iokit/Kernel/IODeviceMemory.cpp

   1 /*
   2  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22
  23 #include <IOKit/IODeviceMemory.h>
  24
  25 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  26
  27 IODeviceMemory * IODeviceMemory::withRange(
  28         IOPhysicalAddress       start,
  29         IOPhysicalLength        length )
  30 {
  31     return( (IODeviceMemory *) IOMemoryDescriptor::withPhysicalAddress(
  32                         start, length, kIODirectionNone ));
  33 }
  34
  35
  36 IODeviceMemory * IODeviceMemory::withSubRange(
  37         IODeviceMemory *        of,
  38         IOPhysicalAddress       offset,
  39         IOPhysicalLength        length )
  40 {
  41     return( (IODeviceMemory *) IOMemoryDescriptor::withSubRange(
  42                 of, offset, length, kIODirectionNone ));
  43 }
  44
  45
  46 OSArray * IODeviceMemory::arrayFromList(
  47         InitElement             list[],
  48         IOItemCount             count )
  49 {
  50     OSArray *           array;
  51     IODeviceMemory *    range;
  52     IOItemCount         i;
  53
  54     array = OSArray::withCapacity( count );
  55     if( 0 == array )
  56         return( 0);
  57
  58     for( i = 0; i < count; i++) {
  59         range = IODeviceMemory::withRange( list[i].start, list[i].length );
  60         if( range) {
  61             range->setTag( list[i].tag );
  62             array->setObject( range);
  63             range->release();
  64         } else {
  65             array->release();
  66             array = 0;
  67             break;
  68         }
  69     }
  70
  71     return( array );
  72 }
  73