The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/xen/xen_intr.h

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    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: releng/8.3/sys/xen/xen_intr.h 215788 2010-11-24 01:03:03Z gibbs $
   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_ */

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