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#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/consio.h>
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/tty.h>
#include <sys/systm.h>
#include <sys/taskqueue.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <machine/stdarg.h>
#include <machine/xen/xen-os.h>
#include <machine/xen/hypervisor.h>
#include <machine/xen/xen_intr.h>
#include <sys/cons.h>
#include <dev/xen/console/xencons_ring.h>
#include <machine/xen/evtchn.h>
#include <xen/interface/io/console.h>
#define console_evtchn console.domU.evtchn
extern char *console_page;
static inline struct xencons_interface *
xencons_interface(void)
{
return (struct xencons_interface *)console_page;
}
int
xencons_has_input(void)
{
struct xencons_interface *intf;
intf = xencons_interface();
return (intf->in_cons != intf->in_prod);
}
int
xencons_ring_send(const char *data, unsigned len)
{
struct xencons_interface *intf;
XENCONS_RING_IDX cons, prod;
int sent;
intf = xencons_interface();
cons = intf->out_cons;
prod = intf->out_prod;
sent = 0;
mb();
PANIC_IF((prod - cons) > sizeof(intf->out));
while ((sent < len) && ((prod - cons) < sizeof(intf->out)))
intf->out[MASK_XENCONS_IDX(prod++, intf->out)] = data[sent++];
wmb();
intf->out_prod = prod;
notify_remote_via_evtchn(xen_start_info->console_evtchn);
return sent;
}
static xencons_receiver_func *xencons_receiver;
void
xencons_handle_input(void *unused)
{
struct xencons_interface *intf;
XENCONS_RING_IDX cons, prod;
intf = xencons_interface();
cons = intf->in_cons;
prod = intf->in_prod;
/* XXX needs locking */
while (cons != prod) {
xencons_rx(intf->in + MASK_XENCONS_IDX(cons, intf->in), 1);
cons++;
}
mb();
intf->in_cons = cons;
notify_remote_via_evtchn(xen_start_info->console_evtchn);
xencons_tx();
}
void
xencons_ring_register_receiver(xencons_receiver_func *f)
{
xencons_receiver = f;
}
int
xencons_ring_init(void)
{
int err;
if (!xen_start_info->console_evtchn)
return 0;
err = bind_caller_port_to_irqhandler(xen_start_info->console_evtchn,
"xencons", xencons_handle_input, NULL,
INTR_TYPE_MISC | INTR_MPSAFE, NULL);
if (err) {
return err;
}
return 0;
}
#ifdef notyet
void
xencons_suspend(void)
{
if (!xen_start_info->console_evtchn)
return;
unbind_evtchn_from_irqhandler(xen_start_info->console_evtchn, NULL);
}
void
xencons_resume(void)
{
(void)xencons_ring_init();
}
#endif
/*
* Local variables:
* mode: C
* c-set-style: "BSD"
* c-basic-offset: 8
* tab-width: 4
* indent-tabs-mode: t
* End:
*/
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