99 lines
3.3 KiB
C
99 lines
3.3 KiB
C
/* $NetBSD: vmparam.h,v 1.2 2014/03/18 18:20:41 riastradh Exp $ */
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/*-
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* Copyright (c) 2013 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 _EVBCF_VMPARAM_H_
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#define _EVBCF_VMPARAM_H_
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/*
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* Machine dependent VM constants for EVBCF (Coldfire)
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*/
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/*
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* We use 4K pages on coldfire. Override the PAGE_* definitions
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* to be compile-time constants.
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*/
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#define PAGE_SHIFT PGSHIFT
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#define PAGE_SIZE (1 << PAGE_SHIFT)
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#define PAGE_MASK (PAGE_SIZE - 1)
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/*
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* USRSTACK is the top (end) of the user stack.
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*/
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#define USRSTACK VM_MAXUSER_ADDRESS /* Start of user stack */
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/*
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* Virtual memory related constants, all in bytes
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*/
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#ifndef MAXTSIZ
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#define MAXTSIZ (16*1024*1024) /* max text size */
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#endif
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#ifndef DFLDSIZ
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#define DFLDSIZ (64*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (128*1024*1024) /* max data size */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (512*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ (16*1024*1024) /* max stack size */
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#endif
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/*
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* PTEs for mapping user space into the kernel for phyio operations.
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* One page is enough to handle 4MB of simultaneous raw IO operations.
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*/
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#ifndef USRIOSIZE
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#define USRIOSIZE (1 * NPTEPG) /* 4MB */
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#endif
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/* user/kernel map constants */
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#define VM_MIN_ADDRESS ((vaddr_t)0)
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#define VM_MAXUSER_ADDRESS ((vaddr_t)0xBFF00000)
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#define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000)
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#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xC0000000)
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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 VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
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/*
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* Constants which control the way the VM system deals with memory segments.
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* The evbcf port has one physical memory segment.
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*/
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#define VM_PHYSSEG_MAX 1
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#define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM
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#define VM_NFREELIST 1
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#define VM_FREELIST_DEFAULT 0
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#endif /* _EVBCF_VMPARAM_H_ */
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