atkbdc.c revision 270159 
1/*-
2 * Copyright (c) 2014 Tycho Nightingale <tycho.nightingale@pluribusnetworks.com>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/10/usr.sbin/bhyve/atkbdc.c 270159 2014-08-19 01:20:24Z grehan $");
29
30#include <sys/types.h>
31
32#include <machine/vmm.h>
33
34#include <vmmapi.h>
35
36#include <assert.h>
37#include <errno.h>
38#include <stdio.h>
39
40#include "inout.h"
41#include "pci_lpc.h"
42
43#define	KBD_DATA_PORT		0x60
44
45#define	KBD_STS_CTL_PORT	0x64
46#define	 KBD_SYS_FLAG		0x4
47
48#define	KBDC_RESET		0xfe
49
50static int
51atkbdc_data_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
52    uint32_t *eax, void *arg)
53{
54	if (bytes != 1)
55		return (-1);
56
57	*eax = 0;
58
59	return (0);
60}
61
62static int
63atkbdc_sts_ctl_handler(struct vmctx *ctx, int vcpu, int in, int port,
64    int bytes, uint32_t *eax, void *arg)
65{
66	int error, retval;
67
68	if (bytes != 1)
69		return (-1);
70
71	retval = 0;
72	if (in) {
73		*eax = KBD_SYS_FLAG;	/* system passed POST */
74	} else {
75		switch (*eax) {
76		case KBDC_RESET:	/* Pulse "reset" line. */
77			error = vm_suspend(ctx, VM_SUSPEND_RESET);
78			assert(error == 0 || errno == EALREADY);
79			break;
80		}
81	}
82
83	return (retval);
84}
85
86INOUT_PORT(atkdbc, KBD_DATA_PORT, IOPORT_F_INOUT, atkbdc_data_handler);
87SYSRES_IO(KBD_DATA_PORT, 1);
88INOUT_PORT(atkbdc, KBD_STS_CTL_PORT,  IOPORT_F_INOUT,
89    atkbdc_sts_ctl_handler);
90SYSRES_IO(KBD_STS_CTL_PORT, 1);
91