/* $NetBSD: vmparam.h,v 1.39.2.1 2020/02/10 18:46:40 martin Exp $ */ /* * Copyright (c) 1988 University of Utah. * Copyright (c) 1982, 1986, 1990, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * 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. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ * * @(#)vmparam.h 8.2 (Berkeley) 4/19/94 */ #ifndef _X68K_VMPARAM_H_ #define _X68K_VMPARAM_H_ /* * Machine dependent constants for X68K */ /* * Use common m68k definitions to define PAGE_SIZE and related constants. */ #include /* * 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 (32*1024*1024) /* max text size */ #endif #ifndef DFLDSIZ #define DFLDSIZ (16*1024*1024) /* initial data size limit */ #endif #ifndef MAXDSIZ #define MAXDSIZ (64*1024*1024) /* max data size */ #endif #ifndef DFLSSIZ #define DFLSSIZ (512*1024) /* initial stack size limit */ #endif #ifndef MAXSSIZ #define MAXSSIZ MAXDSIZ /* 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 /* * Mach derived constants */ /* user/kernel map constants */ #define VM_MIN_ADDRESS ((vaddr_t)0) #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-PAGE_SIZE*NPTEPG)) /* virtual sizes (bytes) for various kernel submaps */ #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) /* # of kernel PT pages (initial only, can grow dynamically) */ #define VM_KERNEL_PT_PAGES ((vsize_t)4) /* * Constants which control the way the VM system deals with memory segments. */ #define VM_PHYSSEG_MAX 3 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST /* Actually VM_PSTRAT_UPPERFIRST is needed */ #define VM_NFREELIST 2 #define VM_FREELIST_DEFAULT 0 #define VM_FREELIST_HIGHMEM VM_FREELIST_DEFAULT #define VM_FREELIST_MAINMEM 1 #define __HAVE_PMAP_PHYSSEG /* * pmap-specific data stored in the vm_physmem[] array. */ struct pmap_physseg { struct pv_header *pvheader; /* pv table for this seg */ }; #endif /* _X68K_VMPARAM_H_ */