1 /* -*- Mode:C; c-basic-offset:4; tab-width:4 -*- */ 2 #ifndef _XEN_INTR_H_ 3 #define _XEN_INTR_H_ 4 5 /* 6 * The flat IRQ space is divided into two regions: 7 * 1. A one-to-one mapping of real physical IRQs. This space is only used 8 * if we have physical device-access privilege. This region is at the 9 * start of the IRQ space so that existing device drivers do not need 10 * to be modified to translate physical IRQ numbers into our IRQ space. 11 * 3. A dynamic mapping of inter-domain and Xen-sourced virtual IRQs. These 12 * are bound using the provided bind/unbind functions. 13 * 14 * 15 * $FreeBSD$ 16 */ 17 18 #define PIRQ_BASE 0 19 #define NR_PIRQS 128 20 21 #define DYNIRQ_BASE (PIRQ_BASE + NR_PIRQS) 22 #define NR_DYNIRQS 128 23 24 #define NR_IRQS (NR_PIRQS + NR_DYNIRQS) 25 26 #define pirq_to_irq(_x) ((_x) + PIRQ_BASE) 27 #define irq_to_pirq(_x) ((_x) - PIRQ_BASE) 28 29 #define dynirq_to_irq(_x) ((_x) + DYNIRQ_BASE) 30 #define irq_to_dynirq(_x) ((_x) - DYNIRQ_BASE) 31 32 /* Dynamic binding of event channels and VIRQ sources to Linux IRQ space. */ 33 extern void unbind_from_irq(int irq); 34 35 extern int bind_caller_port_to_irqhandler(unsigned int caller_port, 36 const char *devname, driver_intr_t handler, void *arg, 37 unsigned long irqflags, unsigned int *irqp); 38 extern int bind_listening_port_to_irqhandler(unsigned int remote_domain, 39 const char *devname, driver_intr_t handler, void *arg, unsigned long irqflags, 40 unsigned int *irqp); 41 extern int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, 42 const char *devname, driver_filter_t filter, driver_intr_t handler, 43 void *arg, unsigned long irqflags, unsigned int *irqp); 44 extern int bind_ipi_to_irqhandler(unsigned int ipi, 45 unsigned int cpu, 46 const char *devname, 47 driver_filter_t handler, 48 unsigned long irqflags, 49 unsigned int *irqp); 50 51 extern int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain, 52 unsigned int remote_port, 53 const char *devname, 54 driver_filter_t filter, 55 driver_intr_t handler, 56 unsigned long irqflags, 57 unsigned int *irqp); 58 59 60 61 extern void unbind_from_irqhandler(unsigned int evtchn); 62 static __inline__ int irq_cannonicalize(int irq) 63 { 64 return (irq == 2) ? 9 : irq; 65 } 66 67 extern void disable_irq(unsigned int); 68 extern void disable_irq_nosync(unsigned int); 69 extern void enable_irq(unsigned int); 70 71 extern void irq_suspend(void); 72 extern void irq_resume(void); 73 74 extern void idle_block(void); 75 extern int ap_cpu_initclocks(int cpu); 76 77 #endif /* _XEN_INTR_H_ */ 78