| 0,0 → 1,89 |
|---|
| /* |
| * 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/vm.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) |
| |
| #define UTEXT_ADDRESS UTEXT_ADDRESS_ARCH |
| #define USTACK_ADDRESS USTACK_ADDRESS_ARCH |
| #define UDATA_ADDRESS UDATA_ADDRESS_ARCH |
| |
| enum vm_type { |
| VMA_TEXT = 1, VMA_DATA, VMA_STACK |
| }; |
| |
| /* |
| * Each vm_area 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_mapping_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; |
| }; |
| |
| extern vm_t * vm_create(void); |
| extern void vm_destroy(vm_t *m); |
| |
| extern vm_area_t *vm_area_create(vm_t *m, vm_type_t type, int size, __address addr); |
| extern void vm_area_destroy(vm_area_t *a); |
| |
| extern void vm_area_map(vm_area_t *a); |
| extern void vm_area_unmap(vm_area_t *a); |
| |
| extern void vm_install(vm_t *m); |
| extern void vm_uninstall(vm_t *m); |
| |
| #endif |