iokit/Kernel/IODeviceMemory.cpp

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