BSP Developer's Guide

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VxWorks 5.5 <strong>BSP</strong> Developer’s <strong>Guide</strong> G.1.1 Structure of a 4.3 BSD Network Driver The network drivers currently shipped with VxWorks are based on those available in BSD UNIX version 4.3. These drivers define only one global (user-callable) routine, the driver’s attach( ) routine. Typically, the name of this routine contains the word, attach, prefixed with two letters from the device name. For example, the AMD Lance driver’s attach routine is called lnattach( ). The xxattach( ) routine hooks in five function pointers that are mapped into an ifnet structure. These functions, listed in Table G-1, are all called from various places in the IP protocol stack, which has intimate knowledge of the driver. Table G-1 Network Interface Procedure Handles Function Function Pointer Driver-Specific Routine initialization if_init xxInit( ) output if_output xxOutput( ) control if_ioctl xxIoctl( ) reset if_reset xxReset( ) watchdog if_watchdog (optional) xxWatchdog( ) Packet reception begins when the driver’s interrupt routine is invoked. The interrupt routine does the least work necessary to get the packet off the local hardware, schedules an input handler to run by calling netJobAdd( ), and then returns. The tNetTask calls the function that was added to its work queue. In the case of packet reception, this the driver’s xxReceive( ) function. The xxReceive( ) function eventually sends the packet up to a protocol by calling do_protocol_with_type( ). This routine is a switch statement that figures out which protocol to hand the packet off to. This calling sequence is shown in Figure G-1. Figure G-2 shows the call graph for packet transmission. After a protocol has picked an interface on which to send a packet, it calls the xxOutput( ) routine for that interface. The output routine calls the generic ether_output( ) function, passing it a pointer to addressing information (usually an arpcom structure) as well as the data to be sent. After the data is properly packed, it is placed on the output queue (using the IF_ENQUEUE macro), and the driver’s start routine is called. The xxTxStartup( ) routine dequeues as many packets as it can and transmits them on the physical medium. 258
G Upgrading 4.3 BSD Network Drivers Figure G-1 Packet Reception Call Graph etherInputHook( ) [1] xxReceive( ) [2] do_protocol_with_type( ) xxHandleRecvInt( ) xxInt( ) [1] The xxReceive( ) first shows the packet to etherInputHook( ). [2] If etherInputHook( ) does not take delivery of the packet, xxReceive( ) hands the packet to do_protocol_with_type( ). Figure G-2 Packet Transmission Call Graph xxOutput( ) ether_output( ) xxTxStartup( ) G [1] [2] etherOutputHook( ) transmit on medium [1] The xxTxStartup( ) first shows the packet to etherOutputHook( ). [2] If etherOutputHook( ) does not take delivery of the packet, xxTxStartup( ) transmits the packet on the medium. G.1.2 Etherhook Routines Provide Access to Raw Packets You can use the etherInputHook( ) and etherOutputHook( ) routines to bypass the TCP/IP stack and thus get access to raw packets. On packet reception, if an etherInputHook( ) function is installed, it receives the packet just after the driver has completed reception but before the packet goes to the protocol. If 259
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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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Page 241 and 242: D VxWorks Boot Sequence Table D-1 d
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Page 265 and 266: F Generic Drivers F.1 Introduction
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H Implementing a MUX-Based Network
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I Writing a SCSI-2 Device Driver I.
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I Writing a SCSI-2 Device Driver A
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I Writing a SCSI-2 Device Driver *
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I Writing a SCSI-2 Device Driver ;/
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I Writing a SCSI-2 Device Driver Th
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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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