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 _NEWS68K_VMPARAM_H_ 42 #define _NEWS68K_VMPARAM_H_ 43 44 /* 45 * Machine dependent constants for news68k 46 */ 47 48 /* 49 * We use 4K pages on the news68k. Override the PAGE_* definitions 50 * to be compile time constants. 51 */ 52 #define PAGE_SHIFT PGSHIFT 53 #define PAGE_SIZE (1 << PAGE_SHIFT) 54 #define PAGE_MASK (PAGE_SIZE - 1) 55 56 /* 57 * USRSTACK is the top (end) of the user stack. 58 * 59 * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3) 60 * is for HPUX compatibility. Why?? Because HPUX's debuggers 61 * have the user's stack hard-wired at FFF00000 for post-mortems, 62 * and we must be compatible... 63 */ 64 #define USRSTACK (-HIGHPAGES*PAGE_SIZE) /* Start of user stack */ 65 #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */ 66 #define P1PAGES 0x100000 67 #define HIGHPAGES (0x100000/PAGE_SIZE) 68 69 /* 70 * Virtual memory related constants, all in bytes 71 */ 72 #ifndef MAXTSIZ 73 #define MAXTSIZ (32*1024*1024) /* max text size */ 74 #endif 75 #ifndef DFLDSIZ 76 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 77 #endif 78 #ifndef MAXDSIZ 79 #define MAXDSIZ (64*1024*1024) /* max data size */ 80 #endif 81 #ifndef DFLSSIZ 82 #define DFLSSIZ (512*1024) /* initial stack size limit */ 83 #endif 84 #ifndef MAXSSIZ 85 #define MAXSSIZ MAXDSIZ /* max stack size */ 86 #endif 87 88 /* 89 * PTEs for mapping user space into the kernel for phyio operations. 90 * One page is enough to handle 4Mb of simultaneous raw IO operations. 91 */ 92 #ifndef USRIOSIZE 93 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 94 #endif 95 96 /* 97 * Mach derived constants 98 */ 99 100 /* user/kernel map constants */ 101 #define VM_MIN_ADDRESS ((vaddr_t)0) 102 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) 103 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 104 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 105 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0xC0000000-PAGE_SIZE*NPTEPG)) 106 107 /* virtual sizes (bytes) for various kernel submaps */ 108 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 109 110 /* # of kernel PT pages (initial only, can grow dynamically) */ 111 #define VM_KERNEL_PT_PAGES ((vsize_t)2) 112 113 /* 114 * Constants which control the way the VM system deals with memory segments. 115 * The news68k only has one physical memory segment? 116 */ 117 #define VM_PHYSSEG_MAX 1 118 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 119 120 #define VM_NFREELIST 1 121 #define VM_FREELIST_DEFAULT 0 122 123 #define __HAVE_PMAP_PHYSSEG 124 125 /* 126 * pmap-specific data stored in the vm_physmem[] array. 127 */ 128 struct pmap_physseg { 129 struct pv_header *pvheader; /* pv table for this seg */ 130 }; 131 132 #endif /* _NEWS68K_VMPARAM_H_ */ 133