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[apple/xnu.git] / osfmk / mach / vm_map.defs

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/*
 * @OSF_FREE_COPYRIGHT@
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/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 * 
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 * 
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 */
/*
 *      File:   mach/vm_map.defs
 *
 *      Exported (native-sized) kernel VM calls.
 */

subsystem
#if     KERNEL_SERVER
          KernelServer
#endif  /* KERNEL_SERVER */
          vm_map 3800;

#include <mach/std_types.defs>
#include <mach/mach_types.defs>
#include <mach_debug/mach_debug_types.defs>

/*
 *      Returns information about the contents of the virtual
 *      address space of the target task at the specified
 *      address.  The returned protection, inheritance, sharing
 *      and memory object values apply to the entire range described
 *      by the address range returned; the memory object offset
 *      corresponds to the beginning of the address range.
 *      [If the specified address is not allocated, the next
 *      highest address range is described.  If no addresses beyond
 *      the one specified are allocated, the call returns KERN_NO_SPACE.]
 */
routine vm_region(
                target_task     : vm_map_t;
        inout   address         : vm_address_t;
        out     size            : vm_size_t;
                flavor          : vm_region_flavor_t;
        out     info            : vm_region_info_t, CountInOut;
        out     object_name     : memory_object_name_t =
                                        MACH_MSG_TYPE_MOVE_SEND
                                        ctype: mach_port_t);

/*
 *      Allocate zero-filled memory in the address space
 *      of the target task, either at the specified address,
 *      or wherever space can be found (if anywhere is TRUE),
 *      of the specified size.  The address at which the
 *      allocation actually took place is returned.
 */
routine vm_allocate(
                target_task     : vm_task_entry_t;
        inout   address         : vm_address_t;
                size            : vm_size_t;
                flags           : int);

/*
 *      Deallocate the specified range from the virtual
 *      address space of the target task.
 */
routine vm_deallocate(
                target_task     : vm_task_entry_t;
                address         : vm_address_t;
                size            : vm_size_t);

/*
 *      Set the current or maximum protection attribute
 *      for the specified range of the virtual address
 *      space of the target task.  The current protection
 *      limits the memory access rights of threads within
 *      the task; the maximum protection limits the accesses
 *      that may be given in the current protection.
 *      Protections are specified as a set of {read, write, execute}
 *      *permissions*.
 */
routine vm_protect(
                target_task     : vm_task_entry_t;
                address         : vm_address_t;
                size            : vm_size_t;
                set_maximum     : boolean_t;
                new_protection  : vm_prot_t);

/*
 *      Set the inheritance attribute for the specified range
 *      of the virtual address space of the target task.
 *      The inheritance value is one of {none, copy, share}, and
 *      specifies how the child address space should acquire
 *      this memory at the time of a task_create call.
 */
routine vm_inherit(
                target_task     : vm_task_entry_t;
                address         : vm_address_t;
                size            : vm_size_t;
                new_inheritance : vm_inherit_t);

/*
 *      Returns the contents of the specified range of the
 *      virtual address space of the target task.  [The
 *      range must be aligned on a virtual page boundary,
 *      and must be a multiple of pages in extent.  The
 *      protection on the specified range must permit reading.]
 */
routine vm_read(
                target_task     : vm_map_t;
                address         : vm_address_t;
                size            : vm_size_t;
        out     data            : pointer_t);

/* 
 * List corrollary to vm_read, returns mapped contents of specified
 * ranges within target address space.
 */
routine vm_read_list(
                target_task     : vm_map_t;
        inout   data_list       : vm_read_entry_t;
                count           : natural_t);

/*
 *      Writes the contents of the specified range of the
 *      virtual address space of the target task.  [The
 *      range must be aligned on a virtual page boundary,
 *      and must be a multiple of pages in extent.  The
 *      protection on the specified range must permit writing.]
 */
routine vm_write(
                target_task     : vm_map_t;
                address         : vm_address_t;
                data            : pointer_t);

/*
 *      Copy the contents of the source range of the virtual
 *      address space of the target task to the destination
 *      range in that same address space.  [Both of the
 *      ranges must be aligned on a virtual page boundary,
 *      and must be multiples of pages in extent.  The
 *      protection on the source range must permit reading,
 *      and the protection on the destination range must
 *      permit writing.]
 */
routine vm_copy(
                target_task     : vm_map_t;
                source_address  : vm_address_t;
                size            : vm_size_t;
                dest_address    : vm_address_t);

/*
 *      Returns the contents of the specified range of the
 *      virtual address space of the target task.  [There
 *      are no alignment restrictions, and the results will
 *      overwrite the area pointed to by data - which must
 *      already exist. The protection on the specified range
 *      must permit reading.]
 */
routine vm_read_overwrite(
                target_task     : vm_map_t;
                address         : vm_address_t;
                size            : vm_size_t;
                data            : vm_address_t;
        out     outsize         : vm_size_t);


routine vm_msync(
                target_task     : vm_map_t;
                address         : vm_address_t;
                size            : vm_size_t;
                sync_flags      : vm_sync_t );

/*
 *      Set the paging behavior attribute for the specified range
 *      of the virtual address space of the target task.
 *      The behavior value is one of {default, random, forward 
 *      sequential, reverse sequential} and indicates the expected
 *      page reference pattern for the specified range.
 */
routine vm_behavior_set(
                target_task     : vm_map_t;
                address         : vm_address_t;
                size            : vm_size_t;
                new_behavior    : vm_behavior_t);


/*
 *      Map a user-defined memory object into the virtual address
 *      space of the target task.  If desired (anywhere is TRUE),
 *      the kernel will find a suitable address range of the
 *      specified size; else, the specific address will be allocated.
 *
 *      The beginning address of the range will be aligned on a virtual
 *      page boundary, be at or beyond the address specified, and
 *      meet the mask requirements (bits turned on in the mask must not
 *      be turned on in the result); the size of the range, in bytes,
 *      will be rounded up to an integral number of virtual pages.
 *
 *      The memory in the resulting range will be associated with the
 *      specified memory object, with the beginning of the memory range
 *      referring to the specified offset into the memory object.
 *
 *      The mapping will take the current and maximum protections and
 *      the inheritance attributes specified; see the vm_protect and
 *      vm_inherit calls for a description of these attributes.
 *
 *      If desired (copy is TRUE), the memory range will be filled
 *      with a copy of the data from the memory object; this copy will
 *      be private to this mapping in this target task.  Otherwise,
 *      the memory in this mapping will be shared with other mappings
 *      of the same memory object at the same offset (in this task or
 *      in other tasks).  [The Mach kernel only enforces shared memory
 *      consistency among mappings on one host with similar page alignments.
 *      The user-defined memory manager for this object is responsible
 *      for further consistency.]
 */
routine vm_map(
                target_task     : vm_task_entry_t;
        inout   address         : vm_address_t;
                size            : vm_size_t;
                mask            : vm_address_t;
                flags           : int;
                object          : mem_entry_name_port_t;
                offset          : vm_offset_t;
                copy            : boolean_t;
                cur_protection  : vm_prot_t;
                max_protection  : vm_prot_t;
                inheritance     : vm_inherit_t);

/*
 *      Set/Get special properties of memory associated
 *      to some virtual address range, such as cachability, 
 *      migrability, replicability.  Machine-dependent.
 */
routine vm_machine_attribute(
                target_task     : vm_map_t;
                address         : vm_address_t;
                size            : vm_size_t;
                attribute       : vm_machine_attribute_t;
        inout   value           : vm_machine_attribute_val_t);

/*
 *      Map portion of a task's address space.
 */
routine vm_remap(
                target_task     : vm_map_t;
        inout   target_address  : vm_address_t;
                size            : vm_size_t;
                mask            : vm_address_t;
                anywhere        : boolean_t;
                src_task        : vm_map_t;
                src_address     : vm_address_t;
                copy            : boolean_t;
        out     cur_protection  : vm_prot_t;
        out     max_protection  : vm_prot_t;
                inheritance     : vm_inherit_t);

/*
 *      Require that all future virtual memory allocation
 *      allocates wired memory.  Setting must_wire to FALSE
 *      disables the wired future feature.
 */
routine task_wire(
                target_task     : vm_map_t;
                must_wire       : boolean_t);

        
/*
 *      Allow application level processes to create named entries which
 *      correspond to mapped portions of their address space.  These named
 *      entries can then be manipulated, shared with other processes in
 *      other address spaces and ultimately mapped in ohter address spaces
 */

routine mach_make_memory_entry(
                target_task     :vm_map_t;
        inout   size            :vm_size_t;
                offset          :vm_offset_t;
                permission      :vm_prot_t;
        out     object_handle   :mem_entry_name_port_move_send_t;
                parent_entry    :mem_entry_name_port_t);

/*
 *      Give the caller information on the given location in a virtual
 *      address space.  If a page is mapped return ref and dirty info.
 */
routine vm_map_page_query(
                target_map      :vm_map_t;
                offset          :vm_offset_t;
        out     disposition     :integer_t;
        out     ref_count       :integer_t);

/*
 *      Returns information about a region of memory.
 *      Includes info about the chain of objects rooted at that region.
 *      Only available in MACH_VM_DEBUG compiled kernels,
 *      otherwise returns KERN_FAILURE.
 */
routine mach_vm_region_info(
                task            : vm_map_t;
                address         : vm_address_t;
        out     region          : vm_info_region_t;
        out     objects         : vm_info_object_array_t);

routine vm_mapped_pages_info(
                task            : vm_map_t;
        out     pages           : page_address_array_t);

#if 0
/*
 *    Allow application level processes to create named entries which
 *    are backed by sub-maps which describe regions of address space.
 *    These regions of space can have objects mapped into them and
 *    in turn, can be mapped into target address spaces 
 */

routine vm_region_object_create(
                target_task     :vm_map_t;
        in      size            :vm_size_t;
        out     region_object   :mach_port_move_send_t);
#else
skip; /* was vm_region_object_create */
#endif

/*
 *      A recursive form of vm_region which probes submaps withint the
 *      address space.
 */
routine vm_region_recurse(
                target_task     : vm_map_t;
        inout   address         : vm_address_t;
        out     size            : vm_size_t;
        inout   nesting_depth   : natural_t;
        out     info            : vm_region_recurse_info_t,CountInOut);


/* 
 *      The routines below are temporary, meant for transitional use
 *      as their counterparts are moved from 32 to 64 bit data path
 */


routine vm_region_recurse_64(
                target_task     : vm_map_t;
        inout   address         : vm_address_t;
        out     size            : vm_size_t;
        inout   nesting_depth   : natural_t;
        out     info            : vm_region_recurse_info_t,CountInOut);

routine mach_vm_region_info_64(
                task            : vm_map_t;
                address         : vm_address_t;
        out     region          : vm_info_region_64_t;
        out     objects         : vm_info_object_array_t);

routine vm_region_64(
                target_task     : vm_map_t;
        inout   address         : vm_address_t;
        out     size            : vm_size_t;
                flavor          : vm_region_flavor_t;
        out     info            : vm_region_info_t, CountInOut;
        out     object_name     : memory_object_name_t =
                                        MACH_MSG_TYPE_MOVE_SEND
                                        ctype: mach_port_t);

routine mach_make_memory_entry_64(
                target_task     :vm_map_t;
        inout   size            :memory_object_size_t;
                offset          :memory_object_offset_t;
                permission      :vm_prot_t;
        out     object_handle   :mach_port_move_send_t;
                parent_entry    :mem_entry_name_port_t);



routine vm_map_64(
                target_task     : vm_task_entry_t;
        inout   address         : vm_address_t;
                size            : vm_size_t;
                mask            : vm_address_t;
                flags           : int;
                object          : mem_entry_name_port_t;
                offset          : memory_object_offset_t;
                copy            : boolean_t;
                cur_protection  : vm_prot_t;
                max_protection  : vm_prot_t;
                inheritance     : vm_inherit_t);

#if 0
/*
 * The UPL interfaces are not ready for user-level export.
 */
routine vm_map_get_upl(
                target_task     : vm_map_t;
                address         : vm_address_t;
        inout   size            : vm_size_t;
        out     upl             : upl_t;
        out     page_info       : upl_page_info_array_t, CountInOut;
        inout   flags           : integer_t;
                force_data_sync : integer_t);

routine vm_upl_map(
                target_task     : vm_map_t;
                upl             : upl_t;
        inout   address         : vm_address_t);

routine vm_upl_unmap(
                target_task     : vm_map_t;
                upl             : upl_t);
#else
skip; /* was vm_map_get_upl */
skip; /* was vm_upl_map */
skip; /* was vm_upl_unmap */
#endif          

/*
 *      Control behavior and investigate state of a "purgable" object in
 *      the virtual address space of the target task.  A purgable object is
 *      created via a call to vm_allocate() with VM_FLAGS_PURGABLE
 *      specified.  See the routine implementation for a complete
 *      definition of the routine.
 */
routine vm_purgable_control(
                target_task     : vm_map_t;
                address         : vm_address_t;
                control         : vm_purgable_t;
        inout   state           : int);