sys/vm/pmap.h

   1 /*
   2  * Copyright (c) 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * The Mach Operating System project at Carnegie-Mellon University.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      from: @(#)pmap.h        8.1 (Berkeley) 6/11/93
  33  *
  34  *
  35  * Copyright (c) 1987, 1990 Carnegie-Mellon University.
  36  * All rights reserved.
  37  *
  38  * Author: Avadis Tevanian, Jr.
  39  *
  40  * Permission to use, copy, modify and distribute this software and
  41  * its documentation is hereby granted, provided that both the copyright
  42  * notice and this permission notice appear in all copies of the
  43  * software, derivative works or modified versions, and any portions
  44  * thereof, and that both notices appear in supporting documentation.
  45  *
  46  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  47  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
  48  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  49  *
  50  * Carnegie Mellon requests users of this software to return to
  51  *
  52  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  53  *  School of Computer Science
  54  *  Carnegie Mellon University
  55  *  Pittsburgh PA 15213-3890
  56  *
  57  * any improvements or extensions that they make and grant Carnegie the
  58  * rights to redistribute these changes.
  59  *
  60  * $FreeBSD: src/sys/vm/pmap.h,v 1.33.2.4 2002/03/06 22:44:24 silby Exp $
  61  */
  62
  63 /*
  64  *      Machine address mapping definitions -- machine-independent
  65  *      section.  [For machine-dependent section, see "machine/pmap.h".]
  66  */
  67
  68 #ifndef _VM_PMAP_H_
  69 #define _VM_PMAP_H_
  70
  71 #ifndef _SYS_TYPES_H_
  72 #include <sys/types.h>
  73 #endif
  74
  75 #ifndef _SYS_SPINLOCK_H_
  76 #include <sys/spinlock.h>
  77 #endif
  78
  79 #ifndef _MACHINE_PMAP_H_
  80 #include <machine/pmap.h>
  81 #endif
  82
  83 #ifdef _KERNEL
  84
  85 #ifndef _VM_VM_H_
  86 #include <vm/vm.h>
  87 #endif
  88
  89 struct lwp;
  90 struct proc;
  91 struct thread;
  92 struct vm_page;
  93 struct vmspace;
  94 struct vmspace_entry;
  95 struct vm_map_entry;
  96
  97 struct pmap_pgscan_info {
  98         struct pmap     *pmap;
  99         vm_offset_t     beg_addr;
 100         vm_offset_t     end_addr;
 101         vm_offset_t     offset;
 102         vm_pindex_t     limit;
 103         vm_pindex_t     busycount;
 104         vm_pindex_t     cleancount;
 105         vm_pindex_t     actioncount;
 106         int             (*callback)(struct pmap_pgscan_info *,
 107                                     vm_offset_t va,
 108                                     struct vm_page *);
 109 };
 110
 111 typedef struct vm_phystable {
 112         vm_paddr_t      phys_beg;
 113         vm_paddr_t      phys_end;
 114         uint32_t        flags;
 115         uint32_t        affinity;
 116 } vm_phystable_t;
 117
 118 /*
 119  * Most of these variables represent parameters set up by low level MD kernel
 120  * boot code to be used by higher level MI initialization code to identify
 121  * the portions of kernel and physical memory which are free for allocation.
 122  *
 123  * KvaStart/KvaEnd/     - Reserved Kernel Virtual Memory address space.
 124  * KvaSize                This range represents the entire KVA space but
 125  *                        might omit certain special mapping areas.  It is
 126  *                        used to determine what kernel memory userland has
 127  *                        access to.
 128  *
 129  * DMapMaxAddress       - Maximum virtual address for DMap (not physical addr).
 130  *                        We do not allocate the entire space from
 131  *                        DMAP_MIN_ADDRESS to DMAP_MAX_ADDRESS.
 132  *
 133  * virtual_{start,end}  - KVA space available for allocation, not including
 134  *                        KVA space reserved during MD startup.  Used by
 135  *                        the KMEM subsystem, used to initialize kernel_map.
 136  *
 137  * phys_avail[]         - Array of {start,end} physical addresses, not
 138  *                        including physical memory allocated by MD startup
 139  *                        code.  Used to initialize the VM subsystem.
 140  */
 141 extern vm_offset_t KvaStart;
 142 extern vm_offset_t KvaEnd;
 143 extern vm_offset_t KvaSize;
 144 extern vm_offset_t DMapMaxAddress;
 145 extern vm_offset_t virtual_start;
 146 extern vm_offset_t virtual_end;
 147 extern vm_offset_t virtual2_start;
 148 extern vm_offset_t virtual2_end;
 149 extern vm_phystable_t phys_avail[];
 150 extern vm_phystable_t dump_avail[];
 151
 152 /*
 153  * High-level pmap scan
 154  */
 155 void pmap_pgscan(struct pmap_pgscan_info *info);
 156
 157 /*
 158  * Return true if the passed address is in the kernel address space.
 159  * This is mainly a check that the address is NOT in the user address space.
 160  *
 161  * For a vkernels all addresses are in the kernel address space.
 162  */
 163 static inline int
 164 kva_p(const void *addr)
 165 {
 166 #ifdef _KERNEL_VIRTUAL
 167         return (addr != NULL);
 168 #else
 169         return ((unsigned long)KvaStart <= (unsigned long)addr) &&
 170                 ((unsigned long)addr < (unsigned long)KvaEnd);
 171 #endif
 172 }
 173
 174 vm_page_t        pmap_unwire (pmap_t, vm_offset_t);
 175 void             pmap_clear_modify (struct vm_page *m);
 176 void             pmap_clear_reference (struct vm_page *m);
 177 void             pmap_collect (void);
 178 void             pmap_copy (pmap_t, pmap_t, vm_offset_t, vm_size_t,
 179                         vm_offset_t);
 180 void             pmap_copy_page (vm_paddr_t, vm_paddr_t);
 181 void             pmap_copy_page_frag (vm_paddr_t, vm_paddr_t, size_t bytes);
 182 void             pmap_enter (pmap_t, vm_offset_t, struct vm_page *,
 183                         vm_prot_t, boolean_t, struct vm_map_entry *);
 184 void             pmap_maybethreaded(pmap_t);
 185 int              pmap_mapped_sync(vm_page_t m);
 186 vm_page_t        pmap_fault_page_quick(pmap_t, vm_offset_t, vm_prot_t, int *);
 187 vm_paddr_t       pmap_extract (pmap_t pmap, vm_offset_t va, void **handlep);
 188 void             pmap_extract_done (void *handle);
 189 void             pmap_growkernel (vm_offset_t, vm_offset_t);
 190 void             pmap_init (void);
 191 boolean_t        pmap_is_modified (struct vm_page *m);
 192 int              pmap_ts_referenced (struct vm_page *m);
 193 vm_offset_t      pmap_map (vm_offset_t *, vm_paddr_t, vm_paddr_t, int);
 194 void             pmap_object_init_pt (pmap_t pmap, struct vm_map_entry *entry,
 195                         vm_offset_t addr, vm_offset_t size, int pagelimit);
 196 void             pmap_page_protect (struct vm_page *m, vm_prot_t prot);
 197 void             pmap_page_init (struct vm_page *m);
 198 vm_paddr_t       uservtophys(vm_offset_t va);
 199 vm_paddr_t       pmap_phys_address (vm_pindex_t);
 200 void             pmap_pinit (pmap_t);
 201 void             pmap_puninit (pmap_t);
 202 void             pmap_pinit0 (pmap_t);
 203 void             pmap_pinit2 (pmap_t);
 204 void             pmap_ept_transform (pmap_t, int);
 205 void             pmap_npt_transform (pmap_t, int);
 206 void             pmap_protect (pmap_t, vm_offset_t, vm_offset_t, vm_prot_t);
 207 void             pmap_remove_specific (pmap_t, vm_page_t);
 208 void             pmap_qenter (vm_offset_t, struct vm_page **, int);
 209 void             pmap_qenter_noinval (vm_offset_t, struct vm_page **, int);
 210 void             pmap_qremove (vm_offset_t, int);
 211 void             pmap_qremove_quick (vm_offset_t, int);
 212 void             pmap_qremove_noinval (vm_offset_t, int);
 213 void             pmap_kenter (vm_offset_t, vm_paddr_t);
 214 int              pmap_kenter_quick (vm_offset_t, vm_paddr_t);
 215 int              pmap_kenter_noinval (vm_offset_t, vm_paddr_t);
 216 void             pmap_kmodify_rw(vm_offset_t va);
 217 void             pmap_kmodify_nc(vm_offset_t va);
 218 void             pmap_kremove (vm_offset_t);
 219 void             pmap_kremove_quick (vm_offset_t);
 220 void             pmap_kremove_noinval (vm_offset_t);
 221 void             pmap_reference (pmap_t);
 222 void             pmap_remove (pmap_t, vm_offset_t, vm_offset_t);
 223 void             pmap_remove_pages (pmap_t, vm_offset_t, vm_offset_t);
 224 void             pmap_zero_page (vm_paddr_t);
 225 void             pmap_zero_page_area (vm_paddr_t, int off, int size);
 226 int              pmap_prefault_ok (pmap_t, vm_offset_t);
 227 void             pmap_change_attr(vm_offset_t va, vm_size_t count, int mode);
 228 int              pmap_mincore (pmap_t pmap, vm_offset_t addr);
 229 void             pmap_init_proc (struct proc *);
 230 void             pmap_init_thread (struct thread *td);
 231 void             pmap_replacevm (struct proc *, struct vmspace *, int);
 232 void             pmap_setlwpvm (struct lwp *, struct vmspace *);
 233 vm_paddr_t       pmap_kextract(vm_offset_t);
 234 void             pmap_invalidate_range(pmap_t, vm_offset_t, vm_offset_t);
 235
 236 void             pmap_add_cpu(struct vmspace *vm, int cpuid);
 237 void             pmap_del_cpu(struct vmspace *vm, int cpuid);
 238 void             pmap_del_all_cpus(struct vmspace *vm);
 239
 240 vm_offset_t      pmap_addr_hint (vm_object_t obj, vm_offset_t addr, vm_size_t size);
 241 void            *pmap_kenter_temporary (vm_paddr_t pa, long i);
 242 void             pmap_init2 (void);
 243 struct vm_page  *pmap_kvtom(vm_offset_t va);
 244 void             pmap_object_init(vm_object_t object);
 245 void             pmap_object_free(vm_object_t object);
 246 void             smap_smep_disable(void);
 247 void             smap_smep_enable(void);
 248
 249 #define vtophys(va)     pmap_kextract(((vm_offset_t)(va)))
 250 #define vtophys_pte(va) ((pt_entry_t)pmap_kextract(((vm_offset_t)(va))))
 251
 252 #endif /* _KERNEL */
 253
 254 #endif /* _VM_PMAP_H_ */