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--- xnu/xnu-792.6.76/iokit/Kernel/IOBufferMemoryDescriptor.cpp
+++ xnu/xnu-517/iokit/Kernel/IOBufferMemoryDescriptor.cpp
@@ -3,19 +3,22 @@
*
* @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.
+ * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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. 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.
+ * 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_LICENSE_HEADER_END@
*/
@@ -24,8 +27,6 @@
#include <IOKit/IOLib.h>
#include <IOKit/IOBufferMemoryDescriptor.h>
-
-#include "IOKitKernelInternal.h"
__BEGIN_DECLS
void ipc_port_release_send(ipc_port_t port);
@@ -88,9 +89,8 @@
vm_offset_t alignment,
task_t inTask)
{
- kern_return_t kr;
- vm_map_t vmmap = 0;
- IOOptionBits iomdOptions = kIOMemoryAsReference | kIOMemoryTypeVirtual;
+ vm_map_t map = 0;
+ IOOptionBits iomdOptions = kIOMemoryAsReference | kIOMemoryTypeVirtual;
if (!capacity)
return false;
@@ -114,77 +114,34 @@
if (options & kIOMemoryPageable)
{
iomdOptions |= kIOMemoryBufferPageable;
-
- ipc_port_t sharedMem;
- vm_size_t size = round_page_32(capacity);
-
- // must create the entry before any pages are allocated
-
- // set flags for entry + object create
- vm_prot_t memEntryCacheMode = VM_PROT_READ | VM_PROT_WRITE
- | MAP_MEM_NAMED_CREATE;
-
- if (options & kIOMemoryPurgeable)
- memEntryCacheMode |= MAP_MEM_PURGABLE;
-
- // set memory entry cache mode
- switch (options & kIOMapCacheMask)
+ if (inTask == kernel_task)
{
- case kIOMapInhibitCache:
- SET_MAP_MEM(MAP_MEM_IO, memEntryCacheMode);
- break;
-
- case kIOMapWriteThruCache:
- SET_MAP_MEM(MAP_MEM_WTHRU, memEntryCacheMode);
- break;
-
- case kIOMapWriteCombineCache:
- SET_MAP_MEM(MAP_MEM_WCOMB, memEntryCacheMode);
- break;
-
- case kIOMapCopybackCache:
- SET_MAP_MEM(MAP_MEM_COPYBACK, memEntryCacheMode);
- break;
-
- case kIOMapDefaultCache:
- default:
- SET_MAP_MEM(MAP_MEM_NOOP, memEntryCacheMode);
- break;
- }
-
- kr = mach_make_memory_entry( vmmap,
- &size, 0,
- memEntryCacheMode, &sharedMem,
- NULL );
-
- if( (KERN_SUCCESS == kr) && (size != round_page_32(capacity))) {
- ipc_port_release_send( sharedMem );
- kr = kIOReturnVMError;
- }
- if( KERN_SUCCESS != kr)
- return( false );
-
- _memEntry = (void *) sharedMem;
-#if IOALLOCDEBUG
- debug_iomallocpageable_size += size;
-#endif
- if ((NULL == inTask) && (options & kIOMemoryPageable))
- inTask = kernel_task;
- else if (inTask == kernel_task)
- {
- vmmap = kernel_map;
+ /* Allocate some kernel address space. */
+ _buffer = IOMallocPageable(capacity, alignment);
+ if (_buffer)
+ map = IOPageableMapForAddress((vm_address_t) _buffer);
}
else
{
+ kern_return_t kr;
if( !reserved) {
reserved = IONew( ExpansionData, 1 );
if( !reserved)
return( false );
}
- vmmap = get_task_map(inTask);
- vm_map_reference(vmmap);
- reserved->map = vmmap;
+ map = get_task_map(inTask);
+ vm_map_reference(map);
+ reserved->map = map;
+ kr = vm_allocate( map, (vm_address_t *) &_buffer, round_page_32(capacity),
+ VM_FLAGS_ANYWHERE | VM_MAKE_TAG(VM_MEMORY_IOKIT) );
+ if( KERN_SUCCESS != kr)
+ return( false );
+
+ // we have to make sure that these pages don't get copied on fork.
+ kr = vm_inherit( map, (vm_address_t) _buffer, round_page_32(capacity), VM_INHERIT_NONE);
+ if( KERN_SUCCESS != kr)
+ return( false );
}
}
else
@@ -201,10 +158,10 @@
_buffer = IOMallocAligned(capacity, alignment);
else
_buffer = IOMalloc(capacity);
-
- if (!_buffer)
- return false;
- }
+ }
+
+ if (!_buffer)
+ return false;
_singleRange.v.address = (vm_address_t) _buffer;
_singleRange.v.length = capacity;
@@ -213,20 +170,53 @@
inTask, iomdOptions, /* System mapper */ 0))
return false;
- if (options & kIOMemoryPageable)
- {
+ if (options & kIOMemoryPageable) {
kern_return_t kr;
-
- if (vmmap)
- {
- kr = doMap(vmmap, (IOVirtualAddress *) &_buffer, kIOMapAnywhere, 0, round_page_32(capacity));
- if (KERN_SUCCESS != kr)
- {
- _buffer = 0;
- return( false );
- }
- _singleRange.v.address = (vm_address_t) _buffer;
- }
+ ipc_port_t sharedMem = (ipc_port_t) _memEntry;
+ vm_size_t size = round_page_32(_ranges.v[0].length);
+
+ // must create the entry before any pages are allocated
+ if( 0 == sharedMem) {
+
+ // set memory entry cache
+ vm_prot_t memEntryCacheMode = VM_PROT_READ | VM_PROT_WRITE;
+ switch (options & kIOMapCacheMask)
+ {
+ case kIOMapInhibitCache:
+ SET_MAP_MEM(MAP_MEM_IO, memEntryCacheMode);
+ break;
+
+ case kIOMapWriteThruCache:
+ SET_MAP_MEM(MAP_MEM_WTHRU, memEntryCacheMode);
+ break;
+
+ case kIOMapWriteCombineCache:
+ SET_MAP_MEM(MAP_MEM_WCOMB, memEntryCacheMode);
+ break;
+
+ case kIOMapCopybackCache:
+ SET_MAP_MEM(MAP_MEM_COPYBACK, memEntryCacheMode);
+ break;
+
+ case kIOMapDefaultCache:
+ default:
+ SET_MAP_MEM(MAP_MEM_NOOP, memEntryCacheMode);
+ break;
+ }
+
+ kr = mach_make_memory_entry( map,
+ &size, _ranges.v[0].address,
+ memEntryCacheMode, &sharedMem,
+ NULL );
+
+ if( (KERN_SUCCESS == kr) && (size != round_page_32(_ranges.v[0].length))) {
+ ipc_port_release_send( sharedMem );
+ kr = kIOReturnVMError;
+ }
+ if( KERN_SUCCESS != kr)
+ sharedMem = 0;
+ _memEntry = (void *) sharedMem;
+ }
}
setLength(capacity);
@@ -348,43 +338,39 @@
IOOptionBits options = _options;
vm_size_t size = _capacity;
void * buffer = _buffer;
- vm_map_t vmmap = 0;
+ vm_map_t map = 0;
vm_offset_t alignment = _alignment;
if (reserved)
{
- vmmap = reserved->map;
+ map = reserved->map;
IODelete( reserved, ExpansionData, 1 );
}
/* super::free may unwire - deallocate buffer afterwards */
super::free();
- if (options & kIOMemoryPageable)
+ if (buffer)
{
-#if IOALLOCDEBUG
- if (!buffer || vmmap)
- debug_iomallocpageable_size -= round_page_32(size);
-#endif
- if (buffer)
- {
- if (vmmap)
- vm_deallocate(vmmap, (vm_address_t) buffer, round_page_32(size));
+ if (options & kIOMemoryPageable)
+ {
+ if (map)
+ vm_deallocate(map, (vm_address_t) buffer, round_page_32(size));
+ else
+ IOFreePageable(buffer, size);
+ }
+ else
+ {
+ if (options & kIOMemoryPhysicallyContiguous)
+ IOFreeContiguous(buffer, size);
+ else if (alignment > 1)
+ IOFreeAligned(buffer, size);
else
- IOFreePageable(buffer, size);
+ IOFree(buffer, size);
}
}
- else if (buffer)
- {
- if (options & kIOMemoryPhysicallyContiguous)
- IOFreeContiguous(buffer, size);
- else if (alignment > 1)
- IOFreeAligned(buffer, size);
- else
- IOFree(buffer, size);
- }
- if (vmmap)
- vm_map_deallocate(vmmap);
+ if (map)
+ vm_map_deallocate(map);
}
/*