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Diffstat (limited to 'contrib/syslinux-4.02/com32/gplinclude/disk/geom.h')
| -rw-r--r-- | contrib/syslinux-4.02/com32/gplinclude/disk/geom.h | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/gplinclude/disk/geom.h b/contrib/syslinux-4.02/com32/gplinclude/disk/geom.h new file mode 100644 index 0000000..359c7cf --- /dev/null +++ b/contrib/syslinux-4.02/com32/gplinclude/disk/geom.h @@ -0,0 +1,326 @@ +/* ----------------------------------------------------------------------- * + * + * 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 <Matt_Domsch@dell.com> + * + * 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 <stdint.h> + +/** + * 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 */ |