/* $NetBSD: vmparam.h,v 1.18.2.1 2020/02/10 18:46:41 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 _MACHINE_VMPARAM_H_ #define _MACHINE_VMPARAM_H_ /* * Machine dependent constants for cesfic */ /* * Use common m68k definitions to define PAGE_SIZE and related constants. */ #include /* * USRSTACK is the top (end) of the user stack. * * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3) * is for HPUX compatibility. Why?? Because HPUX's debuggers * have the user's stack hard-wired at FFF00000 for post-mortems, * and we must be compatible... */ #define USRSTACK (-HIGHPAGES*PAGE_SIZE) /* Start of user stack */ #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */ #define P1PAGES 0x100000 #define HIGHPAGES (0x100000/PAGE_SIZE) /* * Virtual memory related constants, all in bytes */ #ifndef MAXTSIZ #define MAXTSIZ (32*1024*1024) /* max text size */ #endif #ifndef DFLDSIZ #define DFLDSIZ (32*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 /* * Default sizes of swap allocation chunks (see dmap.h). * The actual values may be changed in vminit() based on MAXDSIZ. * With MAXDSIZ of 16Mb and NDMAP of 38, dmmax will be 1024. * DMMIN should be at least ctod(1) so that vtod() works. * vminit() insures this. */ #define DMMIN 32 /* smallest swap allocation */ #define DMMAX 4096 /* largest potential swap allocation */ /* * 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)0x00002000) #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-PAGE_SIZE*NPTEPG*2)) /* 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)2) /* Use new VM page bootstrap interface. */ #define MACHINE_NEW_NONCONTIG /* * Constants which control the way the VM system deals with memory segments. * The cesfic only has one usable physical memory segment. */ #define VM_PHYSSEG_MAX 1 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH #define VM_NFREELIST 1 #define VM_FREELIST_DEFAULT 0 #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 /* _MACHINE_VMPARAM_H_ */