1/*- 2 * Copyright (c) 2011 NetApp, Inc. 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 NETAPP, INC ``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 NETAPP, INC 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 * $FreeBSD$ 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD$"); 31 32#include <sys/types.h> 33#include <sys/select.h> 34 35#include <stdio.h> 36#include <stdlib.h> 37#include <termios.h> 38#include <unistd.h> 39#include <stdbool.h> 40 41#include "inout.h" 42 43#define BVM_CONSOLE_PORT 0x220 44#define BVM_CONS_SIG ('b' << 8 | 'v') 45 46static struct termios tio_orig, tio_new; 47 48static void 49ttyclose(void) 50{ 51 tcsetattr(STDIN_FILENO, TCSANOW, &tio_orig); 52} 53 54static void 55ttyopen(void) 56{ 57 tcgetattr(STDIN_FILENO, &tio_orig); 58 59 cfmakeraw(&tio_new); 60 tcsetattr(STDIN_FILENO, TCSANOW, &tio_new); 61 62 atexit(ttyclose); 63} 64 65static bool 66tty_char_available(void) 67{ 68 fd_set rfds; 69 struct timeval tv; 70 71 FD_ZERO(&rfds); 72 FD_SET(STDIN_FILENO, &rfds); 73 tv.tv_sec = 0; 74 tv.tv_usec = 0; 75 if (select(STDIN_FILENO + 1, &rfds, NULL, NULL, &tv) > 0) { 76 return (true); 77 } else { 78 return (false); 79 } 80} 81 82static int 83ttyread(void) 84{ 85 char rb; 86 87 if (tty_char_available()) { 88 read(STDIN_FILENO, &rb, 1); 89 return (rb & 0xff); 90 } else { 91 return (-1); 92 } 93} 94 95static void 96ttywrite(unsigned char wb) 97{ 98 (void) write(STDOUT_FILENO, &wb, 1); 99} 100 101static int 102console_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, 103 uint32_t *eax, void *arg) 104{ 105 static int opened; 106 107 if (bytes == 2 && in) { 108 *eax = BVM_CONS_SIG; 109 return (0); 110 } 111 112 if (bytes != 4) 113 return (-1); 114 115 if (!opened) { 116 ttyopen(); 117 opened = 1; 118 } 119 120 if (in) 121 *eax = ttyread(); 122 else 123 ttywrite(*eax); 124 125 return (0); 126} 127 128static struct inout_port consport = { 129 "bvmcons", 130 BVM_CONSOLE_PORT, 131 1, 132 IOPORT_F_INOUT, 133 console_handler 134}; 135 136void 137init_bvmcons(void) 138{ 139 140 register_inout(&consport); 141} 142