1 /* $NetBSD: vmparam.h,v 1.15 2003/05/02 23:26:47 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #ifndef _ARM_ARM32_VMPARAM_H_ 39 #define _ARM_ARM32_VMPARAM_H_ 40 41 #ifdef _KERNEL 42 43 /* 44 * Virtual Memory parameters common to all arm32 platforms. 45 */ 46 47 #include <sys/lock.h> /* struct simplelock */ 48 #include <arm/arm32/pte.h> /* pt_entry_t */ 49 50 #define USRSTACK VM_MAXUSER_ADDRESS 51 52 /* 53 * Note that MAXTSIZ can't be larger than 32M, otherwise the compiler 54 * would have to be changed to not generate "bl" instructions. 55 */ 56 #define MAXTSIZ (16*1024*1024) /* max text size */ 57 #ifndef DFLDSIZ 58 #define DFLDSIZ (128*1024*1024) /* initial data size limit */ 59 #endif 60 #ifndef MAXDSIZ 61 #define MAXDSIZ (512*1024*1024) /* max data size */ 62 #endif 63 #ifndef DFLSSIZ 64 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 65 #endif 66 #ifndef MAXSSIZ 67 #define MAXSSIZ (8*1024*1024) /* max stack size */ 68 #endif 69 70 /* 71 * Size of SysV shared memory map 72 */ 73 #ifndef SHMMAXPGS 74 #define SHMMAXPGS 1024 75 #endif 76 77 /* 78 * While the ARM architecture defines Section mappings, large pages, 79 * and small pages, the standard page size is (and will always be) 4K. 80 */ 81 #define PAGE_SHIFT 12 82 #define PAGE_SIZE (1 << PAGE_SHIFT) 83 #define PAGE_MASK (PAGE_SIZE - 1) 84 85 #ifndef ARM32_NEW_VM_LAYOUT 86 #ifdef ARM32_PMAP_NEW 87 /* 88 * Mach derived constants 89 */ 90 #define VM_MIN_ADDRESS ((vaddr_t) 0x00001000) 91 #define VM_MAXUSER_ADDRESS ((vaddr_t) KERNEL_BASE) 92 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 93 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) KERNEL_TEXT_BASE) 94 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t) 0xffffffff) 95 #else /* ! ARM32_PMAP_NEW */ 96 /* 97 * Linear page table space: number of PTEs required to map the 4G address 98 * space * size of each PTE. 99 */ 100 #define PAGE_TABLE_SPACE ((1 << (32 - PGSHIFT)) * sizeof(pt_entry_t)) 101 102 /* Address where the page talbles are mapped. */ 103 #define PTE_BASE (KERNEL_BASE - PAGE_TABLE_SPACE) 104 105 /* 106 * Mach derived constants 107 */ 108 #define VM_MIN_ADDRESS ((vaddr_t) 0x00001000) 109 #define VM_MAXUSER_ADDRESS ((vaddr_t) (PTE_BASE - UPAGES * PAGE_SIZE)) 110 #define VM_MAX_ADDRESS ((vaddr_t) (PTE_BASE + \ 111 (KERNEL_BASE >> PGSHIFT) * \ 112 sizeof(pt_entry_t))) 113 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) KERNEL_TEXT_BASE) 114 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t) 0xffffffff) 115 #endif /* ARM32_PMAP_NEW */ 116 117 #else /* ARM32_NEW_VM_LAYOUT */ 118 /* 119 * New VM layout 120 */ 121 #define VM_MIN_ADDRESS ((vaddr_t) 0x00001000) 122 #define VM_MAXUSER_ADDRESS ((vaddr_t) KERNEL_BASE) 123 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 124 125 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) KERNEL_BASE) 126 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t) 0xffffffff) 127 #endif /* ARM32_NEW_VM_LAYOUT */ 128 129 /* 130 * pmap-specific data store in the vm_page structure. 131 */ 132 #define __HAVE_VM_PAGE_MD 133 struct vm_page_md { 134 struct pv_entry *pvh_list; /* pv_entry list */ 135 struct simplelock pvh_slock; /* lock on this head */ 136 int pvh_attrs; /* page attributes */ 137 #ifndef ARM32_PMAP_NEW 138 #ifdef PMAP_ALIAS_DEBUG 139 u_int ro_mappings; 140 u_int rw_mappings; 141 u_int kro_mappings; 142 u_int krw_mappings; 143 #endif /* PMAP_ALIAS_DEBUG */ 144 #else /* ARM32_PMAP_NEW */ 145 u_int uro_mappings; 146 u_int urw_mappings; 147 union { 148 u_short s_mappings[2]; /* Assume kernel count <= 65535 */ 149 u_int i_mappings; 150 } k_u; 151 #define kro_mappings k_u.s_mappings[0] 152 #define krw_mappings k_u.s_mappings[1] 153 #define k_mappings k_u.i_mappings 154 #endif 155 }; 156 157 #ifndef ARM32_PMAP_NEW 158 #define VM_MDPAGE_INIT(pg) \ 159 do { \ 160 (pg)->mdpage.pvh_list = NULL; \ 161 simple_lock_init(&(pg)->mdpage.pvh_slock); \ 162 (pg)->mdpage.pvh_attrs = 0; \ 163 } while (/*CONSTCOND*/0) 164 #else 165 #define VM_MDPAGE_INIT(pg) \ 166 do { \ 167 (pg)->mdpage.pvh_list = NULL; \ 168 simple_lock_init(&(pg)->mdpage.pvh_slock); \ 169 (pg)->mdpage.pvh_attrs = 0; \ 170 (pg)->mdpage.uro_mappings = 0; \ 171 (pg)->mdpage.urw_mappings = 0; \ 172 (pg)->mdpage.k_mappings = 0; \ 173 } while (/*CONSTCOND*/0) 174 #endif 175 176 #endif /* _KERNEL */ 177 178 #endif /* _ARM_ARM32_VMPARAM_H_ */ 179