| 0,0 → 1,101 |
|---|
| /* |
| * 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 __AS_H__ |
| #define __AS_H__ |
| |
| #include <arch/mm/page.h> |
| #include <arch/mm/as.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) |
| |
| #define UTEXT_ADDRESS UTEXT_ADDRESS_ARCH |
| #define USTACK_ADDRESS USTACK_ADDRESS_ARCH |
| #define UDATA_ADDRESS UDATA_ADDRESS_ARCH |
| |
| enum as_area_type { |
| AS_AREA_TEXT = 1, AS_AREA_DATA, AS_AREA_STACK |
| }; |
| |
| /** Address space area structure. |
| * |
| * Each as_area_t structure describes one contiguous area of virtual memory. |
| * In the future, it should not be difficult to support shared areas. |
| */ |
| struct as_area { |
| SPINLOCK_DECLARE(lock); |
| link_t link; |
| as_area_type_t type; |
| size_t size; /**< Size of this area. */ |
| __address base; /**< Base address of this area. */ |
| index_t *mapping; /**< Map of physical frame numbers mapped to virtual page numbers in this area. */ |
| }; |
| |
| /** Address space structure. |
| * |
| * as_t contains the list of as_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 as { |
| SPINLOCK_DECLARE(lock); |
| link_t as_area_head; |
| pte_t *ptl0; |
| asid_t asid; /**< Address space identifier. */ |
| }; |
| |
| extern as_t * as_create(pte_t *ptl0); |
| extern as_area_t *as_area_create(as_t *as, as_area_type_t type, size_t size, __address base); |
| extern void as_area_load_mapping(as_area_t *a, index_t *pfn); |
| extern int as_page_fault(__address page); |
| extern void as_install(as_t *m); |
| |
| /* |
| * Each architecture should implement this function. |
| * Its main purpose is to do TLB purges according |
| * to architecture's requirements. Note that |
| * some architectures invalidate their TLB automatically |
| * on hardware address space switch (e.g. ia32 and |
| * amd64). |
| */ |
| #ifndef as_install_arch |
| extern void as_install_arch(as_t *as); |
| #endif /* !def as_install_arch */ |
| |
| #endif |