[linux.git] / include / linux / edd.h

/*
 * linux/include/linux/edd.h
 *  Copyright (C) 2002, 2003, 2004 Dell Inc.
 *  by Matt Domsch <[email protected]>
 *
 * 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 */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/include/linux/edd.h
	3	* Copyright (C) 2002, 2003, 2004 Dell Inc.
	4	* by Matt Domsch <[email protected]>
	5	*
	6	* structures and definitions for the int 13h, ax={41,48}h
	7	* BIOS Enhanced Disk Drive Services
	8	* This is based on the T13 group document D1572 Revision 0 (August 14 2002)
	9	* available at http://www.t13.org/docs2002/d1572r0.pdf. It is
	10	* very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf
	11	*
	12	* In a nutshell, arch/{i386,x86_64}/boot/setup.S populates a scratch
	13	* table in the boot_params that contains a list of BIOS-enumerated
	14	* boot devices.
	15	* In arch/{i386,x86_64}/kernel/setup.c, this information is
	16	* transferred into the edd structure, and in drivers/firmware/edd.c, that
	17	* information is used to identify BIOS boot disk. The code in setup.S
	18	* is very sensitive to the size of these structures.
	19	*
	20	* This program is free software; you can redistribute it and/or modify
	21	* it under the terms of the GNU General Public License v2.0 as published by
	22	* the Free Software Foundation
	23	*
	24	* This program is distributed in the hope that it will be useful,
	25	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	26	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	27	* GNU General Public License for more details.
	28	*
	29	*/
	30	#ifndef _LINUX_EDD_H
	31	#define _LINUX_EDD_H
	32
	33	#define EDDNR 0x1e9 /* addr of number of edd_info structs at EDDBUF
	34	in boot_params - treat this as 1 byte */
f9ba7053	35	#define EDDBUF 0xd00 /* addr of edd_info structs in boot_params */
1da177e4 LT	36	#define EDDMAXNR 6 /* number of edd_info structs starting at EDDBUF */
	37	#define EDDEXTSIZE 8 /* change these if you muck with the structures */
	38	#define EDDPARMSIZE 74
	39	#define CHECKEXTENSIONSPRESENT 0x41
	40	#define GETDEVICEPARAMETERS 0x48
	41	#define LEGACYGETDEVICEPARAMETERS 0x08
	42	#define EDDMAGIC1 0x55AA
	43	#define EDDMAGIC2 0xAA55
	44
	45
	46	#define READ_SECTORS 0x02 /* int13 AH=0x02 is READ_SECTORS command */
	47	#define EDD_MBR_SIG_OFFSET 0x1B8 /* offset of signature in the MBR */
	48	#define EDD_MBR_SIG_BUF 0x290 /* addr in boot params */
	49	#define EDD_MBR_SIG_MAX 16 /* max number of signatures to store */
	50	#define EDD_MBR_SIG_NR_BUF 0x1ea /* addr of number of MBR signtaures at EDD_MBR_SIG_BUF
	51	in boot_params - treat this as 1 byte */
	52	#define EDD_CL_EQUALS 0x3d646465 /* "edd=" */
	53	#define EDD_CL_OFF 0x666f /* "of" for off */
	54	#define EDD_CL_SKIP 0x6b73 /* "sk" for skipmbr */
575400d1	55	#define EDD_CL_ON 0x6e6f /* "on" for on */
1da177e4 LT	56
	57	#ifndef __ASSEMBLY__
	58
	59	#define EDD_EXT_FIXED_DISK_ACCESS (1 << 0)
	60	#define EDD_EXT_DEVICE_LOCKING_AND_EJECTING (1 << 1)
	61	#define EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT (1 << 2)
	62	#define EDD_EXT_64BIT_EXTENSIONS (1 << 3)
	63
	64	#define EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT (1 << 0)
	65	#define EDD_INFO_GEOMETRY_VALID (1 << 1)
	66	#define EDD_INFO_REMOVABLE (1 << 2)
	67	#define EDD_INFO_WRITE_VERIFY (1 << 3)
	68	#define EDD_INFO_MEDIA_CHANGE_NOTIFICATION (1 << 4)
	69	#define EDD_INFO_LOCKABLE (1 << 5)
	70	#define EDD_INFO_NO_MEDIA_PRESENT (1 << 6)
	71	#define EDD_INFO_USE_INT13_FN50 (1 << 7)
	72
	73	struct edd_device_params {
	74	u16 length;
	75	u16 info_flags;
	76	u32 num_default_cylinders;
	77	u32 num_default_heads;
	78	u32 sectors_per_track;
	79	u64 number_of_sectors;
	80	u16 bytes_per_sector;
	81	u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */
	82	u16 key; /* = 0xBEDD */
	83	u8 device_path_info_length; /* = 44 */
	84	u8 reserved2;
	85	u16 reserved3;
	86	u8 host_bus_type[4];
	87	u8 interface_type[8];
	88	union {
	89	struct {
	90	u16 base_address;
	91	u16 reserved1;
	92	u32 reserved2;
	93	} __attribute__ ((packed)) isa;
	94	struct {
	95	u8 bus;
	96	u8 slot;
	97	u8 function;
	98	u8 channel;
	99	u32 reserved;
	100	} __attribute__ ((packed)) pci;
	101	/* pcix is same as pci */
	102	struct {
	103	u64 reserved;
	104	} __attribute__ ((packed)) ibnd;
	105	struct {
	106	u64 reserved;
	107	} __attribute__ ((packed)) xprs;
	108	struct {
	109	u64 reserved;
	110	} __attribute__ ((packed)) htpt;
	111	struct {
	112	u64 reserved;
	113	} __attribute__ ((packed)) unknown;
	114	} interface_path;
	115	union {
	116	struct {
	117	u8 device;
	118	u8 reserved1;
	119	u16 reserved2;
120	u32 reserved3;
121	u64 reserved4;
122	} __attribute__ ((packed)) ata;
123	struct {
124	u8 device;
125	u8 lun;
126	u8 reserved1;
127	u8 reserved2;
128	u32 reserved3;
129	u64 reserved4;
130	} __attribute__ ((packed)) atapi;
131	struct {
132	u16 id;
133	u64 lun;
134	u16 reserved1;
135	u32 reserved2;
136	} __attribute__ ((packed)) scsi;
137	struct {
138	u64 serial_number;
139	u64 reserved;
140	} __attribute__ ((packed)) usb;
141	struct {
142	u64 eui;
143	u64 reserved;
144	} __attribute__ ((packed)) i1394;
145	struct {
146	u64 wwid;
147	u64 lun;
148	} __attribute__ ((packed)) fibre;
149	struct {
150	u64 identity_tag;
151	u64 reserved;
152	} __attribute__ ((packed)) i2o;
153	struct {
154	u32 array_number;
155	u32 reserved1;
156	u64 reserved2;
157	} __attribute__ ((packed)) raid;
158	struct {
159	u8 device;
160	u8 reserved1;
161	u16 reserved2;
162	u32 reserved3;
163	u64 reserved4;
164	} __attribute__ ((packed)) sata;
165	struct {
166	u64 reserved1;
167	u64 reserved2;
168	} __attribute__ ((packed)) unknown;
169	} device_path;
170	u8 reserved4;
171	u8 checksum;
172	} __attribute__ ((packed));
173
174	struct edd_info {
175	u8 device;
176	u8 version;
177	u16 interface_support;
178	u16 legacy_max_cylinder;
179	u8 legacy_max_head;
180	u8 legacy_sectors_per_track;
181	struct edd_device_params params;
182	} __attribute__ ((packed));
183
184	struct edd {
185	unsigned int mbr_signature[EDD_MBR_SIG_MAX];
186	struct edd_info edd_info[EDDMAXNR];
187	unsigned char mbr_signature_nr;
188	unsigned char edd_info_nr;
189	};
190
191	extern struct edd edd;
192
193	#endif /!__ASSEMBLY__ /
194
195	#endif /* _LINUX_EDD_H */