iokit/Kernel/IODeviceMemory.cpp

   1 /*
   2  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
  27  *
  28  * HISTORY
  29  * 23 Nov 98 sdouglas created.
  30  * 30 Sep 99 sdouglas, merged IODeviceMemory into IOMemoryDescriptor.
  31  */
  32
  33 #include <IOKit/IODeviceMemory.h>
  34
  35 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  36
  37 IODeviceMemory * IODeviceMemory::withRange(
  38         IOPhysicalAddress       start,
  39         IOPhysicalLength        length )
  40 {
  41     return( (IODeviceMemory *) IOMemoryDescriptor::withPhysicalAddress(
  42                         start, length, kIODirectionNone ));
  43 }
  44
  45
  46 IODeviceMemory * IODeviceMemory::withSubRange(
  47         IODeviceMemory *        of,
  48         IOPhysicalAddress       offset,
  49         IOPhysicalLength        length )
  50 {
  51     return( (IODeviceMemory *) IOMemoryDescriptor::withSubRange(
  52                 of, offset, length, kIODirectionNone ));
  53 }
  54
  55
  56 OSArray * IODeviceMemory::arrayFromList(
  57         InitElement             list[],
  58         IOItemCount             count )
  59 {
  60     OSArray *           array;
  61     IODeviceMemory *    range;
  62     IOItemCount         i;
  63
  64     array = OSArray::withCapacity( count );
  65     if( 0 == array )
  66         return( 0);
  67
  68     for( i = 0; i < count; i++) {
  69         range = IODeviceMemory::withRange( list[i].start, list[i].length );
  70         if( range) {
  71             range->setTag( list[i].tag );
  72             array->setObject( range);
  73             range->release();
  74         } else {
  75             array->release();
  76             array = 0;
  77             break;
  78         }
  79     }
  80
  81     return( array );
  82 }
  83