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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 */
#define EDD_CL_EQUALS 0x3d646465 /* "edd=" */
#define EDD_CL_OFF 0x666f /* "of" for off */
#define EDD_CL_SKIP 0x6b73 /* "sk" for skipmbr */
#define EDD_CL_ON 0x6e6f /* "on" for on */
#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;
};
extern struct edd edd;
#endif /*!__ASSEMBLY__ */
#endif /* _LINUX_EDD_H */
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