| 26,11 → 26,11 |
|---|
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef __VM_H__ |
| #define __VM_H__ |
| #ifndef __AS_H__ |
| #define __AS_H__ |
| |
| #include <arch/mm/page.h> |
| #include <arch/mm/vm.h> |
| #include <arch/mm/as.h> |
| #include <arch/mm/asid.h> |
| #include <arch/types.h> |
| #include <typedefs.h> |
| 48,46 → 48,54 |
|---|
| #define USTACK_ADDRESS USTACK_ADDRESS_ARCH |
| #define UDATA_ADDRESS UDATA_ADDRESS_ARCH |
| |
| enum vm_type { |
| VMA_TEXT = 1, VMA_DATA, VMA_STACK |
| enum as_area_type { |
| AS_AREA_TEXT = 1, AS_AREA_DATA, AS_AREA_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. |
| /** 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 vm_area { |
| struct as_area { |
| SPINLOCK_DECLARE(lock); |
| link_t link; |
| vm_type_t type; |
| int size; |
| __address address; |
| __address *mapping; |
| 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. */ |
| }; |
| |
| /* |
| * vm_t contains the list of vm_areas of userspace accessible |
| /** 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 vm { |
| struct as { |
| SPINLOCK_DECLARE(lock); |
| link_t vm_area_head; |
| link_t as_area_head; |
| pte_t *ptl0; |
| asid_t asid; |
| asid_t asid; /**< Address space identifier. */ |
| }; |
| |
| extern vm_t * vm_create(pte_t *ptl0); |
| extern void vm_destroy(vm_t *m); |
| 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); |
| |
| 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); |
| /* |
| * 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 */ |
| |
| extern void vm_area_map(vm_area_t *a, vm_t *m); |
| extern void vm_area_unmap(vm_area_t *a, vm_t *m); |
| |
| extern void vm_install(vm_t *m); |
| extern void vm_uninstall(vm_t *m); |
| |
| #endif |