1 /* $NetBSD: vmparam.h,v 1.19 2003/05/22 05:25:48 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 /* 86 * Mach derived constants 87 */ 88 #define VM_MIN_ADDRESS ((vaddr_t) 0x00001000) 89 #define VM_MAXUSER_ADDRESS ((vaddr_t) KERNEL_BASE) 90 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 91 92 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) KERNEL_BASE) 93 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t) 0xffffffff) 94 95 /* XXX max. amount of KVM to be used by buffers. */ 96 #ifndef VM_MAX_KERNEL_BUF 97 extern vaddr_t virtual_avail; 98 extern vaddr_t virtual_end; 99 100 #define VM_MAX_KERNEL_BUF \ 101 ((virtual_end - virtual_avail) * 4 / 10) 102 #endif 103 104 /* 105 * pmap-specific data store in the vm_page structure. 106 */ 107 #define __HAVE_VM_PAGE_MD 108 struct vm_page_md { 109 struct pv_entry *pvh_list; /* pv_entry list */ 110 struct simplelock pvh_slock; /* lock on this head */ 111 int pvh_attrs; /* page attributes */ 112 u_int uro_mappings; 113 u_int urw_mappings; 114 union { 115 u_short s_mappings[2]; /* Assume kernel count <= 65535 */ 116 u_int i_mappings; 117 } k_u; 118 #define kro_mappings k_u.s_mappings[0] 119 #define krw_mappings k_u.s_mappings[1] 120 #define k_mappings k_u.i_mappings 121 }; 122 123 #define VM_MDPAGE_INIT(pg) \ 124 do { \ 125 (pg)->mdpage.pvh_list = NULL; \ 126 simple_lock_init(&(pg)->mdpage.pvh_slock); \ 127 (pg)->mdpage.pvh_attrs = 0; \ 128 (pg)->mdpage.uro_mappings = 0; \ 129 (pg)->mdpage.urw_mappings = 0; \ 130 (pg)->mdpage.k_mappings = 0; \ 131 } while (/*CONSTCOND*/0) 132 133 #endif /* _KERNEL */ 134 135 #endif /* _ARM_ARM32_VMPARAM_H_ */ 136