[people/ms/u-boot.git] / include / linux / edd.h

/*
 * 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.
 *
 * SPDX-License-Identifier:	GPL-2.0
 */
#ifndef _LINUX_EDD_H
#define _LINUX_EDD_H

#include <linux/types.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 */
Commit	Line	Data
95ffaba3 GR	1	/*
	2	* linux/include/linux/edd.h
	3	* Copyright (C) 2002, 2003, 2004 Dell Inc.
	4	* by Matt Domsch <Matt_Domsch@dell.com>
	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	*
5b8031cc	20	* SPDX-License-Identifier: GPL-2.0
95ffaba3 GR	21	*/
	22	#ifndef _LINUX_EDD_H
	23	#define _LINUX_EDD_H
	24
	25	#include <linux/types.h>
	26
	27	#define EDDNR 0x1e9 /* addr of number of edd_info structs at EDDBUF
	28	in boot_params - treat this as 1 byte */
	29	#define EDDBUF 0xd00 /* addr of edd_info structs in boot_params */
	30	#define EDDMAXNR 6 /* number of edd_info structs starting at EDDBUF */
	31	#define EDDEXTSIZE 8 /* change these if you muck with the structures */
	32	#define EDDPARMSIZE 74
	33	#define CHECKEXTENSIONSPRESENT 0x41
	34	#define GETDEVICEPARAMETERS 0x48
	35	#define LEGACYGETDEVICEPARAMETERS 0x08
	36	#define EDDMAGIC1 0x55AA
	37	#define EDDMAGIC2 0xAA55
	38
	39
	40	#define READ_SECTORS 0x02 /* int13 AH=0x02 is READ_SECTORS command */
	41	#define EDD_MBR_SIG_OFFSET 0x1B8 /* offset of signature in the MBR */
	42	#define EDD_MBR_SIG_BUF 0x290 /* addr in boot params */
	43	#define EDD_MBR_SIG_MAX 16 /* max number of signatures to store */
	44	#define EDD_MBR_SIG_NR_BUF 0x1ea /* addr of number of MBR signtaures at EDD_MBR_SIG_BUF
	45	in boot_params - treat this as 1 byte */
	46
	47	#ifndef __ASSEMBLY__
	48
	49	#define EDD_EXT_FIXED_DISK_ACCESS (1 << 0)
	50	#define EDD_EXT_DEVICE_LOCKING_AND_EJECTING (1 << 1)
	51	#define EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT (1 << 2)
	52	#define EDD_EXT_64BIT_EXTENSIONS (1 << 3)
	53
	54	#define EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT (1 << 0)
	55	#define EDD_INFO_GEOMETRY_VALID (1 << 1)
	56	#define EDD_INFO_REMOVABLE (1 << 2)
	57	#define EDD_INFO_WRITE_VERIFY (1 << 3)
	58	#define EDD_INFO_MEDIA_CHANGE_NOTIFICATION (1 << 4)
	59	#define EDD_INFO_LOCKABLE (1 << 5)
	60	#define EDD_INFO_NO_MEDIA_PRESENT (1 << 6)
	61	#define EDD_INFO_USE_INT13_FN50 (1 << 7)
	62
	63	struct edd_device_params {
	64	__u16 length;
	65	__u16 info_flags;
	66	__u32 num_default_cylinders;
	67	__u32 num_default_heads;
	68	__u32 sectors_per_track;
	69	__u64 number_of_sectors;
	70	__u16 bytes_per_sector;
	71	__u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */
	72	__u16 key; /* = 0xBEDD */
	73	__u8 device_path_info_length; /* = 44 */
	74	__u8 reserved2;
	75	__u16 reserved3;
	76	__u8 host_bus_type[4];
	77	__u8 interface_type[8];
	78	union {
	79	struct {
	80	__u16 base_address;
	81	__u16 reserved1;
	82	__u32 reserved2;
	83	} __attribute__ ((packed)) isa;
	84	struct {
85	__u8 bus;
86	__u8 slot;
87	__u8 function;
88	__u8 channel;
89	__u32 reserved;
90	} __attribute__ ((packed)) pci;
91	/* pcix is same as pci */
92	struct {
93	__u64 reserved;
94	} __attribute__ ((packed)) ibnd;
95	struct {
96	__u64 reserved;
97	} __attribute__ ((packed)) xprs;
98	struct {
99	__u64 reserved;
100	} __attribute__ ((packed)) htpt;
101	struct {
102	__u64 reserved;
103	} __attribute__ ((packed)) unknown;
104	} interface_path;
105	union {
106	struct {
107	__u8 device;
108	__u8 reserved1;
109	__u16 reserved2;
110	__u32 reserved3;
111	__u64 reserved4;
112	} __attribute__ ((packed)) ata;
113	struct {
114	__u8 device;
115	__u8 lun;
116	__u8 reserved1;
117	__u8 reserved2;
118	__u32 reserved3;
119	__u64 reserved4;
120	} __attribute__ ((packed)) atapi;
121	struct {
122	__u16 id;
123	__u64 lun;
124	__u16 reserved1;
125	__u32 reserved2;
126	} __attribute__ ((packed)) scsi;
127	struct {
128	__u64 serial_number;
129	__u64 reserved;
130	} __attribute__ ((packed)) usb;
131	struct {
132	__u64 eui;
133	__u64 reserved;
134	} __attribute__ ((packed)) i1394;
135	struct {
136	__u64 wwid;
137	__u64 lun;
138	} __attribute__ ((packed)) fibre;
139	struct {
140	__u64 identity_tag;
141	__u64 reserved;
142	} __attribute__ ((packed)) i2o;
143	struct {
144	__u32 array_number;
145	__u32 reserved1;
146	__u64 reserved2;
147	} __attribute__ ((packed)) raid;
148	struct {
149	__u8 device;
150	__u8 reserved1;
151	__u16 reserved2;
152	__u32 reserved3;
153	__u64 reserved4;
154	} __attribute__ ((packed)) sata;
155	struct {
156	__u64 reserved1;
157	__u64 reserved2;
158	} __attribute__ ((packed)) unknown;
159	} device_path;
160	__u8 reserved4;
161	__u8 checksum;
162	} __attribute__ ((packed));
163
164	struct edd_info {
165	__u8 device;
166	__u8 version;
167	__u16 interface_support;
168	__u16 legacy_max_cylinder;
169	__u8 legacy_max_head;
170	__u8 legacy_sectors_per_track;
171	struct edd_device_params params;
172	} __attribute__ ((packed));
173
174	struct edd {
175	unsigned int mbr_signature[EDD_MBR_SIG_MAX];
176	struct edd_info edd_info[EDDMAXNR];
177	unsigned char mbr_signature_nr;
178	unsigned char edd_info_nr;
179	};
180
181	#ifdef __KERNEL__
182	extern struct edd edd;
183	#endif /* __KERNEL__ */
184	#endif /!__ASSEMBLY__ /
185
186	#endif /* _LINUX_EDD_H */