Loading...
--- xnu/xnu-12377.121.6/iokit/Kernel/IOMemoryCursor.cpp
+++ xnu/xnu-344/iokit/Kernel/IOMemoryCursor.cpp
@@ -1,33 +1,25 @@
/*
* Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
*
- * @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
+ * @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
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * 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@
+ * 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@
*/
/* IOMemoryCursor.cpp created by wgulland on 1999-3-02 */
-
-#define IOKIT_ENABLE_SHARED_PTR
#include <IOKit/assert.h>
#include <IOKit/IOLib.h>
@@ -41,157 +33,97 @@
#define super OSObject
OSDefineMetaClassAndStructors(IOMemoryCursor, OSObject)
-OSSharedPtr<IOMemoryCursor>
+IOMemoryCursor *
IOMemoryCursor::withSpecification(SegmentFunction inSegFunc,
- IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
-{
- OSSharedPtr<IOMemoryCursor> me = OSMakeShared<IOMemoryCursor>();
-
- if (me && !me->initWithSpecification(inSegFunc,
- inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment)) {
- return nullptr;
- }
-
- return me;
+ IOPhysicalLength inMaxSegmentSize,
+ IOPhysicalLength inMaxTransferSize,
+ IOPhysicalLength inAlignment)
+{
+ IOMemoryCursor * me = new IOMemoryCursor;
+
+ if (me && !me->initWithSpecification(inSegFunc,
+ inMaxSegmentSize,
+ inMaxTransferSize,
+ inAlignment))
+ {
+ me->release();
+ return 0;
+ }
+
+ return me;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
bool
IOMemoryCursor::initWithSpecification(SegmentFunction inSegFunc,
- IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
-{
-// @@@ 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
+ 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;
+}
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+UInt32
IOMemoryCursor::genPhysicalSegments(IOMemoryDescriptor *inDescriptor,
- IOByteCount fromPosition,
- void * inSegments,
- UInt32 inMaxSegments,
- UInt32 inMaxTransferSize,
- IOByteCount *outTransferSize)
-{
- 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;
+ IOPhysicalLength 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;
}
/************************ class IONaturalMemoryCursor ************************/
@@ -200,39 +132,40 @@
#define super IOMemoryCursor
OSDefineMetaClassAndStructors(IONaturalMemoryCursor, IOMemoryCursor)
-void
-IONaturalMemoryCursor::outputSegment(PhysicalSegment segment,
- void * outSegments,
- UInt32 outSegmentIndex)
-{
- ((PhysicalSegment *) outSegments)[outSegmentIndex] = segment;
-}
-
-OSSharedPtr<IONaturalMemoryCursor>
+void IONaturalMemoryCursor::outputSegment(PhysicalSegment segment,
+ void * outSegments,
+ UInt32 outSegmentIndex)
+{
+ ((PhysicalSegment *) outSegments)[outSegmentIndex] = segment;
+}
+
+IONaturalMemoryCursor *
IONaturalMemoryCursor::withSpecification(IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
-{
- OSSharedPtr<IONaturalMemoryCursor> me = OSMakeShared<IONaturalMemoryCursor>();
-
- if (me && !me->initWithSpecification(inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment)) {
- return nullptr;
- }
-
- return me;
-}
-
-bool
+ IOPhysicalLength inMaxTransferSize,
+ IOPhysicalLength inAlignment)
+{
+ IONaturalMemoryCursor *me = new IONaturalMemoryCursor;
+
+ if (me && !me->initWithSpecification(inMaxSegmentSize,
+ inMaxTransferSize,
+ inAlignment))
+ {
+ me->release();
+ return 0;
+ }
+
+ return me;
+}
+
+bool
IONaturalMemoryCursor::initWithSpecification(IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
-{
- return super::initWithSpecification(&IONaturalMemoryCursor::outputSegment,
- inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment);
+ IOPhysicalLength inMaxTransferSize,
+ IOPhysicalLength inAlignment)
+{
+ return super::initWithSpecification(&IONaturalMemoryCursor::outputSegment,
+ inMaxSegmentSize,
+ inMaxTransferSize,
+ inAlignment);
}
/************************** class IOBigMemoryCursor **************************/
@@ -241,48 +174,45 @@
#define super IOMemoryCursor
OSDefineMetaClassAndStructors(IOBigMemoryCursor, IOMemoryCursor)
-void
+void
IOBigMemoryCursor::outputSegment(PhysicalSegment inSegment,
- void * inSegments,
- UInt32 inSegmentIndex)
-{
- 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
-}
-
-OSSharedPtr<IOBigMemoryCursor>
+ void * inSegments,
+ UInt32 inSegmentIndex)
+{
+ IOPhysicalAddress * segment;
+
+ segment = &((PhysicalSegment *) inSegments)[inSegmentIndex].location;
+ OSWriteBigInt(segment, 0, inSegment.location);
+ OSWriteBigInt(segment, sizeof(IOPhysicalAddress), inSegment.length);
+}
+
+IOBigMemoryCursor *
IOBigMemoryCursor::withSpecification(IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
-{
- OSSharedPtr<IOBigMemoryCursor> me = OSMakeShared<IOBigMemoryCursor>();
-
- if (me && !me->initWithSpecification(inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment)) {
- return nullptr;
- }
-
- return me;
-}
-
-bool
+ IOPhysicalLength inMaxTransferSize,
+ IOPhysicalLength inAlignment)
+{
+ IOBigMemoryCursor * me = new IOBigMemoryCursor;
+
+ if (me && !me->initWithSpecification(inMaxSegmentSize,
+ inMaxTransferSize,
+ inAlignment))
+ {
+ me->release();
+ return 0;
+ }
+
+ return me;
+}
+
+bool
IOBigMemoryCursor::initWithSpecification(IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
-{
- return super::initWithSpecification(&IOBigMemoryCursor::outputSegment,
- inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment);
+ IOPhysicalLength inMaxTransferSize,
+ IOPhysicalLength inAlignment)
+{
+ return super::initWithSpecification(&IOBigMemoryCursor::outputSegment,
+ inMaxSegmentSize,
+ inMaxTransferSize,
+ inAlignment);
}
/************************* class IOLittleMemoryCursor ************************/
@@ -291,48 +221,108 @@
#define super IOMemoryCursor
OSDefineMetaClassAndStructors(IOLittleMemoryCursor, IOMemoryCursor)
-void
+void
IOLittleMemoryCursor::outputSegment(PhysicalSegment inSegment,
- void * inSegments,
- UInt32 inSegmentIndex)
-{
- 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
-}
-
-OSSharedPtr<IOLittleMemoryCursor>
+ void * inSegments,
+ UInt32 inSegmentIndex)
+{
+ IOPhysicalAddress * segment;
+
+ segment = &((PhysicalSegment *) inSegments)[inSegmentIndex].location;
+ OSWriteLittleInt(segment, 0, inSegment.location);
+ OSWriteLittleInt(segment, sizeof(IOPhysicalAddress), inSegment.length);
+}
+
+IOLittleMemoryCursor *
IOLittleMemoryCursor::withSpecification(IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
-{
- OSSharedPtr<IOLittleMemoryCursor> me = OSMakeShared<IOLittleMemoryCursor>();
-
- if (me && !me->initWithSpecification(inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment)) {
- return nullptr;
- }
-
- return me;
+ IOPhysicalLength inMaxTransferSize,
+ IOPhysicalLength inAlignment)
+{
+ IOLittleMemoryCursor * me = new IOLittleMemoryCursor;
+
+ if (me && !me->initWithSpecification(inMaxSegmentSize,
+ inMaxTransferSize,
+ inAlignment))
+ {
+ me->release();
+ return 0;
+ }
+
+ 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;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
bool
-IOLittleMemoryCursor::initWithSpecification(IOPhysicalLength inMaxSegmentSize,
- IOPhysicalLength inMaxTransferSize,
- IOPhysicalLength inAlignment)
-{
- return super::initWithSpecification(&IOLittleMemoryCursor::outputSegment,
- inMaxSegmentSize,
- inMaxTransferSize,
- inAlignment);
-}
+IODBDMAMemoryCursor::initWithSpecification(IOPhysicalLength inMaxSegmentSize,
+ IOPhysicalLength inMaxTransferSize,
+ IOPhysicalLength inAlignment)
+{
+ return super::initWithSpecification(&IODBDMAMemoryCursor::outputSegment,
+ inMaxSegmentSize,
+ inMaxTransferSize,
+ inAlignment);
+}
+
+#endif /* defined(__ppc__) */
+