iokit/Kernel/IODeviceMemory.cpp

   1 /*
   2  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #include <IOKit/IODeviceMemory.h>
  30
  31 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  32
  33 IODeviceMemory * IODeviceMemory::withRange(
  34         IOPhysicalAddress       start,
  35         IOPhysicalLength        length )
  36 {
  37     return( (IODeviceMemory *) IOMemoryDescriptor::withPhysicalAddress(
  38                         start, length, kIODirectionNone ));
  39 }
  40
  41
  42 IODeviceMemory * IODeviceMemory::withSubRange(
  43         IODeviceMemory *        of,
  44         IOPhysicalAddress       offset,
  45         IOPhysicalLength        length )
  46 {
  47     return( (IODeviceMemory *) IOMemoryDescriptor::withSubRange(
  48                 of, offset, length, kIODirectionNone ));
  49 }
  50
  51
  52 OSArray * IODeviceMemory::arrayFromList(
  53         InitElement             list[],
  54         IOItemCount             count )
  55 {
  56     OSArray *           array;
  57     IODeviceMemory *    range;
  58     IOItemCount         i;
  59
  60     array = OSArray::withCapacity( count );
  61     if( 0 == array )
  62         return( 0);
  63
  64     for( i = 0; i < count; i++) {
  65         range = IODeviceMemory::withRange( list[i].start, list[i].length );
  66         if( range) {
  67             range->setTag( list[i].tag );
  68             array->setObject( range);
  69             range->release();
  70         } else {
  71             array->release();
  72             array = 0;
  73             break;
  74         }
  75     }
  76
  77     return( array );
  78 }
  79