1 files changed, 60 insertions, 0 deletions
diff --git a/usr.sbin/bhyve/uart.c b/usr.sbin/bhyve/uart.c
new file mode 100644
index 0000000..640f3bf
--- /dev/null
+++ b/usr.sbin/bhyve/uart.c
@@ -0,0 +1,60 @@
+/*-
+ * Copyright (c) 2011 NetApp, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <assert.h>
+
+#include "inout.h"
+
+#define	COM1		0x3F8
+#define	COM2		0x2F8
+
+#define	REG_IIR		2
+
+static int
+com_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
+	    uint32_t *eax, void *arg)
+{
+	assert(in);
+
+	if (bytes != 1)
+		return (-1);
+
+	/*
+	 * COM port is not implemented so we return 0xFF for all registers
+	 */
+	*eax = 0xFF;
+
+	return (0);
+}
+
+INOUT_PORT(uart, COM1 + REG_IIR, IOPORT_F_IN, com_handler);
+INOUT_PORT(uart, COM2 + REG_IIR, IOPORT_F_IN, com_handler);