X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-ia64%2Firq.h;h=96f58d78b7eca76dfb50774ae730e8b6cfb861b3;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=dbe86c0bbce5f896f25e4934228ac2c36228227a;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git

diff --git a/include/asm-ia64/irq.h b/include/asm-ia64/irq.h
index dbe86c0bb..96f58d78b 100644
--- a/include/asm-ia64/irq.h
+++ b/include/asm-ia64/irq.h
@@ -11,13 +11,39 @@
  * 02/29/00     D.Mosberger	moved most things into hw_irq.h
  */
 
+#ifndef CONFIG_XEN
 #define NR_IRQS		256
 #define NR_IRQ_VECTORS	NR_IRQS
-
+#else
 /*
- * IRQ line status macro IRQ_PER_CPU is used
+ * The flat IRQ space is divided into two regions:
+ *  1. A one-to-one mapping of real physical IRQs. This space is only used
+ *     if we have physical device-access privilege. This region is at the 
+ *     start of the IRQ space so that existing device drivers do not need
+ *     to be modified to translate physical IRQ numbers into our IRQ space.
+ *  3. A dynamic mapping of inter-domain and Xen-sourced virtual IRQs. These
+ *     are bound using the provided bind/unbind functions.
  */
-#define ARCH_HAS_IRQ_PER_CPU
+
+#define PIRQ_BASE		0
+#define NR_PIRQS		256
+
+#define DYNIRQ_BASE		(PIRQ_BASE + NR_PIRQS)
+#define NR_DYNIRQS		256
+
+#define NR_IRQS			(NR_PIRQS + NR_DYNIRQS)
+#define NR_IRQ_VECTORS		NR_IRQS
+
+#define pirq_to_irq(_x)		((_x) + PIRQ_BASE)
+#define irq_to_pirq(_x)		((_x) - PIRQ_BASE)
+
+#define dynirq_to_irq(_x)	((_x) + DYNIRQ_BASE)
+#define irq_to_dynirq(_x)	((_x) - DYNIRQ_BASE)
+
+#define RESCHEDULE_VECTOR	0
+#define IPI_VECTOR		1
+#define NR_IPIS			2
+#endif /* CONFIG_XEN */
 
 static __inline__ int
 irq_canonicalize (int irq)