Western Digital T13/2132-D manual Security Protocol Commands FN 51h

Page 81

June 23, 2010

T13/2132-D Revision 3

8.28 Security Protocol Commands (FN 51h)

The purpose of this function is to support the Trusted Computing feature set (see ACS-2), the SECURITY PROTOCOL IN command (see SPC-4), and the SECURITY PROTOCOL OUT command (see SPC-4).

Entry

AH 51h

AL Flags

Bit Description

7 Direction

0 = Send data to the device

1 = Receive data from the device 6:0 Reserved

CX Security Protocol Specific

Specifies data which varies based on the Security Protocol ID. (See ACS-2 or SPC-4)

DH Security Protocol ID

Specifies which security protocol is to be used. (See ACS-2 or SPC-4) DL BIOS device number

ES:BX QWord-aligned pointer to data buffer in memory (see table 33)

Exit

Carry Clear Function completed without error AH Shall be cleared to zero

AL Shall be set to the status of the last INT 13h operation

ES:BX Shall be set to the QWord-aligned pointer to data buffer in memory (see table 33)

Carry Set Function completed with an error

AH Shall be set to the error code

ES:BX Shall be set to the QWord-aligned pointer to data buffer in memory (see table 33)

Table 33 — Data Buffer for Security Protocol Commands

Offset	Type	Description
00h	DWord	Length (bytes) of the Payload Data
		On Entry:
		If the Direction bit is set to one, then this field contains the number
		of bytes to be sent to the device. If Direction bit is cleared to zero,
		then this field contains the expected number of bytes to be received
		from the device, and the buffer shall be large enough to
		accommodate this number, plus 8 bytes.
		On Exit:
		If the Direction bit is cleared to zero, this field contains the actual
		number of bytes received from the device

04h	DWord	Reserved

08h..(Length of Payload Data+8)	Byte	Payload Data
		The content of this data depends on the selected Security Protocol.

Working Draft Enhanced Disk Drive - 4 (EDD-4)

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Contents Revision June 23 Information technology Enhanced Disk Drive 4 EDD-4Points of Contact T13/2132-D Revision 3June 23Working Draft Enhanced Disk Drive 4 EDD-4 June 23 T13/2132-D Revision DraftT13/2132-D Revision June 23 American National StandardNew Capabilities added to EDD-4 Document StatusContents Working Draft Enhanced Disk Drive 4 EDD-4 Vii Viii Working Draft Enhanced Disk Drive 4 EDD-4 Output Parameters TablesFigures Introduction ForewordXii Working Draft Enhanced Disk Drive 4 EDD-4 Scope BSR IncitsAmerican National Standard for Information Technology ATA8-APT ATA8-AST Normative references General Approved referencesApproved Ansi References Name References under development Other referencesReferences Under Development Name Project Number June 23 T13/2132-D Revision Master Boot Record MBR The first LBA on a disk Symbols and abbreviationsConventions Abbreviation MeaningLists Lists overview PrecedenceUnordered lists Ordered listsNumbering T13/2132-D Revision June 23 KeywordsInterrupt Services and Functions Register and CF ContentsNumbering conventions French English This standard Bit conventionsWord at offset n ByteDWord at word offset n QWord at word offset nATA firmware revision example ATA string byte swapping Word Byte Character in stringWord Byte ValueOverview Conventional Register Definitions 8GB INT 13h Functions Conventional FunctionsRegister Description Bit DescriptionConventional Function Definitions Function a Description Data Structure 8GB INT 13h Functions OverviewExtended Function Definitions Function DescriptionT13/2132-D Revision June 23 Device Address Packet Offset Fixed Disk Access Function Code Fixed Disk Access SubsetRemovable Media INT 13h Interface SubsetsLocking and Ejecting Function Code Enhanced Disk Drive EDD Support SubsetEDD Support Function Code ISO 9660 CD Layout Working Draft Enhanced Disk Drive 4 EDD-4 CD/DVD Boot OverviewSystem Area Unused Emulation Process Boot MethodsFloppy Boot No Emulation BootHard Drive Boot Floppy Geometries Type Cylinders Heads SectorsBoot Volume Descriptor BVD Boot Volume DescriptorCD/DVD Format Offset Type Description T13/2132-D Revision June 23 Validation EntrySection Header June 23 T13/2132-D Revision Initial/Default Entry00h Byte Header ID Type Description June 23 T13/2132-D Revision Section EntryT13/2132-D Revision June 23 Section Entry Extension INT 13h Function Definitions Overview Reset Disk Subsystem FN 00h Get Status of Last Operation FN 01h Read Sectors into Memory FN 02h Write Sectors From Memory FN 03h Verify Sectors FN 04h Get Drive Parameters FN 08h Read Buffer FN 0Eh Write Buffer FN 0Fh Value Description Get Disk Type FN 15hSet Media Type FN 18h Park Heads FN 19h Identify Device Information FN 25h Interface Support Bit Map Description Check Extensions Present FN 41hExtended Read FN 42h Extended Write FN 43h Verify Sectors FN 44h Lock/Unlock Media FN 45h Eject Removable Media FN 46h Result Buffer Get Device Parameters FN 48hAscii Interface Path Definitions part 1 Host Bus Type Offset T13/2132-D Revision June 23 Interface PathDevice Path Definition00h ATA Device 01h 02h..FFh Reserved Byte Word DWord QWord Byte Port number Device parameter table extension Offset 7 READ/WRITE Multiple command block count Offset 5 Bios use only Bios use only Offset 6 IRQ numberOffset 0-1 I/O port base Offset 2-3 control port baseBit 7 32-bit transfer mode Offset 10-11 Bios selected hardware specific option flagsBit 8 Atapi device uses command packet interrupt Offset 9 PIO typeJune 23 T13/2132-D Revision Bits 9-10 translation type Bit 13h 48-bit LBA addressing enabledTranslation Type Bits Description Bit 11 Ultra DMAGet Extended Media Change Status FN 49h Initiate Disk Emulation FN 4Ah Value Emulation Working Draft Enhanced Disk Drive 4 EDD-4 Terminate Disk Emulation FN 4Bh Initiate Disk Emulation & Boot FN 4Ch CD Command Packet Return Boot Catalog FN 4DhHardware Configuration Sub-Functions Set Hardware Configuration FN 4EhFormatted Command Packet Offset Type Description Send Packet Command FN 50hFormatted Protocol Specific Data T13/2132-D Revision June 23 Output Parameters Security Protocol Commands FN 51h INT 15h Removable Media Eject Hybrid MBR boot Hybrid MBR boot overview GPT support for hybrid MBR boot codeAnnex a Hybrid MBR boot code EAX Hybrid MBR boot code endeavor procedureHybrid VBR boot code