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 /* 33 * Dynamic binding of event channels and VIRQ sources to guest IRQ space. 34 */ 35 36 /* 37 * Bind a caller port event channel to an interrupt handler. If 38 * successful, the guest IRQ number is returned in *irqp. Return zero 39 * on success or errno otherwise. 40 */ 41 extern int bind_caller_port_to_irqhandler(unsigned int caller_port, 42 const char *devname, driver_intr_t handler, void *arg, 43 unsigned long irqflags, unsigned int *irqp); 44 45 /* 46 * Bind a listening port to an interrupt handler. If successful, the 47 * guest IRQ number is returned in *irqp. Return zero on success or 48 * errno otherwise. 49 */ 50 extern int bind_listening_port_to_irqhandler(unsigned int remote_domain, 51 const char *devname, driver_intr_t handler, void *arg, 52 unsigned long irqflags, unsigned int *irqp); 53 54 /* 55 * Bind a VIRQ to an interrupt handler. If successful, the guest IRQ 56 * number is returned in *irqp. Return zero on success or errno 57 * otherwise. 58 */ 59 extern int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, 60 const char *devname, driver_filter_t filter, driver_intr_t handler, 61 void *arg, unsigned long irqflags, unsigned int *irqp); 62 63 /* 64 * Bind an IPI to an interrupt handler. If successful, the guest 65 * IRQ number is returned in *irqp. Return zero on success or errno 66 * otherwise. 67 */ 68 extern int bind_ipi_to_irqhandler(unsigned int ipi, unsigned int cpu, 69 const char *devname, driver_filter_t filter, 70 unsigned long irqflags, unsigned int *irqp); 71 72 /* 73 * Bind an interdomain event channel to an interrupt handler. If 74 * successful, the guest IRQ number is returned in *irqp. Return zero 75 * on success or errno otherwise. 76 */ 77 extern int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain, 78 unsigned int remote_port, const char *devname, 79 driver_intr_t handler, void *arg, 80 unsigned long irqflags, unsigned int *irqp); 81 82 /* 83 * Unbind an interrupt handler using the guest IRQ number returned 84 * when it was bound. 85 */ 86 extern void unbind_from_irqhandler(unsigned int irq); 87 88 static __inline__ int irq_cannonicalize(unsigned int irq) 89 { 90 return (irq == 2) ? 9 : irq; 91 } 92 93 extern void disable_irq(unsigned int); 94 extern void disable_irq_nosync(unsigned int); 95 extern void enable_irq(unsigned int); 96 97 extern void irq_suspend(void); 98 extern void irq_resume(void); 99 100 extern void idle_block(void); 101 extern int ap_cpu_initclocks(int cpu); 102 103 #endif /* _XEN_INTR_H_ */ 104