diff options
| author | Lee Leahy <leroy.p.leahy@intel.com> | 2016-02-04 11:21:33 -0800 |
|---|---|---|
| committer | Leroy P Leahy <leroy.p.leahy@intel.com> | 2016-02-05 22:57:03 +0100 |
| commit | 66decf16446eeb8d3b2da93d0b0086a583bc17bf (patch) | |
| tree | 040939e04a81a15e7f6aa3ffee9eff0cde5792cf /Documentation/Intel/SoC | |
| parent | 7e0078b990b7b498391505fb5c492ff7ed8e54cb (diff) | |
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>
Diffstat (limited to 'Documentation/Intel/SoC')
| -rw-r--r-- | Documentation/Intel/SoC/soc.html | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/Documentation/Intel/SoC/soc.html b/Documentation/Intel/SoC/soc.html index 679e022f64..0b0615d049 100644 --- a/Documentation/Intel/SoC/soc.html +++ b/Documentation/Intel/SoC/soc.html @@ -19,6 +19,11 @@ <li><a href="#EarlyDebug">Early Debug</a></li> <li><a href="#Bootblock">Bootblock</a></li> <li><a href="#TempRamInit">TempRamInit</a></li> + <li><a href="#Romstage">Romstage</a> + <ol type="A"> + <li>Enable <a href="#SerialOutput">Serial Output"</a></li> + </ol> + </li> </ol> @@ -285,6 +290,45 @@ Use the following steps to debug the call to TempRamInit: <hr> +<h1><a name="Romstage">Romstage</a></h1> + +<h2><a name="SerialOutput">Serial Output</a></h2> +<p> + The following steps add the serial output support for romstage: +</p> +<ol> + <li>Create the romstage subdirectory</li> + <li>Add romstage/romstage.c + <ol type="A"> + <li>Program the necessary base addresses</li> + <li>Disable the TCO</li> + </ol> + </li> + <li>Add romstage/Makefile.inc + <ol type="A"> + <li>Add romstage.c to romstage</li> + </ol> + </li> + <li>Add gpio configuration support if necessary</li> + <li>Add the necessary .h files to support the build</li> + <li>Update Makefile.inc + <ol type="A"> + <li>Add the romstage subdirectory</li> + <li>Add the gpio configuration support file to romstage</li> + </ol> + </li> + <li>Set the necessary Kconfig values to enable serial output: + <ul> + <li>CONFIG_DRIVERS_UART_<driver>=y</li> + <li>CONFIG_CONSOLE_SERIAL=y</li> + <li>CONFIG_UART_FOR_CONSOLE=<port></li> + <li>CONFIG_CONSOLE_SERIAL_115200=y</li> + </ul> + </li> +</ol> + + +<hr> <p>Modified: 31 January 2016</p> </body> </html>
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