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