1 files changed, 16 insertions, 0 deletions

diff --git a/sys/dev/uart/uart_if.m b/sys/dev/uart/uart_if.m
index bfac07134486..aab777172fb0 100644
--- a/sys/dev/uart/uart_if.m
+++ b/sys/dev/uart/uart_if.m
@@ -141,3 +141,19 @@ METHOD int setsig {
 METHOD int transmit {
 	struct uart_softc *this;
 };
+
+# grab() - Up call from the console to the upper layers of the driver when
+# the kernel asks to grab the console. This is valid only for console
+# drivers. This method is responsible for transitioning the hardware
+# from an interrupt driven state to a polled state that works with the
+# low-level console interface defined for this device. The kernel
+# currently only calls this when it wants to grab input from the
+# console. Output can still happen asyncrhonously to these calls.
+METHOD void grab {
+	struct uart_softc *this;
+};
+
+# ungrab() - Undoes the effects of grab().
+METHOD void ungrab {
+	struct uart_softc *this;
+};