1 /******************************************************************************
2 * arch/ia64/include/asm/xen/irq.h
4 * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
5 * VA Linux Systems Japan K.K.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #ifndef _ASM_IA64_XEN_IRQ_H
24 #define _ASM_IA64_XEN_IRQ_H
27 * The flat IRQ space is divided into two regions:
28 * 1. A one-to-one mapping of real physical IRQs. This space is only used
29 * if we have physical device-access privilege. This region is at the
30 * start of the IRQ space so that existing device drivers do not need
31 * to be modified to translate physical IRQ numbers into our IRQ space.
32 * 3. A dynamic mapping of inter-domain and Xen-sourced virtual IRQs. These
33 * are bound using the provided bind/unbind functions.
36 #define XEN_PIRQ_BASE 0
37 #define XEN_NR_PIRQS 256
39 #define XEN_DYNIRQ_BASE (XEN_PIRQ_BASE + XEN_NR_PIRQS)
40 #define XEN_NR_DYNIRQS (NR_CPUS * 8)
42 #define XEN_NR_IRQS (XEN_NR_PIRQS + XEN_NR_DYNIRQS)
44 #endif /* _ASM_IA64_XEN_IRQ_H */