172 lines
6.4 KiB
C
172 lines
6.4 KiB
C
/*
|
|
* Copyright 2002-2008, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
|
|
* Distributed under the terms of the MIT License.
|
|
*
|
|
* Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
|
|
* Distributed under the terms of the NewOS License.
|
|
*/
|
|
#ifndef _KERNEL_VM_H
|
|
#define _KERNEL_VM_H
|
|
|
|
|
|
#include <arch/vm.h>
|
|
|
|
#include <OS.h>
|
|
|
|
|
|
struct kernel_args;
|
|
struct team;
|
|
struct vm_page;
|
|
struct vm_cache;
|
|
struct vm_area;
|
|
struct vm_address_space;
|
|
struct vnode;
|
|
|
|
|
|
// additional protection flags
|
|
// Note: the VM probably won't support all combinations - it will try
|
|
// its best, but create_area() will fail if it has to.
|
|
// Of course, the exact behaviour will be documented somewhere...
|
|
#define B_EXECUTE_AREA 0x04
|
|
#define B_STACK_AREA 0x08
|
|
// "stack" protection is not available on most platforms - it's used
|
|
// to only commit memory as needed, and have guard pages at the
|
|
// bottom of the stack.
|
|
// "execute" protection is currently ignored, but nevertheless, you
|
|
// should use it if you require to execute code in that area.
|
|
|
|
#define B_KERNEL_EXECUTE_AREA 0x40
|
|
#define B_KERNEL_STACK_AREA 0x80
|
|
|
|
#define B_USER_PROTECTION \
|
|
(B_READ_AREA | B_WRITE_AREA | B_EXECUTE_AREA | B_STACK_AREA)
|
|
#define B_KERNEL_PROTECTION \
|
|
(B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA | B_KERNEL_EXECUTE_AREA \
|
|
| B_KERNEL_STACK_AREA)
|
|
|
|
#define B_OVERCOMMITTING_AREA 0x1000
|
|
#define B_SHARED_AREA 0x2000
|
|
// TODO: These aren't really a protection flags, but since the "protection"
|
|
// field is the only flag field, we currently use it for this.
|
|
// A cleaner approach would be appreciated - maybe just an official generic
|
|
// flags region in the protection field.
|
|
|
|
|
|
#define B_USER_AREA_FLAGS (B_USER_PROTECTION)
|
|
#define B_KERNEL_AREA_FLAGS \
|
|
(B_KERNEL_PROTECTION | B_USER_CLONEABLE_AREA | B_OVERCOMMITTING_AREA \
|
|
| B_SHARED_AREA)
|
|
|
|
// flags for vm_get_physical_page()
|
|
enum {
|
|
PHYSICAL_PAGE_NO_WAIT = 0,
|
|
PHYSICAL_PAGE_CAN_WAIT,
|
|
};
|
|
|
|
// mapping argument for several internal VM functions
|
|
enum {
|
|
REGION_NO_PRIVATE_MAP = 0,
|
|
REGION_PRIVATE_MAP
|
|
};
|
|
|
|
enum {
|
|
// ToDo: these are here only temporarily - it's a private
|
|
// addition to the BeOS create_area() lock flags
|
|
B_ALREADY_WIRED = 6,
|
|
};
|
|
|
|
#define MEMORY_TYPE_SHIFT 28
|
|
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
// startup only
|
|
status_t vm_init(struct kernel_args *args);
|
|
status_t vm_init_post_sem(struct kernel_args *args);
|
|
status_t vm_init_post_thread(struct kernel_args *args);
|
|
status_t vm_init_post_modules(struct kernel_args *args);
|
|
void vm_free_kernel_args(struct kernel_args *args);
|
|
void vm_free_unused_boot_loader_range(addr_t start, addr_t end);
|
|
addr_t vm_allocate_early(struct kernel_args *args, size_t virtualSize,
|
|
size_t physicalSize, uint32 attributes);
|
|
|
|
void slab_init(struct kernel_args *args, addr_t initialBase,
|
|
size_t initialSize);
|
|
void slab_init_post_sem();
|
|
|
|
// to protect code regions with interrupts turned on
|
|
void permit_page_faults(void);
|
|
void forbid_page_faults(void);
|
|
|
|
// private kernel only extension (should be moved somewhere else):
|
|
area_id create_area_etc(struct team *team, const char *name, void **address,
|
|
uint32 addressSpec, uint32 size, uint32 lock, uint32 protection);
|
|
status_t delete_area_etc(struct team *team, area_id area);
|
|
|
|
status_t vm_unreserve_address_range(team_id team, void *address, addr_t size);
|
|
status_t vm_reserve_address_range(team_id team, void **_address,
|
|
uint32 addressSpec, addr_t size, uint32 flags);
|
|
area_id vm_create_anonymous_area(team_id team, const char *name, void **address,
|
|
uint32 addressSpec, addr_t size, uint32 wiring, uint32 protection,
|
|
bool unmapAddressRange);
|
|
area_id vm_map_physical_memory(team_id team, const char *name, void **address,
|
|
uint32 addressSpec, addr_t size, uint32 protection, addr_t phys_addr);
|
|
area_id vm_map_file(team_id aid, const char *name, void **address,
|
|
uint32 addressSpec, addr_t size, uint32 protection, uint32 mapping,
|
|
int fd, off_t offset);
|
|
struct vm_cache *vm_area_get_locked_cache(struct vm_area *area);
|
|
void vm_area_put_locked_cache(struct vm_cache *cache);
|
|
area_id vm_create_null_area(team_id team, const char *name, void **address,
|
|
uint32 addressSpec, addr_t size);
|
|
area_id vm_copy_area(team_id team, const char *name, void **_address,
|
|
uint32 addressSpec, uint32 protection, area_id sourceID);
|
|
area_id vm_clone_area(team_id team, const char *name, void **address,
|
|
uint32 addressSpec, uint32 protection, uint32 mapping,
|
|
area_id sourceArea);
|
|
status_t vm_delete_area(team_id teamID, area_id areaID);
|
|
status_t vm_create_vnode_cache(struct vnode *vnode, struct vm_cache **_cache);
|
|
struct vm_area *vm_area_lookup(struct vm_address_space *addressSpace,
|
|
addr_t address);
|
|
status_t vm_set_area_memory_type(area_id id, addr_t physicalBase, uint32 type);
|
|
status_t vm_get_page_mapping(team_id team, addr_t vaddr, addr_t *paddr);
|
|
bool vm_test_map_modification(struct vm_page *page);
|
|
int32 vm_test_map_activation(struct vm_page *page, bool *_modified);
|
|
void vm_clear_map_flags(struct vm_page *page, uint32 flags);
|
|
void vm_remove_all_page_mappings(struct vm_page *page, uint32 *_flags);
|
|
status_t vm_unmap_pages(struct vm_area *area, addr_t base, size_t length,
|
|
bool preserveModified);
|
|
status_t vm_map_page(struct vm_area *area, struct vm_page *page, addr_t address,
|
|
uint32 protection);
|
|
status_t vm_get_physical_page(addr_t paddr, addr_t *vaddr, uint32 flags);
|
|
status_t vm_put_physical_page(addr_t vaddr);
|
|
|
|
off_t vm_available_memory(void);
|
|
|
|
// user syscalls
|
|
area_id _user_create_area(const char *name, void **address, uint32 addressSpec,
|
|
size_t size, uint32 lock, uint32 protection);
|
|
status_t _user_delete_area(area_id area);
|
|
area_id _user_map_file(const char *uname, void **uaddress, int addressSpec,
|
|
addr_t size, int protection, int mapping, int fd, off_t offset);
|
|
status_t _user_unmap_memory(void *address, addr_t size);
|
|
area_id _user_area_for(void *address);
|
|
area_id _user_find_area(const char *name);
|
|
status_t _user_get_area_info(area_id area, area_info *info);
|
|
status_t _user_get_next_area_info(team_id team, int32 *cookie, area_info *info);
|
|
status_t _user_resize_area(area_id area, size_t newSize);
|
|
area_id _user_transfer_area(area_id area, void **_address, uint32 addressSpec,
|
|
team_id target);
|
|
status_t _user_set_area_protection(area_id area, uint32 newProtection);
|
|
area_id _user_clone_area(const char *name, void **_address, uint32 addressSpec,
|
|
uint32 protection, area_id sourceArea);
|
|
status_t _user_reserve_heap_address_range(addr_t* userAddress, uint32 addressSpec,
|
|
addr_t size);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _KERNEL_VM_H */
|