scoutos / prex-0.9.0 / sys / include / vm.h @ 03e9c04a
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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 */ |