/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _SYS_BIOSDISK_H
#define _SYS_BIOSDISK_H

#include <sys/types.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef union device_path {
        struct {                        /* ATA or ATAPI or SATA */
                unsigned char   chan;   /* 0 or 1 */
                unsigned char   lun;    /* for ATAPI only */
        } ata;
        struct {
                unsigned short  target;
                uint32_t        lun_lo;
                uint32_t        lun_hi;
        } scsi;
        struct {
                uint64_t        usb_serial_id;
        } usb;
        struct {
                uint64_t        eui;
        } s1394;
        struct {
                uint64_t        wwid;
                uint64_t        lun;
        } fibre;
        struct {
                uint64_t        id_tag;
        } i2o;

        struct {
                uint32_t        raid_array_num;
        } raid;
        unsigned char pad[16];          /* total length */
} device_path_t;


typedef union interface_path {
                struct {
                        unsigned short  baseport;
                } isa;
                struct {                /* PCI or PCIX */
                        unsigned char bus;
                        unsigned char device;
                        unsigned char function;
                        unsigned char channel;
                } pci;
                char    pad[8];
} interface_path_t;

/*
 * Structure for Int 13 function 48 (EDD 3.0)
 *
 * from T13/1484D Revision 2
 */

#pragma pack(1)
typedef struct int13_fn48_result {
        unsigned short          buflen;
        unsigned short          flags;
        uint32_t                ncyl;
        uint32_t                nhead;
        uint32_t                spt;
        uint32_t                nsect_lo;
        uint32_t                nsect_hi;
        unsigned short          bps;
        uint32_t                dpte;
        unsigned short          magic;          /* BEDD if Path info there */
        unsigned char           pathinfo_len;
        unsigned char           res1;
        unsigned short          res2;
        char                    bustype[4];     /* offset 36 */
        char                    interface_type[8];
        interface_path_t        interfacepath;
        device_path_t           devicepath;
        unsigned char           res3;
        unsigned char           checksum;       /* offset 73 */
} fn48_t;

typedef struct int13_fn4b_result {
        uint8_t         pkt_size;       /* Packet size (== 0x13) */

        uint8_t         boot_mtype;     /* Boot media type: see defines below */

        uint8_t         drivenum;
        uint8_t         ctlr_idx;
        uint32_t        lba;
        uint16_t        dev_spec;
        uint16_t        buf_seg;
        uint16_t        load_seg;
        uint16_t        sect_cnt;
        uint8_t         cyl_0_7;        /* Bits 0-7 of the 9-bit cylinder cnt */
        /*
         * Bits 0-5: Sector count
         *      6-7: High 2 bits of the 9-bit cylinder count
         */
        uint8_t         sec_0_5_and_cyl_8_9;
        uint8_t         head_cnt;
} fn4b_t;

#pragma pack()

typedef struct biosdev_data {
        uchar_t                 first_block_valid;
        uchar_t                 first_block[512];
        uchar_t                 edd_valid;
        fn48_t                  fn48_dev_params;
} biosdev_data_t;

/*
 * Definitions for boot_mtype in fn4b_t
 */
#define BOOT_MTYPE_MASK                 0xF
#define BOOT_MTYPE(x)                   ((x) & BOOT_MTYPE_MASK)
#define BOOT_MTYPE_NO_EMUL              0
#define BOOT_MTYPE_1_2M_FLOPPY          1
#define BOOT_MTYPE_1_44M_FLOPPY         2
#define BOOT_MTYPE_2_88M_FLOPPY         3
#define BOOT_MTYPE_HARD_DISK            4
#define BOOT_MTYPE_INTF_MASK            0xC0
#define BOOT_MTYPE_INTF_ATAPI           0x40
#define BOOT_MTYPE_INTF_SCSI            0x80
#define BOOT_MTYPE_IS_ATAPI(x) \
        (((x) & BOOT_MTYPE_INTF_MASK) == BOOT_MTYPE_INTF_ATAPI)
#define BOOT_MTYPE_IS_SCSI(x) \
        (((x) & BOOT_MTYPE_INTF_MASK) == BOOT_MTYPE_INTF_SCSI)

#ifdef __cplusplus
}
#endif

#endif /* _SYS_BIOSDISK_H */