[SPARC64]: Add SUN4V Hypervisor Console driver.

Since it can do things like BREAK and HUP, we implement
this as a serial uart driver.

This still needs interrupt probing code, as I haven't figured
out how interrupts will work or be probed for on SUN4V yet.
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/serial/Kconfig

@@ -582,6 +582,13 @@ config SERIAL_SUNSAB_CONSOLE
 	  on your Sparc system as the console, you can do so by answering
 	  Y to this option.
 
+config SERIAL_SUNHV
+	bool "Sun4v Hypervisor Console support"
+	depends on SPARC64
+	help
+	  This driver supports the console device found on SUN4V Sparc
+	  systems.  Say Y if you want to be able to use this device.
+
 config SERIAL_IP22_ZILOG
 	tristate "IP22 Zilog8530 serial support"
 	depends on SGI_IP22

drivers/serial/Makefile

@@ -34,6 +34,7 @@ obj-$(CONFIG_SERIAL_SUNZILOG) += sunzilog.o
 obj-$(CONFIG_SERIAL_IP22_ZILOG) += ip22zilog.o
 obj-$(CONFIG_SERIAL_SUNSU) += sunsu.o
 obj-$(CONFIG_SERIAL_SUNSAB) += sunsab.o
+obj-$(CONFIG_SERIAL_SUNHV) += sunhv.o
 obj-$(CONFIG_SERIAL_MUX) += mux.o
 obj-$(CONFIG_SERIAL_68328) += 68328serial.o
 obj-$(CONFIG_SERIAL_68360) += 68360serial.o

include/linux/serial_core.h

@@ -127,6 +127,9 @@
 /* Hilscher netx */
 #define PORT_NETX	71
 
+/* SUN4V Hypervisor Console */
+#define PORT_SUNHV	72
+
 #ifdef __KERNEL__
 
 #include <linux/config.h>