     64 #ifndef DFLDSIZ
     65 #define	DFLDSIZ		(1UL << 27)	/* 32bit default data size (128MB) */
     66 #endif
     67 
     68 #ifndef DFLSSIZ
     69 #define	DFLSSIZ		(1UL << 21)	/* 32bit default stack size (2MB) */
     70 #endif
     71 
     72 #define	VM_MIN_ADDRESS		((vaddr_t) 0x0)
     73 #define	VM_MAXUSER_ADDRESS	((vaddr_t) 0x80000000 - PAGE_SIZE)
     74 #define	VM_MAX_ADDRESS		VM_MAXUSER_ADDRESS
     75 
     76 /*
     77  * Give ourselves 64GB of mappable kernel space.  That leaves the rest
     78  * to be user for directly mapped (block addressable) addresses.
     79  */
     80 #define VM_MIN_KERNEL_ADDRESS	((vaddr_t) 0x80000000L)
     81 #define VM_MAX_KERNEL_ADDRESS	((vaddr_t) -PAGE_SIZE)
     82 
     83 /* virtual sizes (bytes) for various kernel submaps */
     84 #define USRIOSIZE		(PAGE_SIZE / 8)
     85 #define VM_PHYS_SIZE		(USRIOSIZE * PAGE_SIZE)
     86 
     87 /* */
     88 #define VM_PHYSSEG_MAX		16              /* XXX */
     89 #define VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
     90 
     91 #define VM_NFREELIST		1
     92 #define	VM_FREELIST_DEFAULT	0
     93 
     94 #endif /* _OR1K_VMPARAM_H_ */
     95