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  * Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
  24  *
  25  * HISTORY
  26  * 23 Nov 98 sdouglas created.
  27  * 30 Sep 99 sdouglas, merged IODeviceMemory into IOMemoryDescriptor.
  28  */
  29
  30 #include <IOKit/IODeviceMemory.h>
  31
  32 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  33
  34 IODeviceMemory * IODeviceMemory::withRange(
  35         IOPhysicalAddress       start,
  36         IOPhysicalLength        length )
  37 {
  38     return( (IODeviceMemory *) IOMemoryDescriptor::withPhysicalAddress(
  39                         start, length, kIODirectionNone ));
  40 }
  41
  42
  43 IODeviceMemory * IODeviceMemory::withSubRange(
  44         IODeviceMemory *        of,
  45         IOPhysicalAddress       offset,
  46         IOPhysicalLength        length )
  47 {
  48     return( (IODeviceMemory *) IOMemoryDescriptor::withSubRange(
  49                 of, offset, length, kIODirectionNone ));
  50 }
  51
  52
  53 OSArray * IODeviceMemory::arrayFromList(
  54         InitElement             list[],
  55         IOItemCount             count )
  56 {
  57     OSArray *           array;
  58     IODeviceMemory *    range;
  59     IOItemCount         i;
  60
  61     array = OSArray::withCapacity( count );
  62     if( 0 == array )
  63         return( 0);
  64
  65     for( i = 0; i < count; i++) {
  66         range = IODeviceMemory::withRange( list[i].start, list[i].length );
  67         if( range) {
  68             range->setTag( list[i].tag );
  69             array->setObject( range);
  70             range->release();
  71         } else {
  72             array->release();
  73             array = 0;
  74             break;
  75         }
  76     }
  77
  78     return( array );
  79 }
  80