3cf7ecd1e4
and defines the macros needed by them.
* Renamed syscall sys_vm_map_file() to _kern_map_file() and changed the
path to an FD parameter. Changed vm_map_file() accordingly and
adjusted the kernel ELF loader and the runtime loader.
* Added syscall _kern_unmap_memory().
* Added bool unmapAddressRange parameter to vm_create_anonymous_area()
and map_backing_store(). If true and the address specification is
B_EXACT_ADDRESS, all areas in the specified address range will be
deleted (unless an area is covered only partially).
* Introduced B_SHARED_AREA flag, which is set on areas that have been
created by {vm,_user}_map_file() with REGION_NO_PRIVATE_MAP. When
fork()ing those areas won't be copied CoW, but rather be cloned. This
is needed for mmap() MAP_SHARED.
* {vm,_user}_map_file() also accept an FD argument < 0, in which case an
anonymous area is created.
* Implemented mmap() and munmap(). Currently there's the restriction
that we can't partially unmap areas. Otherwise the functions should be
rather compliant. We also support the non-POSIX extension
MAP_ANONYMOUS.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24964 a95241bf-73f2-0310-859d-f6bbb57e9c96
172 lines
6.4 KiB
C
172 lines
6.4 KiB
C
/*
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* Copyright 2002-2008, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
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* Distributed under the terms of the MIT License.
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*
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* Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
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* Distributed under the terms of the NewOS License.
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*/
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#ifndef _KERNEL_VM_H
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#define _KERNEL_VM_H
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#include <arch/vm.h>
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#include <OS.h>
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struct kernel_args;
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struct team;
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struct vm_page;
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struct vm_cache;
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struct vm_area;
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struct vm_address_space;
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struct vnode;
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// additional protection flags
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// Note: the VM probably won't support all combinations - it will try
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// its best, but create_area() will fail if it has to.
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// Of course, the exact behaviour will be documented somewhere...
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#define B_EXECUTE_AREA 0x04
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#define B_STACK_AREA 0x08
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// "stack" protection is not available on most platforms - it's used
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// to only commit memory as needed, and have guard pages at the
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// bottom of the stack.
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// "execute" protection is currently ignored, but nevertheless, you
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// should use it if you require to execute code in that area.
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#define B_KERNEL_EXECUTE_AREA 0x40
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#define B_KERNEL_STACK_AREA 0x80
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#define B_USER_PROTECTION \
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(B_READ_AREA | B_WRITE_AREA | B_EXECUTE_AREA | B_STACK_AREA)
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#define B_KERNEL_PROTECTION \
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(B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA | B_KERNEL_EXECUTE_AREA \
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| B_KERNEL_STACK_AREA)
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#define B_OVERCOMMITTING_AREA 0x1000
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#define B_SHARED_AREA 0x2000
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// TODO: These aren't really a protection flags, but since the "protection"
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// field is the only flag field, we currently use it for this.
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// A cleaner approach would be appreciated - maybe just an official generic
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// flags region in the protection field.
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#define B_USER_AREA_FLAGS (B_USER_PROTECTION)
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#define B_KERNEL_AREA_FLAGS \
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(B_KERNEL_PROTECTION | B_USER_CLONEABLE_AREA | B_OVERCOMMITTING_AREA \
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| B_SHARED_AREA)
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// flags for vm_get_physical_page()
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enum {
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PHYSICAL_PAGE_NO_WAIT = 0,
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PHYSICAL_PAGE_CAN_WAIT,
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};
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// mapping argument for several internal VM functions
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enum {
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REGION_NO_PRIVATE_MAP = 0,
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REGION_PRIVATE_MAP
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};
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enum {
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// ToDo: these are here only temporarily - it's a private
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// addition to the BeOS create_area() lock flags
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B_ALREADY_WIRED = 6,
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};
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#define MEMORY_TYPE_SHIFT 28
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#ifdef __cplusplus
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extern "C" {
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#endif
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// startup only
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status_t vm_init(struct kernel_args *args);
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status_t vm_init_post_sem(struct kernel_args *args);
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status_t vm_init_post_thread(struct kernel_args *args);
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status_t vm_init_post_modules(struct kernel_args *args);
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void vm_free_kernel_args(struct kernel_args *args);
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void vm_free_unused_boot_loader_range(addr_t start, addr_t end);
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addr_t vm_allocate_early(struct kernel_args *args, size_t virtualSize,
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size_t physicalSize, uint32 attributes);
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void slab_init(struct kernel_args *args, addr_t initialBase,
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size_t initialSize);
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void slab_init_post_sem();
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// to protect code regions with interrupts turned on
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void permit_page_faults(void);
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void forbid_page_faults(void);
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// private kernel only extension (should be moved somewhere else):
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area_id create_area_etc(struct team *team, const char *name, void **address,
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uint32 addressSpec, uint32 size, uint32 lock, uint32 protection);
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status_t delete_area_etc(struct team *team, area_id area);
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status_t vm_unreserve_address_range(team_id team, void *address, addr_t size);
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status_t vm_reserve_address_range(team_id team, void **_address,
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uint32 addressSpec, addr_t size, uint32 flags);
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area_id vm_create_anonymous_area(team_id team, const char *name, void **address,
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uint32 addressSpec, addr_t size, uint32 wiring, uint32 protection,
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bool unmapAddressRange);
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area_id vm_map_physical_memory(team_id team, const char *name, void **address,
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uint32 addressSpec, addr_t size, uint32 protection, addr_t phys_addr);
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area_id vm_map_file(team_id aid, const char *name, void **address,
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uint32 addressSpec, addr_t size, uint32 protection, uint32 mapping,
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int fd, off_t offset);
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struct vm_cache *vm_area_get_locked_cache(struct vm_area *area);
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void vm_area_put_locked_cache(struct vm_cache *cache);
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area_id vm_create_null_area(team_id team, const char *name, void **address,
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uint32 addressSpec, addr_t size);
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area_id vm_copy_area(team_id team, const char *name, void **_address,
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uint32 addressSpec, uint32 protection, area_id sourceID);
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area_id vm_clone_area(team_id team, const char *name, void **address,
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uint32 addressSpec, uint32 protection, uint32 mapping,
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area_id sourceArea);
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status_t vm_delete_area(team_id teamID, area_id areaID);
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status_t vm_create_vnode_cache(struct vnode *vnode, struct vm_cache **_cache);
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struct vm_area *vm_area_lookup(struct vm_address_space *addressSpace,
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addr_t address);
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status_t vm_set_area_memory_type(area_id id, addr_t physicalBase, uint32 type);
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status_t vm_get_page_mapping(team_id team, addr_t vaddr, addr_t *paddr);
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bool vm_test_map_modification(struct vm_page *page);
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int32 vm_test_map_activation(struct vm_page *page, bool *_modified);
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void vm_clear_map_flags(struct vm_page *page, uint32 flags);
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void vm_remove_all_page_mappings(struct vm_page *page, uint32 *_flags);
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status_t vm_unmap_pages(struct vm_area *area, addr_t base, size_t length,
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bool preserveModified);
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status_t vm_map_page(struct vm_area *area, struct vm_page *page, addr_t address,
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uint32 protection);
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status_t vm_get_physical_page(addr_t paddr, addr_t *vaddr, uint32 flags);
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status_t vm_put_physical_page(addr_t vaddr);
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off_t vm_available_memory(void);
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// user syscalls
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area_id _user_create_area(const char *name, void **address, uint32 addressSpec,
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size_t size, uint32 lock, uint32 protection);
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status_t _user_delete_area(area_id area);
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area_id _user_map_file(const char *uname, void **uaddress, int addressSpec,
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addr_t size, int protection, int mapping, int fd, off_t offset);
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status_t _user_unmap_memory(void *address, addr_t size);
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area_id _user_area_for(void *address);
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area_id _user_find_area(const char *name);
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status_t _user_get_area_info(area_id area, area_info *info);
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status_t _user_get_next_area_info(team_id team, int32 *cookie, area_info *info);
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status_t _user_resize_area(area_id area, size_t newSize);
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area_id _user_transfer_area(area_id area, void **_address, uint32 addressSpec,
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team_id target);
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status_t _user_set_area_protection(area_id area, uint32 newProtection);
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area_id _user_clone_area(const char *name, void **_address, uint32 addressSpec,
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uint32 protection, area_id sourceArea);
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status_t _user_reserve_heap_address_range(addr_t* userAddress, uint32 addressSpec,
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addr_t size);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _KERNEL_VM_H */
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