ia64/xen: add definitions necessary for xen event channel.

/******************************************************************************

 * arch/ia64/include/asm/xen/events.h

 *

 * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>

 *                    VA Linux Systems Japan K.K.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 */

#ifndef _ASM_IA64_XEN_EVENTS_H

#define _ASM_IA64_XEN_EVENTS_H

enum ipi_vector {

	XEN_RESCHEDULE_VECTOR,

	XEN_IPI_VECTOR,

	XEN_CMCP_VECTOR,

	XEN_CPEP_VECTOR,

	XEN_NR_IPIS,

};

static inline int xen_irqs_disabled(struct pt_regs *regs)

{

	return !(ia64_psr(regs)->i);

}

static inline void xen_do_IRQ(int irq, struct pt_regs *regs)

{

	struct pt_regs *old_regs;

	old_regs = set_irq_regs(regs);

	irq_enter();

	__do_IRQ(irq);

	irq_exit();

	set_irq_regs(old_regs);

}

#define irq_ctx_init(cpu)	do { } while (0)

#endif /* _ASM_IA64_XEN_EVENTS_H */