| 34,6 → 34,7 |
|---|
| #define AS_AREA_WRITE 2 |
| #define AS_AREA_EXEC 4 |
| #define AS_AREA_DEVICE 8 |
| #define AS_AREA_ANON 16 |
| |
| #ifdef KERNEL |
| |
| 61,30 → 62,6 |
|---|
| |
| #define FLAG_AS_KERNEL (1 << 0) /**< Kernel address space. */ |
| |
| |
| /** Address space area attributes. */ |
| #define AS_AREA_ATTR_NONE 0 |
| #define AS_AREA_ATTR_PARTIAL 1 /* Not fully initialized area. */ |
| |
| #define AS_PF_FAULT 0 /**< The page fault was not resolved by as_page_fault(). */ |
| #define AS_PF_OK 1 /**< The page fault was resolved by as_page_fault(). */ |
| #define AS_PF_DEFER 2 /**< The page fault was caused by memcpy_from_uspace() |
| or memcpy_to_uspace(). */ |
| |
| /** 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 { |
| mutex_t lock; |
| int flags; /**< Flags related to the memory represented by the address space area. */ |
| int attributes; /**< Attributes related to the address space area itself. */ |
| count_t pages; /**< Size of this area in multiples of PAGE_SIZE. */ |
| __address base; /**< Base address of this area. */ |
| btree_t used_space; /**< Map of used space. */ |
| }; |
| |
| /** Address space structure. |
| * |
| * as_t contains the list of as_areas of userspace accessible |
| 118,6 → 95,42 |
|---|
| }; |
| typedef struct as_operations as_operations_t; |
| |
| /** Address space area attributes. */ |
| #define AS_AREA_ATTR_NONE 0 |
| #define AS_AREA_ATTR_PARTIAL 1 /**< Not fully initialized area. */ |
| |
| #define AS_PF_FAULT 0 /**< The page fault was not resolved by as_page_fault(). */ |
| #define AS_PF_OK 1 /**< The page fault was resolved by as_page_fault(). */ |
| #define AS_PF_DEFER 2 /**< The page fault was caused by memcpy_from_uspace() |
| or memcpy_to_uspace(). */ |
| |
| typedef struct share_info share_info_t; |
| typedef struct mem_backend mem_backend_t; |
| |
| /** 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 { |
| mutex_t lock; |
| int flags; /**< Flags related to the memory represented by the address space area. */ |
| int attributes; /**< Attributes related to the address space area itself. */ |
| count_t pages; /**< Size of this area in multiples of PAGE_SIZE. */ |
| __address base; /**< Base address of this area. */ |
| btree_t used_space; /**< Map of used space. */ |
| share_info_t *sh_info; /**< If the address space area has been shared, this pointer will |
| reference the share info structure. */ |
| mem_backend_t *backend; /**< Memory backend backing this address space area. */ |
| void *backend_data[2]; /**< Data to be used by the backend. */ |
| }; |
| |
| /** Address space area backend structure. */ |
| struct mem_backend { |
| int (* backend_page_fault)(as_area_t *area, __address addr); |
| void (* backend_frame_free)(as_area_t *area, __address page, __address frame); |
| }; |
| |
| extern as_t *AS_KERNEL; |
| extern as_operations_t *as_operations; |
| |
| 126,9 → 139,11 |
|---|
| |
| extern void as_init(void); |
| extern as_t *as_create(int flags); |
| extern as_area_t *as_area_create(as_t *as, int flags, size_t size, __address base, int attrs); |
| extern as_area_t *as_area_create(as_t *as, int flags, size_t size, __address base, int attrs, |
| mem_backend_t *backend, void **backend_data); |
| extern int as_area_resize(as_t *as, __address address, size_t size, int flags); |
| extern int as_area_destroy(as_t *as, __address address); |
| extern int as_area_get_flags(as_area_t *area); |
| extern void as_set_mapping(as_t *as, __address page, __address frame); |
| extern int as_page_fault(__address page, istate_t *istate); |
| extern void as_switch(as_t *old, as_t *new); |
| 135,6 → 150,8 |
|---|
| extern void as_free(as_t *as); |
| extern int as_area_steal(task_t *src_task, __address src_base, size_t acc_size, __address dst_base); |
| extern size_t as_get_size(__address base); |
| extern int used_space_insert(as_area_t *a, __address page, count_t count); |
| extern int used_space_remove(as_area_t *a, __address page, count_t count); |
| |
| /* Interface to be implemented by architectures. */ |
| #ifndef as_install_arch |
| 141,6 → 158,10 |
|---|
| extern void as_install_arch(as_t *as); |
| #endif /* !def as_install_arch */ |
| |
| /* Backend declarations. */ |
| extern mem_backend_t anon_backend; |
| extern mem_backend_t elf_backend; |
| |
| /* Address space area related syscalls. */ |
| extern __native sys_as_area_create(__address address, size_t size, int flags); |
| extern __native sys_as_area_resize(__address address, size_t size, int flags); |