/* $NetBSD: vmparam.h,v 1.2 2014/03/18 18:20:41 riastradh Exp $ */ /*- * Copyright (c) 2013 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Matt Thomas of 3am Software Foundry. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _EVBCF_VMPARAM_H_ #define _EVBCF_VMPARAM_H_ /* * Machine dependent VM constants for EVBCF (Coldfire) */ /* * We use 4K pages on coldfire. Override the PAGE_* definitions * to be compile-time constants. */ #define PAGE_SHIFT PGSHIFT #define PAGE_SIZE (1 << PAGE_SHIFT) #define PAGE_MASK (PAGE_SIZE - 1) /* * USRSTACK is the top (end) of the user stack. */ #define USRSTACK VM_MAXUSER_ADDRESS /* Start of user stack */ /* * Virtual memory related constants, all in bytes */ #ifndef MAXTSIZ #define MAXTSIZ (16*1024*1024) /* max text size */ #endif #ifndef DFLDSIZ #define DFLDSIZ (64*1024*1024) /* initial data size limit */ #endif #ifndef MAXDSIZ #define MAXDSIZ (128*1024*1024) /* max data size */ #endif #ifndef DFLSSIZ #define DFLSSIZ (512*1024) /* initial stack size limit */ #endif #ifndef MAXSSIZ #define MAXSSIZ (16*1024*1024) /* max stack size */ #endif /* * PTEs for mapping user space into the kernel for phyio operations. * One page is enough to handle 4MB of simultaneous raw IO operations. */ #ifndef USRIOSIZE #define USRIOSIZE (1 * NPTEPG) /* 4MB */ #endif /* user/kernel map constants */ #define VM_MIN_ADDRESS ((vaddr_t)0) #define VM_MAXUSER_ADDRESS ((vaddr_t)0xBFF00000) #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xC0000000) #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)-PAGE_SIZE) /* virtual sizes (bytes) for various kernel submaps */ #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) /* * Constants which control the way the VM system deals with memory segments. * The evbcf port has one physical memory segment. */ #define VM_PHYSSEG_MAX 1 #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM #define VM_NFREELIST 1 #define VM_FREELIST_DEFAULT 0 #endif /* _EVBCF_VMPARAM_H_ */ |