io_map.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /* 
    2  * Mach Operating System
    3  * Copyright (c) 1991,1990 Carnegie Mellon University
    4  * All Rights Reserved.
    5  * 
    6  * Permission to use, copy, modify and distribute this software and its
    7  * documentation is hereby granted, provided that both the copyright
    8  * notice and this permission notice appear in all copies of the
    9  * software, derivative works or modified versions, and any portions
   10  * thereof, and that both notices appear in supporting documentation.
   11  * 
   12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   15  * 
   16  * Carnegie Mellon requests users of this software to return to
   17  * 
   18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   19  *  School of Computer Science
   20  *  Carnegie Mellon University
   21  *  Pittsburgh PA 15213-3890
   22  * 
   23  * any improvements or extensions that they make and grant Carnegie Mellon
   24  * the rights to redistribute these changes.
   25  */
   26 /*
   27  * HISTORY
   28  * $Log:        io_map.c,v $
   29  * Revision 2.5  91/05/14  16:09:37  mrt
   30  *      Correcting copyright
   31  * 
   32  * Revision 2.4  91/03/16  14:44:30  rpd
   33  *      Updated for new kmem_alloc interface.
   34  *      [91/03/03            rpd]
   35  * 
   36  * Revision 2.3  91/02/05  17:12:31  mrt
   37  *      Changed to new Mach copyright
   38  *      [91/02/01  17:35:11  mrt]
   39  * 
   40  * Revision 2.2  90/05/03  15:27:57  dbg
   41  *      Created.
   42  *      [90/02/21            dbg]
   43  * 
   44  */
   45 
   46 #include <mach/vm_param.h>
   47 #include <vm/vm_kern.h>
   48 #include <vm/vm_map.h>
   49 
   50 extern vm_offset_t      virtual_avail;
   51 
   52 /*
   53  * Allocate and map memory for devices that may need to be mapped before
   54  * Mach VM is running.
   55  */
   56 vm_offset_t
   57 io_map(phys_addr, size)
   58         vm_offset_t     phys_addr;
   59         vm_size_t       size;
   60 {
   61         vm_offset_t     start;
   62 
   63         if (kernel_map == VM_MAP_NULL) {
   64             /*
   65              * VM is not initialized.  Grab memory.
   66              */
   67             start = virtual_avail;
   68             virtual_avail += round_page(size);
   69         }
   70         else {
   71             (void) kmem_alloc_pageable(kernel_map, &start, round_page(size));
   72         }
   73         (void) pmap_map_bd(start, phys_addr, phys_addr + round_page(size),
   74                         VM_PROT_READ|VM_PROT_WRITE);
   75         return (start);
   76 }

Cache object: 02ad6799e2b0b4241c0f8fad6bf053d6

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/i386/io_map.c

FreeBSD/Linux Kernel Cross Reference
sys/i386/io_map.c