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