FreeBSD/Linux Kernel Cross Reference
sys/vm/pmap.h

     /*
      * Copyright (c) 1991, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * This code is derived from software contributed to Berkeley by
      * The Mach Operating System project at Carnegie-Mellon University.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      from: @(#)pmap.h        8.1 (Berkeley) 6/11/93
     *
     *
     * Copyright (c) 1987, 1990 Carnegie-Mellon University.
     * All rights reserved.
     *
     * Author: Avadis Tevanian, Jr.
     *
     * Permission to use, copy, modify and distribute this software and
     * its documentation is hereby granted, provided that both the copyright
     * notice and this permission notice appear in all copies of the
     * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     *
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     *
     * Carnegie Mellon requests users of this software to return to
     *
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     *
     * any improvements or extensions that they make and grant Carnegie the
     * rights to redistribute these changes.
     *
     * $FreeBSD: src/sys/vm/pmap.h,v 1.33.2.4 2002/03/06 22:44:24 silby Exp $
     * $DragonFly: src/sys/vm/pmap.h,v 1.29 2008/08/25 17:01:42 dillon Exp $
     */
    
    /*
     *      Machine address mapping definitions -- machine-independent
     *      section.  [For machine-dependent section, see "machine/pmap.h".]
     */
    
    #ifndef _VM_PMAP_H_
    #define _VM_PMAP_H_
    
    #ifndef _SYS_TYPES_H_
    #include <sys/types.h>
    #endif
    
    #ifndef _SYS_SPINLOCK_H_
    #include <sys/spinlock.h>
    #endif
    
    #ifndef _MACHINE_PMAP_H_
    #include <machine/pmap.h>
    #endif
    
    #ifdef _KERNEL
    
    #ifndef _VM_VM_H_
    #include <vm/vm.h>
    #endif
    
    struct lwp;
    struct proc;
    struct thread;
    struct vm_page;
    struct vmspace;
    struct vmspace_entry;
   struct vm_map_entry;
   
   /*
    * Most of these variables represent parameters set up by low level MD kernel
    * boot code to be used by higher level MI initialization code to identify
    * the portions of kernel and physical memory which are free for allocation.
    *
    * KvaStart/KvaEnd/     - Reserved Kernel Virtual Memory address space.
    * KvaSize                This range represents the entire KVA space but
    *                        might omit certain special mapping areas.  It is
    *                        used to determine what kernel memory userland has
    *                        access to.
    *
    * virtual_{start,end}  - KVA space available for allocation, not including
    *                        KVA space reserved during MD startup.  Used by
    *                        the KMEM subsystem, used to initialize kernel_map.
    *
    * phys_avail[]         - Array of {start,end} physical addresses, not
    *                        including physical memory allocated by MD startup
    *                        code.  Used to initialize the VM subsystem.
    */
   extern vm_offset_t KvaStart;
   extern vm_offset_t KvaEnd;
   extern vm_offset_t KvaSize;
   extern vm_offset_t virtual_start;
   extern vm_offset_t virtual_end;
   extern vm_offset_t virtual2_start;
   extern vm_offset_t virtual2_end;
   extern vm_paddr_t phys_avail[]; 
   
   /*
    * Return true if the passed address is in the kernel address space.
    * This is mainly a check that the address is NOT in the user address space.
    *
    * For a vkernels all addresses are in the kernel address space.
    */
   static inline int
   kva_p(const void *addr)
   {
   #ifdef _KERNEL_VIRTUAL
           return (addr != NULL);
   #else
           return ((unsigned long)KvaStart <= (unsigned long)addr) &&
                   ((unsigned long)addr < (unsigned long)KvaEnd);
   #endif
   }
   
   void             pmap_change_wiring (pmap_t, vm_offset_t, boolean_t,
                           vm_map_entry_t);
   void             pmap_clear_modify (struct vm_page *m);
   void             pmap_clear_reference (struct vm_page *m);
   void             pmap_collect (void);
   void             pmap_copy (pmap_t, pmap_t, vm_offset_t, vm_size_t,
                           vm_offset_t);
   void             pmap_copy_page (vm_paddr_t, vm_paddr_t);
   void             pmap_copy_page_frag (vm_paddr_t, vm_paddr_t, size_t bytes);
   void             pmap_enter (pmap_t, vm_offset_t, struct vm_page *,
                           vm_prot_t, boolean_t, struct vm_map_entry *);
   void             pmap_enter_quick (pmap_t, vm_offset_t, struct vm_page *);
   vm_page_t        pmap_fault_page_quick(pmap_t, vm_offset_t, vm_prot_t);
   vm_paddr_t       pmap_extract (pmap_t pmap, vm_offset_t va);
   void             pmap_growkernel (vm_offset_t, vm_offset_t);
   void             pmap_init (void);
   boolean_t        pmap_is_modified (struct vm_page *m);
   boolean_t        pmap_ts_referenced (struct vm_page *m);
   vm_offset_t      pmap_map (vm_offset_t *, vm_paddr_t, vm_paddr_t, int);
   void             pmap_object_init_pt (pmap_t pmap, vm_offset_t addr,
                       vm_prot_t prot, vm_object_t object, vm_pindex_t pindex,
                       vm_offset_t size, int pagelimit);
   boolean_t        pmap_page_exists_quick (pmap_t pmap, struct vm_page *m);
   void             pmap_page_protect (struct vm_page *m, vm_prot_t prot);
   void             pmap_page_init (struct vm_page *m);
   vm_paddr_t       pmap_phys_address (vm_pindex_t);
   void             pmap_pinit (pmap_t);
   void             pmap_puninit (pmap_t);
   void             pmap_pinit0 (pmap_t);
   void             pmap_pinit2 (pmap_t);
   void             pmap_protect (pmap_t, vm_offset_t, vm_offset_t, vm_prot_t);
   void             pmap_qenter (vm_offset_t, struct vm_page **, int);
   void             pmap_qremove (vm_offset_t, int);
   void             pmap_kenter (vm_offset_t, vm_paddr_t);
   void             pmap_kenter_quick (vm_offset_t, vm_paddr_t);
   void             pmap_kenter_sync (vm_offset_t);
   void             pmap_kenter_sync_quick (vm_offset_t);
   void             pmap_kmodify_rw(vm_offset_t va);
   void             pmap_kmodify_nc(vm_offset_t va);
   void             pmap_kremove (vm_offset_t);
   void             pmap_kremove_quick (vm_offset_t);
   void             pmap_reference (pmap_t);
   void             pmap_remove (pmap_t, vm_offset_t, vm_offset_t);
   void             pmap_remove_pages (pmap_t, vm_offset_t, vm_offset_t);
   void             pmap_zero_page (vm_paddr_t);
   void             pmap_page_assertzero (vm_paddr_t);
   void             pmap_zero_page_area (vm_paddr_t, int off, int size);
   int              pmap_prefault_ok (pmap_t, vm_offset_t);
   void             pmap_change_attr(vm_offset_t va, vm_size_t count, int mode);
   int              pmap_mincore (pmap_t pmap, vm_offset_t addr);
   void             pmap_init_proc (struct proc *);
   void             pmap_init_thread (struct thread *td);
   void             pmap_replacevm (struct proc *, struct vmspace *, int);
   void             pmap_setlwpvm (struct lwp *, struct vmspace *);
   
   vm_offset_t      pmap_addr_hint (vm_object_t obj, vm_offset_t addr, vm_size_t size);
   void            *pmap_kenter_temporary (vm_paddr_t pa, long i);
   void             pmap_init2 (void);
   struct vm_page  *pmap_kvtom(vm_offset_t va);
   void             pmap_object_init(vm_object_t object);
   void             pmap_object_free(vm_object_t object);
   
   
   #endif /* _KERNEL */
   
   #endif /* _VM_PMAP_H_ */

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