edd.h 5.1 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. /*
  3. * linux/include/linux/edd.h
  4. * Copyright (C) 2002, 2003, 2004 Dell Inc.
  5. * by Matt Domsch <Matt_Domsch@dell.com>
  6. *
  7. * structures and definitions for the int 13h, ax={41,48}h
  8. * BIOS Enhanced Disk Drive Services
  9. * This is based on the T13 group document D1572 Revision 0 (August 14 2002)
  10. * available at http://www.t13.org/docs2002/d1572r0.pdf. It is
  11. * very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf
  12. *
  13. * In a nutshell, arch/{i386,x86_64}/boot/setup.S populates a scratch
  14. * table in the boot_params that contains a list of BIOS-enumerated
  15. * boot devices.
  16. * In arch/{i386,x86_64}/kernel/setup.c, this information is
  17. * transferred into the edd structure, and in drivers/firmware/edd.c, that
  18. * information is used to identify BIOS boot disk. The code in setup.S
  19. * is very sensitive to the size of these structures.
  20. */
  21. #ifndef _LINUX_EDD_H
  22. #define _LINUX_EDD_H
  23. #include <linux/types.h>
  24. #define EDDNR 0x1e9 /* addr of number of edd_info structs at EDDBUF
  25. in boot_params - treat this as 1 byte */
  26. #define EDDBUF 0xd00 /* addr of edd_info structs in boot_params */
  27. #define EDDMAXNR 6 /* number of edd_info structs starting at EDDBUF */
  28. #define EDDEXTSIZE 8 /* change these if you muck with the structures */
  29. #define EDDPARMSIZE 74
  30. #define CHECKEXTENSIONSPRESENT 0x41
  31. #define GETDEVICEPARAMETERS 0x48
  32. #define LEGACYGETDEVICEPARAMETERS 0x08
  33. #define EDDMAGIC1 0x55AA
  34. #define EDDMAGIC2 0xAA55
  35. #define READ_SECTORS 0x02 /* int13 AH=0x02 is READ_SECTORS command */
  36. #define EDD_MBR_SIG_OFFSET 0x1B8 /* offset of signature in the MBR */
  37. #define EDD_MBR_SIG_BUF 0x290 /* addr in boot params */
  38. #define EDD_MBR_SIG_MAX 16 /* max number of signatures to store */
  39. #define EDD_MBR_SIG_NR_BUF 0x1ea /* addr of number of MBR signtaures at EDD_MBR_SIG_BUF
  40. in boot_params - treat this as 1 byte */
  41. #ifndef __ASSEMBLY__
  42. #define EDD_EXT_FIXED_DISK_ACCESS (1 << 0)
  43. #define EDD_EXT_DEVICE_LOCKING_AND_EJECTING (1 << 1)
  44. #define EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT (1 << 2)
  45. #define EDD_EXT_64BIT_EXTENSIONS (1 << 3)
  46. #define EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT (1 << 0)
  47. #define EDD_INFO_GEOMETRY_VALID (1 << 1)
  48. #define EDD_INFO_REMOVABLE (1 << 2)
  49. #define EDD_INFO_WRITE_VERIFY (1 << 3)
  50. #define EDD_INFO_MEDIA_CHANGE_NOTIFICATION (1 << 4)
  51. #define EDD_INFO_LOCKABLE (1 << 5)
  52. #define EDD_INFO_NO_MEDIA_PRESENT (1 << 6)
  53. #define EDD_INFO_USE_INT13_FN50 (1 << 7)
  54. struct edd_device_params {
  55. __u16 length;
  56. __u16 info_flags;
  57. __u32 num_default_cylinders;
  58. __u32 num_default_heads;
  59. __u32 sectors_per_track;
  60. __u64 number_of_sectors;
  61. __u16 bytes_per_sector;
  62. __u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */
  63. __u16 key; /* = 0xBEDD */
  64. __u8 device_path_info_length; /* = 44 */
  65. __u8 reserved2;
  66. __u16 reserved3;
  67. __u8 host_bus_type[4];
  68. __u8 interface_type[8];
  69. union {
  70. struct {
  71. __u16 base_address;
  72. __u16 reserved1;
  73. __u32 reserved2;
  74. } __attribute__ ((packed)) isa;
  75. struct {
  76. __u8 bus;
  77. __u8 slot;
  78. __u8 function;
  79. __u8 channel;
  80. __u32 reserved;
  81. } __attribute__ ((packed)) pci;
  82. /* pcix is same as pci */
  83. struct {
  84. __u64 reserved;
  85. } __attribute__ ((packed)) ibnd;
  86. struct {
  87. __u64 reserved;
  88. } __attribute__ ((packed)) xprs;
  89. struct {
  90. __u64 reserved;
  91. } __attribute__ ((packed)) htpt;
  92. struct {
  93. __u64 reserved;
  94. } __attribute__ ((packed)) unknown;
  95. } interface_path;
  96. union {
  97. struct {
  98. __u8 device;
  99. __u8 reserved1;
  100. __u16 reserved2;
  101. __u32 reserved3;
  102. __u64 reserved4;
  103. } __attribute__ ((packed)) ata;
  104. struct {
  105. __u8 device;
  106. __u8 lun;
  107. __u8 reserved1;
  108. __u8 reserved2;
  109. __u32 reserved3;
  110. __u64 reserved4;
  111. } __attribute__ ((packed)) atapi;
  112. struct {
  113. __u16 id;
  114. __u64 lun;
  115. __u16 reserved1;
  116. __u32 reserved2;
  117. } __attribute__ ((packed)) scsi;
  118. struct {
  119. __u64 serial_number;
  120. __u64 reserved;
  121. } __attribute__ ((packed)) usb;
  122. struct {
  123. __u64 eui;
  124. __u64 reserved;
  125. } __attribute__ ((packed)) i1394;
  126. struct {
  127. __u64 wwid;
  128. __u64 lun;
  129. } __attribute__ ((packed)) fibre;
  130. struct {
  131. __u64 identity_tag;
  132. __u64 reserved;
  133. } __attribute__ ((packed)) i2o;
  134. struct {
  135. __u32 array_number;
  136. __u32 reserved1;
  137. __u64 reserved2;
  138. } __attribute__ ((packed)) raid;
  139. struct {
  140. __u8 device;
  141. __u8 reserved1;
  142. __u16 reserved2;
  143. __u32 reserved3;
  144. __u64 reserved4;
  145. } __attribute__ ((packed)) sata;
  146. struct {
  147. __u64 reserved1;
  148. __u64 reserved2;
  149. } __attribute__ ((packed)) unknown;
  150. } device_path;
  151. __u8 reserved4;
  152. __u8 checksum;
  153. } __attribute__ ((packed));
  154. struct edd_info {
  155. __u8 device;
  156. __u8 version;
  157. __u16 interface_support;
  158. __u16 legacy_max_cylinder;
  159. __u8 legacy_max_head;
  160. __u8 legacy_sectors_per_track;
  161. struct edd_device_params params;
  162. } __attribute__ ((packed));
  163. struct edd {
  164. unsigned int mbr_signature[EDD_MBR_SIG_MAX];
  165. struct edd_info edd_info[EDDMAXNR];
  166. unsigned char mbr_signature_nr;
  167. unsigned char edd_info_nr;
  168. };
  169. #ifdef __KERNEL__
  170. extern struct edd edd;
  171. #endif /* __KERNEL__ */
  172. #endif /*!__ASSEMBLY__ */
  173. #endif /* _LINUX_EDD_H */