/* ----------------------------------------------------------------------- * * * Copyright 2009 Pierre-Alexandre Meyer * * Some parts borrowed from chain.c32: * * Copyright 2003-2009 H. Peter Anvin - All Rights Reserved * Copyright 2009 Intel Corporation; author: H. Peter Anvin * * Some parts borrowed from Linux: * * Copyright (C) 2002, 2003, 2004 Dell Inc. * by Matt Domsch * * This file is part of Syslinux, and is made available under * the terms of the GNU General Public License version 2. * * ----------------------------------------------------------------------- */ #ifndef _GEOM_H_ #define _GEOM_H_ #include /** * INT 13 Extensions * * Note: if the size is less than 30 on call, the final DWORD will not be * returned by a v2.x implementation; similarly for the Device Path info **/ struct edd_device_parameters { uint16_t len; /* size of returned data */ /** * Bitfields for IBM/MS INT 13 Extensions information flags: * Bit(s) Description (Table 00274) * 0 DMA boundary errors handled transparently * 1 cylinder/head/sectors-per-track information is valid * 2 removable drive * 3 write with verify supported * 4 drive has change-line support (required if drive >= 80h is removable) * 5 drive can be locked (required if drive >= 80h is removable) * 6 CHS information set to maximum supported values, not current media * 15-7 reserved (0) **/ uint16_t info; /* information flags */ uint32_t cylinders; /* number of physical cylinders on drive */ uint32_t heads; /* number of physical heads on drive */ uint32_t sectors_per_track; /* number of physical sectors per track */ uint64_t sectors; /* total number of sectors on drive */ uint16_t bytes_per_sector; /* bytes per sector */ /* --- v2.0+ --- */ uint32_t dpte_pointer; /* EDD configuration parameters, FFFFh:FFFFh if not available */ /* --- v3.0 --- */ uint16_t device_path_information; /* signature BEDDh to indicate presence of Device Path info */ uint8_t device_path_length; /* length of Device Path information, including signature and this byte (24h for v3.0) */ uint8_t device_path_reserved; /* reserved (0) */ uint16_t device_path_reserved_2; /* reserved (0) */ uint8_t host_bus_type[4]; /* ASCIZ name of host bus ("ISA" or "PCI") */ uint8_t interface_type[8]; /* ASCIZ name of interface type * "ATA" * "ATAPI" * "SCSI" * "USB" * "1394" IEEE 1394 (FireWire) * "FIBRE" Fibre Channel */ /** * Format of EDD v3.0 Interface Path: * Offset Size Description (Table 00275) * ---ISA--- * 00h WORD 16-bit base address * 02h 6 BYTEs reserved (0) * ---PCI--- * 00h BYTE PCI bus number * 01h BYTE PCI device number * 02h BYTE PCI function number * 03h 5 BYTEs reserved (0) **/ union { struct { uint16_t base_address; uint16_t reserved1; uint32_t reserved2; } __attribute__ ((packed)) isa; struct { uint8_t bus; uint8_t slot; uint8_t function; uint8_t channel; uint32_t reserved; } __attribute__ ((packed)) pci; /* pcix is same as pci */ struct { uint64_t reserved; } __attribute__ ((packed)) ibnd; struct { uint64_t reserved; } __attribute__ ((packed)) xprs; struct { uint64_t reserved; } __attribute__ ((packed)) htpt; struct { uint64_t reserved; } __attribute__ ((packed)) unknown; } interface_path; /** * Format of EDD v3.0 Device Path: * Offset Size Description (Table 00276) * ---ATA--- * 00h BYTE flag: 00h = master, 01h = slave * 01h 7 BYTEs reserved (0) * ---ATAPI--- * 00h BYTE flag: 00h = master, 01h = slave * 01h BYTE logical unit number * 02h 6 BYTEs reserved (0) * ---SCSI--- * 00h BYTE logical unit number * 01h 7 BYTEs reserved (0) * ---USB--- * 00h BYTE to be determined * 01h 7 BYTEs reserved (0) * ---IEEE1394--- * 00h QWORD 64-bit FireWire General Unique Identifier (GUID) * ---FibreChannel--- * 00h QWORD Word Wide Number (WWN) **/ union { struct { uint8_t device; uint8_t reserved1; uint16_t reserved2; uint32_t reserved3; uint64_t reserved4; } __attribute__ ((packed)) ata; struct { uint8_t device; uint8_t lun; uint8_t reserved1; uint8_t reserved2; uint32_t reserved3; uint64_t reserved4; } __attribute__ ((packed)) atapi; struct { uint16_t id; uint64_t lun; uint16_t reserved1; uint32_t reserved2; } __attribute__ ((packed)) scsi; struct { uint64_t serial_number; uint64_t reserved; } __attribute__ ((packed)) usb; struct { uint64_t eui; uint64_t reserved; } __attribute__ ((packed)) i1394; struct { uint64_t wwid; uint64_t lun; } __attribute__ ((packed)) fibre; struct { uint64_t identity_tag; uint64_t reserved; } __attribute__ ((packed)) i2o; struct { uint32_t array_number; uint32_t reserved1; uint64_t reserved2; } __attribute__ ((packed)) raid; struct { uint8_t device; uint8_t reserved1; uint16_t reserved2; uint32_t reserved3; uint64_t reserved4; } __attribute__ ((packed)) sata; struct { uint64_t reserved1; uint64_t reserved2; } __attribute__ ((packed)) unknown; } device_path; uint8_t reserved; /* reserved (0) */ uint8_t checksum; /* checksum of bytes 1Eh-40h (two's complement of sum, which makes * the 8-bit sum of bytes 1Eh-41h equal 00h) */ } __attribute__ ((packed)); /* * Disk parameters */ struct driveinfo { int disk; /* Disk port (0x80 - 0xff) */ /* Legacy C/H/S */ int cbios; /* CHS geometry is valid */ int legacy_max_head; int legacy_max_cylinder; int legacy_sectors_per_track; int legacy_max_drive; int legacy_type; /* Drive type (AT/PS2 floppies only) */ /* EDD support */ int ebios; /* EBIOS supported on this disk */ int edd_version; /* EBIOS major version */ int edd_functionality_subset; struct edd_device_parameters edd_params; /* EDD parameters */ }; /** * Format of Phoenix Enhanced Disk Drive Spec translated drive parameter table: * Offset Size Description (Table 00277) * 00h WORD number of cylinders * 02h BYTE number of heads * 03h BYTE A0h (signature indicating translated table) * 04h BYTE number of physical sectors per track * 05h WORD starting write precompensation cylinder number * 07h BYTE reserved * 08h BYTE control byte (see #03198 at INT 41"DISK 0") * 09h WORD number of physical cylinders * 0Bh BYTE number of physical heads * 0Ch WORD cylinder number of landing zone * 0Eh BYTE number of logical sectors per track * 0Fh BYTE checksum * Program: the Phoenix Enhanced Disk Drive Specification is an addition to the * IBM/MS INT 13 extensions * * Format of Phoenix Enhanced Disk Drive Spec Fixed Disk Parameter Table: * Offset Size Description (Table 00278) * 00h WORD physical I/O port base address * 02h WORD disk-drive control port address * 04h BYTE drive flags (see #00279) * 05h BYTE proprietary information * bits 7-4 reserved (0) * bits 3-0: Phoenix proprietary (used by BIOS) * 06h BYTE IRQ for drive (bits 3-0; bits 7-4 reserved and must be 0) * 07h BYTE sector count for multi-sector transfers * 08h BYTE DMA control * bits 7-4: DMA type (0-2) as per ATA-2 specification * bits 3-0: DMA channel * 09h BYTE programmed I/O control * bits 7-4: reserved (0) * bits 3-0: PIO type (1-4) as per ATA-2 specification * 0Ah WORD drive options (see #00280) * 0Ch 2 BYTEs reserved (0) * 0Eh BYTE extension revision level (high nybble=major, low nybble=minor) * (currently 10h for v1.0 and 11h for v1.1-3.0) * 0Fh BYTE 2's complement checksum of bytes 00h-0Eh * 8-bit sum of all bytes 00h-0Fh should equal 00h * SeeAlso: #00277 * * Bitfields for Phoenix Enhanced Disk Drive Spec drive flags: * Bit(s) Description (Table 00279) * 7 reserved (1) * 6 LBA enabled * 5 reserved (1) * 4 drive is slave * 3-0 reserved (0) * SeeAlso: #00278,#00280 * * Bitfields for Phoenix Enhanced Disk Drive Spec drive options: * Bit(s) Description (Table 00280) * 0 fast PIO enabled * 1 fast DMA access enabled * 2 block PIO (multi-sector transfers) enabled * 3 CHS translation enabled * 4 LBA translation enabled * 5 removable media * 6 ATAPI device (CD-ROM) * 7 32-bit transfer mode * ---v1.1+ --- * 8 ATAPI device uses DRQ to signal readiness for packet command * (must be 0 if bit 6 is 0) * 10-9 translation type (must be 00 if bit 3 is 0) * 00 Phoenix bit-shifting translation * 01 LBA-assisted translation * 10 reserved * 11 proprietary translation * ---v3.0--- * 11 Ultra DMA access enabled * 15-12 reserved **/ /* * Values for diskette drive type: * 01h 360K * 02h 1.2M * 03h 720K * 04h 1.44M * 05h ??? * reportedly an obscure drive type shipped on some IBM machines, * 2.88M on some machines (at least AMI 486 BIOS) * 06h 2.88M * 10h ATAPI Removable Media Device */ enum diskette_drive_types { DISKETTE_360K = 1, DISKETTE_1_2M = 2, DISKETTE_720K = 3, DISKETTE_1_44M = 4, DISKETTE_2_88M = 6, DISKETTE_ATAPI = 10, }; /** * chs_to_lba - compute lba value from cylinder, head and sector number **/ static inline int chs_to_lba(const struct driveinfo *drive_info, const unsigned int cylinder, const unsigned int head, const unsigned int sector) { /* Use EDD, if valid */ if (drive_info->edd_params.sectors_per_track > 0 && drive_info->edd_params.heads > 0) return (sector - 1) + (head * drive_info->edd_params.sectors_per_track) + (cylinder * (drive_info->edd_params.heads) * drive_info->edd_params.sectors_per_track); else if (drive_info->cbios) return (sector - 1) + (head * drive_info->legacy_sectors_per_track) + (cylinder * (drive_info->legacy_max_head + 1) * drive_info->legacy_sectors_per_track); } void lba_to_chs(const struct driveinfo *drive_info, const int lba, unsigned int *cylinder, unsigned int *head, unsigned int *sector); int get_drive_parameters(struct driveinfo *drive_info); #endif /* _GEOM_H */