PXA3xx Boot ROM Reference Manual - Marvell

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PXA3xx Processors and Tavor ProcessorBoot ROM Reference ManualSEQ (Sequence) – Used during data transmission in response to a data command to keep the hostand target in synchronization. The sequence number is 1 for the first data transmission, 2 for thesecond, and so on. Since the size of the sequence field is 1 byte, the sequence number rolls overafter 255 data transmissions.CID (Command ID) – Specific number that relates all of the commands (and responses) of a singleflow. A flow is the communication from the preamble to the “done” acknowledgement. The hostdefines the CID when it sends the first command after the preamble. The same CID is used until thedone command after a download or a JTAG re-enablement. If another download follows, the hostmust generate a new CID for the next download flow (after the next preamble).Status – Status code of the target in response to the last command sent by the host.Flags – Bits [7:2] reserved.• Bit 0 – Message Flag. Tells the host that the target wants to send a message. The nextcommand the host should send is a message command. The target lowers this flag when nomessages remain in the queue.• 1: message waiting to be sent• 0: no messages• Bit 1 – Message Type. This flag is applicable only when sent in a message response packet (theresponse packet CMD is 0x2B). This flag tells the target whether data in the data field is anASCII string or an integer value representing an error code.• 1: integer error code• 0: ASCII stringFor additional information about messaging, see Section 11.6, “Messages”.LEN (Data Length in Bytes) – Size of the data field of the current response. It is the total length (inbytes) of the data in the data field only. The maximum value of LEN is 255 bytes.Data – Data field associated with the current response. The number of bytes of this field must equalthe LEN value above. If LEN is zero, then this field does not exist. On a word (32-bit) basis, this datais in little endian format. The maximum size of the data field is 255 bytes.11.5 ResponsesEvery command sent by the host requires the target to respond with a status packet. Some of theresponses require data in the data field while others do not. Table 43 describes the contents of thedata field for each response packet.Table 43: Target ResponsesCommands CMD LEN DataPublic Key 0x24 0 No data neededPassword 0x28 8 A 64-bit passwordSigned Password 0x25 0 No data neededGet Version 0x20 12 The version information. First 4 bytes areASCII characters and represent the targetstepping version. The second 4 bytes is aninteger capturing the date. The last 4 bytesare ASCII characters and represent the typeof processor.Select Image 0x26 4 Image IdentifierVerify Image 0x27 0 No data needed12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758Doc. No. MV-S301208-00 Rev. - PUBLIC RELEASE Copyright © 2010 MarvellPage 100
Communication ProtocolMessagesTable 43: Target Responses (Continued)Commands CMD LEN Data11.6 MessagesData Header 0x2a 4 A 32-bit integer that tells the host how muchdata to send in the next Data commandData 0x22 0 No data neededMessage 0x2b x ASCII string. This is a message that thetarget wants printed for the user.Done 0x30 0 No data neededDisconnect 0x31 0 No data neededAt any time during the communication process, the target may send a text message to the host bythe target raising Bit 0 of the flag field. The host should then send the message command as thefollowing command.NoteNote11.7 DisconnectThe host is not required to send the message command as soon as the message flaghas been raised. The target keeps the message in the queue and message flag bitraised until the message command is sent and the message is handled.After the target has finished downloading all of the images, the host issues the disconnectcommand. The target does not respond to the command until it has finished its operations, whichallows the target to fill up the message queue with any messages needed to be sent to users.Once the target issues the response packet to the disconnect command, the host must check themessage flag. If the flag is not set, the host shuts down and the target transfers control. However, ifthe flag is set, the host must continue issuing message commands until the message flag is lowered.The host should ignore the status field during this sequence.11.8 Status CodesTable 44 describes the current status codes communicated back to the host application.Table 44: Status CodesError Code0x000x010x02DescriptionACKNACKSequence error12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758Copyright © 2010 Marvell PUBLIC RELEASE Doc. No. MV-S301208-00 Rev. -Page 101
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CoverMarvell® PXA3xx Processors an
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Table of Contents1 Boot ROM Functio
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6.3.5 USB Vendor Request Package ..
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Figure 1:PXA3xx Top Level Boot ROM
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Table 42: Host Commands ...........
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1 Boot ROM Functional Overview1.1 G
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Figure 1:PXA3xx Top Level Boot ROM
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Boot ROM Differences2 Boot ROM Diff
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Boot ROM DifferencesTIM/NTIM/OBM Su
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Boot ROM DifferencesPXA31x and Tavo
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Boot ROM DifferencesPXA31x and Tavo
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3 Software RequirementsThis chapter
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Typedef struct S_Reloc{USHORT Heade
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4 Methods for Platform Provisioning
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4. If the same OEM boot module is u
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multiple versions of the Device Key
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PXA3xx Processor and Tavor Processo
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PXA3xx Boot ROM Reference Manual - Marvell

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