166 lines
3.2 KiB
C
166 lines
3.2 KiB
C
/*-
|
|
* 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 <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <termios.h>
|
|
#include <unistd.h>
|
|
#include <stdbool.h>
|
|
|
|
#include "inout.h"
|
|
#include "lpc.h"
|
|
|
|
#define BVM_CONSOLE_PORT 0x220
|
|
#define BVM_CONS_SIG ('b' << 8 | 'v')
|
|
|
|
static bool bvmcons_enabled = false;
|
|
static struct termios tio_orig, tio_new;
|
|
|
|
static void
|
|
ttyclose(void)
|
|
{
|
|
tcsetattr(STDIN_FILENO, TCSANOW, &tio_orig);
|
|
}
|
|
|
|
static void
|
|
ttyopen(void)
|
|
{
|
|
tcgetattr(STDIN_FILENO, &tio_orig);
|
|
|
|
cfmakeraw(&tio_new);
|
|
tcsetattr(STDIN_FILENO, TCSANOW, &tio_new);
|
|
|
|
atexit(ttyclose);
|
|
}
|
|
|
|
static bool
|
|
tty_char_available(void)
|
|
{
|
|
fd_set rfds;
|
|
struct timeval tv;
|
|
|
|
FD_ZERO(&rfds);
|
|
FD_SET(STDIN_FILENO, &rfds);
|
|
tv.tv_sec = 0;
|
|
tv.tv_usec = 0;
|
|
if (select(STDIN_FILENO + 1, &rfds, NULL, NULL, &tv) > 0)
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
static int
|
|
ttyread(void)
|
|
{
|
|
char rb;
|
|
|
|
if (tty_char_available()) {
|
|
if (read(STDIN_FILENO, &rb, 1) > 0)
|
|
return (rb & 0xff);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
|
|
static int
|
|
ttywrite(unsigned char wb)
|
|
{
|
|
if (write(STDOUT_FILENO, &wb, 1) > 0)
|
|
return 1;
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
console_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
|
|
uint32_t *eax, void *arg)
|
|
{
|
|
static int opened;
|
|
|
|
if (bytes == 2 && in) {
|
|
*eax = BVM_CONS_SIG;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Guests might probe this port to look for old ISA devices
|
|
* using single-byte reads. Return 0xff for those.
|
|
*/
|
|
if (bytes == 1 && in) {
|
|
*eax = 0xff;
|
|
return 0;
|
|
}
|
|
|
|
if (bytes != 4)
|
|
return -1;
|
|
|
|
if (!opened) {
|
|
ttyopen();
|
|
opened = 1;
|
|
}
|
|
|
|
if (in)
|
|
*eax = ttyread();
|
|
else
|
|
ttywrite(*eax);
|
|
|
|
return 0;
|
|
}
|
|
|
|
SYSRES_IO(BVM_CONSOLE_PORT, 4);
|
|
|
|
static struct inout_port consport = {
|
|
"bvmcons",
|
|
BVM_CONSOLE_PORT,
|
|
1,
|
|
IOPORT_F_INOUT,
|
|
console_handler
|
|
};
|
|
|
|
void
|
|
enable_bvmcons(void)
|
|
{
|
|
bvmcons_enabled = true;
|
|
}
|
|
|
|
int
|
|
init_bvmcons(void)
|
|
{
|
|
if (bvmcons_enabled)
|
|
register_inout(&consport);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
deinit_bvmcons(void)
|
|
{
|
|
if (bvmcons_enabled)
|
|
unregister_inout(&consport);
|
|
}
|