diff options
Diffstat (limited to 'usr.sbin/bhyve/uart.c')
-rw-r--r-- | usr.sbin/bhyve/uart.c | 60 |
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); |