From ce077d96cb0569a3c2587a10121d4fa1d0d1ac54 Mon Sep 17 00:00:00 2001
From: Alexander von Gluck IV <kallisti5@unixzen.com>
Date: Wed, 16 May 2012 04:50:29 -0500
Subject: [PATCH] rpi: Flush serial on cleanup

* Wait for transmit fifo to empty on serial cleanup
* Serial cleanup on platform exit
---
 src/system/boot/platform/raspberrypi_arm/serial.cpp | 4 +++-
 src/system/boot/platform/raspberrypi_arm/start.c    | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/system/boot/platform/raspberrypi_arm/serial.cpp b/src/system/boot/platform/raspberrypi_arm/serial.cpp
index ec6f6c054b..926f0b4092 100644
--- a/src/system/boot/platform/raspberrypi_arm/serial.cpp
+++ b/src/system/boot/platform/raspberrypi_arm/serial.cpp
@@ -67,7 +67,9 @@ serial_enable(void)
 extern "C" void
 serial_cleanup(void)
 {
-#warning IMPLEMENT serial_cleanup
+	// Transmit the last of our fifo
+	gLoaderUART.FlushTx();
+	gLoaderUART.Disable();
 }
 
 
diff --git a/src/system/boot/platform/raspberrypi_arm/start.c b/src/system/boot/platform/raspberrypi_arm/start.c
index bac1ceede7..366bb64354 100644
--- a/src/system/boot/platform/raspberrypi_arm/start.c
+++ b/src/system/boot/platform/raspberrypi_arm/start.c
@@ -92,7 +92,7 @@ platform_start_kernel(void)
 void
 platform_exit(void)
 {
-	#warning IMPLEMENT platform_exit
+	serial_cleanup();
 }