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 #include <IOKit/IODeviceMemory.h>
  27
  28 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  29
  30 IODeviceMemory * IODeviceMemory::withRange(
  31         IOPhysicalAddress       start,
  32         IOPhysicalLength        length )
  33 {
  34     return( (IODeviceMemory *) IOMemoryDescriptor::withPhysicalAddress(
  35                         start, length, kIODirectionNone ));
  36 }
  37
  38
  39 IODeviceMemory * IODeviceMemory::withSubRange(
  40         IODeviceMemory *        of,
  41         IOPhysicalAddress       offset,
  42         IOPhysicalLength        length )
  43 {
  44     return( (IODeviceMemory *) IOMemoryDescriptor::withSubRange(
  45                 of, offset, length, kIODirectionNone ));
  46 }
  47
  48
  49 OSArray * IODeviceMemory::arrayFromList(
  50         InitElement             list[],
  51         IOItemCount             count )
  52 {
  53     OSArray *           array;
  54     IODeviceMemory *    range;
  55     IOItemCount         i;
  56
  57     array = OSArray::withCapacity( count );
  58     if( 0 == array )
  59         return( 0);
  60
  61     for( i = 0; i < count; i++) {
  62         range = IODeviceMemory::withRange( list[i].start, list[i].length );
  63         if( range) {
  64             range->setTag( list[i].tag );
  65             array->setObject( range);
  66             range->release();
  67         } else {
  68             array->release();
  69             array = 0;
  70             break;
  71         }
  72     }
  73
  74     return( array );
  75 }
  76