payloads/seabios: Add support for Hudson UART

Since version 9332965 "serialio: Support for mmap serial ports", SeaBIOS
supports memory mapped serial ports. This patch automatically configures
SeaBIOS when the Hudson UART is enabled.

Change-Id: I072f6a957df7e143d790783546b0725bcd597d9c
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Reviewed-on: https://review.coreboot.org/18025
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/payloads/external/Makefile.inc b/payloads/external/Makefile.inc
index 921c840..6bc1651 100644
--- a/payloads/external/Makefile.inc
+++ b/payloads/external/Makefile.inc
@@ -85,6 +85,8 @@
 			CONFIG_SEABIOS_THREAD_OPTIONROMS=$(CONFIG_SEABIOS_THREAD_OPTIONROMS) \
 			CONFIG_SEABIOS_VGA_COREBOOT=$(CONFIG_SEABIOS_VGA_COREBOOT) \
 			CONFIG_DRIVERS_UART_8250IO=$(CONFIG_DRIVERS_UART_8250IO) \
+			CONFIG_DRIVERS_UART_8250MEM=$(CONFIG_DRIVERS_UART_8250MEM) \
+			CONFIG_HUDSON_UART=$(CONFIG_HUDSON_UART) \
 			CONFIG_CONSOLE_SERIAL=$(CONFIG_CONSOLE_SERIAL) \
 			CONFIG_TTYS0_BASE=$(CONFIG_TTYS0_BASE) \
 			CONFIG_SEABIOS_DEBUG_LEVEL=$(CONFIG_SEABIOS_DEBUG_LEVEL)
diff --git a/payloads/external/SeaBIOS/Makefile b/payloads/external/SeaBIOS/Makefile
index 98e4b1b..78e4b4d 100644
--- a/payloads/external/SeaBIOS/Makefile
+++ b/payloads/external/SeaBIOS/Makefile
@@ -42,6 +42,9 @@
 ifeq ($(CONFIG_CONSOLE_SERIAL)$(CONFIG_DRIVERS_UART_8250IO),yy)
 	echo "CONFIG_DEBUG_SERIAL=y" >> seabios/.config
 	echo "CONFIG_DEBUG_SERIAL_PORT=$(CONFIG_TTYS0_BASE)" >> seabios/.config
+else ifeq ($(CONFIG_CONSOLE_SERIAL)$(CONFIG_DRIVERS_UART_8250MEM)$(CONFIG_HUDSON_UART),yyy)
+	echo "CONFIG_DEBUG_SERIAL_MMIO=y" >> seabios/.config
+	echo "CONFIG_DEBUG_SERIAL_MEM_ADDRESS=0xFEDC6000" >> seabios/.config
 else
 	echo "# CONFIG_DEBUG_SERIAL is not set" >> seabios/.config
 endif