root/kern/include/vm.h

INCLUDED FROM

   1 /*
   2  * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
   3  *      The President and Fellows of Harvard College.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  30 #ifndef _VM_H_
  31 #define _VM_H_
  33 /*
  34  * VM system-related definitions.
  35  *
  36  * You'll probably want to add stuff here.
  37  */
  40 #include <machine/vm.h>
  42 /* Fault-type arguments to vm_fault() */
  43 #define VM_FAULT_READ        0    /* A read was attempted */
  44 #define VM_FAULT_WRITE       1    /* A write was attempted */
  45 #define VM_FAULT_READONLY    2    /* A write to a readonly page was attempted*/
  48 /* Initialization function */
  49 void vm_bootstrap(void);
  51 /* Fault handling function called by trap code */
  52 int vm_fault(int faulttype, vaddr_t faultaddress);
  54 /* Allocate/free kernel heap pages (called by kmalloc/kfree) */
vaddr_t alloc_kpages(int npages);
  56 void free_kpages(vaddr_t addr);
  58 /* TLB shootdown handling called from interprocessor_interrupt */
  59 void vm_tlbshootdown_all(void);
  60 void vm_tlbshootdown(const struct tlbshootdown *);
  63 #endif /* _VM_H_ */