atkbdc.c revision 264916 
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: head/usr.sbin/bhyve/atkbdc.c 264916 2014-04-25 13:38:18Z tychon $");
29
30#include <sys/types.h>
31
32#include <machine/vmm.h>
33
34#include <stdio.h>
35
36#include "inout.h"
37#include "pci_lpc.h"
38
39#define	KBD_DATA_PORT		0x60
40
41#define	KBD_STS_CTL_PORT	0x64
42#define	 KDB_SYS_FLAG		0x4
43
44#define	KBDC_RESET		0xfe
45
46static int
47atkbdc_data_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
48    uint32_t *eax, void *arg)
49{
50	if (bytes != 1)
51		return (INOUT_ERROR);
52
53	*eax = 0;
54
55	return (INOUT_OK);
56}
57
58static int
59atkbdc_sts_ctl_handler(struct vmctx *ctx, int vcpu, int in, int port,
60    int bytes, uint32_t *eax, void *arg)
61{
62	int retval;
63
64	if (bytes != 1)
65		return (INOUT_ERROR);
66
67	retval = INOUT_OK;
68	if (in) {
69		*eax = KDB_SYS_FLAG;	/* system passed POST */
70	} else {
71		switch (*eax) {
72		case KBDC_RESET:	/* Pulse "reset" line. */
73			retval = INOUT_RESET;
74			break;
75		}
76	}
77
78	return (retval);
79}
80
81INOUT_PORT(atkdbc, KBD_DATA_PORT, IOPORT_F_INOUT, atkbdc_data_handler);
82SYSRES_IO(KBD_DATA_PORT, 1);
83INOUT_PORT(atkbdc, KBD_STS_CTL_PORT,  IOPORT_F_INOUT,
84    atkbdc_sts_ctl_handler);
85SYSRES_IO(KBD_STS_CTL_PORT, 1);
86