1 /* $NetBSD: vmparam.h,v 1.23 2008/08/06 19:13:45 matt 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 #ifndef __ASSEMBLER__ 48 #include <sys/simplelock.h> /* struct simplelock */ 49 #endif /* __ASSEMBLER__ */ 50 #include <arm/arm32/pte.h> /* pt_entry_t */ 51 52 #define USRSTACK VM_MAXUSER_ADDRESS 53 54 /* 55 * Note that MAXTSIZ can't be larger than 32M, otherwise the compiler 56 * would have to be changed to not generate "bl" instructions. 57 */ 58 #define MAXTSIZ (16*1024*1024) /* max text size */ 59 #ifndef DFLDSIZ 60 #define DFLDSIZ (128*1024*1024) /* initial data size limit */ 61 #endif 62 #ifndef MAXDSIZ 63 #define MAXDSIZ (512*1024*1024) /* max data size */ 64 #endif 65 #ifndef DFLSSIZ 66 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 67 #endif 68 #ifndef MAXSSIZ 69 #define MAXSSIZ (8*1024*1024) /* max stack size */ 70 #endif 71 72 /* 73 * Size of SysV shared memory map 74 */ 75 #ifndef SHMMAXPGS 76 #define SHMMAXPGS 1024 77 #endif 78 79 /* 80 * While the ARM architecture defines Section mappings, large pages, 81 * and small pages, the standard page size is (and will always be) 4K. 82 */ 83 #define PAGE_SHIFT 12 84 #define PAGE_SIZE (1 << PAGE_SHIFT) 85 #define PAGE_MASK (PAGE_SIZE - 1) 86 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 94 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) KERNEL_BASE) 95 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t) 0xffffffff) 96 97 #ifndef __ASSEMBLER__ 98 /* XXX max. amount of KVM to be used by buffers. */ 99 #ifndef VM_MAX_KERNEL_BUF 100 extern vaddr_t virtual_avail; 101 extern vaddr_t virtual_end; 102 103 #define VM_MAX_KERNEL_BUF \ 104 ((virtual_end - virtual_avail) * 4 / 10) 105 #endif 106 107 /* 108 * pmap-specific data store in the vm_page structure. 109 */ 110 #define __HAVE_VM_PAGE_MD 111 struct vm_page_md { 112 SLIST_HEAD(,pv_entry) pvh_list; /* pv_entry list */ 113 struct simplelock pvh_slock; /* lock on this head */ 114 int pvh_attrs; /* page attributes */ 115 u_int uro_mappings; 116 u_int urw_mappings; 117 union { 118 u_short s_mappings[2]; /* Assume kernel count <= 65535 */ 119 u_int i_mappings; 120 } k_u; 121 #define kro_mappings k_u.s_mappings[0] 122 #define krw_mappings k_u.s_mappings[1] 123 #define k_mappings k_u.i_mappings 124 }; 125 126 /* 127 * Set the default color of each page. 128 */ 129 #if ARM_MMU_V6 > 0 130 #define VM_MDPAGE_PVH_ATTRS_INIT(pg) \ 131 (pg)->mdpage.pvh_attrs = (pg)->phys_addr & arm_cache_prefer_mask 132 #else 133 #define VM_MDPAGE_PVH_ATTRS_INIT(pg) \ 134 (pg)->mdpage.pvh_attrs = 0 135 #endif 136 137 138 #define VM_MDPAGE_INIT(pg) \ 139 do { \ 140 SLIST_INIT(&(pg)->mdpage.pvh_list); \ 141 simple_lock_init(&(pg)->mdpage.pvh_slock); \ 142 VM_MDPAGE_PVH_ATTRS_INIT(pg); \ 143 (pg)->mdpage.uro_mappings = 0; \ 144 (pg)->mdpage.urw_mappings = 0; \ 145 (pg)->mdpage.k_mappings = 0; \ 146 } while (/*CONSTCOND*/0) 147 #endif /* __ASSEMBLER__ */ 148 149 #endif /* _KERNEL */ 150 151 #endif /* _ARM_ARM32_VMPARAM_H_ */ 152