edd.h 5.4 KB

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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 _LINUX_EDD_H
  31. #define _LINUX_EDD_H
  32. #include <linux/types.h>
  33. #define EDDNR 0x1e9 /* addr of number of edd_info structs at EDDBUF
  34. in boot_params - treat this as 1 byte */
  35. #define EDDBUF 0xd00 /* addr of edd_info structs in boot_params */
  36. #define EDDMAXNR 6 /* number of edd_info structs starting at EDDBUF */
  37. #define EDDEXTSIZE 8 /* change these if you muck with the structures */
  38. #define EDDPARMSIZE 74
  39. #define CHECKEXTENSIONSPRESENT 0x41
  40. #define GETDEVICEPARAMETERS 0x48
  41. #define LEGACYGETDEVICEPARAMETERS 0x08
  42. #define EDDMAGIC1 0x55AA
  43. #define EDDMAGIC2 0xAA55
  44. #define READ_SECTORS 0x02 /* int13 AH=0x02 is READ_SECTORS command */
  45. #define EDD_MBR_SIG_OFFSET 0x1B8 /* offset of signature in the MBR */
  46. #define EDD_MBR_SIG_BUF 0x290 /* addr in boot params */
  47. #define EDD_MBR_SIG_MAX 16 /* max number of signatures to store */
  48. #define EDD_MBR_SIG_NR_BUF 0x1ea /* addr of number of MBR signtaures at EDD_MBR_SIG_BUF
  49. in boot_params - treat this as 1 byte */
  50. #ifndef __ASSEMBLY__
  51. #define EDD_EXT_FIXED_DISK_ACCESS (1 << 0)
  52. #define EDD_EXT_DEVICE_LOCKING_AND_EJECTING (1 << 1)
  53. #define EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT (1 << 2)
  54. #define EDD_EXT_64BIT_EXTENSIONS (1 << 3)
  55. #define EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT (1 << 0)
  56. #define EDD_INFO_GEOMETRY_VALID (1 << 1)
  57. #define EDD_INFO_REMOVABLE (1 << 2)
  58. #define EDD_INFO_WRITE_VERIFY (1 << 3)
  59. #define EDD_INFO_MEDIA_CHANGE_NOTIFICATION (1 << 4)
  60. #define EDD_INFO_LOCKABLE (1 << 5)
  61. #define EDD_INFO_NO_MEDIA_PRESENT (1 << 6)
  62. #define EDD_INFO_USE_INT13_FN50 (1 << 7)
  63. struct edd_device_params {
  64. __u16 length;
  65. __u16 info_flags;
  66. __u32 num_default_cylinders;
  67. __u32 num_default_heads;
  68. __u32 sectors_per_track;
  69. __u64 number_of_sectors;
  70. __u16 bytes_per_sector;
  71. __u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */
  72. __u16 key; /* = 0xBEDD */
  73. __u8 device_path_info_length; /* = 44 */
  74. __u8 reserved2;
  75. __u16 reserved3;
  76. __u8 host_bus_type[4];
  77. __u8 interface_type[8];
  78. union {
  79. struct {
  80. __u16 base_address;
  81. __u16 reserved1;
  82. __u32 reserved2;
  83. } __attribute__ ((packed)) isa;
  84. struct {
  85. __u8 bus;
  86. __u8 slot;
  87. __u8 function;
  88. __u8 channel;
  89. __u32 reserved;
  90. } __attribute__ ((packed)) pci;
  91. /* pcix is same as pci */
  92. struct {
  93. __u64 reserved;
  94. } __attribute__ ((packed)) ibnd;
  95. struct {
  96. __u64 reserved;
  97. } __attribute__ ((packed)) xprs;
  98. struct {
  99. __u64 reserved;
  100. } __attribute__ ((packed)) htpt;
  101. struct {
  102. __u64 reserved;
  103. } __attribute__ ((packed)) unknown;
  104. } interface_path;
  105. union {
  106. struct {
  107. __u8 device;
  108. __u8 reserved1;
  109. __u16 reserved2;
  110. __u32 reserved3;
  111. __u64 reserved4;
  112. } __attribute__ ((packed)) ata;
  113. struct {
  114. __u8 device;
  115. __u8 lun;
  116. __u8 reserved1;
  117. __u8 reserved2;
  118. __u32 reserved3;
  119. __u64 reserved4;
  120. } __attribute__ ((packed)) atapi;
  121. struct {
  122. __u16 id;
  123. __u64 lun;
  124. __u16 reserved1;
  125. __u32 reserved2;
  126. } __attribute__ ((packed)) scsi;
  127. struct {
  128. __u64 serial_number;
  129. __u64 reserved;
  130. } __attribute__ ((packed)) usb;
  131. struct {
  132. __u64 eui;
  133. __u64 reserved;
  134. } __attribute__ ((packed)) i1394;
  135. struct {
  136. __u64 wwid;
  137. __u64 lun;
  138. } __attribute__ ((packed)) fibre;
  139. struct {
  140. __u64 identity_tag;
  141. __u64 reserved;
  142. } __attribute__ ((packed)) i2o;
  143. struct {
  144. __u32 array_number;
  145. __u32 reserved1;
  146. __u64 reserved2;
  147. } __attribute__ ((packed)) raid;
  148. struct {
  149. __u8 device;
  150. __u8 reserved1;
  151. __u16 reserved2;
  152. __u32 reserved3;
  153. __u64 reserved4;
  154. } __attribute__ ((packed)) sata;
  155. struct {
  156. __u64 reserved1;
  157. __u64 reserved2;
  158. } __attribute__ ((packed)) unknown;
  159. } device_path;
  160. __u8 reserved4;
  161. __u8 checksum;
  162. } __attribute__ ((packed));
  163. struct edd_info {
  164. __u8 device;
  165. __u8 version;
  166. __u16 interface_support;
  167. __u16 legacy_max_cylinder;
  168. __u8 legacy_max_head;
  169. __u8 legacy_sectors_per_track;
  170. struct edd_device_params params;
  171. } __attribute__ ((packed));
  172. struct edd {
  173. unsigned int mbr_signature[EDD_MBR_SIG_MAX];
  174. struct edd_info edd_info[EDDMAXNR];
  175. unsigned char mbr_signature_nr;
  176. unsigned char edd_info_nr;
  177. };
  178. #endif /*!__ASSEMBLY__ */
  179. #endif /* _LINUX_EDD_H */