1 /* $NetBSD: vmparam.h,v 1.21 2017/02/02 21:53:54 rin Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1986, 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 37 * 38 * @(#)vmparam.h 8.2 (Berkeley) 4/19/94 39 */ 40 41 #ifndef _MACHINE_VMPARAM_H_ 42 #define _MACHINE_VMPARAM_H_ 43 44 /* 45 * We use 4K pages on the luna68k. Override the PAGE_* definitions 46 * to be compile-time constants. 47 */ 48 #define PAGE_SHIFT PGSHIFT 49 #define PAGE_SIZE (1 << PAGE_SHIFT) 50 #define PAGE_MASK (PAGE_SIZE - 1) 51 52 /* 53 * USRSTACK is the top (end) of the user stack. 54 */ 55 #define USRSTACK VM_MAXUSER_ADDRESS 56 57 /* 58 * Virtual memory related constants, all in bytes 59 */ 60 #ifndef MAXTSIZ 61 #define MAXTSIZ (32*1024*1024) /* max text size */ 62 #endif 63 #ifndef DFLDSIZ 64 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 65 #endif 66 #ifndef MAXDSIZ 67 #define MAXDSIZ (64*1024*1024) /* max data size */ 68 #endif 69 #ifndef DFLSSIZ 70 #define DFLSSIZ (512*1024) /* initial stack size limit */ 71 #endif 72 #ifndef MAXSSIZ 73 #define MAXSSIZ MAXDSIZ /* max stack size */ 74 #endif 75 76 /* 77 * PTEs for mapping user space into the kernel for phyio operations. 78 * One page is enough to handle 4Mb of simultaneous raw IO operations. 79 */ 80 #ifndef USRIOSIZE 81 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 82 #endif 83 84 /* 85 * Mach derived constants 86 */ 87 88 /* user/kernel map constants */ 89 #define VM_MIN_ADDRESS ((vaddr_t)0) 90 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) 91 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 92 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 93 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0x40000000-PAGE_SIZE*NPTEPG)) 94 95 /* virtual sizes (bytes) for various kernel submaps */ 96 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 97 98 /* # of kernel PT pages (initial only, can grow dynamically) */ 99 #define VM_KERNEL_PT_PAGES ((vsize_t)2) 100 101 /* 102 * Constants which control the way the VM system deals with memory segments. 103 * Only one physical contigous memory segment. 104 */ 105 #define VM_PHYSSEG_MAX 1 106 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 107 108 #define VM_NFREELIST 1 109 #define VM_FREELIST_DEFAULT 0 110 111 #define __HAVE_PMAP_PHYSSEG 112 113 /* 114 * pmap-specific data stored in the vm_physmem[] array. 115 */ 116 struct pmap_physseg { 117 struct pv_header *pvheader; /* pv table for this seg */ 118 }; 119 120 #endif /* _MACHINE_VMPARAM_H_ */ 121