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#ifndef __XEN_IRQ_H__
#define __XEN_IRQ_H__
#include <xen/config.h>
#include <xen/cpumask.h>
#include <xen/spinlock.h>
#include <asm/regs.h>
#include <asm/hardirq.h>
struct irqaction
{
void (*handler)(int, void *, struct cpu_user_regs *);
const char *name;
void *dev_id;
};
/*
* IRQ line status.
*/
#define IRQ_INPROGRESS 1 /* IRQ handler active - do not enter! */
#define IRQ_DISABLED 2 /* IRQ disabled - do not enter! */
#define IRQ_PENDING 4 /* IRQ pending - replay on enable */
#define IRQ_REPLAY 8 /* IRQ has been replayed but not acked yet */
#define IRQ_GUEST 16 /* IRQ is handled by guest OS(es) */
#define IRQ_PER_CPU 256 /* IRQ is per CPU */
/*
* Interrupt controller descriptor. This is all we need
* to describe about the low-level hardware.
*/
struct hw_interrupt_type {
const char *typename;
unsigned int (*startup)(unsigned int irq);
void (*shutdown)(unsigned int irq);
void (*enable)(unsigned int irq);
void (*disable)(unsigned int irq);
void (*ack)(unsigned int irq);
void (*end)(unsigned int irq);
void (*set_affinity)(unsigned int irq, cpumask_t mask);
};
typedef struct hw_interrupt_type hw_irq_controller;
#include <asm/irq.h>
/*
* This is the "IRQ descriptor", which contains various information
* about the irq, including what kind of hardware handling it has,
* whether it is disabled etc etc.
*
* Pad this out to 32 bytes for cache and indexing reasons.
*/
typedef struct {
unsigned int status; /* IRQ status */
hw_irq_controller *handler;
struct irqaction *action; /* IRQ action list */
unsigned int depth; /* nested irq disables */
spinlock_t lock;
} __cacheline_aligned irq_desc_t;
extern irq_desc_t irq_desc[NR_IRQS];
extern int setup_irq(unsigned int, struct irqaction *);
extern void free_irq(unsigned int);
extern hw_irq_controller no_irq_type;
extern void no_action(int cpl, void *dev_id, struct cpu_user_regs *regs);
struct domain;
struct vcpu;
extern int pirq_guest_unmask(struct domain *p);
extern int pirq_guest_bind(struct vcpu *p, int irq, int will_share);
extern int pirq_guest_unbind(struct domain *p, int irq);
extern int pirq_guest_bindable(int irq, int will_share);
#endif /* __XEN_IRQ_H__ */
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