aha/include/xen/events.h
Jeremy Fitzhardinge b536b4b962 xen: use the hvc console infrastructure for Xen console
Implement a Xen back-end for hvc console.

* * *
Add early printk support via hvc console, enable using
"earlyprintk=xen" on the kernel command line.

From: Gerd Hoffmann <kraxel@suse.de>
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Olof Johansson <olof@lixom.net>
2007-07-18 08:47:44 -07:00

48 lines
1.3 KiB
C

#ifndef _XEN_EVENTS_H
#define _XEN_EVENTS_H
#include <linux/interrupt.h>
#include <xen/interface/event_channel.h>
#include <asm/xen/hypercall.h>
enum ipi_vector {
XEN_RESCHEDULE_VECTOR,
XEN_CALL_FUNCTION_VECTOR,
XEN_NR_IPIS,
};
int bind_evtchn_to_irq(unsigned int evtchn);
int bind_evtchn_to_irqhandler(unsigned int evtchn,
irq_handler_t handler,
unsigned long irqflags, const char *devname,
void *dev_id);
int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
irq_handler_t handler,
unsigned long irqflags, const char *devname,
void *dev_id);
int bind_ipi_to_irqhandler(enum ipi_vector ipi,
unsigned int cpu,
irq_handler_t handler,
unsigned long irqflags,
const char *devname,
void *dev_id);
/*
* Common unbind function for all event sources. Takes IRQ to unbind from.
* Automatically closes the underlying event channel (even for bindings
* made with bind_evtchn_to_irqhandler()).
*/
void unbind_from_irqhandler(unsigned int irq, void *dev_id);
void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
static inline void notify_remote_via_evtchn(int port)
{
struct evtchn_send send = { .port = port };
(void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
}
extern void notify_remote_via_irq(int irq);
#endif /* _XEN_EVENTS_H */