projects / apple / xnu.git / blame
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|---|---|---|
| 4452a7af A |
1 | /* |
| 2 | * Copyright (c) 2006 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 6 | * This file contains Original Code and/or Modifications of Original Code | |
| 7 | * as defined in and that are subject to the Apple Public Source License | |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 9 | * compliance with the License. The rights granted to you under the License | |
| 10 | * may not be used to create, or enable the creation or redistribution of, | |
| 11 | * unlawful or unlicensed copies of an Apple operating system, or to | |
| 12 | * circumvent, violate, or enable the circumvention or violation of, any | |
| 13 | * terms of an Apple operating system software license agreement. | |
| 14 | * | |
| 15 | * Please obtain a copy of the License at | |
| 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
| 17 | * | |
| 18 | * The Original Code and all software distributed under the License are | |
| 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 23 | * Please see the License for the specific language governing rights and | |
| 24 | * limitations under the License. | |
| 25 | * | |
| 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ | |
| 27 | */ | |
| 28 | // 45678901234567890123456789012345678901234567890123456789012345678901234567890 | |
| 29 | ||
| 30 | #include <libkern/OSAtomic.h> | |
| 31 | ||
| 32 | #include <IOKit/IOLocks.h> | |
| 33 | #include <IOKit/IOPlatformExpert.h> | |
| 34 | #include <IOKit/IODeviceTreeSupport.h> | |
| 35 | #include <IOKit/IOMapper.h> | |
| 36 | ||
| 37 | // General constants about all VART/DART style Address Re-Mapping Tables | |
| 38 | #define kMapperPage (4 * 1024) | |
| 39 | #define kTransPerPage (kMapperPage / sizeof(ppnum_t)) | |
| 40 | ||
| 41 | #define kMinZoneSize 4 // Minimum Zone size in pages | |
| 42 | #define kMaxNumZones (31 - 14) // 31 bit mapped in 16K super pages | |
| 43 | ||
| 44 | class IOCopyMapper : public IOMapper | |
| 45 | { | |
| 46 | OSDeclareDefaultStructors(IOCopyMapper); | |
| 47 | ||
| 48 | // alias the fTable variable into our mappings table | |
| 49 | #define fMappings ((ActiveDARTEntry *) super::fTable) | |
| 50 | ||
| 51 | private: | |
| 52 | ||
| 53 | UInt32 fFreeLists[kMaxNumZones]; | |
| 54 | ||
| 55 | IOLock *fTableLock; | |
| 56 | ||
| 57 | void *fDummyPage; | |
| 58 | ||
| 59 | UInt32 fNumZones; | |
| 60 | UInt32 fMapperRegionSize; | |
| 61 | UInt32 fMapperRegionUsed; | |
| 62 | UInt32 fMapperRegionMaxUsed; | |
| 63 | UInt32 fFreeSleepers; | |
| 64 | ppnum_t fDummyPageNumber; | |
| 65 | ppnum_t fBufferPage; | |
| 66 | ||
| 67 | // Internal functions | |
| 68 | ||
| 69 | void breakUp(unsigned start, unsigned end, unsigned freeInd); | |
| 70 | void invalidateDART(ppnum_t pnum, IOItemCount size); | |
| 71 | void tlbInvalidate(ppnum_t pnum, IOItemCount size); | |
| 72 | ||
| 73 | virtual void free(); | |
| 74 | ||
| 75 | virtual bool initHardware(IOService * provider); | |
| 76 | public: | |
| 77 | virtual ppnum_t iovmAlloc(IOItemCount pages); | |
| 78 | virtual void iovmFree(ppnum_t addr, IOItemCount pages); | |
| 79 | ||
| 80 | virtual void iovmInsert(ppnum_t addr, IOItemCount offset, ppnum_t page); | |
| 81 | virtual void iovmInsert(ppnum_t addr, IOItemCount offset, | |
| 82 | ppnum_t *pageList, IOItemCount pageCount); | |
| 83 | virtual void iovmInsert(ppnum_t addr, IOItemCount offset, | |
| 84 | upl_page_info_t *pageList, IOItemCount pageCount); | |
| 85 | ||
| 86 | virtual addr64_t mapAddr(IOPhysicalAddress addr); | |
| 87 | }; | |
| 88 | ||
| 89 | extern IOCopyMapper * gIOCopyMapper; |