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Diffstat (limited to 'include/linux/edd.h')
| -rw-r--r-- | include/linux/edd.h | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/include/linux/edd.h b/include/linux/edd.h new file mode 100644 index 00000000000..c6e6747a401 --- /dev/null +++ b/include/linux/edd.h @@ -0,0 +1,194 @@ +/* + * 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 0x600 /* 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 */ + +#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 */ |