1 /* $NetBSD: vmparam.h,v 1.40 2019/06/28 15:17:43 tsutsui 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 _HP300_VMPARAM_H_ 42 #define _HP300_VMPARAM_H_ 43 44 /* 45 * Machine dependent constants for HP300 46 */ 47 48 /* 49 * hp300 pmap derived m68k ports can use 4K or 8K pages. 50 * (except HPMMU machines) 51 * The page size is specified by PGSHIFT in <machine/param.h>. 52 * Override the PAGE_* definitions to be compile-time constants. 53 */ 54 #define PAGE_SHIFT PGSHIFT 55 #define PAGE_SIZE (1 << PAGE_SHIFT) 56 #define PAGE_MASK (PAGE_SIZE - 1) 57 58 /* 59 * USRSTACK is the top (end) of the user stack. 60 * 61 * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3) 62 * is for HPUX compatibility. Why?? Because HPUX's debuggers 63 * have the user's stack hard-wired at FFF00000 for post-mortems, 64 * and we must be compatible... 65 */ 66 #define USRSTACK (-HIGHPAGES*PAGE_SIZE) /* Start of user stack */ 67 #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */ 68 #define P1PAGES 0x100000 69 #define HIGHPAGES (0x100000/PAGE_SIZE) 70 71 /* 72 * Virtual memory related constants, all in bytes 73 */ 74 #ifndef MAXTSIZ 75 #define MAXTSIZ (32*1024*1024) /* max text size */ 76 #endif 77 #ifndef DFLDSIZ 78 #define DFLDSIZ (32*1024*1024) /* initial data size limit */ 79 #endif 80 #ifndef MAXDSIZ 81 #define MAXDSIZ (256*1024*1024) /* max data size */ 82 #endif 83 #ifndef DFLSSIZ 84 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 85 #endif 86 #ifndef MAXSSIZ 87 #define MAXSSIZ MAXDSIZ /* max stack size */ 88 #endif 89 90 /* 91 * PTEs for mapping user space into the kernel for phyio operations. 92 * One page is enough to handle 4Mb of simultaneous raw IO operations. 93 */ 94 #ifndef USRIOSIZE 95 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 96 #endif 97 98 /* 99 * External IO space map size. 100 * By default we make it large enough to map up to 3 DIO-II devices and 101 * the complete DIO space. For a 320-only configuration (which has no 102 * DIO-II) you could define a considerably smaller region. 103 */ 104 #ifndef EIOMAPSIZE 105 #define EIOMAPSIZE 3584 /* 14mb */ 106 #endif 107 108 /* 109 * Mach derived constants 110 */ 111 112 /* user/kernel map constants */ 113 #define VM_MIN_ADDRESS ((vaddr_t)0) 114 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) 115 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 116 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 117 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-PAGE_SIZE*NPTEPG*2)) 118 119 /* virtual sizes (bytes) for various kernel submaps */ 120 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 121 122 /* # of kernel PT pages (initial only, can grow dynamically) */ 123 #define VM_KERNEL_PT_PAGES ((vsize_t)2) 124 125 /* 126 * Constants which control the way the VM system deals with memory segments. 127 * The hp300 only has one physical memory segment. 128 */ 129 #define VM_PHYSSEG_MAX 1 130 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 131 132 #define VM_NFREELIST 1 133 #define VM_FREELIST_DEFAULT 0 134 135 #define __HAVE_PMAP_PHYSSEG 136 137 /* 138 * pmap-specific data stored in the vm_physmem[] array. 139 */ 140 struct pmap_physseg { 141 struct pv_header *pvheader; /* pv table for this seg */ 142 }; 143 144 #endif /* _HP300_VMPARAM_H_ */ 145