+++ /dev/null
-/*
- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
- *
- * @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.
- *
- * This 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.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-#ifndef _IOAPPLEPARTITIONSCHEME_H
-#define _IOAPPLEPARTITIONSCHEME_H
-
-#include <IOKit/IOTypes.h>
-
-/*
- * Apple Partition Map Definitions
- */
-
-#pragma pack(2) /* (enable 16-bit struct packing for dpme, DDMap, Block0) */
-
-/* Structure constants. */
-
-#define DPISTRLEN 32
-
-/* Partition map entry, as found in blocks 1 to dpme_map_entries of the disk. */
-
-typedef struct dpme
-{
- UInt16 dpme_signature; /* (unique value for partition entry, 'PM') */
- UInt16 dpme_reserved_1; /* (reserved for future use) */
- UInt32 dpme_map_entries; /* (number of partition entries) */
- UInt32 dpme_pblock_start; /* (physical block start of partition) */
- UInt32 dpme_pblocks; /* (physical block count of partition) */
- char dpme_name[DPISTRLEN]; /* (name of partition) */
- char dpme_type[DPISTRLEN]; /* (type of partition, eg. Apple_HFS) */
- UInt32 dpme_lblock_start; /* (logical block start of partition) */
- UInt32 dpme_lblocks; /* (logical block count of partition) */
- UInt32 dpme_flags; /* (partition flags, see defines below) */
- UInt32 dpme_boot_block; /* (logical block start of boot code) */
- UInt32 dpme_boot_bytes; /* (byte count of boot code) */
- UInt8 * dpme_load_addr; /* (load address in memory of boot code) */
- UInt8 * dpme_load_addr_2; /* (reserved for future use) */
- UInt8 * dpme_goto_addr; /* (jump address in memory of boot code) */
- UInt8 * dpme_goto_addr_2; /* (reserved for future use) */
- UInt32 dpme_checksum; /* (checksum of boot code) */
- UInt8 dpme_process_id[16]; /* (processor type) */
- UInt32 dpme_reserved_2[32]; /* (reserved for future use) */
- UInt32 dpme_reserved_3[62]; /* (reserved for future use) */
-} DPME;
-
-/* Driver descriptor map entry. */
-
-typedef struct DDMap
-{
- UInt32 ddBlock; /* (driver's block start, sbBlkSize-blocks) */
- UInt16 ddSize; /* (driver's block count, 512-blocks) */
- UInt16 ddType; /* (driver's system type) */
-} DDMap;
-
-/* Driver descriptor map, as found in block zero of the disk. */
-
-typedef struct Block0
-{
- UInt16 sbSig; /* (unique value for block zero, 'ER') */
- UInt16 sbBlkSize; /* (block size for this device) */
- UInt32 sbBlkCount; /* (block count for this device) */
- UInt16 sbDevType; /* (device type) */
- UInt16 sbDevId; /* (device id) */
- UInt32 sbDrvrData; /* (driver data) */
- UInt16 sbDrvrCount; /* (driver descriptor count) */
- DDMap sbDrvrMap[8]; /* (driver descriptor table) */
- UInt8 sbReserved[430]; /* (reserved for future use) */
-} Block0;
-
-/* Partition map signature (sbSig). */
-
-#define BLOCK0_SIGNATURE 0x4552
-
-/* Partition map entry signature (dpme_signature). */
-
-#define DPME_SIGNATURE 0x504D
-
-/* Partition map entry flags (dpme_flags). */
-
-#define DPME_FLAGS_VALID 0x00000001 /* (bit 0) */
-#define DPME_FLAGS_ALLOCATED 0x00000002 /* (bit 1) */
-#define DPME_FLAGS_IN_USE 0x00000004 /* (bit 2) */
-#define DPME_FLAGS_BOOTABLE 0x00000008 /* (bit 3) */
-#define DPME_FLAGS_READABLE 0x00000010 /* (bit 4) */
-#define DPME_FLAGS_WRITABLE 0x00000020 /* (bit 5) */
-#define DPME_FLAGS_OS_PIC_CODE 0x00000040 /* (bit 6) */
-#define DPME_FLAGS_OS_SPECIFIC_2 0x00000080 /* (bit 7) */
-#define DPME_FLAGS_OS_SPECIFIC_1 0x00000100 /* (bit 8) */
-#define DPME_FLAGS_RESERVED_2 0xFFFFFE00 /* (bit 9..31) */
-
-#pragma options align=reset /* (reset to default struct packing) */
-
-/*
- * Kernel
- */
-
-#if defined(KERNEL) && defined(__cplusplus)
-
-#include <IOKit/storage/IOPartitionScheme.h>
-
-/*
- * Class
- */
-
-class IOApplePartitionScheme : public IOPartitionScheme
-{
- OSDeclareDefaultStructors(IOApplePartitionScheme);
-
-protected:
-
- struct ExpansionData { /* */ };
- ExpansionData * _expansionData;
-
- OSSet * _partitions; /* (set of media objects representing partitions) */
-
- /*
- * Free all of this object's outstanding resources.
- */
-
- virtual void free(void);
-
- /*
- * Scan the provider media for an Apple partition map. Returns the set
- * of media objects representing each of the partitions (the retain for
- * the set is passed to the caller), or null should no partition map be
- * found. The default probe score can be adjusted up or down, based on
- * the confidence of the scan.
- */
-
- virtual OSSet * scan(SInt32 * score);
-
- /*
- * Ask whether the given partition appears to be corrupt. A partition that
- * is corrupt will cause the failure of the Apple partition map recognition
- * altogether.
- */
-
- virtual bool isPartitionCorrupt( dpme * partition,
- UInt32 partitionID,
- UInt32 partitionBlockSize );
-
- /*
- * Ask whether the given partition appears to be invalid. A partition that
- * is invalid will cause it to be skipped in the scan, but will not cause a
- * failure of the Apple partition map recognition.
- */
-
- virtual bool isPartitionInvalid( dpme * partition,
- UInt32 partitionID,
- UInt32 partitionBlockSize );
-
- /*
- * Instantiate a new media object to represent the given partition.
- */
-
- virtual IOMedia * instantiateMediaObject( dpme * partition,
- UInt32 partitionID,
- UInt32 partitionBlockSize );
-
- /*
- * Allocate a new media object (called from instantiateMediaObject).
- */
-
- virtual IOMedia * instantiateDesiredMediaObject(
- dpme * partition,
- UInt32 partitionID,
- UInt32 partitionBlockSize );
-
- /*
- * Attach the given media object to the device tree plane.
- */
-
- virtual bool attachMediaObjectToDeviceTree(IOMedia * media);
-
- /*
- * Detach the given media object from the device tree plane.
- */
-
- virtual void detachMediaObjectFromDeviceTree(IOMedia * media);
-
-public:
-
- /*
- * Initialize this object's minimal state.
- */
-
- virtual bool init(OSDictionary * properties = 0);
-
- /*
- * Determine whether the provider media contains an Apple partition map.
- */
-
- virtual IOService * probe(IOService * provider, SInt32 * score);
-
- /*
- * Publish the new media objects which represent our partitions.
- */
-
- virtual bool start(IOService * provider);
-
- /*
- * Clean up after the media objects we published before terminating.
- */
-
- virtual void stop(IOService * provider);
-
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 0);
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 1);
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 2);
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 3);
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 4);
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 5);
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 6);
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 7);
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 8);
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 9);
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 10);
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 11);
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 12);
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 13);
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 14);
- OSMetaClassDeclareReservedUnused(IOApplePartitionScheme, 15);
-};
-
-#endif /* defined(KERNEL) && defined(__cplusplus) */
-
-#endif /* !_IOAPPLEPARTITIONSCHEME_H */
projects / apple / xnu.git / blobdiff