BSP Developer's Guide

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VxWorks 5.5 <strong>BSP</strong> Developer’s <strong>Guide</strong> 0x806 for ARP, and so on) and then searches its protocol list to see if any have registered using this protocol type. If there is a protocol that can handle this packet, the MUX passes the packet into the stackRcvRtn( ) specified in the protocol’s muxBind( ) call. Before passing the packet to a numbered protocol (that is, a protocol that is neither a MUX_PROTO_SNARF nor a MUX_PROTO_PROMISC protocol) muxReceive( ) calls the muxPacketDataGet( ) routine and passes two mBlks into the protocol. The first mBlk contains all the link-level information. The second mBlk contains all the information that comes just after the link-level header. This partitioning of the data lets the protocol skip over the header information (it also breaks the BSD 4.3 model at the do_protocol_with_type( ) interface). The protocol then takes over processing the packet. This new method of multiplexing received packets does away with the method based on the etherInputHook( ) and etherOutputHook( ) routines. If a protocol wants to see all the undelivered packets received on an interface, it specifies its type as MUX_PROTO_PROMISC. If a protocol needs to modify data received from the network, it should copy that data first. Because other protocols might also want to see the raw data, the data should not be modified in place (that is, in the received buffer). Supporting Scatter/Gather Devices Some devices support breaking up a single network packet into separate chunks of memory. This makes it possible to pass a packet down (such as list of mbufs from a Berkeley-type TCP/IP protocol) as a chain of mBlk/clBlk/cluster constructs. Each mBlk in the chain is linked to the next mBlk using the mBlk.mBlkHdr.mNext member. The driver deals with the chain appropriately on transmission. Protocol Transmission Restart One of the features of the MUX/END API is to allow a device to tell a protocol when it has run out of resources. Protocols usually have a queue of packets that they are trying to transmit. If the device returns an END_ERR_BLOCK from a muxSend( ) call, the device is out of the resources necessary to send the data. The protocol should now stop transmitting. After the device knows that it has the resources necessary to transmit again, it can call the muxTxRestart( ) routine which in turn calls the stackTxRestartRtn( ) of each protocol attached to that 304
H Implementing a MUX-Based Network Interface Driver particular device. Your protocol should implement a restart routine so that it can take advantage of this system. Protocol Shutdown When a protocol is finished using an interface, or for some reason wants to shut itself down, it calls the muxUnbind( ) routine. This routine tells the MUX to deallocate the NET_PROTOCOL and other memory allocated specifically for the protocol. H.6.1 Protocol to MUX API This section presents the routines and data structures that the protocol uses to interact with the MUX. Most of the work is handled by the MUX routines (listed in Table H-4). Unlike the driver entry points described earlier, you do not implement the MUX routines. These routines are utilities that you can call from within your protocol. For specific information on these MUX routines, see the appropriate reference entry. However, these MUX routines do not comprise the entire MUX/protocol interface. In addition, a protocol must implement a set of standardized routines that handle things such as shutting down the protocol, restarting the protocol, passing data up to the protocol, and passing error messages up to the protocol. Table H-4 MUX Interface Routines MUX Routine muxDevLoad( ) muxDevStart( ) muxBind( ) muxSend( ) muxDataPacketGet( ) muxAddressForm( ) muxIoctl( ) muxMCastAddrAdd( ) Purpose Loads a device into the MUX. Starts a device from the MUX. Hooks a protocol to the MUX. Accepts a packet from the protocol and passes it to the device. Gets an mBlk containing packet data only. The link-level header information is omitted. Forms an address into an outgoing packet. Accesses control functions. Adds a multicast address to the list maintained for a device. H 305
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VxWorks® 5.5 BSP DEVELOPER’S GUI
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1 Overview ........................
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Contents 1 Overview ...............
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Contents 3.6.5 Cache, MMU, and DMA
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Contents Memory-Mapped Chips ......
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Contents 7.3.3 System Configuration
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Contents 9.5.4 Processing .........
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Contents F Generic Drivers ........
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Contents Stopping the Driver Withou
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1 Overview 1.1 Introduction One str
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1 Overview ■ New Drivers Many new
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1 Overview Included with Tornado (n
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1 Overview ■ ■ ■ ■ ■ ■
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1 Overview Table 1-1 Font Usage for
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2 BSP Organization 2.1 Introduction
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2 BSP Organization Files in the tar
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2 BSP Organization Files in the tar
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2 BSP Organization Version 1.0 BSPs
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2 BSP Organization SM_MEM_SIZE The
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2 BSP Organization For boards witho
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2 BSP Organization PCI_MSTR_IO_LOCA
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2 BSP Organization The entry point
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2 BSP Organization target.nr The fi
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2 BSP Organization bootrom This fil
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2 BSP Organization sysSerialHwInit(
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2 BSP Organization The Motorola M68
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2 BSP Organization Many VxWorks fac
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2 BSP Organization further board in
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2 BSP Organization can have very un
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3 Creating a New BSP 3.1 Introducti
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3 Creating a New BSP 3.2 Setting Up
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3 Creating a New BSP Makefile At a
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3 Creating a New BSP char * sysBspR
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3 Creating a New BSP ... #endif } T
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3 Creating a New BSP int dummy; ...
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3 Creating a New BSP To find the so
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3 Creating a New BSP might want to
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3 Creating a New BSP not, use the s
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3 Creating a New BSP ■ It has a V
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3 Creating a New BSP 3.6.7 SCSI VxW
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4 Hardware Guidelines 4.1 Introduct
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4 Hardware Guidelines to the start
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4 Hardware Guidelines Higher-level
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4 Hardware Guidelines Such dedicate
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4 Hardware Guidelines Especially us
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4 Hardware Guidelines selected from
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4 Hardware Guidelines Hardware Inte
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4 Hardware Guidelines The rest of t
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4 Hardware Guidelines 4.4.2 System
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4 Hardware Guidelines only deal wit
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4 Hardware Guidelines 4.4.13 Parall
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4 Hardware Guidelines 0x10000, /* 6
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4 Hardware Guidelines The following
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5 Driver Guidelines 5.1 Introductio
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5 Driver Guidelines Maintenance and
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5 Driver Guidelines word addresses.
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5 Driver Guidelines 5.4 Design Guid
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5 Driver Guidelines Per-Device Data
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5 Driver Guidelines To fix this sit
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5 Driver Guidelines block are more
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5 Driver Guidelines 5.8 Driver Use
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5 Driver Guidelines ■ ■ Memory
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5 Driver Guidelines The level of ca
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5 Driver Guidelines cache for the d
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6 Components 6.1 Introduction Torna
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6 Components 6.2 Component Descript
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6 Components ■ User Presentation.
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6 Components Folder FOLDER_ANSI { N
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6 Components in a single project. I
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6 Components The component object i
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6 Components Parameters Parameters
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6 Components In the example, the co
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6 Components (2) comps/vxWorks/arch
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6 Components Figure 6-4 Include Com
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6 Components NOTE: INIT_BEFORE only
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6 Components The _CHILDREN property
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6 Components ! CAUTION: Do not alte
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6 Components ■ Check the Project
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7 Validation Testing 7.1 Introducti
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7 Validation Testing ■ ■ The te
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7 Validation Testing 2. The script
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7 Validation Testing Figure 7-4 Typ
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7 Validation Testing NOTE: Wind Riv
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7 Validation Testing scsi Requires
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7 Validation Testing Table 7-1 Vali
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7 Validation Testing Table 7-2 Vali
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7 Validation Testing sysProcNumGet
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7 Validation Testing The log file c
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8 Writing Portable C Code This chap
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8 Writing Portable C Code attribute
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8 Writing Portable C Code 8.1.3 Sta
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8 Writing Portable C Code 8.1.5 Oth
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8 Writing Portable C Code The last
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8 Writing Portable C Code Always sp
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8 Writing Portable C Code 8.2 Tool
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9 Documentation Guidelines 9.1 Intr
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9 Documentation Guidelines Spelling
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9 Documentation Guidelines Table 9-
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9 Documentation Guidelines Table 9-
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9 Documentation Guidelines ■ Avoi
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9 Documentation Guidelines ■ ■
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9 Documentation Guidelines INCLUDE
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9 Documentation Guidelines INTRODUC
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9 Documentation Guidelines 9.5 Gene
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9 Documentation Guidelines uppercas
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9 Documentation Guidelines The foll
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10 Product Packaging 10.1 SETUP Dev
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10 Product Packaging ... include $(
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10 Product Packaging Vendor-Supplie
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10 Product Packaging in the project
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A Upgrading a BSP for Tornado 2.0 T
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A Upgrading a BSP for Tornado 2.0 A
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A Upgrading a BSP for Tornado 2.0
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A Upgrading a BSP for Tornado 2.0 6
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B Upgrading a BSP for Tornado 2.2 T
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B Upgrading a BSP for Tornado 2.2 C
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B Upgrading a BSP for Tornado 2.2 c
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B Upgrading a BSP for Tornado 2.2
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C Upgrading a BSP for the VxWorks N
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D VxWorks Boot Sequence Table D-1 d
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D VxWorks Boot Sequence Table D-1 V
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E Component Language E.1 Component
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E Component Language REQUIRES r1 r2
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E Component Language } // default i
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E Component Language FOLDER_WINDVIE
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E Component Language initialization
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E Component Language INCLUDE_MMU_BA
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E Component Language INCLUDE_NETWOR
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E Component Language INCLUDE_WDB_ME
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F Generic Drivers F.1 Introduction
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F Generic Drivers CONSOLE_TTY This
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F Generic Drivers Define SIO_CALLBA
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I Writing a SCSI-2 Device Driver I.
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J BSP Validation Test Suite Referen
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K BSP Validation Checklists This ap
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K BSP Validation Checklists BSP Val
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K BSP Validation Checklists 7. Veri
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K BSP Validation Checklists 2. If t
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K BSP Validation Checklists Validat
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K BSP Validation Checklists Manufac
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K BSP Validation Checklists Manufac
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L Refgen NOTE: In Tornado 1.0.1 and
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L Refgen * SYNOPSIS * \cs * void xx
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L Refgen Yields output approximatel
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L Refgen EXAMPLE INCLUDES SEE ALSO
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M BSP Product Contents When you are
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M BSP Product Contents Do not inclu
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Index A abort button 82 addressing
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Index clocks see also individual cl
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Index naming conventions 95 perform
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Index INCLUDE_USR_APPL 38 INCLUDE_V
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Index network drivers 58 network in
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Index scsiCtrlLib 324 scsiDirectLib
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Index testing, validation 139-158 s
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