/*
* Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* IOMemoryCursor.cpp created by wgulland on 1999-3-02 */
+#define IOKIT_ENABLE_SHARED_PTR
+
#include <IOKit/assert.h>
#include <IOKit/IOLib.h>
#include <IOKit/IOMemoryCursor.h>
#define super OSObject
OSDefineMetaClassAndStructors(IOMemoryCursor, OSObject)
-IOMemoryCursor *
+OSSharedPtr<IOMemoryCursor>
IOMemoryCursor::withSpecification(SegmentFunction inSegFunc,
- IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
+ IOPhysicalLength inMaxSegmentSize,
+ IOPhysicalLength inMaxTransferSize,
+ IOPhysicalLength inAlignment)
{
- IOMemoryCursor * me = new IOMemoryCursor;
-
- if (me && !me->initWithSpecification(inSegFunc,
- inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment))
- {
- me->release();
- return 0;
- }
-
- return me;
+ OSSharedPtr<IOMemoryCursor> me = OSMakeShared<IOMemoryCursor>();
+
+ if (me && !me->initWithSpecification(inSegFunc,
+ inMaxSegmentSize,
+ inMaxTransferSize,
+ inAlignment)) {
+ return nullptr;
+ }
+
+ return me;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
bool
IOMemoryCursor::initWithSpecification(SegmentFunction inSegFunc,
- IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
+ IOPhysicalLength inMaxSegmentSize,
+ IOPhysicalLength inMaxTransferSize,
+ IOPhysicalLength inAlignment)
{
- if (!super::init())
- return false;
-
- if (!inSegFunc)
- return false;
-
- outSeg = inSegFunc;
- maxSegmentSize = inMaxSegmentSize;
- if (inMaxTransferSize)
- maxTransferSize = inMaxTransferSize;
- else
- maxTransferSize = (IOPhysicalLength) -1;
- alignMask = inAlignment - 1;
- assert(alignMask == 0); // No alignment code yet!
-
- return true;
+// @@@ gvdl: Remove me
+#if 1
+ static UInt sMaxDBDMASegment;
+ if (!sMaxDBDMASegment) {
+ sMaxDBDMASegment = (UInt) - 1;
+ if (PE_parse_boot_argn("mseg", &sMaxDBDMASegment, sizeof(sMaxDBDMASegment))) {
+ IOLog("Setting MaxDBDMASegment to %d\n", sMaxDBDMASegment);
+ }
+ }
+
+ if (inMaxSegmentSize > sMaxDBDMASegment) {
+ inMaxSegmentSize = sMaxDBDMASegment;
+ }
+#endif
+
+ if (!super::init()) {
+ return false;
+ }
+
+ if (!inSegFunc) {
+ return false;
+ }
+ if (inMaxTransferSize > UINT_MAX) {
+ return false;
+ }
+
+ outSeg = inSegFunc;
+ maxSegmentSize = inMaxSegmentSize;
+ if (inMaxTransferSize) {
+ maxTransferSize = inMaxTransferSize;
+ } else {
+ maxTransferSize = (IOPhysicalLength) - 1;
+ }
+ alignMask = inAlignment - 1;
+ assert(alignMask == 0); // No alignment code yet!
+
+ return true;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-UInt32
+UInt32
IOMemoryCursor::genPhysicalSegments(IOMemoryDescriptor *inDescriptor,
- IOPhysicalLength fromPosition,
- void * inSegments,
- UInt32 inMaxSegments,
- UInt32 inMaxTransferSize,
- IOByteCount *outTransferSize)
+ IOByteCount fromPosition,
+ void * inSegments,
+ UInt32 inMaxSegments,
+ UInt32 inMaxTransferSize,
+ IOByteCount *outTransferSize)
{
- if (!inDescriptor)
- return 0;
-
- if (!inMaxSegments)
- return 0;
-
- if (!inMaxTransferSize)
- inMaxTransferSize = maxTransferSize;
-
- /*
- * Iterate over the packet, translating segments where allowed
- *
- * If we finished cleanly return number of segments found
- * and update the position in the descriptor.
- */
- UInt curSegIndex = 0;
- UInt curTransferSize = 0;
- PhysicalSegment seg;
-
- while ((curSegIndex < inMaxSegments)
- && (curTransferSize < inMaxTransferSize)
- && (seg.location = inDescriptor->getPhysicalSegment(
- fromPosition + curTransferSize, &seg.length)))
- {
- assert(seg.length);
- seg.length = min(inMaxTransferSize-curTransferSize,
- (min(seg.length, maxSegmentSize)));
- (*outSeg)(seg, inSegments, curSegIndex++);
- curTransferSize += seg.length;
- }
-
- if (outTransferSize)
- *outTransferSize = curTransferSize;
-
- return curSegIndex;
+ if (!inDescriptor) {
+ return 0;
+ }
+
+ if (!inMaxSegments) {
+ return 0;
+ }
+
+ if (!inMaxTransferSize) {
+ inMaxTransferSize = (typeof(inMaxTransferSize))maxTransferSize;
+ }
+
+ /*
+ * Iterate over the packet, translating segments where allowed
+ *
+ * If we finished cleanly return number of segments found
+ * and update the position in the descriptor.
+ */
+ PhysicalSegment curSeg = { 0, 0 };
+ UInt curSegIndex = 0;
+ UInt curTransferSize = 0;
+ IOByteCount inDescriptorLength = inDescriptor->getLength();
+ PhysicalSegment seg = { 0, 0 };
+
+ while ((seg.location) || (fromPosition < inDescriptorLength)) {
+ if (!seg.location) {
+ seg.location = inDescriptor->getPhysicalSegment(
+ fromPosition, (IOByteCount*)&seg.length);
+ assert(seg.location);
+ assert(seg.length);
+ fromPosition += seg.length;
+ }
+
+ if (!curSeg.location) {
+ curTransferSize += seg.length;
+ curSeg = seg;
+ seg.location = 0;
+ } else if ((curSeg.location + curSeg.length == seg.location)) {
+ curTransferSize += seg.length;
+ curSeg.length += seg.length;
+ seg.location = 0;
+ }
+
+ if (!seg.location) {
+ if ((curSeg.length > maxSegmentSize)) {
+ seg.location = curSeg.location + maxSegmentSize;
+ seg.length = curSeg.length - maxSegmentSize;
+ curTransferSize -= seg.length;
+ curSeg.length -= seg.length;
+ }
+
+ if ((curTransferSize >= inMaxTransferSize)) {
+ curSeg.length -= curTransferSize - inMaxTransferSize;
+ curTransferSize = inMaxTransferSize;
+ break;
+ }
+ }
+
+ if (seg.location) {
+ if ((curSegIndex + 1 == inMaxSegments)) {
+ break;
+ }
+ (*outSeg)(curSeg, inSegments, curSegIndex++);
+ curSeg.location = 0;
+ }
+ }
+
+ if (curSeg.location) {
+ (*outSeg)(curSeg, inSegments, curSegIndex++);
+ }
+
+ if (outTransferSize) {
+ *outTransferSize = curTransferSize;
+ }
+
+ return curSegIndex;
}
/************************ class IONaturalMemoryCursor ************************/
#define super IOMemoryCursor
OSDefineMetaClassAndStructors(IONaturalMemoryCursor, IOMemoryCursor)
-void IONaturalMemoryCursor::outputSegment(PhysicalSegment segment,
- void * outSegments,
- UInt32 outSegmentIndex)
+void
+IONaturalMemoryCursor::outputSegment(PhysicalSegment segment,
+ void * outSegments,
+ UInt32 outSegmentIndex)
{
- ((PhysicalSegment *) outSegments)[outSegmentIndex] = segment;
+ ((PhysicalSegment *) outSegments)[outSegmentIndex] = segment;
}
-IONaturalMemoryCursor *
+OSSharedPtr<IONaturalMemoryCursor>
IONaturalMemoryCursor::withSpecification(IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
+ IOPhysicalLength inMaxTransferSize,
+ IOPhysicalLength inAlignment)
{
- IONaturalMemoryCursor *me = new IONaturalMemoryCursor;
+ OSSharedPtr<IONaturalMemoryCursor> me = OSMakeShared<IONaturalMemoryCursor>();
- if (me && !me->initWithSpecification(inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment))
- {
- me->release();
- return 0;
- }
+ if (me && !me->initWithSpecification(inMaxSegmentSize,
+ inMaxTransferSize,
+ inAlignment)) {
+ return nullptr;
+ }
- return me;
+ return me;
}
-bool
+bool
IONaturalMemoryCursor::initWithSpecification(IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
+ IOPhysicalLength inMaxTransferSize,
+ IOPhysicalLength inAlignment)
{
- return super::initWithSpecification(&IONaturalMemoryCursor::outputSegment,
- inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment);
+ return super::initWithSpecification(&IONaturalMemoryCursor::outputSegment,
+ inMaxSegmentSize,
+ inMaxTransferSize,
+ inAlignment);
}
/************************** class IOBigMemoryCursor **************************/
#define super IOMemoryCursor
OSDefineMetaClassAndStructors(IOBigMemoryCursor, IOMemoryCursor)
-void
+void
IOBigMemoryCursor::outputSegment(PhysicalSegment inSegment,
- void * inSegments,
- UInt32 inSegmentIndex)
+ void * inSegments,
+ UInt32 inSegmentIndex)
{
- IOPhysicalAddress * segment;
-
- segment = &((PhysicalSegment *) inSegments)[inSegmentIndex].location;
- OSWriteBigInt(segment, 0, inSegment.location);
- OSWriteBigInt(segment, sizeof(IOPhysicalAddress), inSegment.length);
+ IOPhysicalAddress * segment;
+
+ segment = &((PhysicalSegment *) inSegments)[inSegmentIndex].location;
+#if IOPhysSize == 64
+ OSWriteBigInt64(segment, 0, inSegment.location);
+ OSWriteBigInt64(segment, sizeof(IOPhysicalAddress), inSegment.length);
+#else
+ OSWriteBigInt(segment, 0, inSegment.location);
+ OSWriteBigInt(segment, sizeof(IOPhysicalAddress), inSegment.length);
+#endif
}
-IOBigMemoryCursor *
+OSSharedPtr<IOBigMemoryCursor>
IOBigMemoryCursor::withSpecification(IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
+ IOPhysicalLength inMaxTransferSize,
+ IOPhysicalLength inAlignment)
{
- IOBigMemoryCursor * me = new IOBigMemoryCursor;
+ OSSharedPtr<IOBigMemoryCursor> me = OSMakeShared<IOBigMemoryCursor>();
- if (me && !me->initWithSpecification(inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment))
- {
- me->release();
- return 0;
- }
+ if (me && !me->initWithSpecification(inMaxSegmentSize,
+ inMaxTransferSize,
+ inAlignment)) {
+ return nullptr;
+ }
- return me;
+ return me;
}
-bool
+bool
IOBigMemoryCursor::initWithSpecification(IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
+ IOPhysicalLength inMaxTransferSize,
+ IOPhysicalLength inAlignment)
{
- return super::initWithSpecification(&IOBigMemoryCursor::outputSegment,
- inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment);
+ return super::initWithSpecification(&IOBigMemoryCursor::outputSegment,
+ inMaxSegmentSize,
+ inMaxTransferSize,
+ inAlignment);
}
/************************* class IOLittleMemoryCursor ************************/
#define super IOMemoryCursor
OSDefineMetaClassAndStructors(IOLittleMemoryCursor, IOMemoryCursor)
-void
+void
IOLittleMemoryCursor::outputSegment(PhysicalSegment inSegment,
- void * inSegments,
- UInt32 inSegmentIndex)
+ void * inSegments,
+ UInt32 inSegmentIndex)
{
- IOPhysicalAddress * segment;
-
- segment = &((PhysicalSegment *) inSegments)[inSegmentIndex].location;
- OSWriteLittleInt(segment, 0, inSegment.location);
- OSWriteLittleInt(segment, sizeof(IOPhysicalAddress), inSegment.length);
+ IOPhysicalAddress * segment;
+
+ segment = &((PhysicalSegment *) inSegments)[inSegmentIndex].location;
+#if IOPhysSize == 64
+ OSWriteLittleInt64(segment, 0, inSegment.location);
+ OSWriteLittleInt64(segment, sizeof(IOPhysicalAddress), inSegment.length);
+#else
+ OSWriteLittleInt(segment, 0, inSegment.location);
+ OSWriteLittleInt(segment, sizeof(IOPhysicalAddress), inSegment.length);
+#endif
}
-IOLittleMemoryCursor *
+OSSharedPtr<IOLittleMemoryCursor>
IOLittleMemoryCursor::withSpecification(IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
+ IOPhysicalLength inMaxTransferSize,
+ IOPhysicalLength inAlignment)
{
- IOLittleMemoryCursor * me = new IOLittleMemoryCursor;
+ OSSharedPtr<IOLittleMemoryCursor> me = OSMakeShared<IOLittleMemoryCursor>();
- if (me && !me->initWithSpecification(inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment))
- {
- me->release();
- return 0;
- }
+ if (me && !me->initWithSpecification(inMaxSegmentSize,
+ inMaxTransferSize,
+ inAlignment)) {
+ return nullptr;
+ }
- return me;
-}
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-bool
-IOLittleMemoryCursor::initWithSpecification(IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
-{
- return super::initWithSpecification(&IOLittleMemoryCursor::outputSegment,
- inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment);
-}
-
-/************************* class IODBDMAMemoryCursor *************************/
-
-#if defined(__ppc__)
-
-#include <IOKit/ppc/IODBDMA.h>
-
-#undef super
-#define super IOMemoryCursor
-OSDefineMetaClassAndStructors(IODBDMAMemoryCursor, IOMemoryCursor)
-
-void
-IODBDMAMemoryCursor::outputSegment(PhysicalSegment inSegment,
- void * inSegments,
- UInt32 inSegmentIndex)
-{
- IODBDMADescriptor *segment;
-
- segment = &((IODBDMADescriptor *) inSegments)[inSegmentIndex];
-
- // Write location into address field
- OSWriteSwapInt32((UInt32 *) segment, 4, inSegment.location);
-
- // Write count into 1st two bytes of operation field.
- // DO NOT touch rest of operation field as it should contain a STOP command.
- OSWriteSwapInt16((UInt16 *) segment, 0, inSegment.length);
-}
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-IODBDMAMemoryCursor *
-IODBDMAMemoryCursor::withSpecification(IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
-{
- IODBDMAMemoryCursor *me = new IODBDMAMemoryCursor;
-
- if (me && !me->initWithSpecification(inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment))
- {
- me->release();
- return 0;
- }
-
- return me;
+ return me;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
bool
-IODBDMAMemoryCursor::initWithSpecification(IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
+IOLittleMemoryCursor::initWithSpecification(IOPhysicalLength inMaxSegmentSize,
+ IOPhysicalLength inMaxTransferSize,
+ IOPhysicalLength inAlignment)
{
- return super::initWithSpecification(&IODBDMAMemoryCursor::outputSegment,
- inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment);
+ return super::initWithSpecification(&IOLittleMemoryCursor::outputSegment,
+ inMaxSegmentSize,
+ inMaxTransferSize,
+ inAlignment);
}
-
-#endif /* defined(__ppc__) */
-
projects / apple / xnu.git / blobdiff