osfmk/mach/i386/vm_param.h

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * @OSF_COPYRIGHT@
  25  */
  26 /*
  27  * Mach Operating System
  28  * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
  29  * All Rights Reserved.
  30  *
  31  * Permission to use, copy, modify and distribute this software and its
  32  * documentation is hereby granted, provided that both the copyright
  33  * notice and this permission notice appear in all copies of the
  34  * software, derivative works or modified versions, and any portions
  35  * thereof, and that both notices appear in supporting documentation.
  36  *
  37  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  38  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  39  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  40  *
  41  * Carnegie Mellon requests users of this software to return to
  42  *
  43  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  44  *  School of Computer Science
  45  *  Carnegie Mellon University
  46  *  Pittsburgh PA 15213-3890
  47  *
  48  * any improvements or extensions that they make and grant Carnegie Mellon
  49  * the rights to redistribute these changes.
  50  */
  51
  52 /*
  53  * Copyright (c) 1994 The University of Utah and
  54  * the Computer Systems Laboratory at the University of Utah (CSL).
  55  * All rights reserved.
  56  *
  57  * Permission to use, copy, modify and distribute this software is hereby
  58  * granted provided that (1) source code retains these copyright, permission,
  59  * and disclaimer notices, and (2) redistributions including binaries
  60  * reproduce the notices in supporting documentation, and (3) all advertising
  61  * materials mentioning features or use of this software display the following
  62  * acknowledgement: ``This product includes software developed by the
  63  * Computer Systems Laboratory at the University of Utah.''
  64  *
  65  * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
  66  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
  67  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  68  *
  69  * CSL requests users of this software to return to csl-dist@cs.utah.edu any
  70  * improvements that they make and grant CSL redistribution rights.
  71  *
  72  */
  73
  74 /*
  75  *      File:   vm_param.h
  76  *      Author: Avadis Tevanian, Jr.
  77  *      Date:   1985
  78  *
  79  *      I386 machine dependent virtual memory parameters.
  80  *      Most of the declarations are preceeded by I386_ (or i386_)
  81  *      which is OK because only I386 specific code will be using
  82  *      them.
  83  */
  84
  85 #ifndef _MACH_I386_VM_PARAM_H_
  86 #define _MACH_I386_VM_PARAM_H_
  87
  88 #define BYTE_SIZE               8               /* byte size in bits */
  89
  90 #define I386_PGBYTES    4096    /* bytes per 80386 page */
  91 #define I386_PGSHIFT    12              /* number of bits to shift for pages */
  92
  93 #define PAGE_SIZE               I386_PGBYTES
  94 #define PAGE_SHIFT              I386_PGSHIFT
  95 #define PAGE_MASK               (PAGE_SIZE - 1)
  96
  97 /*
  98  *      Convert bytes to pages and convert pages to bytes.
  99  *      No rounding is used.
 100  */
 101
 102 #define i386_btop(x)            (((pmap_paddr_t)(x)) >> I386_PGSHIFT)
 103 #define machine_btop(x)         i386_btop(x)
 104 #define i386_ptob(x)            (((pmap_paddr_t)(x)) << I386_PGSHIFT)
 105
 106 /*
 107  *      Round off or truncate to the nearest page.  These will work
 108  *      for either addresses or counts.  (i.e. 1 byte rounds to 1 page
 109  *      bytes.
 110  */
 111
 112 #define i386_round_page(x)      ((((pmap_paddr_t)(x)) + I386_PGBYTES - 1) & \
 113                                         ~(I386_PGBYTES-1))
 114 #define i386_trunc_page(x)      (((pmap_paddr_t)(x)) & ~(I386_PGBYTES-1))
 115
 116 #define VM_MAX_PAGE_ADDRESS     0x00000000C0000000ULL
 117
 118 /* system-wide values */
 119 #define MACH_VM_MIN_ADDRESS             ((mach_vm_offset_t) 0)
 120 #define MACH_VM_MAX_ADDRESS             ((mach_vm_offset_t) VM_MAX_PAGE_ADDRESS)
 121
 122 /* process-relative values (all 32-bit legacy only for now) */
 123 #define VM_MIN_ADDRESS          ((vm_offset_t) 0)
 124 #define VM_MAX_ADDRESS          ((vm_offset_t) (VM_MAX_PAGE_ADDRESS & 0xFFFFFFFF))
 125
 126 #ifdef  KERNEL_PRIVATE
 127
 128 /* Kernel-wide values */
 129 #define VM_MIN_KERNEL_ADDRESS   ((vm_offset_t) 0xC0000000U)
 130 #define VM_MAX_KERNEL_ADDRESS   ((vm_offset_t) 0xFfffffffU)
 131 #define KERNEL_STACK_SIZE               (I386_PGBYTES*4)
 132
 133 /* FIXME  - always leave like this? */
 134 #define INTSTACK_SIZE   (I386_PGBYTES*4)
 135
 136 #ifdef  MACH_KERNEL_PRIVATE
 137
 138 /* For implementing legacy 32-bit interfaces */
 139 #define VM32_SUPPORT
 140 #define VM32_MIN_ADDRESS                ((vm32_offset_t) 0)
 141 #define VM32_MAX_ADDRESS                ((vm32_offset_t) (VM_MAX_PAGE_ADDRESS & 0xFFFFFFFF))
 142
 143 #define LINEAR_KERNEL_ADDRESS   ((vm_offset_t) 0xc0000000)
 144
 145 #define VM_MIN_KERNEL_LOADED_ADDRESS    ((vm_offset_t) 0x0c000000U)
 146 #define VM_MAX_KERNEL_LOADED_ADDRESS    ((vm_offset_t) 0x1fffffffU)
 147
 148 /*
 149  *      Conversion between 80386 pages and VM pages
 150  */
 151
 152 #define trunc_i386_to_vm(p)     (atop(trunc_page(i386_ptob(p))))
 153 #define round_i386_to_vm(p)     (atop(round_page(i386_ptob(p))))
 154 #define vm_to_i386(p)           (i386_btop(ptoa(p)))
 155
 156 #define PMAP_ENTER(pmap, virtual_address, page, protection, flags, wired) \
 157         MACRO_BEGIN                                     \
 158         pmap_t __pmap = (pmap);                         \
 159         vm_page_t __page = (page);                      \
 160         vm_prot_t __prot__ =                            \
 161                 (protection) & ~(page)->page_lock;      \
 162                                                         \
 163         if (__pmap == kernel_pmap) {                    \
 164                 __prot__ |= VM_PROT_WRITE;              \
 165         } else {                                        \
 166                 assert(!__page->encrypted);             \
 167         }                                               \
 168                                                         \
 169         pmap_enter(                                     \
 170                 __pmap,                                 \
 171                 (virtual_address),                      \
 172                 __page->phys_page,                      \
 173                 __prot__,                               \
 174                 flags,                                  \
 175                 (wired)                                 \
 176          );                                             \
 177         MACRO_END
 178
 179 #endif  /* MACH_KERNEL_PRIVATE */
 180
 181 #endif  /* KERNEL_PRIVATE */
 182
 183 #endif  /* _MACH_I386_VM_PARAM_H_ */