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95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
/* $NetBSD: vmparam.h,v 1.1 2014/09/03 19:34:26 matt Exp $ */
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/*-
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* Copyright (c) 2014 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _OR1K_VMPARAM_H_
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#define _OR1K_VMPARAM_H_
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/*
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* OR1K supports 1 page size: 8KB.
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*/
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#define PAGE_SHIFT 13
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#define PAGE_SIZE (1 << PAGE_SHIFT)
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#define PAGE_MASK (PAGE_SIZE - 1)
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#define USPACE 16384
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#define UPAGES (USPACE >> PAGE_SHIFT)
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/*
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* USRSTACK is the top (end) of the user stack. The user VA space is a
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* 32-bit address space starting at 0. Place the stack at its top end.
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*/
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#define USRSTACK ((vaddr_t) 0x80000000U - PAGE_SIZE)
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#ifndef MAXTSIZ
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#define MAXTSIZ (1UL << 26) /* 32bit max text size (64MB) */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (1UL << 30) /* max data size (1024MB) */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ (1UL << 26) /* max stack size (64MB) */
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#endif
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#ifndef DFLDSIZ
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#define DFLDSIZ (1UL << 27) /* 32bit default data size (128MB) */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (1UL << 21) /* 32bit default stack size (2MB) */
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#endif
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#define VM_MIN_ADDRESS ((vaddr_t) 0x0)
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#define VM_MAXUSER_ADDRESS ((vaddr_t) 0x80000000 - PAGE_SIZE)
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#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
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/*
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* Give ourselves 64GB of mappable kernel space. That leaves the rest
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* to be user for directly mapped (block addressable) addresses.
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*/
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#define VM_MIN_KERNEL_ADDRESS ((vaddr_t) 0x80000000L)
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#define VM_MAX_KERNEL_ADDRESS ((vaddr_t) -PAGE_SIZE)
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/* virtual sizes (bytes) for various kernel submaps */
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#define USRIOSIZE (PAGE_SIZE / 8)
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#define VM_PHYS_SIZE (USRIOSIZE * PAGE_SIZE)
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/* */
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#define VM_PHYSSEG_MAX 16 /* XXX */
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#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
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#define VM_NFREELIST 1
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#define VM_FREELIST_DEFAULT 0
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#endif /* _OR1K_VMPARAM_H_ */
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