149 lines
4.8 KiB
C
149 lines
4.8 KiB
C
#ifndef _ASM_IA64_HW_IRQ_H
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#define _ASM_IA64_HW_IRQ_H
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/*
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* Copyright (C) 2001-2003 Hewlett-Packard Co
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* David Mosberger-Tang <davidm@hpl.hp.com>
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*/
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#include <linux/interrupt.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <linux/profile.h>
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#include <asm/machvec.h>
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#include <asm/ptrace.h>
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#include <asm/smp.h>
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typedef u8 ia64_vector;
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/*
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* 0 special
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*
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* 1,3-14 are reserved from firmware
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*
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* 16-255 (vectored external interrupts) are available
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*
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* 15 spurious interrupt (see IVR)
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*
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* 16 lowest priority, 255 highest priority
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*
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* 15 classes of 16 interrupts each.
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*/
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#define IA64_MIN_VECTORED_IRQ 16
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#define IA64_MAX_VECTORED_IRQ 255
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#define IA64_NUM_VECTORS 256
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#define AUTO_ASSIGN -1
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#define IA64_SPURIOUS_INT_VECTOR 0x0f
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/*
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* Vectors 0x10-0x1f are used for low priority interrupts, e.g. CMCI.
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*/
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#define IA64_CPEP_VECTOR 0x1c /* corrected platform error polling vector */
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#define IA64_CMCP_VECTOR 0x1d /* corrected machine-check polling vector */
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#define IA64_CPE_VECTOR 0x1e /* corrected platform error interrupt vector */
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#define IA64_CMC_VECTOR 0x1f /* corrected machine-check interrupt vector */
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/*
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* Vectors 0x20-0x2f are reserved for legacy ISA IRQs.
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* Use vectors 0x30-0xe7 as the default device vector range for ia64.
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* Platforms may choose to reduce this range in platform_irq_setup, but the
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* platform range must fall within
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* [IA64_DEF_FIRST_DEVICE_VECTOR..IA64_DEF_LAST_DEVICE_VECTOR]
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*/
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extern int ia64_first_device_vector;
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extern int ia64_last_device_vector;
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#define IA64_DEF_FIRST_DEVICE_VECTOR 0x30
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#define IA64_DEF_LAST_DEVICE_VECTOR 0xe7
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#define IA64_FIRST_DEVICE_VECTOR ia64_first_device_vector
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#define IA64_LAST_DEVICE_VECTOR ia64_last_device_vector
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#define IA64_MAX_DEVICE_VECTORS (IA64_DEF_LAST_DEVICE_VECTOR - IA64_DEF_FIRST_DEVICE_VECTOR + 1)
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#define IA64_NUM_DEVICE_VECTORS (IA64_LAST_DEVICE_VECTOR - IA64_FIRST_DEVICE_VECTOR + 1)
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#define IA64_MCA_RENDEZ_VECTOR 0xe8 /* MCA rendez interrupt */
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#define IA64_PERFMON_VECTOR 0xee /* performanc monitor interrupt vector */
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#define IA64_TIMER_VECTOR 0xef /* use highest-prio group 15 interrupt for timer */
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#define IA64_MCA_WAKEUP_VECTOR 0xf0 /* MCA wakeup (must be >MCA_RENDEZ_VECTOR) */
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#define IA64_IPI_LOCAL_TLB_FLUSH 0xfc /* SMP flush local TLB */
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#define IA64_IPI_RESCHEDULE 0xfd /* SMP reschedule */
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#define IA64_IPI_VECTOR 0xfe /* inter-processor interrupt vector */
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/* Used for encoding redirected irqs */
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#define IA64_IRQ_REDIRECTED (1 << 31)
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/* IA64 inter-cpu interrupt related definitions */
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#define IA64_IPI_DEFAULT_BASE_ADDR 0xfee00000
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/* Delivery modes for inter-cpu interrupts */
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enum {
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IA64_IPI_DM_INT = 0x0, /* pend an external interrupt */
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IA64_IPI_DM_PMI = 0x2, /* pend a PMI */
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IA64_IPI_DM_NMI = 0x4, /* pend an NMI (vector 2) */
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IA64_IPI_DM_INIT = 0x5, /* pend an INIT interrupt */
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IA64_IPI_DM_EXTINT = 0x7, /* pend an 8259-compatible interrupt. */
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};
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extern __u8 isa_irq_to_vector_map[16];
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#define isa_irq_to_vector(x) isa_irq_to_vector_map[(x)]
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extern struct hw_interrupt_type irq_type_ia64_lsapic; /* CPU-internal interrupt controller */
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extern int assign_irq_vector (int irq); /* allocate a free vector */
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extern void free_irq_vector (int vector);
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extern int reserve_irq_vector (int vector);
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extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect);
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extern void register_percpu_irq (ia64_vector vec, struct irqaction *action);
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static inline void ia64_resend_irq(unsigned int vector)
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{
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platform_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0);
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}
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/*
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* Default implementations for the irq-descriptor API:
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*/
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extern irq_desc_t irq_desc[NR_IRQS];
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#ifndef CONFIG_IA64_GENERIC
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static inline unsigned int
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__ia64_local_vector_to_irq (ia64_vector vec)
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{
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return (unsigned int) vec;
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}
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#endif
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/*
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* Next follows the irq descriptor interface. On IA-64, each CPU supports 256 interrupt
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* vectors. On smaller systems, there is a one-to-one correspondence between interrupt
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* vectors and the Linux irq numbers. However, larger systems may have multiple interrupt
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* domains meaning that the translation from vector number to irq number depends on the
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* interrupt domain that a CPU belongs to. This API abstracts such platform-dependent
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* differences and provides a uniform means to translate between vector and irq numbers
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* and to obtain the irq descriptor for a given irq number.
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*/
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/* Extract the IA-64 vector that corresponds to IRQ. */
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static inline ia64_vector
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irq_to_vector (int irq)
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{
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return (ia64_vector) irq;
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}
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/*
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* Convert the local IA-64 vector to the corresponding irq number. This translation is
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* done in the context of the interrupt domain that the currently executing CPU belongs
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* to.
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*/
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static inline unsigned int
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local_vector_to_irq (ia64_vector vec)
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{
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return platform_local_vector_to_irq(vec);
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}
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#endif /* _ASM_IA64_HW_IRQ_H */
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