1 /* $OpenBSD: vmparam.h,v 1.4 2008/06/24 21:24:03 deraadt Exp $ */ 2 /* $NetBSD: vmparam.h,v 1.18 2003/05/21 18:04:44 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 2001, 2002 Wasabi Systems, Inc. 6 * All rights reserved. 7 * 8 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed for the NetBSD Project by 21 * Wasabi Systems, Inc. 22 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 23 * or promote products derived from this software without specific prior 24 * written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #ifndef _ARM_ARM_VMPARAM_H_ 40 #define _ARM_ARM_VMPARAM_H_ 41 42 #ifdef _KERNEL 43 44 /* 45 * Virtual Memory parameters common to all arm32 platforms. 46 */ 47 48 #include <sys/lock.h> /* struct simplelock */ 49 #include <arm/pte.h> /* pt_entry_t */ 50 #endif /* _KERNEL */ 51 52 #define USRTEXT VM_MIN_ADDRESS 53 #define USRSTACK VM_MAXUSER_ADDRESS 54 #define KERNBASE VM_MAXUSER_ADDRESS 55 56 /* 57 * Note that MAXTSIZ can't be larger than 32M, otherwise the compiler 58 * would have to be changed to not generate "bl" instructions. 59 */ 60 #define MAXTSIZ (16*1024*1024) /* max text size */ 61 #ifndef DFLDSIZ 62 #define DFLDSIZ (128*1024*1024) /* initial data size limit */ 63 #endif 64 #ifndef MAXDSIZ 65 #define MAXDSIZ (512*1024*1024) /* max data size */ 66 #endif 67 #ifndef DFLSSIZ 68 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 69 #endif 70 #ifndef MAXSSIZ 71 #define MAXSSIZ (8*1024*1024) /* max stack size */ 72 #endif 73 74 #define STACKGAP_RANDOM 256*1024 75 76 /* 77 * Size of SysV shared memory map 78 */ 79 #ifndef SHMMAXPGS 80 #define SHMMAXPGS 1024 81 #endif 82 83 /* 84 * While the ARM architecture defines Section mappings, large pages, 85 * and small pages, the standard page size is (and will always be) 4K. 86 */ 87 #define PAGE_SHIFT 12 88 #define PAGE_SIZE (1 << PAGE_SHIFT) /* bytes/page */ 89 #define PAGE_MASK (PAGE_SIZE - 1) 90 91 /* 92 * Mach derived constants 93 */ 94 #define VM_MIN_ADDRESS ((vaddr_t) PAGE_SIZE) 95 #define VM_MAXUSER_ADDRESS ((vaddr_t) ARM_KERNEL_BASE) 96 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 97 98 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) ARM_KERNEL_BASE) 99 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t) 0xffffffff) 100 101 #ifdef _KERNEL 102 103 /* XXX max. amount of KVM to be used by buffers. */ 104 #ifndef VM_MAX_KERNEL_BUF 105 extern vaddr_t virtual_avail; 106 extern vaddr_t virtual_end; 107 108 #define VM_MAX_KERNEL_BUF \ 109 ((virtual_end - virtual_avail) * 4 / 10) 110 #endif 111 112 /* 113 * pmap-specific data store in the vm_page structure. 114 */ 115 #define __HAVE_VM_PAGE_MD 116 struct vm_page_md { 117 struct pv_entry *pvh_list; /* pv_entry list */ 118 struct simplelock pvh_slock; /* lock on this head */ 119 int pvh_attrs; /* page attributes */ 120 u_int uro_mappings; 121 u_int urw_mappings; 122 union { 123 u_short s_mappings[2]; /* Assume kernel count <= 65535 */ 124 u_int i_mappings; 125 } k_u; 126 #define kro_mappings k_u.s_mappings[0] 127 #define krw_mappings k_u.s_mappings[1] 128 #define k_mappings k_u.i_mappings 129 }; 130 131 #define VM_MDPAGE_INIT(pg) \ 132 do { \ 133 (pg)->mdpage.pvh_list = NULL; \ 134 simple_lock_init(&(pg)->mdpage.pvh_slock); \ 135 (pg)->mdpage.pvh_attrs = 0; \ 136 (pg)->mdpage.uro_mappings = 0; \ 137 (pg)->mdpage.urw_mappings = 0; \ 138 (pg)->mdpage.k_mappings = 0; \ 139 } while (/*CONSTCOND*/0) 140 141 #endif /* _KERNEL */ 142 143 #endif /* _ARM_ARM_VMPARAM_H_ */ 144