c-booting2.html

vxWorks网络协议驱动开发用户手册写协议栈时的好指引

<div class="CellBody"><a name="86242"> </a><b class="symbol_lc">0x04 </b></div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86244"> </a>Prevents autoboot.</div>

</td>
<td width="10">&nbsp;</td>


</tr>
<tr valign="top">
<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86246"> </a></div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86248"> </a><b class="symbol_lc">0x08</b> </div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86250"> </a>Enables quick autoboot (no countdown).</div>

</td>
<td width="10">&nbsp;</td>


</tr>
<tr valign="top">
<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86252"> </a></div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86254"> </a><b class="symbol_lc">0x20</b> </div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86256"> </a>Disables login security.</div>

</td>
<td width="10">&nbsp;</td>


</tr>
<tr valign="top">
<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86258"> </a></div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86260"> </a><b class="symbol_lc">0x40</b> </div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86262"> </a>Specifies automatic configuration using BOOTP or DHCP. VxWorks tries first to use a DHCP client. If the boot ROM does not include the DHCP client, then the target uses the BOOTP client to retrieve information. </div>

</td>
<td width="10">&nbsp;</td>


</tr>
<tr valign="top">
<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86264"> </a></div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86266"> </a><b class="symbol_lc">0x80</b> </div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86268"> </a>Tells the target to use TFTP to get VxWorks image. Otherwise, the target uses either RSH or FTP. The target uses FTP if you enter a non-empty value for the <b class="symbol_lc">passwd</b> parameter. Otherwise, the target uses RSH. </div>

</td>
<td width="10">&nbsp;</td>


</tr>
<tr valign="top">
<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86270"> </a></div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86272"> </a><b class="symbol_lc">0x100 </b></div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86275"> </a>Makes target<b class="symbol_lc"> </b>register as a Proxy ARP client. </div>

</td>
<td width="10">&nbsp;</td>


</tr>

<tr>
<td colspan="20">
<hr class="tablerule">
</td>
</tr>
<tr valign="middle">
<td colspan="20">

</td>
</tr>
</table>
</p>
</p>
</dl>

</dl>

<font face="Helvetica, sans-serif" class="sans">
<h4 class="H3"><i><a name="86107">13.2.4  &nbsp;&nbsp;Boot Parameters Returned from DHCP or BOOTP</a></i></h4>
</font>
<dl class="margin">

<dl class="margin">

<dd><p class="Body"><a name="84516"> </a>If the 0x40 bit in the <b class="symbol_lc">flags</b> parameter is set, the boot program uses either DHCP or BOOTP client to retrieve the following parameters: <b>(&nbsp;)</b> (from which the boot program also derives a value for <b class="symbol_lc">bad</b>), <b class="symbol_lc">had</b>, <b class="symbol_lc">gad</b>, and <b class="symbol_lc">bootFile</b>.<sup><a href="#foot"><b class="FootnoteMarker">4</b></a></sup>
 See <a href="c-booting2.html#86119">Table&nbsp;13-2</a>. <p class="table">
<h4 class="EntityTitle"><a name="86119"><font face="Helvetica, sans-serif" size="-1" class="sans">Table 13-2:&nbsp;&nbsp;Boot Parameters Returned from DHCP or BOOTP </font></a></h4>

<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td colspan="20">
<hr class="tablerule">
</td>
</tr>
<tr valign="middle">
<th rowspan="1" colspan="1">
<div class="CellHeading"><b><a name="86123"> </a><font face="Helvetica, sans-serif" size="-1" class="sans">Parameter Name from <br>
<b class="symbol_UC">BOOT_PARAMS</b></font></b></div>

</th>
<td width="10">&nbsp;</td>

<th rowspan="1" colspan="1">
<div class="CellHeading"><b><a name="86125"> </a><font face="Helvetica, sans-serif" size="-1" class="sans">Parameter Name from <b class="command">p</b> Command Listing <br>
(followed by description)</font></b></div>

</th>
<td width="10">&nbsp;</td>


</tr>
<tr>
<td colspan="20">
<hr class="tablerule2">
</td>
</tr>
<tr valign="top">
<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86128"> </a><b class="symbol_lc">ead</b></div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86509"> </a><b class="symbol_lc">inet on ethernet (e) </b></div>
<div class="CellBody"><a name="86132"> </a>This value is the Internet address of this target on the Ethernet or, if you are booting from SLIP, the local end of a SLIP connection. You can also specify a subnet mask (as described in <a href="c-network.html#"><i class="title">Subnet Configuration</i></a>). If <b class="symbol_lc">ead</b> is empty, the target does not attach the Ethernet interface. This is acceptable if the target is booting over the backplane. </div>

</td>
<td width="10">&nbsp;</td>


</tr>
<tr valign="top">
<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86138"> </a><b class="symbol_lc">bad</b></div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86140"> </a><b class="symbol_lc">inet on backplane (b)</b></div>
<div class="CellBody"><a name="86142"> </a>Actually, neither BOOTP nor DHCP supply this value directly, the backplane Internet address. If this parameter contains a non-empty value, the target attaches the backplane interface. Typically, the boot program uses sequential and proxy default addressing conventions to derive a <b class="symbol_lc">bad</b> value from the <b class="symbol_lc">ead</b> parameter (which BOOTP can provide) and the CPU number. However, the use of sequential addressing makes booting from the shared-memory backplane incompatible with DHCP. This parameter should be empty if no shared-memory network is required. To specify a subnet mask for <b class="symbol_lc">bad</b>, see <a href="c-network.html#"><i class="title">Subnet Configuration</i></a>).</div>

</td>
<td width="10">&nbsp;</td>


</tr>
<tr valign="top">
<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86148"> </a><b class="symbol_lc">had</b></div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86150"> </a><b class="symbol_lc">host inet (h)</b></div>
<div class="CellBody"><a name="86152"> </a>The Internet address of the host from which to retrieve the boot file. </div>

</td>
<td width="10">&nbsp;</td>


</tr>
<tr valign="top">
<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86155"> </a><b class="symbol_lc">gad</b></div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86157"> </a><b class="symbol_lc">gateway inet (g)</b></div>
<div class="CellBody"><a name="86158"> </a>The Internet address of the gateway through which to boot if the host is not on the same network as the target. If <b class="symbol_lc">gad</b> has a non-empty value, a routing entry is added indicating that the address is a gateway to the network of the specified boot host. </div>

</td>
<td width="10">&nbsp;</td>


</tr>
<tr valign="top">
<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86161"> </a><b class="symbol_lc">bootFile</b></div>

</td>
<td width="10">&nbsp;</td>

<td colspan=1 rowspan=1>
<div class="CellBody"><a name="86163"> </a><b class="symbol_lc">file name</b></div>
<div class="CellBody"><a name="86164"> </a>The full path name of the file containing the VxWorks run-time image.</div>

</td>
<td width="10">&nbsp;</td>


</tr>

<tr>
<td colspan="20">