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192 lines
5.5 KiB
192 lines
5.5 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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/* |
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* linux/include/linux/edd.h |
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* Copyright (C) 2002, 2003, 2004 Dell Inc. |
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* by Matt Domsch <[email protected]> |
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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,x86_64}/boot/setup.S populates a scratch |
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* table in the boot_params that contains a list of BIOS-enumerated |
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* boot devices. |
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* In arch/{i386,x86_64}/kernel/setup.c, this information is |
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* transferred into the edd structure, and in drivers/firmware/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 _UAPI_LINUX_EDD_H |
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#define _UAPI_LINUX_EDD_H |
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#include <linux/types.h> |
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#define EDDNR 0x1e9 /* addr of number of edd_info structs at EDDBUF |
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in boot_params - treat this as 1 byte */ |
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#define EDDBUF 0xd00 /* addr of edd_info structs in boot_params */ |
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#define EDDMAXNR 6 /* number of edd_info structs starting at EDDBUF */ |
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#define EDDEXTSIZE 8 /* 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 LEGACYGETDEVICEPARAMETERS 0x08 |
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#define EDDMAGIC1 0x55AA |
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#define EDDMAGIC2 0xAA55 |
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#define READ_SECTORS 0x02 /* int13 AH=0x02 is READ_SECTORS command */ |
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#define EDD_MBR_SIG_OFFSET 0x1B8 /* offset of signature in the MBR */ |
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#define EDD_MBR_SIG_BUF 0x290 /* addr in boot params */ |
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#define EDD_MBR_SIG_MAX 16 /* max number of signatures to store */ |
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#define EDD_MBR_SIG_NR_BUF 0x1ea /* addr of number of MBR signtaures at EDD_MBR_SIG_BUF |
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in boot_params - treat this as 1 byte */ |
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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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__u16 legacy_max_cylinder; |
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__u8 legacy_max_head; |
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__u8 legacy_sectors_per_track; |
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struct edd_device_params params; |
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} __attribute__ ((packed)); |
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struct edd { |
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unsigned int mbr_signature[EDD_MBR_SIG_MAX]; |
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struct edd_info edd_info[EDDMAXNR]; |
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unsigned char mbr_signature_nr; |
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unsigned char edd_info_nr; |
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}; |
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#endif /*!__ASSEMBLY__ */ |
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#endif /* _UAPI_LINUX_EDD_H */
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