FreeBSD/Linux Kernel Cross Reference
sys/norma/ipc_wire.c

     /* 
      * Mach Operating System
      * Copyright (c) 1992 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.
     */
    /*
     * HISTORY
     * $Log:        ipc_wire.c,v $
     * Revision 2.2  92/03/10  16:28:41  jsb
     *      Merged in norma branch changes as of NORMA_MK7.
     *      [92/03/09  12:50:47  jsb]
     * 
     * Revision 2.1.2.1  92/01/21  21:53:23  jsb
     *      First checkin. Contents moved here from norma/ipc_output.c.
     *      [92/01/10  20:51:47  jsb]
     * 
     */
    /*
     *      File:   norma/ipc_wire.c
     *      Author: Joseph S. Barrera III
     *      Date:   1992
     *
     *      Functions to wire and unwire pages for norma ipc.
     */
    
    #include <mach/kern_return.h>
    #include <mach/port.h>
    #include <mach/vm_attributes.h>
    #include <mach/vm_param.h>
    #include <kern/assert.h>
    #include <kern/zalloc.h>
    #include <vm/vm_fault.h>
    #include <vm/vm_map.h>
    #include <vm/vm_object.h>
    #include <vm/vm_page.h>
    #include <ipc/ipc_port.h>
    
    /*
     * For now, we just steal pages.
     * In the future, we should remember enough information for
     * norma_ipc_thread_return to either pmap_protect appropriate pages
     * or block the thread until the pages are released.
     *
     * I think we don't need a norma_ipc_copyin_page_list_cont; we should be
     * able to use vm_map_copyin_page_list_cont.
     */
    kern_return_t
    norma_ipc_copyin_page_list(map, addr, len, src_destroy, copy_result, is_cont)
            vm_map_t        map;
            vm_offset_t     addr;
            vm_size_t       len;
            boolean_t       src_destroy;
            vm_map_copy_t   *copy_result;   /* OUT */
            boolean_t       is_cont;
    {
            return vm_map_copyin_page_list(map, addr, len, src_destroy, TRUE,
                                           copy_result, is_cont);
    }
    
    /*
     * Called when a thread wants to return to user space after possibly having
     * performed a norma_ipc_copyin_page_list.
     *
     * Hooks need to be added somewhere around thread_syscall_return and/or
     * returns from mach_msg_trap, etc.
     *
     * For now, this routine can do nothing (and not be called) because
     * norma_ipc_copyin_page_list simply steals pages.
     */
    norma_ipc_thread_return()
    {
    }

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