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/*

 * linux/include/linux/edd.h

 *  Copyright (C) 2002, 2003, 2004 Dell Inc.

 *  by Matt Domsch <Matt_Domsch@dell.com>

 *

 * structures and definitions for the int 13h, ax={41,48}h

 * BIOS Enhanced Disk Drive Services

 * This is based on the T13 group document D1572 Revision 0 (August 14 2002)

 * available at http://www.t13.org/docs2002/d1572r0.pdf.  It is

 * very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf

 *

 * In a nutshell, arch/{i386,x86_64}/boot/setup.S populates a scratch

 * table in the boot_params that contains a list of BIOS-enumerated

 * boot devices.

 * In arch/{i386,x86_64}/kernel/setup.c, this information is

 * transferred into the edd structure, and in drivers/firmware/edd.c, that

 * information is used to identify BIOS boot disk.  The code in setup.S

 * is very sensitive to the size of these structures.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License v2.0 as published by

 * the Free Software Foundation

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */

#ifndef _LINUX_EDD_H

#define _LINUX_EDD_H

#define EDDNR 0x1e9             /* addr of number of edd_info structs at EDDBUF

                                   in boot_params - treat this as 1 byte  */

#define EDDBUF  0xd00           /* addr of edd_info structs in boot_params */

#define EDDMAXNR 6              /* number of edd_info structs starting at EDDBUF  */

#define EDDEXTSIZE 8            /* change these if you muck with the structures */

#define EDDPARMSIZE 74

#define CHECKEXTENSIONSPRESENT 0x41

#define GETDEVICEPARAMETERS 0x48

#define LEGACYGETDEVICEPARAMETERS 0x08

#define EDDMAGIC1 0x55AA

#define EDDMAGIC2 0xAA55

#define READ_SECTORS 0x02         /* int13 AH=0x02 is READ_SECTORS command */

#define EDD_MBR_SIG_OFFSET 0x1B8  /* offset of signature in the MBR */

#define EDD_MBR_SIG_BUF    0x290  /* addr in boot params */

#define EDD_MBR_SIG_MAX 16        /* max number of signatures to store */

#define EDD_MBR_SIG_NR_BUF 0x1ea  /* addr of number of MBR signtaures at EDD_MBR_SIG_BUF

                                     in boot_params - treat this as 1 byte  */

#ifndef __ASSEMBLY__

#define EDD_EXT_FIXED_DISK_ACCESS           (1 << 0)

#define EDD_EXT_DEVICE_LOCKING_AND_EJECTING (1 << 1)

#define EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT (1 << 2)

#define EDD_EXT_64BIT_EXTENSIONS            (1 << 3)

#define EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT (1 << 0)

#define EDD_INFO_GEOMETRY_VALID                (1 << 1)

#define EDD_INFO_REMOVABLE                     (1 << 2)

#define EDD_INFO_WRITE_VERIFY                  (1 << 3)

#define EDD_INFO_MEDIA_CHANGE_NOTIFICATION     (1 << 4)

#define EDD_INFO_LOCKABLE                      (1 << 5)

#define EDD_INFO_NO_MEDIA_PRESENT              (1 << 6)

#define EDD_INFO_USE_INT13_FN50                (1 << 7)

struct edd_device_params {

        __u16 length;

        __u16 info_flags;

        __u32 num_default_cylinders;

        __u32 num_default_heads;

        __u32 sectors_per_track;

        __u64 number_of_sectors;

        __u16 bytes_per_sector;

        __u32 dpte_ptr;         /* 0xFFFFFFFF for our purposes */

        __u16 key;              /* = 0xBEDD */

        __u8 device_path_info_length;   /* = 44 */

        __u8 reserved2;

        __u16 reserved3;

        __u8 host_bus_type[4];

        __u8 interface_type[8];

        union {

                struct {

                        __u16 base_address;

                        __u16 reserved1;

                        __u32 reserved2;

                } __attribute__ ((packed)) isa;

                struct {

                        __u8 bus;

                        __u8 slot;

                        __u8 function;

                        __u8 channel;

                        __u32 reserved;

                } __attribute__ ((packed)) pci;

                /* pcix is same as pci */

                struct {

                        __u64 reserved;

                } __attribute__ ((packed)) ibnd;

                struct {

                        __u64 reserved;

                } __attribute__ ((packed)) xprs;

                struct {

                        __u64 reserved;

                } __attribute__ ((packed)) htpt;

                struct {

                        __u64 reserved;

                } __attribute__ ((packed)) unknown;

        } interface_path;

        union {

                struct {

                        __u8 device;

                        __u8 reserved1;

                        __u16 reserved2;

                        __u32 reserved3;

                        __u64 reserved4;

                } __attribute__ ((packed)) ata;

                struct {

                        __u8 device;

                        __u8 lun;

                        __u8 reserved1;

                        __u8 reserved2;

                        __u32 reserved3;

                        __u64 reserved4;

                } __attribute__ ((packed)) atapi;

                struct {

                        __u16 id;

                        __u64 lun;

                        __u16 reserved1;

                        __u32 reserved2;

                } __attribute__ ((packed)) scsi;

                struct {

                        __u64 serial_number;

                        __u64 reserved;

                } __attribute__ ((packed)) usb;

                struct {

                        __u64 eui;

                        __u64 reserved;

                } __attribute__ ((packed)) i1394;

                struct {

                        __u64 wwid;

                        __u64 lun;

                } __attribute__ ((packed)) fibre;

                struct {

                        __u64 identity_tag;

                        __u64 reserved;

                } __attribute__ ((packed)) i2o;

                struct {

                        __u32 array_number;

                        __u32 reserved1;

                        __u64 reserved2;

                } __attribute__ ((packed)) raid;

                struct {

                        __u8 device;

                        __u8 reserved1;

                        __u16 reserved2;

                        __u32 reserved3;

                        __u64 reserved4;

                } __attribute__ ((packed)) sata;

                struct {

                        __u64 reserved1;

                        __u64 reserved2;

                } __attribute__ ((packed)) unknown;

        } device_path;

        __u8 reserved4;

        __u8 checksum;

} __attribute__ ((packed));

struct edd_info {

        __u8 device;

        __u8 version;

        __u16 interface_support;

        __u16 legacy_max_cylinder;

        __u8 legacy_max_head;

        __u8 legacy_sectors_per_track;

        struct edd_device_params params;

} __attribute__ ((packed));

struct edd {

        unsigned int mbr_signature[EDD_MBR_SIG_MAX];

        struct edd_info edd_info[EDDMAXNR];

        unsigned char mbr_signature_nr;

        unsigned char edd_info_nr;

};

#ifdef __KERNEL__

extern struct edd edd;

#endif /* __KERNEL__ */

#endif                          /*!__ASSEMBLY__ */

#endif                          /* _LINUX_EDD_H */