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edd.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * 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 #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; }; #endif /*!__ASSEMBLY__ */ #endif /* _LINUX_EDD_H */