466 lines
5.9 KiB
HTML
466 lines
5.9 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>Linux kernel version
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2.2</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="Remote Serial Console HOWTO"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Configuring a kernel to support serial console"
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HREF="kernelcompile.html"><LINK
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REL="PREVIOUS"
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TITLE="Linux kernel version 2.4"
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HREF="kernelcompile-24.html"><LINK
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REL="NEXT"
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TITLE="Serial cabling"
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HREF="serial.html"></HEAD
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>Remote Serial Console HOWTO</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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><A
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HREF="kernelcompile-24.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 10. Configuring a kernel to support serial console</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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>Next</A
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECTION"
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><H1
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CLASS="SECTION"
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><A
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NAME="KERNELCOMPILE-22"
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></A
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>10.3. <SPAN
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CLASS="SYSTEMITEM"
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>Linux</SPAN
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> kernel version
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2.2</H1
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><P
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>The later <SPAN
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CLASS="SYSTEMITEM"
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>Linux</SPAN
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> 2.2
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kernels use the same build parameters and parameter syntax as the
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<SPAN
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CLASS="SYSTEMITEM"
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>Linux</SPAN
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> version 2.4
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kernels.</P
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><P
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>For earlier kernels see the <A
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HREF="http://www.linuxjournal.com/article.php?sid=2040"
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TARGET="_top"
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>article</A
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>
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by Francesco Conti in issue 36 of <A
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HREF="http://www.linuxjournal.com/"
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TARGET="_top"
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><I
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CLASS="CITETITLE"
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>Linux
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Journal</I
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></A
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> published in April 1997.</P
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><P
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>This article included some patches for the kernel, which have
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been extended in the notes below to use a broader range of serial
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port speeds.</P
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><P
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>Choose to use the serial console by adding a couple of
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<TT
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CLASS="LITERAL"
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>#defines</TT
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> at the start of
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<TT
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CLASS="FILENAME"
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>/usr/src/linux/drivers/char/console.c</TT
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>:</P
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><DIV
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CLASS="INFORMALFIGURE"
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><A
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NAME="AEN2599"
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></A
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><P
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></P
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><TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><FONT
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COLOR="#000000"
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><PRE
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CLASS="PROGRAMLISTING"
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>#define CONFIG_SERIAL_ECHO
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#define SERIAL_ECHO_PORT 0x3f8 /* COM1 port address */</PRE
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></FONT
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></TD
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></TR
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></TABLE
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><P
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></P
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></DIV
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><P
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>Alternatively, to use <TT
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CLASS="LITERAL"
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>ttyS1</TT
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> use these
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lines:</P
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><DIV
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CLASS="INFORMALFIGURE"
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><A
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NAME="AEN2603"
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></A
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><P
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></P
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><TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><FONT
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COLOR="#000000"
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><PRE
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CLASS="PROGRAMLISTING"
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>#define CONFIG_SERIAL_ECHO
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#define SERIAL_ECHO_PORT 0x2f8 /* COM2 port address */</PRE
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></FONT
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></TD
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></TR
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></TABLE
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><P
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></P
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></DIV
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><P
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>The kernel assumes a serial link speed of
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9600<SPAN
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CLASS="ABBREV"
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>bps</SPAN
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>. If you are using a differing bit rate
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then find these two lines:</P
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><DIV
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CLASS="INFORMALFIGURE"
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><A
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NAME="AEN2607"
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></A
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><P
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></P
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><TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><FONT
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COLOR="#000000"
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><PRE
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CLASS="PROGRAMLISTING"
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>serial_echo_outb(0x00, UART_DLM); /* 9600 baud */
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serial_echo_outb(0x0c, UART_DLL);</PRE
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></FONT
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></TD
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></TR
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></TABLE
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><P
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></P
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></DIV
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><P
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>and change <TT
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CLASS="LITERAL"
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>0x0c</TT
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> to one of the values in
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<A
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HREF="kernelcompile-22.html#KERNELCOMPILE-22-DIVISORS"
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>Table 10-1</A
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>.</P
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><DIV
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CLASS="TABLE"
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><A
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NAME="KERNELCOMPILE-22-DIVISORS"
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></A
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><P
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><B
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>Table 10-1. <SPAN
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CLASS="ACRONYM"
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>IBM-PC/AT</SPAN
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> serial port bit rates and
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their bit-clock divisors</B
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></P
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><TABLE
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BORDER="1"
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CLASS="CALSTABLE"
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><THEAD
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><TR
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><TH
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="BOTTOM"
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>Bit Rate</TH
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><TH
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="BOTTOM"
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>Divisor</TH
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></TR
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></THEAD
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><TBODY
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><TR
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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>115200<SPAN
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CLASS="ABBREV"
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>bps</SPAN
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></TD
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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><TT
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CLASS="LITERAL"
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>0x01</TT
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></TD
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></TR
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><TR
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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>57600<SPAN
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CLASS="ABBREV"
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>bps</SPAN
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></TD
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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><TT
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CLASS="LITERAL"
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>0x02</TT
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></TD
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></TR
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><TR
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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>38400<SPAN
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CLASS="ABBREV"
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>bps</SPAN
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></TD
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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><TT
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CLASS="LITERAL"
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>0x03</TT
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></TD
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></TR
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><TR
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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>19200<SPAN
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CLASS="ABBREV"
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>bps</SPAN
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></TD
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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><TT
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CLASS="LITERAL"
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>0x06</TT
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></TD
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></TR
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><TR
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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>9600<SPAN
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CLASS="ABBREV"
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>bps</SPAN
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></TD
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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><TT
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CLASS="LITERAL"
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>0x0c</TT
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></TD
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></TR
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><TR
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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>4800<SPAN
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CLASS="ABBREV"
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>bps</SPAN
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></TD
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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><TT
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CLASS="LITERAL"
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>0x18</TT
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></TD
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></TR
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><TR
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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>2400<SPAN
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CLASS="ABBREV"
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>bps</SPAN
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></TD
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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><TT
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CLASS="LITERAL"
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>0x30</TT
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></TD
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></TR
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><TR
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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>1200<SPAN
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CLASS="ABBREV"
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>bps</SPAN
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></TD
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><TD
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WIDTH="50%"
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ALIGN="CENTER"
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VALIGN="TOP"
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><TT
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CLASS="LITERAL"
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>0x60</TT
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></TD
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></TR
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></TBODY
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>Prev</A
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WIDTH="33%"
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>Linux kernel version 2.4</TD
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