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422 giacomo 1 
/*
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 * linux/include/asm-i386/edd.h
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 *  Copyright (C) 2002 Dell Inc.
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 *  by Matt Domsch <Matt_Domsch@dell.com>
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 *
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 * structures and definitions for the int 13h, ax={41,48}h
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 * BIOS Enhanced Disk Drive Services
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 * This is based on the T13 group document D1572 Revision 0 (August 14 2002)
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 * available at http://www.t13.org/docs2002/d1572r0.pdf.  It is
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 * very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf
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 *
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 * In a nutshell, arch/i386/boot/setup.S populates a scratch table
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 * in the empty_zero_block that contains a list of BIOS-enumerated
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 * boot devices.
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 * In arch/i386/kernel/setup.c, this information is
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 * transferred into the edd structure, and in arch/i386/kernel/edd.c, that
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 * information is used to identify BIOS boot disk.  The code in setup.S
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 * is very sensitive to the size of these structures.
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License v2.0 as published by
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 * the Free Software Foundation
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 */
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#ifndef _ASM_I386_EDD_H
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#define _ASM_I386_EDD_H
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#define EDDNR 0x1e9             /* addr of number of edd_info structs at EDDBUF
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                                   in empty_zero_block - treat this as 1 byte  */
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#define EDDBUF  0x600           /* addr of edd_info structs in empty_zero_block */
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#define EDDMAXNR 6              /* number of edd_info structs starting at EDDBUF  */
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#define EDDEXTSIZE 4            /* change these if you muck with the structures */
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#define EDDPARMSIZE 74
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#define CHECKEXTENSIONSPRESENT 0x41
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#define GETDEVICEPARAMETERS 0x48
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#define EDDMAGIC1 0x55AA
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#define EDDMAGIC2 0xAA55
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#ifndef __ASSEMBLY__
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#define EDD_EXT_FIXED_DISK_ACCESS           (1 << 0)
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#define EDD_EXT_DEVICE_LOCKING_AND_EJECTING (1 << 1)
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#define EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT (1 << 2)
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#define EDD_EXT_64BIT_EXTENSIONS            (1 << 3)
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#define EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT (1 << 0)
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#define EDD_INFO_GEOMETRY_VALID                (1 << 1)
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#define EDD_INFO_REMOVABLE                     (1 << 2)
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#define EDD_INFO_WRITE_VERIFY                  (1 << 3)
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#define EDD_INFO_MEDIA_CHANGE_NOTIFICATION     (1 << 4)
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#define EDD_INFO_LOCKABLE                      (1 << 5)
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#define EDD_INFO_NO_MEDIA_PRESENT              (1 << 6)
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#define EDD_INFO_USE_INT13_FN50                (1 << 7)
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struct edd_device_params {
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        u16 length;
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        u16 info_flags;
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        u32 num_default_cylinders;
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        u32 num_default_heads;
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        u32 sectors_per_track;
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        u64 number_of_sectors;
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        u16 bytes_per_sector;
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        u32 dpte_ptr;           /* 0xFFFFFFFF for our purposes */
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        u16 key;                /* = 0xBEDD */
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        u8 device_path_info_length;     /* = 44 */
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        u8 reserved2;
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        u16 reserved3;
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        u8 host_bus_type[4];
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        u8 interface_type[8];
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        union {
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                struct {
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                        u16 base_address;
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                        u16 reserved1;
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                        u32 reserved2;
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                } __attribute__ ((packed)) isa;
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                struct {
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                        u8 bus;
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                        u8 slot;
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                        u8 function;
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                        u8 channel;
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                        u32 reserved;
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                } __attribute__ ((packed)) pci;
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                /* pcix is same as pci */
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                struct {
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                        u64 reserved;
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                } __attribute__ ((packed)) ibnd;
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                struct {
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                        u64 reserved;
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                } __attribute__ ((packed)) xprs;
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                struct {
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                        u64 reserved;
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                } __attribute__ ((packed)) htpt;
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                struct {
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                        u64 reserved;
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                } __attribute__ ((packed)) unknown;
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        } interface_path;
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        union {
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                struct {
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                        u8 device;
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                        u8 reserved1;
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                        u16 reserved2;
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                        u32 reserved3;
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                        u64 reserved4;
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                } __attribute__ ((packed)) ata;
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                struct {
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                        u8 device;
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                        u8 lun;
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                        u8 reserved1;
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                        u8 reserved2;
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                        u32 reserved3;
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                        u64 reserved4;
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                } __attribute__ ((packed)) atapi;
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                struct {
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                        u16 id;
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                        u64 lun;
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                        u16 reserved1;
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                        u32 reserved2;
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                } __attribute__ ((packed)) scsi;
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                struct {
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                        u64 serial_number;
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                        u64 reserved;
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                } __attribute__ ((packed)) usb;
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                struct {
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                        u64 eui;
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                        u64 reserved;
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                } __attribute__ ((packed)) i1394;
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                struct {
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                        u64 wwid;
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                        u64 lun;
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                } __attribute__ ((packed)) fibre;
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                struct {
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                        u64 identity_tag;
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                        u64 reserved;
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                } __attribute__ ((packed)) i2o;
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                struct {
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                        u32 array_number;
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                        u32 reserved1;
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                        u64 reserved2;
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                } __attribute__ ((packed)) raid;
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                struct {
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                        u8 device;
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                        u8 reserved1;
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                        u16 reserved2;
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                        u32 reserved3;
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                        u64 reserved4;
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                } __attribute__ ((packed)) sata;
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                struct {
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                        u64 reserved1;
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                        u64 reserved2;
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                } __attribute__ ((packed)) unknown;
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        } device_path;
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        u8 reserved4;
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        u8 checksum;
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} __attribute__ ((packed));
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struct edd_info {
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        u8 device;
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        u8 version;
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        u16 interface_support;
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        struct edd_device_params params;
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} __attribute__ ((packed));
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extern struct edd_info edd[EDDMAXNR];
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extern unsigned char eddnr;
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#endif                          /*!__ASSEMBLY__ */
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#endif                          /* _ASM_I386_EDD_H */