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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: * 20: * This program is free software; you can redistribute it and/or modify 21: * it under the terms of the GNU General Public License v2.0 as published by 22: * the Free Software Foundation 23: * 24: * This program is distributed in the hope that it will be useful, 25: * but WITHOUT ANY WARRANTY; without even the implied warranty of 26: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 27: * GNU General Public License for more details. 28: * 29: */ 30: #ifndef _UAPI_LINUX_EDD_H 31: #define _UAPI_LINUX_EDD_H 32: 33: #include <linux/types.h> 34: 35: #define EDDNR 0x1e9 /* addr of number of edd_info structs at EDDBUF 36: in boot_params - treat this as 1 byte */ 37: #define EDDBUF 0xd00 /* addr of edd_info structs in boot_params */ 38: #define EDDMAXNR 6 /* number of edd_info structs starting at EDDBUF */ 39: #define EDDEXTSIZE 8 /* change these if you muck with the structures */ 40: #define EDDPARMSIZE 74 41: #define CHECKEXTENSIONSPRESENT 0x41 42: #define GETDEVICEPARAMETERS 0x48 43: #define LEGACYGETDEVICEPARAMETERS 0x08 44: #define EDDMAGIC1 0x55AA 45: #define EDDMAGIC2 0xAA55 46: 47: 48: #define READ_SECTORS 0x02 /* int13 AH=0x02 is READ_SECTORS command */ 49: #define EDD_MBR_SIG_OFFSET 0x1B8 /* offset of signature in the MBR */ 50: #define EDD_MBR_SIG_BUF 0x290 /* addr in boot params */ 51: #define EDD_MBR_SIG_MAX 16 /* max number of signatures to store */ 52: #define EDD_MBR_SIG_NR_BUF 0x1ea /* addr of number of MBR signtaures at EDD_MBR_SIG_BUF 53: in boot_params - treat this as 1 byte */ 54: 55: #ifndef __ASSEMBLY__ 56: 57: #define EDD_EXT_FIXED_DISK_ACCESS (1 << 0) 58: #define EDD_EXT_DEVICE_LOCKING_AND_EJECTING (1 << 1) 59: #define EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT (1 << 2) 60: #define EDD_EXT_64BIT_EXTENSIONS (1 << 3) 61: 62: #define EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT (1 << 0) 63: #define EDD_INFO_GEOMETRY_VALID (1 << 1) 64: #define EDD_INFO_REMOVABLE (1 << 2) 65: #define EDD_INFO_WRITE_VERIFY (1 << 3) 66: #define EDD_INFO_MEDIA_CHANGE_NOTIFICATION (1 << 4) 67: #define EDD_INFO_LOCKABLE (1 << 5) 68: #define EDD_INFO_NO_MEDIA_PRESENT (1 << 6) 69: #define EDD_INFO_USE_INT13_FN50 (1 << 7) 70: 71: struct edd_device_params { 72: __u16 length; 73: __u16 info_flags; 74: __u32 num_default_cylinders; 75: __u32 num_default_heads; 76: __u32 sectors_per_track; 77: __u64 number_of_sectors; 78: __u16 bytes_per_sector; 79: __u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */ 80: __u16 key; /* = 0xBEDD */ 81: __u8 device_path_info_length; /* = 44 */ 82: __u8 reserved2; 83: __u16 reserved3; 84: __u8 host_bus_type[4]; 85: __u8 interface_type[8]; 86: union { 87: struct { 88: __u16 base_address; 89: __u16 reserved1; 90: __u32 reserved2; 91: } __attribute__ ((packed)) isa; 92: struct { 93: __u8 bus; 94: __u8 slot; 95: __u8 function; 96: __u8 channel; 97: __u32 reserved; 98: } __attribute__ ((packed)) pci; 99: /* pcix is same as pci */ 100: struct { 101: __u64 reserved; 102: } __attribute__ ((packed)) ibnd; 103: struct { 104: __u64 reserved; 105: } __attribute__ ((packed)) xprs; 106: struct { 107: __u64 reserved; 108: } __attribute__ ((packed)) htpt; 109: struct { 110: __u64 reserved; 111: } __attribute__ ((packed)) unknown; 112: } interface_path; 113: union { 114: struct { 115: __u8 device; 116: __u8 reserved1; 117: __u16 reserved2; 118: __u32 reserved3; 119: __u64 reserved4; 120: } __attribute__ ((packed)) ata; 121: struct { 122: __u8 device; 123: __u8 lun; 124: __u8 reserved1; 125: __u8 reserved2; 126: __u32 reserved3; 127: __u64 reserved4; 128: } __attribute__ ((packed)) atapi; 129: struct { 130: __u16 id; 131: __u64 lun; 132: __u16 reserved1; 133: __u32 reserved2; 134: } __attribute__ ((packed)) scsi; 135: struct { 136: __u64 serial_number; 137: __u64 reserved; 138: } __attribute__ ((packed)) usb; 139: struct { 140: __u64 eui; 141: __u64 reserved; 142: } __attribute__ ((packed)) i1394; 143: struct { 144: __u64 wwid; 145: __u64 lun; 146: } __attribute__ ((packed)) fibre; 147: struct { 148: __u64 identity_tag; 149: __u64 reserved; 150: } __attribute__ ((packed)) i2o; 151: struct { 152: __u32 array_number; 153: __u32 reserved1; 154: __u64 reserved2; 155: } __attribute__ ((packed)) raid; 156: struct { 157: __u8 device; 158: __u8 reserved1; 159: __u16 reserved2; 160: __u32 reserved3; 161: __u64 reserved4; 162: } __attribute__ ((packed)) sata; 163: struct { 164: __u64 reserved1; 165: __u64 reserved2; 166: } __attribute__ ((packed)) unknown; 167: } device_path; 168: __u8 reserved4; 169: __u8 checksum; 170: } __attribute__ ((packed)); 171: 172: struct edd_info { 173: __u8 device; 174: __u8 version; 175: __u16 interface_support; 176: __u16 legacy_max_cylinder; 177: __u8 legacy_max_head; 178: __u8 legacy_sectors_per_track; 179: struct edd_device_params params; 180: } __attribute__ ((packed)); 181: 182: struct edd { 183: unsigned int mbr_signature[EDD_MBR_SIG_MAX]; 184: struct edd_info edd_info[EDDMAXNR]; 185: unsigned char mbr_signature_nr; 186: unsigned char edd_info_nr; 187: }; 188: 189: #endif /*!__ASSEMBLY__ */ 190: 191: #endif /* _UAPI_LINUX_EDD_H */ 192: