0,0 → 1,93 |
/* |
* Copyright (C) 2001-2004 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - 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. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. |
*/ |
|
#ifndef __VM_H__ |
#define __VM_H__ |
|
#include <arch/mm/page.h> |
#include <arch/mm/vm.h> |
#include <arch/mm/asid.h> |
#include <arch/types.h> |
#include <typedefs.h> |
#include <synch/spinlock.h> |
#include <list.h> |
|
#define KERNEL_ADDRESS_SPACE_START KERNEL_ADDRESS_SPACE_START_ARCH |
#define KERNEL_ADDRESS_SPACE_END KERNEL_ADDRESS_SPACE_END_ARCH |
#define USER_ADDRESS_SPACE_START USER_ADDRESS_SPACE_START_ARCH |
#define USER_ADDRESS_SPACE_END USER_ADDRESS_SPACE_END_ARCH |
|
#define IS_KA(addr) ((addr)>=KERNEL_ADDRESS_SPACE_START && (addr)<=KERNEL_ADDRESS_SPACE_END) |
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#define UTEXT_ADDRESS UTEXT_ADDRESS_ARCH |
#define USTACK_ADDRESS USTACK_ADDRESS_ARCH |
#define UDATA_ADDRESS UDATA_ADDRESS_ARCH |
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enum vm_type { |
VMA_TEXT = 1, VMA_DATA, VMA_STACK |
}; |
|
/* |
* Each vm_area_t structure describes one continuous area of virtual memory. |
* In the future, it should not be difficult to support shared areas of vm. |
*/ |
struct vm_area { |
spinlock_t lock; |
link_t link; |
vm_type_t type; |
int size; |
__address address; |
__address *mapping; |
}; |
|
/* |
* vm_t contains the list of vm_areas of userspace accessible |
* pages for one or more tasks. Ranges of kernel memory pages are not |
* supposed to figure in the list as they are shared by all tasks and |
* set up during system initialization. |
*/ |
struct vm { |
spinlock_t lock; |
link_t vm_area_head; |
pte_t *ptl0; |
asid_t asid; |
}; |
|
extern vm_t * vm_create(pte_t *ptl0); |
extern void vm_destroy(vm_t *m); |
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extern vm_area_t *vm_area_create(vm_t *m, vm_type_t type, size_t size, __address addr); |
extern void vm_area_destroy(vm_area_t *a); |
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extern void vm_area_map(vm_area_t *a, vm_t *m); |
extern void vm_area_unmap(vm_area_t *a, vm_t *m); |
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extern void vm_install(vm_t *m); |
extern void vm_uninstall(vm_t *m); |
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#endif |