[linux-block.git] / include / asm-ia64 / hw_irq.h

#ifndef _ASM_IA64_HW_IRQ_H
#define _ASM_IA64_HW_IRQ_H

/*
 * Copyright (C) 2001-2003 Hewlett-Packard Co
 *	David Mosberger-Tang <davidm@hpl.hp.com>
 */

#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/profile.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 AUTO_ASSIGN			-1

#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_NUM_DEVICE_VECTORS		(IA64_LAST_DEVICE_VECTOR - IA64_FIRST_DEVICE_VECTOR + 1)

#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 struct hw_interrupt_type irq_type_ia64_lsapic;	/* CPU-internal interrupt controller */

extern int assign_irq_vector_nopanic (int irq); /* allocate a free vector without panic */
extern int assign_irq_vector (int irq);	/* allocate a free vector */
extern void free_irq_vector (int 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 irq_desc_t irq_desc[NR_IRQS];

#ifndef CONFIG_IA64_GENERIC
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 irq_desc_t *
irq_descp (int irq)
{
	return irq_desc + irq;
}

/* Extract the IA-64 vector that corresponds to IRQ.  */
static inline ia64_vector
irq_to_vector (int irq)
{
	return (ia64_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 */
Commit	Line	Data
1da177e4 LT	1	#ifndef _ASM_IA64_HW_IRQ_H
	2	#define _ASM_IA64_HW_IRQ_H
	3
	4	/*
	5	* Copyright (C) 2001-2003 Hewlett-Packard Co
	6	* David Mosberger-Tang <davidm@hpl.hp.com>
	7	*/
	8
	9	#include <linux/interrupt.h>
	10	#include <linux/sched.h>
	11	#include <linux/types.h>
	12	#include <linux/profile.h>
	13
	14	#include <asm/machvec.h>
	15	#include <asm/ptrace.h>
	16	#include <asm/smp.h>
	17
	18	typedef u8 ia64_vector;
	19
	20	/*
	21	* 0 special
	22	*
	23	* 1,3-14 are reserved from firmware
	24	*
	25	* 16-255 (vectored external interrupts) are available
	26	*
	27	* 15 spurious interrupt (see IVR)
	28	*
	29	* 16 lowest priority, 255 highest priority
	30	*
	31	* 15 classes of 16 interrupts each.
	32	*/
	33	#define IA64_MIN_VECTORED_IRQ 16
	34	#define IA64_MAX_VECTORED_IRQ 255
	35	#define IA64_NUM_VECTORS 256
	36
	37	#define AUTO_ASSIGN -1
	38
	39	#define IA64_SPURIOUS_INT_VECTOR 0x0f
	40
	41	/*
	42	* Vectors 0x10-0x1f are used for low priority interrupts, e.g. CMCI.
	43	*/
	44	#define IA64_CPEP_VECTOR 0x1c /* corrected platform error polling vector */
	45	#define IA64_CMCP_VECTOR 0x1d /* corrected machine-check polling vector */
	46	#define IA64_CPE_VECTOR 0x1e /* corrected platform error interrupt vector */
	47	#define IA64_CMC_VECTOR 0x1f /* corrected machine-check interrupt vector */
	48	/*
	49	* Vectors 0x20-0x2f are reserved for legacy ISA IRQs.
	50	*/
	51	#define IA64_FIRST_DEVICE_VECTOR 0x30
	52	#define IA64_LAST_DEVICE_VECTOR 0xe7
	53	#define IA64_NUM_DEVICE_VECTORS (IA64_LAST_DEVICE_VECTOR - IA64_FIRST_DEVICE_VECTOR + 1)
	54
	55	#define IA64_MCA_RENDEZ_VECTOR 0xe8 /* MCA rendez interrupt */
	56	#define IA64_PERFMON_VECTOR 0xee /* performanc monitor interrupt vector */
	57	#define IA64_TIMER_VECTOR 0xef /* use highest-prio group 15 interrupt for timer */
	58	#define IA64_MCA_WAKEUP_VECTOR 0xf0 /* MCA wakeup (must be >MCA_RENDEZ_VECTOR) */
	59	#define IA64_IPI_RESCHEDULE 0xfd /* SMP reschedule */
	60	#define IA64_IPI_VECTOR 0xfe /* inter-processor interrupt vector */
	61
	62	/* Used for encoding redirected irqs */
	63
	64	#define IA64_IRQ_REDIRECTED (1 << 31)
65
66	/* IA64 inter-cpu interrupt related definitions */
67
68	#define IA64_IPI_DEFAULT_BASE_ADDR 0xfee00000
69
70	/* Delivery modes for inter-cpu interrupts */
71	enum {
72	IA64_IPI_DM_INT = 0x0, /* pend an external interrupt */
73	IA64_IPI_DM_PMI = 0x2, /* pend a PMI */
74	IA64_IPI_DM_NMI = 0x4, /* pend an NMI (vector 2) */
75	IA64_IPI_DM_INIT = 0x5, /* pend an INIT interrupt */
76	IA64_IPI_DM_EXTINT = 0x7, /* pend an 8259-compatible interrupt. */
77	};
78
79	extern __u8 isa_irq_to_vector_map[16];
80	#define isa_irq_to_vector(x) isa_irq_to_vector_map[(x)]
81
82	extern struct hw_interrupt_type irq_type_ia64_lsapic; /* CPU-internal interrupt controller */
83
24eeb568	84	extern int assign_irq_vector_nopanic (int irq); /* allocate a free vector without panic */
1da177e4 LT	85	extern int assign_irq_vector (int irq); /* allocate a free vector */
	86	extern void free_irq_vector (int vector);
	87	extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect);
	88	extern void register_percpu_irq (ia64_vector vec, struct irqaction *action);
	89
	90	static inline void
	91	hw_resend_irq (struct hw_interrupt_type *h, unsigned int vector)
	92	{
	93	platform_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0);
	94	}
	95
	96	/*
	97	* Default implementations for the irq-descriptor API:
	98	*/
	99
	100	extern irq_desc_t irq_desc[NR_IRQS];
	101
	102	#ifndef CONFIG_IA64_GENERIC
	103	static inline unsigned int
	104	__ia64_local_vector_to_irq (ia64_vector vec)
	105	{
	106	return (unsigned int) vec;
	107	}
	108	#endif
	109
	110	/*
	111	* Next follows the irq descriptor interface. On IA-64, each CPU supports 256 interrupt
	112	* vectors. On smaller systems, there is a one-to-one correspondence between interrupt
	113	* vectors and the Linux irq numbers. However, larger systems may have multiple interrupt
	114	* domains meaning that the translation from vector number to irq number depends on the
	115	* interrupt domain that a CPU belongs to. This API abstracts such platform-dependent
	116	* differences and provides a uniform means to translate between vector and irq numbers
	117	* and to obtain the irq descriptor for a given irq number.
	118	*/
	119
	120	/* Return a pointer to the irq descriptor for IRQ. */
	121	static inline irq_desc_t *
	122	irq_descp (int irq)
	123	{
	124	return irq_desc + irq;
	125	}
	126
	127	/* Extract the IA-64 vector that corresponds to IRQ. */
	128	static inline ia64_vector
	129	irq_to_vector (int irq)
	130	{
	131	return (ia64_vector) irq;
	132	}
	133
	134	/*
	135	* Convert the local IA-64 vector to the corresponding irq number. This translation is
	136	* done in the context of the interrupt domain that the currently executing CPU belongs
	137	* to.
	138	*/
	139	static inline unsigned int
	140	local_vector_to_irq (ia64_vector vec)
	141	{
	142	return platform_local_vector_to_irq(vec);
	143	}
	144
	145	#endif /* _ASM_IA64_HW_IRQ_H */