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 |