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 #include <IOKit/IOSubMemoryDescriptor.h>
  31
  32 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  33
  34 IODeviceMemory *
  35 IODeviceMemory::withRange(
  36         IOPhysicalAddress       start,
  37         IOPhysicalLength        length )
  38 {
  39         return (IODeviceMemory *) IOMemoryDescriptor::withAddressRange(
  40                 start, length, kIODirectionNone | kIOMemoryMapperNone, NULL );
  41 }
  42
  43
  44 IODeviceMemory *
  45 IODeviceMemory::withSubRange(
  46         IODeviceMemory *        of,
  47         IOPhysicalAddress       offset,
  48         IOPhysicalLength        length )
  49 {
  50         return (IODeviceMemory *) IOSubMemoryDescriptor::withSubRange(
  51                 of, offset, length, kIODirectionNone );
  52 }
  53
  54
  55 OSArray *
  56 IODeviceMemory::arrayFromList(
  57         InitElement             list[],
  58         IOItemCount             count )
  59 {
  60         OSArray *           array;
  61         IODeviceMemory *    range;
  62         IOItemCount         i;
  63
  64         array = OSArray::withCapacity( count );
  65         if (0 == array) {
  66                 return 0;
  67         }
  68
  69         for (i = 0; i < count; i++) {
  70                 range = IODeviceMemory::withRange( list[i].start, list[i].length );
  71                 if (range) {
  72                         range->setTag( list[i].tag );
  73                         array->setObject( range);
  74                         range->release();
  75                 } else {
  76                         array->release();
  77                         array = 0;
  78                         break;
  79                 }
  80         }
  81
  82         return array;
  83 }