Documentation: x86 Enable Serial Output

Document the steps necessary to enable serial output

TEST=None

Change-Id: Ifc0e700d7ef54fb1e28ca9bca34b94cccd3633ac
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/13444
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Lee Leahy
2016-02-04 11:21:33 -08:00
committed by Leroy P Leahy
parent 7e0078b990
commit 66decf1644
4 changed files with 111 additions and 0 deletions

View File

@@ -14,6 +14,7 @@
</p>
<ol>
<li><a href="#RequiredFiles">Required Files</a></li>
<li>Enable <a href="#SerialOutput">Serial Output</a></li>
</ol>
@@ -77,6 +78,30 @@
</ol>
<hr>
<h1><a name="SerialOutput">Enable Serial Output</a></h1>
<p>
Use the following steps to enable serial output:
</p>
<ol>
<li>Implement the car_mainboard_pre_console_init routine in the com_init.c
file:
<ol type="A">
<li>Power on and enable the UART controller</li>
<li>Connect the UART receive and transmit data lines to the
appropriate SoC pins
</li>
</ol>
</li>
<li>Add Makefile.inc
<ol type="A">
<li>Add com_init.c to romstage</li>
</ol>
</li>
</ol>
<hr>
<p>Modified: 31 January 2016</p>
</body>