diff options
Diffstat (limited to 'linux-2.4.26-xen-sparse/include/asm-xen/irq.h')
-rw-r--r-- | linux-2.4.26-xen-sparse/include/asm-xen/irq.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/linux-2.4.26-xen-sparse/include/asm-xen/irq.h b/linux-2.4.26-xen-sparse/include/asm-xen/irq.h new file mode 100644 index 0000000000..668195e9ca --- /dev/null +++ b/linux-2.4.26-xen-sparse/include/asm-xen/irq.h @@ -0,0 +1,59 @@ +#ifndef _ASM_IRQ_H +#define _ASM_IRQ_H + +/* + * linux/include/asm/irq.h + * + * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar + * + * IRQ/IPI changes taken from work by Thomas Radke + * <tomsoft@informatik.tu-chemnitz.de> + */ + +#include <linux/config.h> +#include <asm/hypervisor.h> +#include <asm/ptrace.h> + +/* + * 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 PIRQ_BASE 0 +#define NR_PIRQS 128 + +#define DYNIRQ_BASE (PIRQ_BASE + NR_PIRQS) +#define NR_DYNIRQS 128 + +#define NR_IRQS (NR_PIRQS + NR_DYNIRQS) + +#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) + +/* Dynamic binding of event channels and VIRQ sources to Linux IRQ space. */ +extern int bind_virq_to_irq(int virq); +extern void unbind_virq_from_irq(int virq); +extern int bind_evtchn_to_irq(int evtchn); +extern void unbind_evtchn_from_irq(int evtchn); + +static __inline__ int irq_cannonicalize(int irq) +{ + return (irq == 2) ? 9 : irq; +} + +extern void disable_irq(unsigned int); +extern void disable_irq_nosync(unsigned int); +extern void enable_irq(unsigned int); + +extern void irq_suspend(void); +extern void irq_resume(void); + +#endif /* _ASM_IRQ_H */ |