static void
pci_uart_drain(int fd, enum ev_type ev, void *arg)
{
struct pci_uart_softc *sc;
int ch;
sc = arg;
assert(fd == STDIN_FILENO);
assert(ev == EVF_READ);
/*
* This routine is called in the context of the mevent thread
* to take out the softc lock to protect against concurrent
* access from a vCPU i/o exit
*/
pthread_mutex_lock(&sc->mtx);
if ((sc->mcr & MCR_LOOPBACK) != 0) {
(void) ttyread();
} else {
while (fifo_available(&sc->rxfifo) &&
((ch = ttyread()) != -1)) {
fifo_putchar(&sc->rxfifo, ch);
}
pci_uart_toggle_intr(sc);
}
pthread_mutex_unlock(&sc->mtx);
}
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);
}
