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--- xnu/xnu-3789.31.2/iokit/Kernel/IOMapper.cpp
+++ /dev/null
@@ -1,325 +0,0 @@
-/*
- * Copyright (c) 1998-2016 Apple 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
- * 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@
- */
-#include <IOKit/IOLib.h>
-#include <IOKit/IOMapper.h>
-#include <IOKit/IODMACommand.h>
-#include <libkern/c++/OSData.h>
-#include <libkern/OSDebug.h>
-#include "IOKitKernelInternal.h"
-
-__BEGIN_DECLS
-extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va);
-__END_DECLS
-
-#define super IOService
-OSDefineMetaClassAndAbstractStructors(IOMapper, IOService);
-
-OSMetaClassDefineReservedUnused(IOMapper, 0);
-OSMetaClassDefineReservedUnused(IOMapper, 1);
-OSMetaClassDefineReservedUnused(IOMapper, 2);
-OSMetaClassDefineReservedUnused(IOMapper, 3);
-OSMetaClassDefineReservedUnused(IOMapper, 4);
-OSMetaClassDefineReservedUnused(IOMapper, 5);
-OSMetaClassDefineReservedUnused(IOMapper, 6);
-OSMetaClassDefineReservedUnused(IOMapper, 7);
-OSMetaClassDefineReservedUnused(IOMapper, 8);
-OSMetaClassDefineReservedUnused(IOMapper, 9);
-OSMetaClassDefineReservedUnused(IOMapper, 10);
-OSMetaClassDefineReservedUnused(IOMapper, 11);
-OSMetaClassDefineReservedUnused(IOMapper, 12);
-OSMetaClassDefineReservedUnused(IOMapper, 13);
-OSMetaClassDefineReservedUnused(IOMapper, 14);
-OSMetaClassDefineReservedUnused(IOMapper, 15);
-
-IOMapper * IOMapper::gSystem = (IOMapper *) IOMapper::kUnknown;
-
-class IOMapperLock {
- IOLock *fWaitLock;
-public:
- IOMapperLock() { fWaitLock = IOLockAlloc(); }
- ~IOMapperLock() { IOLockFree(fWaitLock); }
-
- void lock() { IOLockLock(fWaitLock); }
- void unlock() { IOLockUnlock(fWaitLock); }
- void sleep(void *event) { IOLockSleep(fWaitLock, event, THREAD_UNINT); }
- void wakeup(void *event) { IOLockWakeup(fWaitLock, event, false); }
-};
-
-static IOMapperLock sMapperLock;
-
-bool IOMapper::start(IOService *provider)
-{
- OSObject * obj;
- if (!super::start(provider))
- return false;
-
- if (!initHardware(provider))
- return false;
-
- fPageSize = getPageSize();
-
- if (fIsSystem) {
- sMapperLock.lock();
- IOMapper::gSystem = this;
- sMapperLock.wakeup(&IOMapper::gSystem);
- sMapperLock.unlock();
- }
-
- if (provider)
- {
- obj = provider->getProperty("iommu-id");
- if (!obj)
- obj = provider->getProperty("AAPL,phandle");
- if (obj)
- setProperty(gIOMapperIDKey, obj);
- }
- return true;
-}
-
-void IOMapper::free()
-{
- super::free();
-}
-
-void IOMapper::setMapperRequired(bool hasMapper)
-{
- if (hasMapper)
- IOMapper::gSystem = (IOMapper *) kHasMapper;
- else {
- sMapperLock.lock();
- IOMapper::gSystem = (IOMapper *) kNoMapper;
- sMapperLock.unlock();
- sMapperLock.wakeup(&IOMapper::gSystem);
- }
-}
-
-void IOMapper::waitForSystemMapper()
-{
- sMapperLock.lock();
- while ((uintptr_t) IOMapper::gSystem & kWaitMask)
- {
- OSReportWithBacktrace("waitForSystemMapper");
- sMapperLock.sleep(&IOMapper::gSystem);
- }
- sMapperLock.unlock();
-}
-
-IOMapper * IOMapper::copyMapperForDevice(IOService * device)
-{
- return copyMapperForDeviceWithIndex(device, 0);
-}
-
-IOMapper * IOMapper::copyMapperForDeviceWithIndex(IOService * device, unsigned int index)
-{
- OSData *data;
- OSObject * obj;
- IOMapper * mapper = NULL;
- OSDictionary * matching;
-
- obj = device->copyProperty("iommu-parent");
- if (!obj)
- return (NULL);
-
- if ((mapper = OSDynamicCast(IOMapper, obj)))
- return (mapper);
-
- if ((data = OSDynamicCast(OSData, obj)))
- {
- if (index >= data->getLength() / sizeof(UInt32))
- goto done;
-
- data = OSData::withBytesNoCopy((UInt32 *)data->getBytesNoCopy() + index, sizeof(UInt32));
- if (!data)
- goto done;
-
- matching = IOService::propertyMatching(gIOMapperIDKey, data);
- data->release();
- }
- else
- matching = IOService::propertyMatching(gIOMapperIDKey, obj);
-
- if (matching)
- {
- mapper = OSDynamicCast(IOMapper, IOService::waitForMatchingService(matching));
- matching->release();
- }
-
-done:
- if (obj)
- obj->release();
- return (mapper);
-}
-
-__BEGIN_DECLS
-
-// These are C accessors to the system mapper for non-IOKit clients
-ppnum_t IOMapperIOVMAlloc(unsigned pages)
-{
- IOReturn ret;
- uint64_t dmaAddress, dmaLength;
-
- IOMapper::checkForSystemMapper();
-
- ret = kIOReturnUnsupported;
- if (IOMapper::gSystem)
- {
- ret = IOMapper::gSystem->iovmMapMemory(
- NULL, 0, ptoa_64(pages),
- (kIODMAMapReadAccess | kIODMAMapWriteAccess),
- NULL, NULL, NULL,
- &dmaAddress, &dmaLength);
- }
-
- if (kIOReturnSuccess == ret) return (atop_64(dmaAddress));
- return (0);
-}
-
-void IOMapperIOVMFree(ppnum_t addr, unsigned pages)
-{
- if (IOMapper::gSystem)
- {
- IOMapper::gSystem->iovmUnmapMemory(NULL, NULL, ptoa_64(addr), ptoa_64(pages));
- }
-}
-
-ppnum_t IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page)
-{
- if (!IOMapper::gSystem) return (page);
- if (!addr) panic("!addr");
- IOMapper::gSystem->iovmInsert((kIODMAMapReadAccess | kIODMAMapWriteAccess),
- ptoa_64(addr), ptoa_64(offset), ptoa_64(page), ptoa_64(1));
- return (addr + offset);
-}
-
-/////////////////////////////////////////////////////////////////////////////
-//
-//
-// IOLib.h APIs
-//
-//
-/////////////////////////////////////////////////////////////////////////////
-
-#include <machine/machine_routines.h>
-
-UInt8 IOMappedRead8(IOPhysicalAddress address)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- return (UInt8) ml_phys_read_byte_64(addr);
- }
- else
- return (UInt8) ml_phys_read_byte((vm_offset_t) address);
-}
-
-UInt16 IOMappedRead16(IOPhysicalAddress address)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- return (UInt16) ml_phys_read_half_64(addr);
- }
- else
- return (UInt16) ml_phys_read_half((vm_offset_t) address);
-}
-
-UInt32 IOMappedRead32(IOPhysicalAddress address)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- return (UInt32) ml_phys_read_word_64(addr);
- }
- else
- return (UInt32) ml_phys_read_word((vm_offset_t) address);
-}
-
-UInt64 IOMappedRead64(IOPhysicalAddress address)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- return (UInt64) ml_phys_read_double_64(addr);
- }
- else
- return (UInt64) ml_phys_read_double((vm_offset_t) address);
-}
-
-void IOMappedWrite8(IOPhysicalAddress address, UInt8 value)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- ml_phys_write_byte_64(addr, value);
- }
- else
- ml_phys_write_byte((vm_offset_t) address, value);
-}
-
-void IOMappedWrite16(IOPhysicalAddress address, UInt16 value)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- ml_phys_write_half_64(addr, value);
- }
- else
- ml_phys_write_half((vm_offset_t) address, value);
-}
-
-void IOMappedWrite32(IOPhysicalAddress address, UInt32 value)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- ml_phys_write_word_64(addr, value);
- }
- else
- ml_phys_write_word((vm_offset_t) address, value);
-}
-
-void IOMappedWrite64(IOPhysicalAddress address, UInt64 value)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- ml_phys_write_double_64(addr, value);
- }
- else
- ml_phys_write_double((vm_offset_t) address, value);
-}
-
-__END_DECLS