vxworks bsp和启动过程.htm

Drew对于BSP的相关配置的一些经验和总结。压缩文件里包含了3个HTML文件:BSP配置文件及生成下载、VxWorks BSP和启动过程、PCI设备(网卡)初始化代码分析。希望对大家有所帮助。

      </blockquote> 
      <p style="line-height: 150%"><strong><big>romInit.s</big></strong></p> 
      <blockquote> 
        <p style="line-height: 150%">汇编语言文件,是VxWorks Boot ROM和ROM based image的入口,参见   
        <a href="http://drew.nease.net/mypage/sourcecode.htm#INIT" target="_blank">系统启动部分</a></p>  
      </blockquote>  
      <p style="line-height: 150%"><strong><big>sysALib.s</big></strong></p>  
      <blockquote>  
        <p style="line-height: 150%">汇编语言文件,程序员可以把自己的汇编函数放在这个文件里,在上层调用.VxWorks     
        image的入口点_sysInit在这个文件里,是在RAM中执行的第一个函数.</p>   
      </blockquote>   
      <p style="line-height: 150%"><strong><big>sysLib.c</big></strong></p>   
      <blockquote>   
        <p style="line-height: 150%"><big>包含一些系统相关的函数例程,提供了一个board-level的接口,VxWorks和应用程序可以以system-indepent的方式生成.这个文件还能包含目录target/config/comps/src的驱动.</big></p>   
      </blockquote>   
      <p style="line-height: 150%"><strong><big>sysScsi.c</big></strong></p>   
      <blockquote>   
        <p style="line-height: 150%">可选文件用于Scsi设备设置和初始化.</p>   
      </blockquote>   
      <p style="line-height: 150%"><strong><big>sysSerial.c</big></strong></p>   
      <blockquote>   
        <p style="line-height: 150%">可选文件用于所有的串口设置和初始化.</p>   
      </blockquote>   
      <p style="line-height: 150%"><strong><big>bootrom.hex</big></strong></p>   
      <blockquote>   
        <p style="line-height: 150%"><big>ASIC文件包含VxWorks Boot ROM代码</big></p>    
      </blockquote>   
      <p style="line-height: 150%"><strong><big>VxWorks</big></strong></p>   
      <blockquote>   
        <p style="line-height: 150%">运行在目标机上,完整的,连结后的VxWorks二进制文件.</p>   
      </blockquote>   
      <p style="line-height: 150%"><strong><big>VxWorks.sym</big></strong></p>   
      <blockquote>   
        <p style="line-height: 150%">完全的,连结后带有符号表的VxWorks二进制文件</p>   
      </blockquote>   
      <p style="line-height: 150%"><strong><big>VxWorks.st</big></strong></p>   
      <blockquote>   
        <p style="line-height: 150%">完全的,连结后,standalone,带有符号表的VxWorks二进制文件</p>   
        <p style="line-height: 150%">　</p>   
      </blockquote>   
    </blockquote>   
  </blockquote>   
  <ul>   
    <li> 
      <p style="line-height: 150%"><font face="宋体" lang="ZH-CN" size="3"><strong>BSP用&quot;make&quot;来编译连接生成(Created),而不是用Tornado的工具.</strong></font></li>  
    <li>
      <p style="line-height: 150%"><font face="宋体" lang="ZH-CN" size="3"><strong>BSP和应用程序都可以在&quot;make&quot;或&quot;tornade&quot;上开发(developed)</strong></font></li>  
  </ul>  
  <ul>  
    <li>
      <p style="line-height: 150%"><font face="宋体" lang="ZH-CN" size="3"><strong>BSP被设置包括以下驱动:</strong></font></li>  
  </ul>  
  <blockquote>  
    <blockquote>  
      <p style="line-height: 150%"><font face="宋体" lang="ZH-CN" size="3">中断控制interrupt controller,计时器timer(sys/aux),串口UART(serial),显示屏LCD,键盘Keyboard(opt),触摸屏touch-screen(opt).</font></p>    
      <p style="line-height: 150%"><font face="宋体" lang="ZH-CN" size="3">前面三个是BSP的主要部分. </font></p>   
    </blockquote>   
  </blockquote>   
  <ul>   
    <li> 
      <p style="line-height: 150%"><font face="宋体" lang="ZH-CN" size="3"><strong>BSP默认的download VxWorks RAM image方式是从ethernet.</strong></font></li>    
  </ul>   
  <ul>   
    <li> 
      <p style="line-height: 150%"><font face="宋体" lang="ZH-CN" size="3"><strong>串口电缆需要用来和开发板(COM1)通信,通过协议WDB.</strong></font></li>  
  </ul>  
</blockquote>  
  
<p style="line-height: 150%"><font face="宋体" lang="ZH-CN" size="4"><strong>&nbsp;&nbsp;&nbsp; VxWorks Image的种类:</strong></font></p>    
   
<blockquote>   
  <blockquote>   
    <blockquote>   
      <ul>   
        <li> 
          <p style="line-height: 150%"><font face="宋体" lang="ZH-CN" size="5"><small><small>Loadable images.</small></small></font></li>  
        <li>
          <p style="line-height: 150%"><font face="System" lang="ZH-CN">ROM</font><font face="宋体" lang="ZH-CN">-based   
          images---compressed/uncompressed.</font></li>  
        <li>
          <p style="line-height: 150%"><font face="System" lang="ZH-CN">ROM</font><font lang="ZH-CN"><strong>-</strong>Resident    
          images.</font></li>  
      </ul>  
      <blockquote>
          <p style="line-height: 150%"><b>ROM-resident</b> image 对一些系统内存RAM资源较少的情况下，为了节省资源，只拷贝image中的数据部分(data segment)到内存RAM,留下程序部分(text segment)在ROM中执行。这样空出更多的RAM空间给应用程序。<br> 
          并不是所用得板子都支持这种VxWorks image. 
      </blockquote>
    </blockquote>  
  </blockquote>  
</blockquote>  
  
<blockquote>  
  <ul>  
    <li>
      <p style="line-height: 150%"><font lang="ZH-CN" face="宋体" size="4"><strong>VxWorks boot images---</strong>A   
      VxWorks image designed to load another VxWorks images containing application code (often   
      refer to as &quot;boot code&quot;)</font></li>  
  </ul>  
  <blockquote>  
    <ul>  
      <li>
        <p style="line-height: 150%"><font face="宋体" lang="ZH-CN" size="5"><small><small>&quot;Burned&quot; into ROM or   
        loaded into Flash.</small></small></font></li>  
      <li>
        <p style="line-height: 150%"><font face="宋体" lang="ZH-CN">Maybe execute in ROM/Flash (ROM-resident).</font></li>  
      <li>
        <p style="line-height: 150%"><font lang="ZH-CN">Maybe execute out of RAM.</font><font face="宋体" lang="ZH-CN"> </font></li>  
    </ul>  
  </blockquote>  
  <ul>  
    <li>
      <p style="line-height: 150%"><font lang="ZH-CN" face="宋体" size="4"><strong>VxWorks images---</strong>A VxWorks   
      image containing &quot;end-user&quot; code,Sub-types:</font></li>  
  </ul>  
  <blockquote>  
    <ul>  
      <li>
        <p style="line-height: 150%"><font face="宋体" lang="ZH-CN" size="5"><small><small>Loadable VxWorks image--VxWorks    
        images loaded by VxWorks boot image.</small></small></font></li>   
    </ul>  
    <blockquote>
      <blockquote>
        <p style="line-height: 150%">Loadable VxWorks image是通过VxWorks boot image装载的VxWorks images.&nbsp;
      </blockquote>
    </blockquote>
    <ul>  
      <li>
        <p style="line-height: 150%"><font face="宋体" lang="ZH-CN">VxWorks ROM image--VxWorks image &quot;burned&quot;   
        into ROM or loaded into Flash.May execute in Flash.</font></li>  
    </ul>  
    <p style="line-height: 150%"><big><strong>VxWorks images consist of:</strong></big><ul>  
      <li>
        <p style="line-height: 150%"><small><font face="宋体" lang="ZH-CN" size="5"><small>Text segment---executable   
        instruction.</small></font></small></li>  
      <li>
        <p style="line-height: 150%"><font face="宋体" lang="ZH-CN">Data segment---Initilized global and static varibles.</font></li>  
      <li>
        <p style="line-height: 150%"><font lang="ZH-CN">BSS.</font><font face="宋体" lang="ZH-CN"> </font></li>  
    </ul>  
  </blockquote>  
</blockquote>  
  
<blockquote>  
  <p style="line-height: 150%"><b>VxWorks Image文件类型的说明</b></p>   
  <blockquote>  
  <p style="line-height: 150%"><b>Uploaded images（通过网口或串口下载到RAM）:</b></p>   
    <p style="line-height: 150%">vxWorks               - basic Tornado, shell 和 symbol table    
    在主机端&nbsp;<br>  
    vxWorks.st（文件很大）- 独立的 image,包含shell和 symbol table在目标板运行<br>   
    <br>  
    <b>ROM based images(直接烧入ROM的VxWorks):</b></p>   
    <p style="line-height: 150%">vxWorks_rom           - Tornado in ROM,非压缩, 在 RAM 中运行<br>   
    vxWorks.res_rom_nosym - Tornado in ROM, 非压缩,在 ROM 中运行<br>   
    vxWorks.st_rom        - Stand-alone in ROM, 压缩, RAM 中运行<br>   
    vxWorks.res_rom       - Stand-alone in ROM, 非压缩, ROM 中运行</p>   
  </blockquote>  
  <p style="line-height: 150%">　</p>  
  <p style="line-height: 150%"><strong>非BSP make文件中包括:</strong></p>    
  <p style="line-height: 150%"><big><strong>&nbsp;&nbsp; </strong>include $(TGT_DIR)/h/make/rules.library</big></p>    
  <blockquote>   
    <p style="line-height: 150%"><big>include $(TGT_DIR)/h/make/defs.default(define default value for makefile)</big></p>   
    <p style="line-height: 150%"><big>...............</big></p>   
  </blockquote>   
  <p style="line-height: 150%"><strong>BSP make文件中包括: </strong>include $(TGT_DIR)/h/make/rules.bsp ...</p>    
  <p style="line-height: 150%">ARM7 做VxWorks imgage 时,在makefile 文件中用 MACH_EXTRA 代替 LIB_EXTRA,     
  这样生成的VxWorks时不压缩的在ROM中运行的程序(uncompressed ROM-based     
  VxWorks image),否则就是压缩的在RAM中运行的程序(compressed RAM-based VxWorks     
  image).</p>   
  <p style="line-height: 150%">　</p>
  <p style="line-height: 150%"><big><strong>启动顺序的一些概念</strong></big><ul>
    <li>
      <p style="line-height: 150%"><font lang="ZH-CN" face="宋体" size="4">The sequence of events which occur as power-up     
      are a function of type VxWorks image with will run.</font></li>    
    <li> 
      <p style="line-height: 150%">处理器&quot;跳&quot;到再ROM或Flash中Boot-strap 程序的起点.     
      这个程序主要有以下作用:</li>   
  </ul>   
  <blockquote>   
    <ul>   
      <li> 
        <p style="line-height: 150%">关闭中断(来自处理器)</li>  
      <li>
        <p style="line-height: 150%">初始化目标内存(target memory)</li>    
      <li> 
        <p style="line-height: 150%">装载要运行的VxWorks image segments</li>    
      <li> 
        <p style="line-height: 150%">Jumps to code to place target in quiet state</li>   
    </ul>   
  </blockquote>   
</blockquote>   
   
<blockquote>   
  <ul>   
    <li> 
      <p style="line-height: 150%"><font lang="ZH-CN" face="宋体" size="4"><strong>启动顺序 Boot Sequence--Loadable     
      VxWorks image</strong></font></li>    
  </ul>   
  <blockquote>   
    <ul>   
      <li> 
        <p style="line-height: 150%"><font lang="ZH-CN" face="宋体" size="4">Bootstrap code executes and loads text and     
        data segments of boot code(from ROM or Flash) into RAM.具体执行如下:</font></li>    
    </ul>   
    <blockquote>   
      <ul>   
        <li> 
          <p style="line-height: 150%"><font lang="ZH-CN" face="宋体" size="4">Boot code compressed-Decompression during copy</font></li>  
        <li>
          <p style="line-height: 150%"><font lang="ZH-CN" face="宋体" size="4">Boot code uncompressed-copy</font></li>  
        <li>
          <p style="line-height: 150%"><font lang="ZH-CN" face="宋体" size="4">Boot code is ROM-resident-copy data segment   
          only</font></li>  
      </ul>  
    </blockquote>  
    <ul>  
      <li>
        <p style="line-height: 150%"><font lang="ZH-CN" face="宋体" size="4">Boot program executes and loads VxWorks image   
        into RAM.<u>Jumps to VxWorks load point</u>.</font></li>  
      <li>
        <p style="line-height: 150%"><font lang="ZH-CN" face="宋体" size="4">System initialization code statically linked   
        into loaded VxWorks image executes and completes initialization.</font></li>  
    </ul>  
  </blockquote>  
  <ul>  
    <li>
      <p style="line-height: 150%"><font lang="ZH-CN" face="宋体" size="4"><strong>Startup Sequence--VxWorks 初始化</strong></font></li>    
  </ul>   
  <blockquote>   
    <p style="line-height: 150%"><font lang="ZH-CN" face="宋体" size="4"><strong>做以下工作:</strong></font><ul>   
      <li> 
        <p style="line-height: 150%"><font lang="ZH-CN" face="宋体" size="4">Place hardware environment in a quiet state.</font></li>  
      <li>
        <p style="line-height: 150%"><font lang="ZH-CN" face="宋体" size="4">Initalize and start the wind kernel</font></li>  
      <li>
        <p style="line-height: 150%"><font lang="ZH-CN" face="宋体" size="4">Spawn a tast to complete system initialization</font></li>  
    </ul>  
  </blockquote>  
  <ul>  
    <li>