vm_map_insert(9) [linux man page]

VM_MAP_INSERT(9)					   BSD Kernel Developer's Manual					  VM_MAP_INSERT(9)

NAME

     vm_map_insert -- insert an object into a map

SYNOPSIS

     #include <sys/param.h>
     #include <vm/vm.h>
     #include <vm/vm_map.h>

     int
     vm_map_insert(vm_map_t map, vm_object_t object, vm_ooffset_t offset, vm_offset_t start, vm_offset_t end, vm_prot_t prot, vm_prot_t max,
	 int cow);

DESCRIPTION

     The vm_map_insert() function inserts a mapping for the entire vm_object object into the target map map.

     The offset argument specifies the offset into the object at which to begin mapping.  The object's size should match that of the specified
     address range.

     The start and end arguments specify the bounds of the mapped object's window in the address space of map.

     The cow argument specifies the flags which should be propagated to the new entry, for example, to indicate that this is a copy-on-write map-
     ping.

IMPLEMENTATION NOTES

     This function implicitly creates a new vm_map_entry by calling the internal function vm_map_entry_create().  This function may use the Giant
     lock to ensure that only a single thread is present in the function.

RETURN VALUES

     The vm_map_insert() function returns KERN_SUCCESS if the mapping could be made successfully.

     Otherwise, KERN_INVALID_ADDRESS will be returned if the start of the range could not be found, or KERN_NO_SPACE if the range was found to be
     part of an existing entry or if it overlaps the end of the map.

SEE ALSO

     vm_map(9)

AUTHORS

     This manual page was written by Bruce M Simpson <bms@spc.org>.

BSD
								   July 19, 2003							       BSD

VM_MAP_FIND(9)						   BSD Kernel Developer's Manual					    VM_MAP_FIND(9)

NAME

     vm_map_find -- find a free region within a map, and optionally map a vm_object

SYNOPSIS

     #include <sys/param.h>
     #include <vm/vm.h>
     #include <vm/vm_map.h>

     int
     vm_map_find(vm_map_t map, vm_object_t object, vm_ooffset_t offset, vm_offset_t *addr, vm_size_t length, int find_space, vm_prot_t prot,
	 vm_prot_t max, int cow);

DESCRIPTION

     The vm_map_find() function attempts to find a free region in the target map, with the given length, and will also optionally create a mapping
     of object.

     The arguments offset, prot, max, and cow are passed unchanged to vm_map_insert(9) when creating the mapping, if and only if a free region is
     found.

     If object is non-NULL, the reference count on the object must be incremented by the caller before calling this function to account for the
     new entry.

     If find_space is either VMFS_ALIGNED_SPACE or VMFS_ANY_SPACE, the function will call vm_map_findspace(9) to discover a free region.  More-
     over, if find_space is VMFS_ALIGNED_SPACE, the address of the free region will be optimized for the use of superpages.  Otherwise, if
     find_space is VMFS_NO_SPACE, vm_map_insert(9) is called with the given address, addr.

IMPLEMENTATION NOTES

     This function acquires a lock on map by calling vm_map_lock(9), and holds it until the function returns.

     The search for a free region is defined to be first-fit, from the address addr onwards.

RETURN VALUES

     The vm_map_find() function returns KERN_SUCCESS if the mapping was successfully created.  If space could not be found or find_space was
     VMFS_NO_SPACE and the given address, addr, was already mapped, KERN_NO_SPACE will be returned.  If the discovered range turned out to be
     bogus, KERN_INVALID_ADDRESS will be returned.

SEE ALSO

     vm_map(9), vm_map_findspace(9), vm_map_insert(9), vm_map_lock(9)

AUTHORS

     This manual page was written by Bruce M Simpson <bms@spc.org>.

BSD
								   May 10, 2008 							       BSD