edd.h
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上传日期:2009-04-28
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- /*
- * 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 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 */
- #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 */