/*
 * Copyright 2004-2006, Axel Dörfler, axeld@pinc-software.de.
 * Distributed under the terms of the MIT License.
 */
#ifndef KERNEL_BOOT_DISK_IDENTIFIER_H
#define KERNEL_BOOT_DISK_IDENTIFIER_H


#include <SupportDefs.h>


enum bus_types {
        UNKNOWN_BUS,
        LEGACY_BUS,
        PCI_BUS,
};

enum device_types {
        UNKNOWN_DEVICE,
        ATA_DEVICE,
        ATAPI_DEVICE,
        SCSI_DEVICE,
        USB_DEVICE,
        FIREWIRE_DEVICE,
        FIBRE_DEVICE,
};

#define NUM_DISK_CHECK_SUMS 5

typedef struct disk_identifier {
        int32                           bus_type;
        int32                           device_type;

        union {
                struct {
                        uint16          base_address;
                } _PACKED legacy;
                struct {
                        uint8           bus;
                        uint8           slot;
                        uint8           function;
                } _PACKED pci;
        } bus;
        union {
                struct {
                        bool            master;
                } _PACKED ata;
                struct {
                        bool            master;
                        uint8           logical_unit;
                } _PACKED atapi;
                struct {
                        uint8           logical_unit;
                } _PACKED scsi;
                struct {
                        uint8           tbd;
                } _PACKED usb;
                struct {
                        uint64          guid;
                } _PACKED firewire;
                struct {
                        uint64          wwd;
                } _PACKED fibre;
                struct {
                        off_t           size;
                        struct {
                                off_t   offset;
                                uint32  sum;
                        } _PACKED check_sums[NUM_DISK_CHECK_SUMS];
                } _PACKED unknown;
        } device;
} _PACKED disk_identifier;

#endif  /* KERNEL_BOOT_DISK_IDENTIFIER_H */