iokit/IOKit/IONVRAM.h

   1 /*
   2  * Copyright (c) 1998-2000 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,
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  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
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  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #ifndef _IOKIT_IONVRAM_H
  30 #define _IOKIT_IONVRAM_H
  31
  32 #include <IOKit/IOKitKeys.h>
  33 #include <IOKit/IOService.h>
  34 #include <IOKit/IODeviceTreeSupport.h>
  35 #include <IOKit/nvram/IONVRAMController.h>
  36
  37
  38 #define kIODTNVRAMOFPartitionName       "common"
  39 #define kIODTNVRAMXPRAMPartitionName    "APL,MacOS75"
  40 #define kIODTNVRAMPanicInfoPartitonName "APL,OSXPanic"
  41 #define kIODTNVRAMFreePartitionName     "wwwwwwwwwwww"
  42
  43 enum {
  44   kIODTNVRAMImageSize        = 0x2000,
  45   kIODTNVRAMXPRAMSize        = 0x0100,
  46   kIODTNVRAMNameRegistrySize = 0x0400
  47 };
  48
  49 enum {
  50   kOFVariableTypeBoolean = 1,
  51   kOFVariableTypeNumber,
  52   kOFVariableTypeString,
  53   kOFVariableTypeData
  54 };
  55
  56 enum {
  57   kOFVariablePermRootOnly = 0,
  58   kOFVariablePermUserRead,
  59   kOFVariablePermUserWrite,
  60   kOFVariablePermKernelOnly
  61 };
  62
  63 class IODTNVRAM : public IOService
  64 {
  65   OSDeclareDefaultStructors(IODTNVRAM);
  66
  67 private:
  68   IONVRAMController *_nvramController;
  69   const OSSymbol    *_registryPropertiesKey;
  70   UInt8             *_nvramImage;
  71   bool              _nvramImageDirty;
  72   UInt32            _ofPartitionOffset;
  73   UInt32            _ofPartitionSize;
  74   UInt8             *_ofImage;
  75   bool              _ofImageDirty;
  76   OSDictionary      *_ofDict;
  77   OSDictionary      *_nvramPartitionOffsets;
  78   OSDictionary      *_nvramPartitionLengths;
  79   UInt32            _xpramPartitionOffset;
  80   UInt32            _xpramPartitionSize;
  81   UInt8             *_xpramImage;
  82   UInt32            _nrPartitionOffset;
  83   UInt32            _nrPartitionSize;
  84   UInt8             *_nrImage;
  85   UInt32            _piPartitionOffset;
  86   UInt32            _piPartitionSize;
  87   UInt8             *_piImage;
  88   bool              _systemPaniced;
  89
  90   virtual UInt8 calculatePartitionChecksum(UInt8 *partitionHeader);
  91   virtual IOReturn initOFVariables(void);
  92 public:
  93   virtual IOReturn syncOFVariables(void);
  94 private:
  95   virtual UInt32 getOFVariableType(const OSSymbol *propSymbol) const;
  96   virtual UInt32 getOFVariablePerm(const OSSymbol *propSymbol) const;
  97   virtual bool getOWVariableInfo(UInt32 variableNumber, const OSSymbol **propSymbol,
  98                                  UInt32 *propType, UInt32 *propOffset);
  99   virtual bool convertPropToObject(UInt8 *propName, UInt32 propNameLength,
 100                                    UInt8 *propData, UInt32 propDataLength,
 101                                    const OSSymbol **propSymbol,
 102                                    OSObject **propObject);
 103   virtual bool convertObjectToProp(UInt8 *buffer, UInt32 *length,
 104                                    const OSSymbol *propSymbol, OSObject *propObject);
 105   virtual UInt16 generateOWChecksum(UInt8 *buffer);
 106   virtual bool validateOWChecksum(UInt8 *buffer);
 107   virtual void updateOWBootArgs(const OSSymbol *key, OSObject *value);
 108   virtual bool searchNVRAMProperty(struct IONVRAMDescriptor *hdr,
 109                                    UInt32 *where);
 110
 111   virtual IOReturn readNVRAMPropertyType0(IORegistryEntry *entry,
 112                                           const OSSymbol **name,
 113                                           OSData **value);
 114   virtual IOReturn writeNVRAMPropertyType0(IORegistryEntry *entry,
 115                                            const OSSymbol *name,
 116                                            OSData * value);
 117
 118   virtual OSData *unescapeBytesToData(const UInt8 *bytes, UInt32 length);
 119   virtual OSData *escapeDataToData(OSData * value);
 120
 121   virtual IOReturn readNVRAMPropertyType1(IORegistryEntry *entry,
 122                                           const OSSymbol **name,
 123                                           OSData **value);
 124   virtual IOReturn writeNVRAMPropertyType1(IORegistryEntry *entry,
 125                                            const OSSymbol *name,
 126                                            OSData *value);
 127
 128 public:
 129   virtual bool init(IORegistryEntry *old, const IORegistryPlane *plane);
 130
 131   virtual void registerNVRAMController(IONVRAMController *nvram);
 132
 133   virtual void sync(void);
 134
 135   virtual bool serializeProperties(OSSerialize *s) const;
 136   virtual OSObject *getProperty(const OSSymbol *aKey) const;
 137   virtual OSObject *getProperty(const char *aKey) const;
 138   virtual bool setProperty(const OSSymbol *aKey, OSObject *anObject);
 139   virtual void removeProperty(const OSSymbol *aKey);
 140   virtual IOReturn setProperties(OSObject *properties);
 141
 142   virtual IOReturn readXPRAM(IOByteCount offset, UInt8 *buffer,
 143                              IOByteCount length);
 144   virtual IOReturn writeXPRAM(IOByteCount offset, UInt8 *buffer,
 145                               IOByteCount length);
 146
 147   virtual IOReturn readNVRAMProperty(IORegistryEntry *entry,
 148                                      const OSSymbol **name,
 149                                      OSData **value);
 150   virtual IOReturn writeNVRAMProperty(IORegistryEntry *entry,
 151                                       const OSSymbol *name,
 152                                       OSData *value);
 153
 154   virtual OSDictionary *getNVRAMPartitions(void);
 155
 156   virtual IOReturn readNVRAMPartition(const OSSymbol *partitionID,
 157                                       IOByteCount offset, UInt8 *buffer,
 158                                       IOByteCount length);
 159
 160   virtual IOReturn writeNVRAMPartition(const OSSymbol *partitionID,
 161                                        IOByteCount offset, UInt8 *buffer,
 162                                        IOByteCount length);
 163
 164   virtual IOByteCount savePanicInfo(UInt8 *buffer, IOByteCount length);
 165 };
 166
 167 #endif /* !_IOKIT_IONVRAM_H */