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/*-
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 * Copyright (c) 2005-2009, Kohsuke Ohtani
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 * All rights reserved.
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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 author nor the names of any co-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 AUTHOR 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 AUTHOR 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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#include <types.h>
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#include <sys/cdefs.h>
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#include <sys/sysinfo.h>
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#include <sys/bootinfo.h>
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/*
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 * One structure per allocated segment.
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 */
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struct seg {
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        struct seg        *prev;                /* segment list sorted by address */
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        struct seg        *next;
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        struct seg        *sh_prev;        /* link for all shared segments */
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        struct seg        *sh_next;
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        vaddr_t                addr;                /* base address */
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        size_t                size;                /* size */
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        int                flags;                /* SEG_* flag */
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        paddr_t                phys;                /* physical address */
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};
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/* Flags for segment */
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#define SEG_READ        0x00000001
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#define SEG_WRITE        0x00000002
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#define SEG_EXEC        0x00000004
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#define SEG_SHARED        0x00000008
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#define SEG_MAPPED        0x00000010
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#define SEG_FREE        0x00000080
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/* Attribute for vm_attribute() */
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#define        PROT_NONE        0x0                /* pages cannot be accessed */
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#define        PROT_READ        0x1                /* pages can be read */
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#define        PROT_WRITE        0x2                /* pages can be written */
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#define        PROT_EXEC        0x4                /* pages can be executed */
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/*
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 * VM mapping per one task.
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 */
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struct vm_map {
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        struct seg        head;                /* list head of segements */
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        int                refcnt;                /* reference count */
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        pgd_t                pgd;                /* page directory */
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        size_t                total;                /* total used size */
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};
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__BEGIN_DECLS
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int         vm_allocate(task_t, void **, size_t, int);
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int         vm_free(task_t, void *);
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int         vm_attribute(task_t, void *, int);
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int         vm_map(task_t, void *, size_t, void **);
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vm_map_t vm_dup(vm_map_t);
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vm_map_t vm_create(void);
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int         vm_reference(vm_map_t);
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void         vm_terminate(vm_map_t);
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void         vm_switch(vm_map_t);
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int         vm_load(vm_map_t, struct module *, void **);
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paddr_t         vm_translate(vaddr_t, size_t);
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int         vm_info(struct vminfo *);
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void         vm_init(void);
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__END_DECLS
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#endif /* !_VM_H */