[linux-2.6-block.git] / arch / ia64 / include / asm / 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.
 * Use vectors 0x30-0xe7 as the default device vector range for ia64.
 * Platforms may choose to reduce this range in platform_irq_setup, but the
 * platform range must fall within
 *	[IA64_DEF_FIRST_DEVICE_VECTOR..IA64_DEF_LAST_DEVICE_VECTOR]
 */
extern int ia64_first_device_vector;
extern int ia64_last_device_vector;

#if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) || defined (CONFIG_IA64_DIG))
/* Reserve the lower priority vector than device vectors for "move IRQ" IPI */
#define IA64_IRQ_MOVE_VECTOR		0x30	/* "move IRQ" IPI */
#define IA64_DEF_FIRST_DEVICE_VECTOR	0x31
#else
#define IA64_DEF_FIRST_DEVICE_VECTOR	0x30
#endif
#define IA64_DEF_LAST_DEVICE_VECTOR	0xe7
#define IA64_FIRST_DEVICE_VECTOR	ia64_first_device_vector
#define IA64_LAST_DEVICE_VECTOR		ia64_last_device_vector
#define IA64_MAX_DEVICE_VECTORS		(IA64_DEF_LAST_DEVICE_VECTOR - IA64_DEF_FIRST_DEVICE_VECTOR + 1)
#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	/* performance 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_LOCAL_TLB_FLUSH	0xfc	/* SMP flush local TLB */
#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)]

struct irq_cfg {
	ia64_vector vector;
	cpumask_t domain;
	cpumask_t old_domain;
	unsigned move_cleanup_count;
	u8 move_in_progress : 1;
};
extern spinlock_t vector_lock;
extern struct irq_cfg irq_cfg[NR_IRQS];
#define irq_to_domain(x)	irq_cfg[(x)].domain
DECLARE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq);

extern struct irq_chip irq_type_ia64_lsapic;	/* CPU-internal interrupt controller */

#define ia64_register_ipi	ia64_native_register_ipi
#define assign_irq_vector	ia64_native_assign_irq_vector
#define free_irq_vector		ia64_native_free_irq_vector
#define register_percpu_irq	ia64_native_register_percpu_irq
#define ia64_resend_irq		ia64_native_resend_irq

extern void ia64_native_register_ipi(void);
extern int bind_irq_vector(int irq, int vector, cpumask_t domain);
extern int ia64_native_assign_irq_vector (int irq);	/* allocate a free vector */
extern void ia64_native_free_irq_vector (int vector);
extern int reserve_irq_vector (int vector);
extern void __setup_vector_irq(int cpu);
extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect);
extern void ia64_native_register_percpu_irq (ia64_vector vec, struct irqaction *action);
extern void destroy_and_reserve_irq (unsigned int irq);

#if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_DIG))
extern int irq_prepare_move(int irq, int cpu);
extern void irq_complete_move(unsigned int irq);
#else
static inline int irq_prepare_move(int irq, int cpu) { return 0; }
static inline void irq_complete_move(unsigned int irq) {}
#endif

static inline void ia64_native_resend_irq(unsigned int vector)
{
	platform_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0);
}

/*
 * Default implementations for the irq-descriptor API:
 */
#ifndef CONFIG_IA64_GENERIC
static inline ia64_vector __ia64_irq_to_vector(int irq)
{
	return irq_cfg[irq].vector;
}

static inline unsigned int
__ia64_local_vector_to_irq (ia64_vector vec)
{
	return __this_cpu_read(vector_irq[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.
 */

/* 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 */
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.
10083072 MM	50	* Use vectors 0x30-0xe7 as the default device vector range for ia64.
	51	* Platforms may choose to reduce this range in platform_irq_setup, but the
	52	* platform range must fall within
	53	* [IA64_DEF_FIRST_DEVICE_VECTOR..IA64_DEF_LAST_DEVICE_VECTOR]
1da177e4	54	*/
10083072 MM	55	extern int ia64_first_device_vector;
	56	extern int ia64_last_device_vector;
	57
09b366b7 KK	58	#if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) \|\| defined (CONFIG_IA64_DIG))
	59	/* Reserve the lower priority vector than device vectors for "move IRQ" IPI */
	60	#define IA64_IRQ_MOVE_VECTOR 0x30 /* "move IRQ" IPI */
	61	#define IA64_DEF_FIRST_DEVICE_VECTOR 0x31
	62	#else
10083072	63	#define IA64_DEF_FIRST_DEVICE_VECTOR 0x30
09b366b7	64	#endif
10083072 MM	65	#define IA64_DEF_LAST_DEVICE_VECTOR 0xe7
	66	#define IA64_FIRST_DEVICE_VECTOR ia64_first_device_vector
	67	#define IA64_LAST_DEVICE_VECTOR ia64_last_device_vector
	68	#define IA64_MAX_DEVICE_VECTORS (IA64_DEF_LAST_DEVICE_VECTOR - IA64_DEF_FIRST_DEVICE_VECTOR + 1)
1da177e4 LT	69	#define IA64_NUM_DEVICE_VECTORS (IA64_LAST_DEVICE_VECTOR - IA64_FIRST_DEVICE_VECTOR + 1)
	70
	71	#define IA64_MCA_RENDEZ_VECTOR 0xe8 /* MCA rendez interrupt */
313d8e57	72	#define IA64_PERFMON_VECTOR 0xee /* performance monitor interrupt vector */
1da177e4 LT	73	#define IA64_TIMER_VECTOR 0xef /* use highest-prio group 15 interrupt for timer */
1da177e4 LT	74	#define IA64_MCA_WAKEUP_VECTOR 0xf0 /* MCA wakeup (must be >MCA_RENDEZ_VECTOR) */
3be44b9c	75	#define IA64_IPI_LOCAL_TLB_FLUSH 0xfc /* SMP flush local TLB */
1da177e4 LT	76	#define IA64_IPI_RESCHEDULE 0xfd /* SMP reschedule */
	77	#define IA64_IPI_VECTOR 0xfe /* inter-processor interrupt vector */
	78
	79	/* Used for encoding redirected irqs */
	80
	81	#define IA64_IRQ_REDIRECTED (1 << 31)
	82
	83	/* IA64 inter-cpu interrupt related definitions */
	84
	85	#define IA64_IPI_DEFAULT_BASE_ADDR 0xfee00000
	86
	87	/* Delivery modes for inter-cpu interrupts */
	88	enum {
	89	IA64_IPI_DM_INT = 0x0, /* pend an external interrupt */
	90	IA64_IPI_DM_PMI = 0x2, /* pend a PMI */
	91	IA64_IPI_DM_NMI = 0x4, /* pend an NMI (vector 2) */
	92	IA64_IPI_DM_INIT = 0x5, /* pend an INIT interrupt */
	93	IA64_IPI_DM_EXTINT = 0x7, /* pend an 8259-compatible interrupt. */
	94	};
	95
	96	extern __u8 isa_irq_to_vector_map[16];
	97	#define isa_irq_to_vector(x) isa_irq_to_vector_map[(x)]
	98
e1b30a39 YI	99	struct irq_cfg {
e1b30a39 YI	100	ia64_vector vector;
4994be1b	101	cpumask_t domain;
a6cd6322 KK	102	cpumask_t old_domain;
	103	unsigned move_cleanup_count;
	104	u8 move_in_progress : 1;
e1b30a39 YI	105	};
	106	extern spinlock_t vector_lock;
	107	extern struct irq_cfg irq_cfg[NR_IRQS];
4994be1b	108	#define irq_to_domain(x) irq_cfg[(x)].domain
e1b30a39 YI	109	DECLARE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq);
e1b30a39 YI	110
fb824f48	111	extern struct irq_chip irq_type_ia64_lsapic; /* CPU-internal interrupt controller */
1da177e4	112
85cbc503 IY	113	#define ia64_register_ipi ia64_native_register_ipi
	114	#define assign_irq_vector ia64_native_assign_irq_vector
	115	#define free_irq_vector ia64_native_free_irq_vector
	116	#define register_percpu_irq ia64_native_register_percpu_irq
	117	#define ia64_resend_irq ia64_native_resend_irq
85cbc503 IY	118
85cbc503 IY	119	extern void ia64_native_register_ipi(void);
4994be1b	120	extern int bind_irq_vector(int irq, int vector, cpumask_t domain);
85cbc503 IY	121	extern int ia64_native_assign_irq_vector (int irq); /* allocate a free vector */
85cbc503 IY	122	extern void ia64_native_free_irq_vector (int vector);
10083072	123	extern int reserve_irq_vector (int vector);
e1b30a39	124	extern void __setup_vector_irq(int cpu);
1da177e4	125	extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect);
85cbc503	126	extern void ia64_native_register_percpu_irq (ia64_vector vec, struct irqaction *action);
e1b30a39	127	extern void destroy_and_reserve_irq (unsigned int irq);
1da177e4	128
a6cd6322 KK	129	#if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) \|\| defined(CONFIG_IA64_DIG))
	130	extern int irq_prepare_move(int irq, int cpu);
	131	extern void irq_complete_move(unsigned int irq);
	132	#else
	133	static inline int irq_prepare_move(int irq, int cpu) { return 0; }
	134	static inline void irq_complete_move(unsigned int irq) {}
	135	#endif
	136
85cbc503	137	static inline void ia64_native_resend_irq(unsigned int vector)
1da177e4 LT	138	{
	139	platform_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0);
	140	}
	141
	142	/*
	143	* Default implementations for the irq-descriptor API:
	144	*/
1da177e4	145	#ifndef CONFIG_IA64_GENERIC
1115200a KK	146	static inline ia64_vector __ia64_irq_to_vector(int irq)
	147	{
	148	return irq_cfg[irq].vector;
	149	}
	150
1da177e4 LT	151	static inline unsigned int
	152	__ia64_local_vector_to_irq (ia64_vector vec)
	153	{
6065a244	154	return __this_cpu_read(vector_irq[vec]);
1da177e4 LT	155	}
	156	#endif
	157
	158	/*
	159	* Next follows the irq descriptor interface. On IA-64, each CPU supports 256 interrupt
	160	* vectors. On smaller systems, there is a one-to-one correspondence between interrupt
	161	* vectors and the Linux irq numbers. However, larger systems may have multiple interrupt
	162	* domains meaning that the translation from vector number to irq number depends on the
	163	* interrupt domain that a CPU belongs to. This API abstracts such platform-dependent
	164	* differences and provides a uniform means to translate between vector and irq numbers
	165	* and to obtain the irq descriptor for a given irq number.
	166	*/
	167
1da177e4 LT	168	/* Extract the IA-64 vector that corresponds to IRQ. */
	169	static inline ia64_vector
	170	irq_to_vector (int irq)
	171	{
1115200a	172	return platform_irq_to_vector(irq);
1da177e4 LT	173	}
	174
	175	/*
	176	* Convert the local IA-64 vector to the corresponding irq number. This translation is
	177	* done in the context of the interrupt domain that the currently executing CPU belongs
	178	* to.
	179	*/
	180	static inline unsigned int
	181	local_vector_to_irq (ia64_vector vec)
	182	{
	183	return platform_local_vector_to_irq(vec);
	184	}
	185
	186	#endif /* _ASM_IA64_HW_IRQ_H */