--- /dev/null
+#ifndef INT13_H
+#define INT13_H
+
+/** @file
+ *
+ * INT 13 emulation
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdint.h>
+#include <ipxe/list.h>
+#include <ipxe/edd.h>
+#include <realmode.h>
+
+/**
+ * @defgroup int13ops INT 13 operation codes
+ * @{
+ */
+
+/** Reset disk system */
+#define INT13_RESET 0x00
+/** Get status of last operation */
+#define INT13_GET_LAST_STATUS 0x01
+/** Read sectors */
+#define INT13_READ_SECTORS 0x02
+/** Write sectors */
+#define INT13_WRITE_SECTORS 0x03
+/** Get drive parameters */
+#define INT13_GET_PARAMETERS 0x08
+/** Get disk type */
+#define INT13_GET_DISK_TYPE 0x15
+/** Extensions installation check */
+#define INT13_EXTENSION_CHECK 0x41
+/** Extended read */
+#define INT13_EXTENDED_READ 0x42
+/** Extended write */
+#define INT13_EXTENDED_WRITE 0x43
+/** Verify sectors */
+#define INT13_EXTENDED_VERIFY 0x44
+/** Extended seek */
+#define INT13_EXTENDED_SEEK 0x47
+/** Get extended drive parameters */
+#define INT13_GET_EXTENDED_PARAMETERS 0x48
+/** Get CD-ROM status / terminate emulation */
+#define INT13_CDROM_STATUS_TERMINATE 0x4b
+/** Read CD-ROM boot catalog */
+#define INT13_CDROM_READ_BOOT_CATALOG 0x4d
+
+/** @} */
+
+/**
+ * @defgroup int13status INT 13 status codes
+ * @{
+ */
+
+/** Operation completed successfully */
+#define INT13_STATUS_SUCCESS 0x00
+/** Invalid function or parameter */
+#define INT13_STATUS_INVALID 0x01
+/** Read error */
+#define INT13_STATUS_READ_ERROR 0x04
+/** Reset failed */
+#define INT13_STATUS_RESET_FAILED 0x05
+/** Write error */
+#define INT13_STATUS_WRITE_ERROR 0xcc
+
+/** @} */
+
+/** Block size for non-extended INT 13 calls */
+#define INT13_BLKSIZE 512
+
+/** @defgroup int13fddtype INT 13 floppy disk drive types
+ * @{
+ */
+
+/** 360K */
+#define INT13_FDD_TYPE_360K 0x01
+/** 1.2M */
+#define INT13_FDD_TYPE_1M2 0x02
+/** 720K */
+#define INT13_FDD_TYPE_720K 0x03
+/** 1.44M */
+#define INT13_FDD_TYPE_1M44 0x04
+
+/** An INT 13 disk address packet */
+struct int13_disk_address {
+ /** Size of the packet, in bytes */
+ uint8_t bufsize;
+ /** Reserved */
+ uint8_t reserved_a;
+ /** Block count */
+ uint8_t count;
+ /** Reserved */
+ uint8_t reserved_b;
+ /** Data buffer */
+ struct segoff buffer;
+ /** Starting block number */
+ uint64_t lba;
+ /** Data buffer (EDD 3.0+ only) */
+ uint64_t buffer_phys;
+ /** Block count (EDD 4.0+ only) */
+ uint32_t long_count;
+ /** Reserved */
+ uint32_t reserved_c;
+} __attribute__ (( packed ));
+
+/** INT 13 disk parameters */
+struct int13_disk_parameters {
+ /** Size of this structure */
+ uint16_t bufsize;
+ /** Flags */
+ uint16_t flags;
+ /** Number of cylinders */
+ uint32_t cylinders;
+ /** Number of heads */
+ uint32_t heads;
+ /** Number of sectors per track */
+ uint32_t sectors_per_track;
+ /** Total number of sectors on drive */
+ uint64_t sectors;
+ /** Bytes per sector */
+ uint16_t sector_size;
+ /** Device parameter table extension */
+ struct segoff dpte;
+ /** Device path information */
+ struct edd_device_path_information dpi;
+} __attribute__ (( packed ));
+
+/**
+ * @defgroup int13types INT 13 disk types
+ * @{
+ */
+
+/** No such drive */
+#define INT13_DISK_TYPE_NONE 0x00
+/** Floppy without change-line support */
+#define INT13_DISK_TYPE_FDD 0x01
+/** Floppy with change-line support */
+#define INT13_DISK_TYPE_FDD_CL 0x02
+/** Hard disk */
+#define INT13_DISK_TYPE_HDD 0x03
+
+/** @} */
+
+/**
+ * @defgroup int13flags INT 13 disk parameter flags
+ * @{
+ */
+
+/** DMA boundary errors handled transparently */
+#define INT13_FL_DMA_TRANSPARENT 0x01
+/** CHS information is valid */
+#define INT13_FL_CHS_VALID 0x02
+/** Removable drive */
+#define INT13_FL_REMOVABLE 0x04
+/** Write with verify supported */
+#define INT13_FL_VERIFIABLE 0x08
+/** Has change-line supported (valid only for removable drives) */
+#define INT13_FL_CHANGE_LINE 0x10
+/** Drive can be locked (valid only for removable drives) */
+#define INT13_FL_LOCKABLE 0x20
+/** CHS is max possible, not current media (valid only for removable drives) */
+#define INT13_FL_CHS_MAX 0x40
+
+/** @} */
+
+/**
+ * @defgroup int13exts INT 13 extension flags
+ * @{
+ */
+
+/** Extended disk access functions supported */
+#define INT13_EXTENSION_LINEAR 0x01
+/** Removable drive functions supported */
+#define INT13_EXTENSION_REMOVABLE 0x02
+/** EDD functions supported */
+#define INT13_EXTENSION_EDD 0x04
+/** 64-bit extensions are present */
+#define INT13_EXTENSION_64BIT 0x08
+
+/** @} */
+
+/**
+ * @defgroup int13vers INT 13 extension versions
+ * @{
+ */
+
+/** INT13 extensions version 1.x */
+#define INT13_EXTENSION_VER_1_X 0x01
+/** INT13 extensions version 2.0 (EDD-1.0) */
+#define INT13_EXTENSION_VER_2_0 0x20
+/** INT13 extensions version 2.1 (EDD-1.1) */
+#define INT13_EXTENSION_VER_2_1 0x21
+/** INT13 extensions version 3.0 (EDD-3.0) */
+#define INT13_EXTENSION_VER_3_0 0x30
+
+/** @} */
+
+/** Maximum number of sectors for which CHS geometry is allowed to be valid
+ *
+ * This number is taken from the EDD specification.
+ */
+#define INT13_MAX_CHS_SECTORS 15482880
+
+/** Bootable CD-ROM specification packet */
+struct int13_cdrom_specification {
+ /** Size of packet in bytes */
+ uint8_t size;
+ /** Boot media type */
+ uint8_t media_type;
+ /** Drive number */
+ uint8_t drive;
+ /** CD-ROM controller number */
+ uint8_t controller;
+ /** LBA of disk image to emulate */
+ uint32_t lba;
+ /** Device specification */
+ uint16_t device;
+ /** Segment of 3K buffer for caching CD-ROM reads */
+ uint16_t cache_segment;
+ /** Load segment for initial boot image */
+ uint16_t load_segment;
+ /** Number of 512-byte sectors to load */
+ uint16_t load_sectors;
+ /** Low 8 bits of cylinder number */
+ uint8_t cyl;
+ /** Sector number, plus high 2 bits of cylinder number */
+ uint8_t cyl_sector;
+ /** Head number */
+ uint8_t head;
+} __attribute__ (( packed ));
+
+/** Bootable CD-ROM boot catalog command packet */
+struct int13_cdrom_boot_catalog_command {
+ /** Size of packet in bytes */
+ uint8_t size;
+ /** Number of sectors of boot catalog to read */
+ uint8_t count;
+ /** Buffer for boot catalog */
+ uint32_t buffer;
+ /** First sector in boot catalog to transfer */
+ uint16_t start;
+} __attribute__ (( packed ));
+
+/** A C/H/S address within a partition table entry */
+struct partition_chs {
+ /** Head number */
+ uint8_t head;
+ /** Sector number, plus high 2 bits of cylinder number */
+ uint8_t cyl_sector;
+ /** Low 8 bits of cylinder number */
+ uint8_t cyl;
+} __attribute__ (( packed ));
+
+#define PART_HEAD(chs) ( (chs).head )
+#define PART_SECTOR(chs) ( (chs).cyl_sector & 0x3f )
+#define PART_CYLINDER(chs) ( (chs).cyl | ( ( (chs).cyl_sector & 0xc0 ) << 2 ) )
+
+/** A partition table entry within the MBR */
+struct partition_table_entry {
+ /** Bootable flag */
+ uint8_t bootable;
+ /** C/H/S start address */
+ struct partition_chs chs_start;
+ /** System indicator (partition type) */
+ uint8_t type;
+ /** C/H/S end address */
+ struct partition_chs chs_end;
+ /** Linear start address */
+ uint32_t start;
+ /** Linear length */
+ uint32_t length;
+} __attribute__ (( packed ));
+
+/** A Master Boot Record */
+struct master_boot_record {
+ /** Code area */
+ uint8_t code[440];
+ /** Disk signature */
+ uint32_t signature;
+ /** Padding */
+ uint8_t pad[2];
+ /** Partition table */
+ struct partition_table_entry partitions[4];
+ /** 0x55aa MBR signature */
+ uint16_t magic;
+} __attribute__ (( packed ));
+
+/** MBR magic signature */
+#define INT13_MBR_MAGIC 0xaa55
+
+/** A floppy disk geometry */
+struct int13_fdd_geometry {
+ /** Number of tracks */
+ uint8_t tracks;
+ /** Number of heads and sectors per track */
+ uint8_t heads_spt;
+};
+
+/** Define a floppy disk geometry */
+#define INT13_FDD_GEOMETRY( cylinders, heads, sectors ) \
+ { \
+ .tracks = (cylinders), \
+ .heads_spt = ( ( (heads) << 6 ) | (sectors) ), \
+ }
+
+/** Get floppy disk number of cylinders */
+#define INT13_FDD_CYLINDERS( geometry ) ( (geometry)->tracks )
+
+/** Get floppy disk number of heads */
+#define INT13_FDD_HEADS( geometry ) ( (geometry)->heads_spt >> 6 )
+
+/** Get floppy disk number of sectors per track */
+#define INT13_FDD_SECTORS( geometry ) ( (geometry)->heads_spt & 0x3f )
+
+/** A floppy drive parameter table */
+struct int13_fdd_parameters {
+ uint8_t step_rate__head_unload;
+ uint8_t head_load__ndma;
+ uint8_t motor_off_delay;
+ uint8_t bytes_per_sector;
+ uint8_t sectors_per_track;
+ uint8_t gap_length;
+ uint8_t data_length;
+ uint8_t format_gap_length;
+ uint8_t format_filler;
+ uint8_t head_settle_time;
+ uint8_t motor_start_time;
+} __attribute__ (( packed ));
+
+#endif /* INT13_H */
Code Review / kvmfornfv.git / blobdiff