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+++ xnu/xnu-344.21.73/iokit/Kernel/IOMapper.cpp
@@ -0,0 +1,389 @@
+/*
+ * Copyright (c) 1998-2003 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ *
+ * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+#include <IOKit/IOLib.h>
+#include <IOKit/IOMapper.h>
+#include <libkern/c++/OSData.h>
+
+#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)
+{
+ if (!super::start(provider))
+ return false;
+
+ if (!initHardware(provider))
+ return false;
+
+ if (fIsSystem) {
+ sMapperLock.lock();
+ IOMapper::gSystem = this;
+ sMapperLock.wakeup(&IOMapper::gSystem);
+ sMapperLock.unlock();
+ }
+
+ return true;
+}
+
+bool IOMapper::allocTable(IOByteCount size)
+{
+ assert(!fTable);
+
+ fTableSize = size;
+ fTableHandle = NewARTTable(size, &fTable, &fTablePhys);
+ return fTableHandle != 0;
+}
+
+void IOMapper::free()
+{
+ if (fTableHandle) {
+ FreeARTTable(fTableHandle, fTableSize);
+ fTableHandle = 0;
+ }
+
+ 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 ((vm_address_t) IOMapper::gSystem & kWaitMask)
+ sMapperLock.sleep(&IOMapper::gSystem);
+ sMapperLock.unlock();
+}
+
+void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset,
+ ppnum_t *pageList, IOItemCount pageCount)
+{
+ while (pageCount--)
+ iovmInsert(addr, offset++, *pageList++);
+}
+
+void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset,
+ upl_page_info_t *pageList, IOItemCount pageCount)
+{
+ for (IOItemCount i = 0; i < pageCount; i++)
+ iovmInsert(addr, offset + i, pageList[i].phys_addr);
+}
+
+struct ARTTableData {
+ void *v;
+ upl_t u[0];
+};
+#define getARTDataP(data) ((ARTTableData *) (data)->getBytesNoCopy())
+
+OSData *
+IOMapper::NewARTTable(IOByteCount size,
+ void ** virtAddrP, ppnum_t *physAddrP)
+{
+ OSData *ret;
+ kern_return_t kr;
+ vm_address_t startUpl;
+ ARTTableData *dataP;
+ unsigned int dataSize;
+ upl_page_info_t *pl = 0;
+
+ // Each UPL can deal with about one meg at the moment
+ size = round_page_32(size);
+ dataSize = sizeof(ARTTableData) + sizeof(upl_t) * size / (1024 * 1024);
+ ret = OSData::withCapacity(dataSize);
+ if (!ret)
+ return 0;
+
+ // Append 0's to the buffer, in-other-words reset to nulls.
+ ret->appendBytes(NULL, sizeof(ARTTableData));
+ dataP = getARTDataP(ret);
+
+ kr = kmem_alloc_contig(kernel_map, &startUpl, size, PAGE_MASK, 0);
+ if (kr)
+ return 0;
+
+ dataP->v = (void *) startUpl;
+
+ do {
+ upl_t iopl;
+ int upl_flags = UPL_SET_INTERNAL | UPL_SET_LITE
+ | UPL_SET_IO_WIRE | UPL_COPYOUT_FROM;
+ vm_size_t iopl_size = size;
+
+ kr = vm_map_get_upl(kernel_map,
+ startUpl,
+ &iopl_size,
+ &iopl,
+ 0,
+ 0,
+ &upl_flags,
+ 0);
+ if (kr) {
+ panic("IOMapper:vm_map_get_upl returned 0x%x\n");
+ goto bail;
+ }
+
+ if (!ret->appendBytes(&iopl, sizeof(upl_t)))
+ goto bail;
+
+ startUpl += iopl_size;
+ size -= iopl_size;
+ } while(size);
+
+ // Need to re-establish the dataP as the OSData may have grown.
+ dataP = getARTDataP(ret);
+
+ // Now grab the page entry of the first page and get its phys addr
+ pl = UPL_GET_INTERNAL_PAGE_LIST(dataP->u[0]);
+ *physAddrP = pl->phys_addr;
+ *virtAddrP = dataP->v;
+
+ return ret;
+
+bail:
+ FreeARTTable(ret, size);
+ return 0;
+}
+
+void IOMapper::FreeARTTable(OSData *artHandle, IOByteCount size)
+{
+ assert(artHandle);
+
+ ARTTableData *dataP = getARTDataP(artHandle);
+
+ int numupls = ((artHandle->getLength() - sizeof(*dataP)) / sizeof(upl_t));
+ for (int i = 0; i < numupls; i++)
+ kernel_upl_abort(dataP->u[i], 0);
+
+ if (dataP->v) {
+ size = round_page_32(size);
+ kmem_free(kernel_map, (vm_address_t) dataP->v, size);
+ }
+ artHandle->release();
+}
+
+__BEGIN_DECLS
+
+// These are C accessors to the system mapper for non-IOKit clients
+ppnum_t IOMapperIOVMAlloc(unsigned pages)
+{
+ IOMapper::checkForSystemMapper();
+
+ if (IOMapper::gSystem)
+ return IOMapper::gSystem->iovmAlloc((IOItemCount) pages);
+ else
+ return 0;
+}
+
+void IOMapperIOVMFree(ppnum_t addr, unsigned pages)
+{
+ if (IOMapper::gSystem)
+ IOMapper::gSystem->iovmFree(addr, (IOItemCount) pages);
+}
+
+ppnum_t IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page)
+{
+ if (IOMapper::gSystem) {
+ IOMapper::gSystem->iovmInsert(addr, (IOItemCount) offset, page);
+ return addr + offset;
+ }
+ else
+ return page;
+}
+
+void IOMapperInsertPPNPages(ppnum_t addr, unsigned offset,
+ ppnum_t *pageList, unsigned pageCount)
+{
+ if (!IOMapper::gSystem)
+ panic("IOMapperInsertPPNPages no system mapper");
+ else
+ assert(!((vm_address_t) IOMapper::gSystem & 3));
+
+ IOMapper::gSystem->
+ iovmInsert(addr, (IOItemCount) offset, pageList, pageCount);
+}
+
+void IOMapperInsertUPLPages(ppnum_t addr, unsigned offset,
+ upl_page_info_t *pageList, unsigned pageCount)
+{
+ if (!IOMapper::gSystem)
+ panic("IOMapperInsertUPLPages no system mapper");
+ else
+ assert(!((vm_address_t) IOMapper::gSystem & 3));
+
+ IOMapper::gSystem->iovmInsert(addr,
+ (IOItemCount) offset,
+ pageList,
+ (IOItemCount) pageCount);
+}
+
+/////////////////////////////////////////////////////////////////////////////
+//
+//
+// IOLib.h APIs
+//
+//
+/////////////////////////////////////////////////////////////////////////////
+
+#include <machine/machine_routines.h>
+
+UInt8 IOMappedRead8(IOPhysicalAddress address)
+{
+ IOMapper::checkForSystemMapper();
+
+ if (IOMapper::gSystem) {
+ addr64_t addr = IOMapper::gSystem->mapAddr(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->mapAddr(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->mapAddr(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->mapAddr(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->mapAddr(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->mapAddr(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->mapAddr(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->mapAddr(address);
+ ml_phys_write_double_64(addr, value);
+ }
+ else
+ ml_phys_write_double((vm_offset_t) address, value);
+}
+
+__END_DECLS