Subversion Repositories or1k

#ifndef _ASM_IA64_HW_IRQ_H
#define _ASM_IA64_HW_IRQ_H
 
/*
 * Copyright (C) 2001, 2002 Hewlett-Packard Co
 *	David Mosberger-Tang <davidm@hpl.hp.com>
 */
 
#include <linux/sched.h>
#include <linux/types.h>
 
#include <asm/machvec.h>
#include <asm/ptrace.h>
#include <asm/smp.h>
 
typedef u8 ia64_vector;
 
/*
 * 0 special
 *
 * 1,3-14 are reserved from firmware
 *
 * 16-255 (vectored external interrupts) are available
 *
 * 15 spurious interrupt (see IVR)
 *
 * 16 lowest priority, 255 highest priority
 *
 * 15 classes of 16 interrupts each.
 */
#define IA64_MIN_VECTORED_IRQ		 16
#define IA64_MAX_VECTORED_IRQ		255
#define IA64_NUM_VECTORS		256
 
#define IA64_SPURIOUS_INT_VECTOR	0x0f
 
/*
 * Vectors 0x10-0x1f are used for low priority interrupts, e.g. CMCI.
 */
#define IA64_CPEP_VECTOR		0x1c	/* corrected platform error polling vector */
#define IA64_CMCP_VECTOR		0x1d	/* corrected machine-check polling vector */
#define IA64_CPE_VECTOR			0x1e	/* corrected platform error interrupt vector */
#define IA64_CMC_VECTOR			0x1f	/* corrected machine-check interrupt vector */
/*
 * Vectors 0x20-0x2f are reserved for legacy ISA IRQs.
 */
#define IA64_FIRST_DEVICE_VECTOR	0x30
#define IA64_LAST_DEVICE_VECTOR		0xe7
 
#define IA64_MCA_RENDEZ_VECTOR		0xe8	/* MCA rendez interrupt */
#define IA64_PERFMON_VECTOR		0xee	/* performanc monitor interrupt vector */
#define IA64_TIMER_VECTOR		0xef	/* use highest-prio group 15 interrupt for timer */
#define	IA64_MCA_WAKEUP_VECTOR		0xf0	/* MCA wakeup (must be >MCA_RENDEZ_VECTOR) */
#define IA64_IPI_RESCHEDULE		0xfd	/* SMP reschedule */
#define IA64_IPI_VECTOR			0xfe	/* inter-processor interrupt vector */
 
/* Used for encoding redirected irqs */
 
#define IA64_IRQ_REDIRECTED		(1 << 31)
 
/* IA64 inter-cpu interrupt related definitions */
 
#define IA64_IPI_DEFAULT_BASE_ADDR	0xfee00000
 
/* Delivery modes for inter-cpu interrupts */
enum {
        IA64_IPI_DM_INT =       0x0,    /* pend an external interrupt */
        IA64_IPI_DM_PMI =       0x2,    /* pend a PMI */
        IA64_IPI_DM_NMI =       0x4,    /* pend an NMI (vector 2) */
        IA64_IPI_DM_INIT =      0x5,    /* pend an INIT interrupt */
        IA64_IPI_DM_EXTINT =    0x7,    /* pend an 8259-compatible interrupt. */
};
 
extern __u8 isa_irq_to_vector_map[16];
#define isa_irq_to_vector(x)	isa_irq_to_vector_map[(x)]
 
extern unsigned long ipi_base_addr;
 
extern struct hw_interrupt_type irq_type_ia64_lsapic;	/* CPU-internal interrupt controller */
 
extern int ia64_alloc_vector (void);	/* allocate a free vector */
extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect);
extern void register_percpu_irq (ia64_vector vec, struct irqaction *action);
 
static inline void
hw_resend_irq (struct hw_interrupt_type *h, unsigned int vector)
{
	platform_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0);
}
 
/*
 * Default implementations for the irq-descriptor API:
 */
 
extern struct irq_desc _irq_desc[NR_IRQS];
 
#ifndef CONFIG_IA64_GENERIC
static inline struct irq_desc *
__ia64_irq_desc (unsigned int irq)
{
	return _irq_desc + irq;
}
 
static inline ia64_vector
__ia64_irq_to_vector (unsigned int irq)
{
	return (ia64_vector) irq;
}
 
static inline unsigned int
__ia64_local_vector_to_irq (ia64_vector vec)
{
	return (unsigned int) vec;
}
#endif
 
/*
 * Next follows the irq descriptor interface.  On IA-64, each CPU supports 256 interrupt
 * vectors.  On smaller systems, there is a one-to-one correspondence between interrupt
 * vectors and the Linux irq numbers.  However, larger systems may have multiple interrupt
 * domains meaning that the translation from vector number to irq number depends on the
 * interrupt domain that a CPU belongs to.  This API abstracts such platform-dependent
 * differences and provides a uniform means to translate between vector and irq numbers
 * and to obtain the irq descriptor for a given irq number.
 */
 
/* Return a pointer to the irq descriptor for IRQ.  */
static inline struct irq_desc *
irq_desc (int irq)
{
	return platform_irq_desc(irq);
}
 
/* Extract the IA-64 vector that corresponds to IRQ.  */
static inline ia64_vector
irq_to_vector (int irq)
{
	return platform_irq_to_vector(irq);
}
 
/*
 * Convert the local IA-64 vector to the corresponding irq number.  This translation is
 * done in the context of the interrupt domain that the currently executing CPU belongs
 * to.
 */
static inline unsigned int
local_vector_to_irq (ia64_vector vec)
{
	return platform_local_vector_to_irq(vec);
}
 
#endif /* _ASM_IA64_HW_IRQ_H */