diff options
Diffstat (limited to 'vm/vm_map.h')
| -rw-r--r-- | vm/vm_map.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/vm/vm_map.h b/vm/vm_map.h index 40c828a2..8961e1b9 100644 --- a/vm/vm_map.h +++ b/vm/vm_map.h @@ -466,6 +466,42 @@ extern kern_return_t vm_map_pageable_common(vm_map_t, vm_offset_t, extern vm_object_t vm_submap_object; /* + * vm_map_copyin_object: + * + * Create a copy object from an object. + * Our caller donates an object reference. + */ +extern kern_return_t vm_map_copyin_object( + vm_object_t object, + vm_offset_t offset, /* offset of region in object */ + vm_size_t size, /* size of region in object */ + vm_map_copy_t *copy_result); /* OUT */ + +/* + * vm_map_submap: [ kernel use only ] + * + * Mark the given range as handled by a subordinate map. + * + * This range must have been created with vm_map_find using + * the vm_submap_object, and no other operations may have been + * performed on this range prior to calling vm_map_submap. + * + * Only a limited number of operations can be performed + * within this rage after calling vm_map_submap: + * vm_fault + * [Don't try vm_map_copyin!] + * + * To remove a submapping, one must first remove the + * range from the superior map, and then destroy the + * submap (if desired). [Better yet, don't try it.] + */ +extern kern_return_t vm_map_submap( + vm_map_t map, + vm_offset_t start, + vm_offset_t end, + vm_map_t submap); + +/* * Wait and wakeup macros for in_transition map entries. */ #define vm_map_entry_wait(map, interruptible) \ @@ -477,4 +513,22 @@ extern vm_object_t vm_submap_object; #define vm_map_entry_wakeup(map) thread_wakeup((event_t)&(map)->hdr) +/* + * This routine is called only when it is known that + * the entry must be split. + */ +extern void _vm_map_clip_start( + struct vm_map_header *map_header, + vm_map_entry_t entry, + vm_offset_t start); + +/* + * vm_map_clip_end: [ internal use only ] + * + * Asserts that the given entry ends at or before + * the specified address; if necessary, + * it splits the entry into two. + */ +void _vm_map_clip_end(); + #endif /* _VM_VM_MAP_H_ */ |